Effect of amino trimethylene phosphonic acid on hydration of Portland cement

被引：0
作者：
Li B. [1 ]
Lü X. [1 ,2 ]
Wei Y. [3 ]
Zhang J. [3 ]
机构：
[1] State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan
[2] Changjiang River Scientific Research Institute of Changjiang Water Resources Commission, Wuhan
[3] Hubei Hengli Construction Material Technology Co. Ltd., Jingzhou
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2016年 / 19卷 / 03期
关键词：
Hydration; Organic phosphonic acid; Portland cement; Retarding mechanism; Super retarder;
D O I：
10.3969/j.issn.1007-9629.2016.03.001
中图分类号：
学科分类号：
摘要：
The setting times and compressive strength of Portland cement pastes containing amino trimethy-lene phosphonic acid(ATMP) were tested. By means of hydration heat measurement, X-ray diffraction(XRD) analysis, differential thermal gravity(DTG) analysis, scanning electron microscope(SEM) analysis and Zeta potential test, the effects of ATMP on hydration of cement were investigated, and the retarding mechanism of ATMP on cement pastes was discussed. The results show that with the increase of use level (the mass percentage of cement) of ATMP, the setting time of cement pastes is gradually extended. Compared with the blank sample, the 3d compressive strength of cement pastes is reduced only when the use level of ATMP is greater than or equal to 0.08%, and the 28d compressive strength is increased when the use level of ATMP is ranging in 0.10%. In the initial stage of cement hydration, ATMP accelerates the hydration of C3A minerals. ATMP can chelate Ca2+ in the cement pastes to form sparingly soluble Ca3.5(C3H7O10NP3) chelation, and the chelation wraps on the surfaces of the unhydrated cement particles, which retards further hydration of C3S minerals and formation of Ca(OH)2, resulting in significant decreases in the hydration heat and hydration heat evolution rate of cement with the addition of ATMP. © 2016, Editorial Department of Journal of Building Materials. All right reserved.
引用
收藏
页码：417 / 423
页数：6
相关论文
共 18 条
[1]  
Ramachandran V.S., Lowery M.S., Wise T., Et al., The role of phosphonates in the hydration of Portland cement, Materials and Structures, 26, 7, pp. 425-432, (1993)
[2]  
Gu P., Ramachandran V.S., Beaudoin J.J., Et al., Electrochemical behavior of Portland cement pastes containing phosphonates, Advanced Cement Based Materials, 2, 5, pp. 182-188, (1995)
[3]  
Jupe A.C., Wilkinson A.P., Funkhouser G.P., The effect of pressure on tricalcium silicate hydration at different temperatures and in the presence of retarding additives, Cement and Concrete Research, 42, 8, pp. 1083-1087, (2012)
[4]  
Wen X., Wei Z., Li B., Et al., Study on high temperature cement slurry system, Drilling Fluid & Completion Fluid, 28, 5, pp. 50-53, (2011)
[5]  
Wang B., Wang L., A kind of super retarder of concrete and its preparation method
[6]  
Plank J., The research progress of concrete admixture in Europe nowadays, Conference of Concrete Admixture and Application Technology, pp. 13-27, (2004)
[7]  
Wu J., Wang P., Study of mechanism of sucrose adjusted Portland cement setting, Journal of the Chinese Ceramic Society, 26, 4, pp. 164-170, (1998)
[8]  
Ma B., Zhang L., Zhang P., Et al., Influence of sucrose on cement hydration process, Journal of the Chinese Ceramic Society, 32, 10, pp. 1285-1288, (2004)
[9]  
Ma B., Zhang L., Dong R., Et al., Influence of zinc salts on cement hydration process, Journal of Building Materials, 7, 4, pp. 442-446, (2004)
[10]  
Li G., He T., Hu D., Et al., Effects of two retarders on the fluidity of pastes plasticized with aminosulfonic acid-based superplasticizers, Construction and Building Materials, 26, 1, pp. 72-78, (2012)
12