{"id":91574,"date":"2025-09-10T09:02:39","date_gmt":"2025-09-10T07:02:39","guid":{"rendered":"https:\/\/www.simagazin.com\/?p=91574"},"modified":"2025-10-31T10:25:00","modified_gmt":"2025-10-31T09:25:00","slug":"recycled-concrete-a-storage-for-co2","status":"publish","type":"post","link":"https:\/\/www.simagazin.com\/en\/si-alpin\/topics\/maintenance-service\/recycled-concrete-a-storage-for-co2\/","title":{"rendered":"Recycled concrete: a storage for CO2?"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 gradient-container-1 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#e2e2e2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_6 1_6 fusion-one-sixth fusion-column-first gradient-column-1\" style=\"width:16.666666666667%;width:calc(16.666666666667% - ( ( 20px ) * 0.16666666666667 ) );margin-right: 20px;margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-1 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_2_3 2_3 fusion-two-third fusion-column-last gradient-column-2\" style=\"width:66.666666666667%;width:calc(66.666666666667% - ( ( 20px ) * 0.66666666666667 ) );margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-1\"><p>Concrete is one of the most important building materials of our time\u2014not just for the cable car industry. Global concrete production is estimated at 30 billion tons per year. In theory, that could cover all of Austria with a 15-centimeter-thick layer of concrete.<\/p>\n<p>Given these volumes, it is crucial to save resources by reusing old concrete.<\/p>\n<p>Construction waste (from demolished concrete, building rubble, or masonry) is processed, and the recycled aggregates can then be used to produce new concrete, resulting in recycled concrete.<\/p>\n<h3>Disadvantages can be offset<\/h3>\n<p>However, recycled concrete has inferior mechanical properties compared to conventional concrete made with natural aggregates.<\/p>\n<p>Experiments show that this drawback can be addressed\u2014using a strategy that brings an additional major advantage: the properties of recycled concrete can be improved by storing CO2 in the recycled aggregates.<\/p>\n<p>The CO2 is then converted into limestone, strengthening the material and remaining permanently stored in the recycled concrete. TU Vienna is working intensively on this topic in cooperation with the Austrian concrete industry as part of the <em>UP!crete<\/em> industry project of the ecoplus Bau.Energie.Umwelt Cluster Lower Austria.<\/p>\n<\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-2 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container gradient-container-2 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#e2e2e2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:calc( 1120px + 0px );margin-left: calc(-0px \/ 2 );margin-right: calc(-0px \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_6 1_6 fusion-flex-column gradient-column-3\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-3 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-2{width:16.666666666667% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-2 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 0px;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 0px;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-2{width:100% !important;}.fusion-builder-column-2 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-2{width:100% !important;}.fusion-builder-column-2 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}<\/style><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_2_3 2_3 fusion-flex-column gradient-column-4\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start\" style=\"width:calc( 100% + 0px ) !important;max-width:calc( 100% + 0px ) !important;margin-left: calc(-0px \/ 2 );margin-right: calc(-0px \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-0 fusion_builder_column_inner_1_3 1_3 fusion-flex-column si-quotebox si-quotebox-left\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div style=\"text-align:center;\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img width=\"800\" image_height=\"1200\" image_id=\"73749\" title=\"webMerta\" src=\"https:\/\/www.simagazin.com\/wp-content\/uploads\/2025\/02\/webMerta.jpg\" class=\"img-responsive wp-image-73749\" srcset=\"https:\/\/www.simagazin.com\/wp-content\/uploads\/2025\/02\/webMerta-200x300.jpg 200w, https:\/\/www.simagazin.com\/wp-content\/uploads\/2025\/02\/webMerta-400x600.jpg 400w, https:\/\/www.simagazin.com\/wp-content\/uploads\/2025\/02\/webMerta-600x900.jpg 600w, https:\/\/www.simagazin.com\/wp-content\/uploads\/2025\/02\/webMerta.jpg 800w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 400px\" \/><\/span><\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-nested-column-0{width:33.333333333333% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-nested-column-0 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 