{"id":2272,"date":"2020-10-06T07:48:00","date_gmt":"2020-10-06T07:48:00","guid":{"rendered":"https:\/\/www.ibac-cp.rwth-aachen.de\/?p=2272"},"modified":"2022-03-03T11:18:08","modified_gmt":"2022-03-03T11:18:08","slug":"veroeffentlichung-11","status":"publish","type":"post","link":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/aktuelles\/2020\/veroeffentlichung-11\/","title":{"rendered":"Publication"},"content":{"rendered":"<p>A. Jung, M. B. Endres, O. Weichold <br>Polymers 2020 <br><a href=\"https:\/\/www.mdpi.com\/2073-4360\/12\/10\/2185\/pdf\">To the article\u2192<\/a><\/p>\n\n\n\n<p><em>Influence of Environmental Factors on the Swelling Capacities of Superabsorbent Polymers Used in Concrete<\/em><\/p>\n\n\n\n<p> ABSTRACT: Superabsorbent polymers (SAP) are of major interest as  materials to control the cement hydration process. The swelling behavior  of the SAPs significantly influences the performance of the resulting  concrete by slowly releasing polymer-bound water in order to maintain a  consistent w\/c value. A round-robin test conducted by the RILEM  Technical Committee 260-RSC showed that the same batch of polymer can  lead to large deviations in concrete performance and this was assumed to  originate in di<br>erent storage conditions of the SAP. In this  contribution the change in the performance of two SAPs, a crosslinked  poly(acrylate) and a crosslinked poly(acrylate-co-acrylamide), was  assessed after ageing in standard climate, at 50 <br>\u00b0C, and under UV  irradiation. During storage in standard climate or 50 \u00b0C, ageing led to  dehydration of the SAP, and this subsequently led to a higher water  uptake during swelling. By contrast, UV irradiation reduced the water  uptake, most likely as a result of photo-crosslinking. Dynamic water  vapor sorption experiments indicated a strong dependence of the water  uptake on both the ambient humidity and the temperature. As a result,  cement mixtures containing SAP must be calculated on the dry mass of the  SAP rather than the actual weight on site. A standard procedure of how  to pack and handle SAP to be used in concrete is also provided. <\/p>","protected":false},"excerpt":{"rendered":"<p>A. Jung, M. B. Endres, O. Weichold Polymers 2020 Zum Artikel\u2192 Influence of Environmental Factors on the Swelling Capacities of Superabsorbent Polymers Used in Concrete ABSTRACT: Superabsorbent polymers (SAP) are of major interest as materials to control the cement hydration process. The swelling behavior of the SAPs significantly influences the performance of the resulting concrete [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":2273,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":""},"categories":[12,17],"tags":[],"class_list":["post-2272","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-poly-news","category-poly-news2020"],"_links":{"self":[{"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/posts\/2272","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/comments?post=2272"}],"version-history":[{"count":1,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/posts\/2272\/revisions"}],"predecessor-version":[{"id":2274,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/posts\/2272\/revisions\/2274"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/media\/2273"}],"wp:attachment":[{"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/media?parent=2272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/categories?post=2272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/tags?post=2272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}