{"id":2227,"date":"2018-05-09T07:35:00","date_gmt":"2018-05-09T07:35:00","guid":{"rendered":"https:\/\/www.ibac-cp.rwth-aachen.de\/?p=2227"},"modified":"2022-03-03T11:18:50","modified_gmt":"2022-03-03T11:18:50","slug":"veroeffentlichung-5","status":"publish","type":"post","link":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/aktuelles\/2018\/veroeffentlichung-5\/","title":{"rendered":"Publication"},"content":{"rendered":"<p>A. Jung, O. Weichold<br>Soft Matter. <strong>2018<\/strong><br><a href=\"https:\/\/doi.org\/10.1039\/c8sm01158c\">To the article\u2192<\/a><\/p>\n\n\n\n<p><em>Preparation and characterisation of highly alkaline hydrogels for the re-alkalisation of carbonated cementitious materials<\/em><\/p>\n\n\n\n<p><br>ABSTRACT:\n Highly alkaline hydrogels that allow the restoration of alkaline buffer\n in cementitious materials can be obtained from diallyldimethylammonium \nhydroxide. The latter must be prepared in dilute solutions and \npolymerised at ambient temperatures in order to avoid decomposition. \nUsing methacrylamide as a neutral co-monomer capable of forming hydrogen\n bonds, the rheological properties of the gels can be adjusted over a \nwide range; e.g. the viscosity increases a thousandfold from 0.35 Pa\u00b7s \nto 4350 Pa\u00b7s by using 10 mol% methacrylamide. For the proof of principle\n experiments, gels with 9 mol% methacrylamide were used, which contain \napprox. 1.6 mol hydroxide ions per kg gel. Ion exchange between this and\n a neutral chloride containing gel provided an apparent diffusion \ncoefficient of 4.12\u00b710\u22127 m2 s\u22121 for the hydroxide ions and confirmed the\n transport of chloride ions into the alkaline gel. The re-alkalisation \nwas tested on fully carbonated mortar prisms made from Portland cement. \nRe-alkalisation of the mortar was confirmed by the phenolphthalein test \naccording to DIN EN 14630:2007-01 and by a control experiment with pure \ncalcium carbonate using IR spectroscopy.<\/p>","protected":false},"excerpt":{"rendered":"<p>A. Jung, O. WeicholdSoft Matter. 2018Zum Artikel\u2192 Preparation and characterisation of highly alkaline hydrogels for the re-alkalisation of carbonated cementitious materials ABSTRACT: Highly alkaline hydrogels that allow the restoration of alkaline buffer in cementitious materials can be obtained from diallyldimethylammonium hydroxide. The latter must be prepared in dilute solutions and polymerised at ambient temperatures in [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":2228,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":""},"categories":[12,15],"tags":[],"class_list":["post-2227","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-poly-news","category-poly-news2018"],"_links":{"self":[{"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/posts\/2227","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=2227"}],"version-history":[{"count":1,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/posts\/2227\/revisions"}],"predecessor-version":[{"id":2229,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/posts\/2227\/revisions\/2229"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/media\/2228"}],"wp:attachment":[{"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/media?parent=2227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/categories?post=2227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ibac-cp.rwth-aachen.de\/en\/wp-json\/wp\/v2\/tags?post=2227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}