0px;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 0px;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-nested-column-0{width:100% !important;order : 0;}.fusion-builder-nested-column-0 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-nested-column-0{width:100% !important;order : 0;}.fusion-builder-nested-column-0 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}<\/style><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-1 fusion_builder_column_inner_2_3 2_3 fusion-flex-column si-quotebox si-quotebox-right\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">@media only screen and (max-width:1024px) {.fusion-title.fusion-title-1{margin-top:0px!important;margin-bottom:25px!important;}}@media only screen and (max-width:640px) {.fusion-title.fusion-title-1{margin-top:0px!important;margin-bottom:25px!important;}}<\/style><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-three\" style=\"margin-top:0px;margin-bottom:25px;\"><h3 class=\"title-heading-left\" style=\"margin:0;\">Ildiko Merta<\/h3><\/div><style type=\"text\/css\">@media only screen and (max-width:1024px) {.fusion-title.fusion-title-2{margin-top:0px!important;margin-bottom:25px!important;}}@media only screen and (max-width:640px) {.fusion-title.fusion-title-2{margin-top:0px!important;margin-bottom:25px!important;}}<\/style><div class=\"fusion-title title fusion-title-2 fusion-sep-none fusion-title-text fusion-title-size-four\" style=\"margin-top:0px;margin-bottom:25px;\"><h4 class=\"title-heading-left\" style=\"margin:0;\">Professor at the Institute of Materials Technology, Building Physics, and Building Ecology, TU Vienna<\/h4><\/div><div class=\"fusion-text fusion-text-2\"><p>\u201cNot all concrete is the same: while it\u2019s simpler to use indoors, outdoor concrete must withstand moisture and temperature fluctuations, and in the cable car sector, it also needs to resist frost and de-icing salts. Since recycled concrete is naturally more porous than conventional concrete, it could be ideal for building cable car stations and support foundations. So far\u2014at least in Austria\u2014it is not yet approved for this use, but our ongoing research aims to change that. For interior construction and frost-resistant outdoor areas, cable car operators can already use recycled concrete, albeit only up to a maximum of 50%.\u201d<\/p>\n<\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-nested-column-1{width:66.666666666667% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-nested-column-1 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 0px;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 0px;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-nested-column-1{width:100% !important;order : 0;}.fusion-builder-nested-column-1 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-nested-column-1{width:100% !important;order : 0;}.fusion-builder-nested-column-1 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}<\/style><\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-4 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-3{width:66.666666666667% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-3 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 0px;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 0px;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-3{width:100% !important;}.fusion-builder-column-3 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-3{width:100% !important;}.fusion-builder-column-3 > .fusion-column-wrapper {margin-right : 0px;margin-left : 0px;}}<\/style><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-2{ padding-top : 0px;margin-top : 50px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 50px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-3 gradient-container-3 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#e2e2e2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_6 1_6 fusion-one-sixth fusion-column-first gradient-column-5\" style=\"width:16.666666666667%;width:calc(16.666666666667% - ( ( 20px ) * 0.16666666666667 ) );margin-right: 20px;margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-5 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-5 fusion_builder_column_2_3 2_3 fusion-two-third fusion-column-last gradient-column-6\" style=\"width:66.666666666667%;width:calc(66.666666666667% - ( ( 20px ) * 0.66666666666667 ) );margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-3\"><h3>Limited recycling<\/h3>\n<p>\u201cConcrete basically has three main components: aggregate\u2014such as sand, gravel, or crushed stone\u2014cement, and water,\u201d explains Prof. <strong>Ildiko Merta<\/strong> from the Institute of Materials Technology, Building Physics, and Building Ecology.<\/p>\n<p>The scientific lead of the UP!crete research project emphasizes: \u201cThe type of aggregates used in concrete has a decisive influence on its properties, such as strength and durability.