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Influence of Superplasticizer Type and Dosage on Early-age Drying Shrinkage of Cement Paste with Consideration of Pore Size Distribution and Water Loss

  • Cementitious Materials
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Abstract

We introduced a parameter rs (the radius of the pores where the meniscus forms), which is composed of two factors, i e, water loss and cumulative pore size distribution (PSD), to provide a better explanation of the influence of superplasticizers(SPs) on early-age drying shrinkage. In our experiments, it is found that the addition of three types of SPs leads to a significant increase in the early-age drying shrinkage of cement paste, and drying shrinkage increases with the dosage of SPs. Based on the results above, we further studied the mechanism of the effects of SPs on the early-age drying shrinkage of cement paste by PSD and water loss, which are two components of rs. The experimental results indicate that rs can be a better index for the early-age drying shrinkage of cement-based materials with SPs than a single factor. In addition, the effects of SPs on other factors such as hydration degree and elastic modulus were also investigated and discussed.

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Authors and Affiliations

  1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China

    Xiaoqian Qian  (钱晓倩), Congdi Yu, Lifeng Zhang, Kuangliang Qian, Minghui Fang & Junying Lai

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  1. Xiaoqian Qian  (钱晓倩)
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  2. Congdi Yu
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  3. Lifeng Zhang
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  4. Kuangliang Qian
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  5. Minghui Fang
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  6. Junying Lai
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Correspondence to Xiaoqian Qian  (钱晓倩).

Additional information

Funded by the Key Research and Development Program of Zhejiang Province in 2018 (No:2018C03033-1)

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Qian, X., Yu, C., Zhang, L. et al. Influence of Superplasticizer Type and Dosage on Early-age Drying Shrinkage of Cement Paste with Consideration of Pore Size Distribution and Water Loss. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 35, 758–767 (2020). https://doi.org/10.1007/s11595-020-2318-1

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  • DOI: https://doi.org/10.1007/s11595-020-2318-1

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