Using ultrasonic wave reflection to monitor false set of cement paste

被引：16

作者：

Chung, Chul-Woo ^{[1
]}

Suraneni, Prannoy ^{[2
]}

Popovics, John S. ^{[3
]}

Struble, Leslie J. ^{[3
]}

机构：

[1] Pukyong Natl Univ, Dept Architectural Engn, Busan 48513, South Korea

[2] Univ Miami, Dept Civil Architectural & Environm Engn, Coral Gables, FL 33146 USA

[3] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA

来源：

CEMENT & CONCRETE COMPOSITES | 2017年 / 84卷

关键词：

Secondary gypsum; False set; Ultrasonic wave reflection; Penetration resistance; Set; EARLY-AGE PROPERTIES; PORTLAND-CEMENT; SETTING TIME; P-WAVE; HYDRATION; CONCRETE; STRENGTH; PHASES;

D O I：

10.1016/j.cemconcomp.2017.08.010

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The standard mechanical penetration approach for monitoring cement paste stiffening (Vicat needle method, ASTM C191) does not distinguish responses associated with false set of cement paste caused by secondary gypsum formation. The objective of this research is to determine whether ultrasonic wave reflection, using a testing set up with high measurement sensitivity, could be used to monitor false set of cement paste. Penetration resistance, P-wave, and S-wave reflection coefficients were measured on cement pastes with water-to-cement ratio 0.5. The S-wave reflection coefficient showed a sharp and abrupt linear drop associated with secondary gypsum formation, thereby indicating that S-wave ultrasonic wave reflection can be used to monitor false set of cement pastes. False set could not be distinguished in penetration resistance or P-wave UWR test data. (c) 2017 Elsevier Ltd. All rights reserved.

引用

页码：10 / 18

页数：9

共 54 条

[1] Nondestructive measurement of concrete strength gain by an ultrasonic wave reflection method [J].