\u201d Part of the natural aggregates can be replaced with recycled aggregates\u2014for example, construction waste from demolished concrete buildings.<\/p>\n<p>The problem, however, is that recycled aggregates are highly porous; they are not as dense as natural stone and absorb significantly more water. The strength and durability of concrete decrease considerably if too high a proportion of recycled aggregates is used in its production.<\/p>\n<p>\u201cCurrent national standards allow a maximum addition of 50 percent,\u201d says Ildiko Merta. \u201cOur goal, however, would be a recycling rate of 80 percent or even higher, since construction waste is generally available in large quantities.\u201d<\/p>\n<\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-6 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-4 image-wide-container gradient-container-4 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling fusion-equal-height-columns\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#e2e2e2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-6 fusion_builder_column_1_6 1_6 fusion-one-sixth fusion-column-first gradient-column-7\" style=\"width:16.666666666667%;width:calc(16.666666666667% - ( ( 20px ) * 0.16666666666667 ) );margin-right: 20px;margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-column-content-centered\"><div class=\"fusion-column-content\"><div class=\"cbp-headline cbp-1464198532\"><div class=\"custom-si is-underline text-right\"><H3>Would recycled concrete also be of interest for the cable car industry?<\/H3><\/div><\/div><div class=\"fusion-text fusion-text-4\"><p style=\"text-align: right;\">In frost conditions, the material &#8211; at least in Austria &#8211; is not yet approved; in other areas, its use is permitted.<\/p>\n<\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-7 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-7 fusion_builder_column_5_6 5_6 fusion-five-sixth fusion-column-last gradient-column-8\" style=\"width:83.333333333333%;width:calc(83.333333333333% - ( ( 20px ) * 0.83333333333333 ) );margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-column-content-centered\"><div class=\"fusion-column-content\"><div class=\"cbp-qcustomelement- cbp-336779685\"><div class=\"custom-si-image \"><img src=\"https:\/\/www.simagazin.com\/wp-content\/uploads\/2025\/02\/webBaustelle-Talabfahrt-Gaschurn.jpg\" \/><div class=\"copyright\">\u00a9 Symbolbild AEP<\/div><\/div><\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-8 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-5 gradient-container-5 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#e2e2e2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-8 fusion_builder_column_1_6 1_6 fusion-one-sixth fusion-column-first gradient-column-9\" style=\"width:16.666666666667%;width:calc(16.666666666667% - ( ( 20px ) * 0.16666666666667 ) );margin-right: 20px;margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-9 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-9 fusion_builder_column_2_3 2_3 fusion-two-third fusion-column-last gradient-column-10\" style=\"width:66.666666666667%;width:calc(66.666666666667% - ( ( 20px ) * 0.66666666666667 ) );margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-5\"><h3>High-performance concrete types<\/h3>\n<p>TU Vienna has conducted extensive experiments and developed various recycled concrete formulations. Different measures can improve the properties of the concrete\u2014such as coating techniques, the addition of additives, or special mechanical processing of the aggregates. This results in high-performance recycled concrete types suitable for diverse applications.<\/p>\n<h3>Concrete as a CO2 sink<\/h3>\n<p>Significant success has been achieved using CO2: \u201cCarbon dioxide is injected into recycled aggregates. Carbonation occurs, a chemical reaction that converts the gaseous CO2 into limestone\u2014similar to the lime deposits you see in bathrooms when water contains a lot of calcium,\u201d says Ildiko Merta.<\/p>\n<p>In this way, carbon that would otherwise harm the climate as CO2 in the atmosphere is stored for long periods.<\/p>\n<p>With the methods developed and tested at TU Vienna, builders can achieve two major benefits simultaneously: on one hand, the proportion of recycled material used can be increased while improving concrete quality; on the other hand, it also benefits the climate by permanently removing carbon from the atmosphere.