Simultaneous study of mechanical property development and early hydration chemistry in Portland cement slurries using X-ray diffraction and ultrasound reflection

被引：15
|
作者：
Jupe, Andrew C. [1 ]
Wilkinson, Angus P. [1 ,3 ]
Funkhouser, Gary P. [2 ]
机构：
[1] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
[2] Halliburton, Duncan Technol Ctr, Duncan, OK 73536 USA
[3] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
来源：
CEMENT AND CONCRETE RESEARCH | 2012年 / 42卷 / 08期
基金：
美国国家科学基金会;
关键词：
X-ray diffraction (B); Mechanical properties (C); CALCIUM-SILICATE-HYDRATE; TRICALCIUM SILICATE; FLOW BEHAVIOR; SHEAR-WAVE; PASTES; CHLORIDE; PROPAGATION; COHESION; CONCRETE; HYDROXIDE;
D O I：
10.1016/j.cemconres.2012.05.013
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A sample cell for the simultaneous measurement of synchrotron X-ray powder diffraction and ultrasound shear-wave reflection data from cement slurries is described. White cement slurries at 25 and 50 degrees C with 0-3% bwoc CaCl2 were studied to illustrate the potential of the apparatus. The decrease in reflected S-wave amplitude, in dB. showed a linear correlation with C3S hydration. CaCl2 retarded the development of G' and G '' relative to the extent of C3S hydration. At short times, there was a correlation between the time evolution of both G' and G '', and the amount of precipitated CH seen by diffraction, which was almost independent of CaCl2 concentration and temperature. CaCl2 addition resulted in a decrease in the amount of CH visible to X-rays, relative the degree of C3S hydration. This may indicate a change in C-S-H gel C:S ratio or the presence of nanoscale CH that could not be seen by diffraction. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1166 / 1173
页数：8
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