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Experimental Study on the Relationship Between Grouting Pressure and Compressive Strength of Hardened Cement Paste

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Abstract

It is very difficult to predict the compressive strength of grouted hardened cement paste in the fracture areas when grouting technology is used for seepage prevention and reinforcement. In this paper, according to the Powers model of hardened cement paste, combined with indoor and field test data analysis, this study found that: (1) Under the condition that grouting pressure is zero, strength of hardened cement paste decreases with the increase of grout water cement ratio (W/C). Based on Powers model, the relation between grout strength of hardened cement paste and the ratio of paste mixing water is established; (2) The strength of grouting hardened cement paste in cracks increases with the increase of grouting pressure. The mechanism is that with the increase of grouting pressure, the real W/C of cement paste decreases, the paste is denser, as a consequence, the strength of grouting hardened cement paste is higher. (3) The calculation model of compressive strength and grouting pressure of grout hardened cement paste is established, and the compressive strength of grout hardened cement paste can be predicted according to grouting pressure and type of cement. The research results can provide the basis for the prediction and design of the compressive strength of grouting cement paste.

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Acknowledgements

The research is funded by the National Key Research and Development Program of China (2017YFC0404902), the National Natural Science Foundation of China (Nos. 51479048, 51678219), the Water Resources Department Science and Technology Program of Zhejiang province (No. RA1503) and University Natural Science Foundation of Education Department of Anhui Province (No. KJ2017A725).

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Authors and Affiliations

  1. College of Civil and Transportation Engineering, Hohai University, Nanjing, China

    Xiaohui Ma, Lunchao Zhang & Jikai Zhou

  2. Jiangsu Hehai Engineering Technology Co Ltd, Hohai University, Nanjing, China

    Xiaohui Ma

  3. School of Civil Engineering, Chuzhou Vocational and Technical College, Chuzhou, China

    Lunchao Zhang

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  1. Xiaohui Ma
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  2. Lunchao Zhang
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  3. Jikai Zhou
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Correspondence to Jikai Zhou.

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Ma, X., Zhang, L. & Zhou, J. Experimental Study on the Relationship Between Grouting Pressure and Compressive Strength of Hardened Cement Paste. Iran J Sci Technol Trans Civ Eng 44 (Suppl 1), 483–489 (2020). https://doi.org/10.1007/s40996-020-00363-3

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  • DOI: https://doi.org/10.1007/s40996-020-00363-3

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