<\/p>\n<\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-10 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-6 image-wide-container gradient-container-6 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling fusion-equal-height-columns\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#e2e2e2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-10 fusion_builder_column_1_6 1_6 fusion-one-sixth fusion-column-first gradient-column-11\" style=\"width:16.666666666667%;width:calc(16.666666666667% - ( ( 20px ) * 0.16666666666667 ) );margin-right: 20px;margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-column-content-centered\"><div class=\"fusion-column-content\"><div class=\"cbp-headline cbp-1104671275\"><div class=\"custom-si is-underline text-right\"><H3>A victory against strong competition:<\/H3><\/div><\/div><div class=\"fusion-text fusion-text-6\"><p style=\"text-align: right;\">The research project UP!crete won the Lower Austria Clusterland Award 2024. The team was able to prevail against strong competition from twelve projects.<\/p>\n<\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-11 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-11 fusion_builder_column_5_6 5_6 fusion-five-sixth fusion-column-last gradient-column-12\" style=\"width:83.333333333333%;width:calc(83.333333333333% - ( ( 20px ) * 0.83333333333333 ) );margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-column-content-centered\"><div class=\"fusion-column-content\"><div class=\"cbp-qcustomelement- cbp-1332593827\"><div class=\"custom-si-image \"><img src=\"https:\/\/www.simagazin.com\/wp-content\/uploads\/2025\/02\/webUPcrete_Award-winning.jpg\" \/><div class=\"copyright\">\u00a9 TU Wien<\/div><\/div><\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-12 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-7 gradient-container-7 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#e2e2e2;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-12 fusion_builder_column_1_6 1_6 fusion-one-sixth fusion-column-first gradient-column-13\" style=\"width:16.666666666667%;width:calc(16.666666666667% - ( ( 20px ) * 0.16666666666667 ) );margin-right: 20px;margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-13 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-13 fusion_builder_column_2_3 2_3 fusion-two-third fusion-column-last gradient-column-14\" style=\"width:66.666666666667%;width:calc(66.666666666667% - ( ( 20px ) * 0.66666666666667 ) );margin-top:0px;margin-bottom:20px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-7\"><h3>Not just in the laboratory<\/h3>\n<p>In her research, Ildiko Merta places great emphasis on developing technically optimal and economically attractive methods in collaboration with industry\u2014methods that are applicable not only in the laboratory but also on a large industrial scale.<\/p>\n<blockquote>\n<p>\u201cThe efficiency of carbonation depends on many parameters, such as pressure, temperature, humidity, or CO2 concentration. However, the optimal conditions are not necessarily those that can be achieved in industrial processes with reasonable effort. Therefore, it is essential to carefully consider which methods are not only technically feasible but also realistic and efficiently implementable for industry,\u201d says Ildiko Merta.<\/p>\n<\/blockquote>\n<p><em>UP!crete is funded by the FFG Basic Program Collective Research with resources from the BMK and co-financed by project partners.<\/em><\/p>\n<\/div><style type=\"text\/css\">.fusion-builder-row .fusion-layout-column.gradient-column-14 .fusion-column-wrapper:before {content: \"\"; position: absolute; width: 100%; height: 100%; top: 0; left: 0;z-index:-1;background: -webkit-gradient(linear, left top, right top, from(), to())!important;background: -webkit-linear-gradient(0deg, , )!important;background: -moz-linear-gradient(0deg, , )!important;background: -ms-linear-gradient(0deg, , )!important;background: -o-linear-gradient(0deg, , )!important;}<\/style><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>New concrete recycling methods combine two key environmental benefits: they save raw materials and can permanently bind climate-damaging CO2 that would otherwise be released into the atmosphere. An opportunity for the cable car industry?<\/p>\n","protected":false},"author":2,"featured_media":73754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[181],"tags":[241],"_links":{"self":[{"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/posts\/91574"}],"collection":[{"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/comments?post=91574"}],"version-history":[{"count":1,"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/posts\/91574\/revisions"}],"predecessor-version":[{"id":91575,"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/posts\/91574\/revisions\/91575"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/media\/73754"}],"wp:attachment":[{"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/media?parent=91574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/categories?post=91574"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.simagazin.com\/en\/wp-json\/wp\/v2\/tags?post=91574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}