Experimental Study on the Expansion of a New Cement-Based Borehole Sealing Material Using Different Additives and Varied Water–Cement Ratios
Experimental Study on the Expansion of a New Cement-Based Borehole Sealing Material Using Different Additives and Varied Water–Cement Ratios
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DOI：
10.1007/s13369-019-03837-3
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发表时间：
2019-04
影响因子：
2.9
通讯作者：
Chao Zhang;Hua Liu;Shugang Li;Chao Liu;L. Qin;Jie Chang;Renhui Cheng
中科院分区：
文献类型：
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作者：
Chao Zhang;Hua Liu;Shugang Li;Chao Liu;L. Qin;Jie Chang;Renhui Cheng
为研究一种新型密封材料的组成和水灰比对其膨胀性能的影响，确定了影响膨胀性能的因素。随后，通过单因素实验，探讨了水泥基密封胶中水灰比和特定添加剂对密封材料膨胀性能的影响。此外，根据Box-Behnken实验设计原则，利用响应面法确定了重要膨胀因子的排序。最后，得到了最佳实验条件。结果表明：影响因素按显著性排序为铝含量（掺等量CaO）、水灰比、石膏含量。在水灰比为0.6的料浆中，水泥加0.56%铝（与等量CaO混合）和2%石膏可获得最佳的密封胶配合比。
To investigate the effects of its composition and water–cement ratio on the expansion properties of a new sealing material, the factors which influence the expansion properties were identified. Subsequently, single-factor experiments were conducted to explore the effects of water–cement ratio and specific additives in a cement-based sealant on the expansion capability of the sealing material. Additionally, according to Box–Behnken experimental design principles, the rank of the important expansion factors were identified using response surface methodology. Finally, the optimal experimental conditions were obtained. The results show that the influencing factors, sorted by significance, are aluminum content (mixed with an equal amount of CaO) > water–cement ratio > gypsum content. The best mix for the sealant could be obtained with cement plus 0.56% aluminum (mixed with an equal amount of CaO) and 2% gypsum in slurry with a water–cement ratio of 0.6.