JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2018, Vol. 48 ›› Issue (2): 39-45.doi: 10.6040/j.issn.1672-3961.0.2017.066

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Experiment of cement-based seepage grouting materials for earth-rock dam

LIU Jian1, HU Nanqi1, XU Baojun2, YUE Xiuli1, QI Boliang1, ZHONG Qi1   

  1. 1. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Shandong Province Urban and Rural Construction Survey and Resign Institute, Jinan 250031, Shandong, China
  • Received:2017-02-24 Online:2018-04-20 Published:2017-02-24

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Abstract: In order to solve the problem of poor fluidity and low stone rate of grouting materials commonly used in hydraulic engineering, the experiments were conducted to investigate the improvements on the reinforcement effect of the existing grouting materials as cement, through backfilling fly ash and bentonite in cement as the water reducing agent and expansive agent respectively. Laboratory tests concentrated on investigating the two concerned physical properties of the examined grouting materials—the slurry fluidity and concretion, under different mixture proportions of the backfilled materials. Based on the experimentally obtained results, appropriate material mixture proportions were given based on the optimum improvement on the reinforcement effects. The result showed that bentonite could increase the stone rate of grouting, improve the slurry stability and reduce the slurry fluidity. The addition of appropriate amount of fly ash could improve the slurry fluidity and increase the grouting efficiency. As the proportions of the fly ash and bentonite increased, the concretion strength reduced, so it was suggested to control the mixture proportions of the backfilled materials in order to achieve an optimum strengthening effect. The results provided references for the applications of grouting reinforcement in hydraulic engineering.

Key words: bentonite, grouting material, slurry fluidity, cement, fly ash, seepage control of earth-rock dam

CLC Number: 

  • TU457.5
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