https://www.scipedia.com/wd/index.php?action=history&feed=atom&title=Nakada_et_al_2020aNakada et al 2020a - Revision history2026-05-10T14:53:15ZRevision history for this page on the wikiMediaWiki 1.27.0-wmf.10https://www.scipedia.com/wd/index.php?title=Nakada_et_al_2020a&diff=170904&oldid=prevScipediacontent: Scipediacontent moved page Draft Content 207210058 to Nakada et al 2020a2020-09-17T14:28:03Z<p>Scipediacontent moved page <a href="/public/Draft_Content_207210058" class="mw-redirect" title="Draft Content 207210058">Draft Content 207210058</a> to <a href="/public/Nakada_et_al_2020a" title="Nakada et al 2020a">Nakada et al 2020a</a></p>
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</td></tr></table>Scipediacontenthttps://www.scipedia.com/wd/index.php?title=Nakada_et_al_2020a&diff=170903&oldid=prevScipediacontent: Created page with "== Abstract == The aim of the current study is to investigate the carbonation behavior of cement hydrates at different environments. Hardened cement pastes are prepared using..."2020-09-17T14:28:00Z<p>Created page with "== Abstract == The aim of the current study is to investigate the carbonation behavior of cement hydrates at different environments. Hardened cement pastes are prepared using..."</p>
<p><b>New page</b></p><div>== Abstract ==<br />
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The aim of the current study is to investigate the carbonation behavior of cement hydrates at different environments. Hardened cement pastes are prepared using OPC and BFS and crushed into ~90μm powder. The powder samples are carbonated at 5/20% CO2 and at 60/85%RH. TGA, XRD and phenolphthalein tests are conducted before and after carbonation. The results show that CH remain uncarbonated even after CO2 uptake apparently ended and that the amount of the residual CH affects the results of phenolphthalein test. External humidity strongly affects the carbonation behavior of both CH and other hydrates. The degree of CH carbonation is greater at higher humidity, while the degree of other hydrates carbonation is greater at lower humidity. This conflicting effect can occur at surface of bulk concretes and changes in its properties (coarsening of pore structure and cracking) can be caused without apparent carbonation detected by phenol phthalein test. The effect of relative humidity on CSH carbonation should be taken into consideration when estimating long-term performance of carbonated concretes.<br />
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== Full document ==<br />
<pdf>Media:Draft_Content_207210058p641.pdf</pdf></div>Scipediacontent