Abstract
Setting times, as the early-age properties of cement-based materials, are important properties to ensure the quality and long-term performance of engineering structures. To determine the initial and final setting times of cementitious materials, the compressive wave velocity and shear wave velocity of six early-age mortar samples were monitored. Their time evolution curves of Young's modulus, shear modulus, bulk modulus, and Poisson's ratio were then calculated and analyzed. The signature times of the derivatives of the Poisson's ratio evolution curves correlate well with the initial and final setting times, and the remarkably high coefficient of determination values relative to the data from this study are higher than those presented in the current literature. The proposed derivative method on the Poisson's ratio evolution curve is as good as the derivative methods from vs. evolution curves used by prior studies for the estimation of both the initial and final setting times of the early-age properties of cement-based materials. The formation and subsequent disappearance of ettringite of low Poisson's ratio were postulated to cause the initial dip in the Poisson's ratio evolution curves.
Recommended Citation
B. Bate et al., "Setting Times of Early-Age Mortars Determined from Evolution Curves of Poisson’s Ratio," Materials, vol. 15, no. 3, article no. 853, MDPI, Feb 2022.
The definitive version is available at https://doi.org/10.3390/ma15030853
Department(s)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Dynamic elastic modulus; Mortar; P-wave velocity; Poisson's ratio; Setting time
International Standard Serial Number (ISSN)
1996-1944
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Feb 2022
Comments
National Natural Science Foundation of China, Grant B18047