The Research and Application of Self-Curing Concrete under Low Relative Humidity Environments

• Main Authors: Chen, Hong-Yi, 陳泓邑
• Other Authors: Jau, Wen-Chen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/15802862481424724663

碩士 === 國立交通大學 === 土木工程學系 === 99 === Curing is essential to achieve a good concrete with low permeability, high strength, high volume stability, and durability. Nowadays, the sustainability is a very important issue and reduction of carbon dioxide is required. Pozzolanic materials are added to concrete for this purpose. Moisture is needed for pozzolanic reactions and this makes curing even more important. This research studies the effect of hardened concrete of self-curing concrete(SCC) under various curing regime and low RH. The weight loss, volume change, strengths, and RCPT were studied. It is found that even under the low RH, the self-curing admixture can still function. The weight loss and volume stability of SCC with 3 days wet curing is less than the control concrete, which is 28 day wet cure. The SCC can reach 90% of targeted strength at 1 day. The RCPT of SCC with 3 days wet cure is similar to that of 28 days standard curing concrete. This results demonstrate that the SCC with 3 day wet cure can have properties of 14-28 days standard curing and SCC is very helpful to the quality of concrete.