Examining the “time-zero” of autogenous shrinkage in high/ultra-high performance cement pastes

By Haoliang Huang, Guang Ye. 2017

136 citations recorded by the source corpus.

Abstract The term “Time-zero”, i.e., the time for the start of autogenous shrinkage measurement, is usually used for estimating the cracking potential of structural components. Accurate determination of the “time-zero” is therefore critical for autogenous shrinkage measurement, which is the main objective of this study. There is a general agreement about the existence of a relationship between autogenous shrinkage and RH changes in hardening cement paste. An improved hygrometer method was developed for monitoring the change of internal RH in cement pastes 1 h after casting. This provides immediate experimental results of RH change for determining the “time-zero”. It indicates that the internal RH of cement pastes does not decrease immediately after the final setting time. A new “time-zero” is defined as the onset of internal RH drop, which is more reasonable for estimating the cracking potential of cement-based materials, compared to the “time-zero” represented by the final setting time.

Subfields: Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/09cfae443da219b696d5f4bdd197f6a0658c340a

How researchers see this paper

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In Civil and Structural Engineering

1. Zhenming Li
2. M. Nedeljković
3. Bo-yu Chen
4. Guang Ye

Citations in the corpus

• Mitigating the autogenous shrinkage of alkali-activated slag by metakaolin (2019, methodology): “The internal RH of the pastes cured for 1 day and 7 days was monitored by Rotronic hygroscopic DT station equipped with HC2-AW measuring cells [48].”