Early Stage Hydration Mechanism of Cellulose Ether Modified Thin Layer Cement Pastes

查看全文 作　　者：[1]马保国;SU [1]Lei;JIAN [1]Shouwei;SONG [1]Xuefeng

机构地区：[1]State Key Laboratory of Silicate Building Materials,Wuhan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2012年第27卷第6期,共5页

基　　金：Funded by the Youth Fund of National Natural Science Foundation of China (50902107) 摘　　要：The early stage hydration mechanism of cellulose ether modified thin layer cement pastes was studied, using brick as the matrix. Samples of 6 h, 24 h, and 3 d and 7 d hydration time were analyzed to study the hydration law on the surface of high water-absorbing matrix. Hydration products were qualitatively and semi-quantitatively analyzed using XRD, TG-DSC-DTG, FTIR and SEM. The experimental results show that there is no enough water for 2 mm thick cement pastes to hydrate, because of rapid water absorption of matrix. Trace amounts of Ca (OH)2 was detected after three days hydration. With the prolongation of hydration time, the category and concentration of hydration products do not change. Compared with 2 mm thick cement pastes, 6 mm thick cement pastes and 10 mm thick cement pastes have lower dehydration rate and water loss. The humidity field of the cement paste show different changes within the same time. 6 mm thick cement paste and 10 mm thick cement pastes have longer time and more water to hydrate. Ca(OH)2 and ettringite were detected after 6 hours hydration and the concentrations of hydration products increased from 24 hours to 7 days. 关键词：水泥水化水化机理纤维素醚薄层改性早期 CA(OH)2 水化产物

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Early Stage Hydration Mechanism of Cellulose Ether Modified Thin Layer Cement Pastes

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