| 新型酸性水玻璃-碳酸钙注浆材料试验研究 |
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| 引用本文： | 肖尊群,刘宝琛,乔世范,杨小礼,吴国栋.新型酸性水玻璃-碳酸钙注浆材料试验研究[J].岩土力学,2010,31(9):2829-2834. |
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| 作者姓名： | 肖尊群 刘宝琛 乔世范 杨小礼 吴国栋 |
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| 作者单位： | 1. 中南大学,土木建筑学院,长沙410075
2. 山东省国土资源厅,济南,274200 |
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| 基金项目： | 国家自然科学基金，中南大学优博扶植项目，湖南省研究生科研创新项目 |
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| 摘 要： | 研究水玻璃-碳酸钙注浆材料随着碳酸钙加入量的变化胶凝时间的变化规律发现,随着碳酸钙加入量的减少,溶胶胶凝时间随之增加,但并非均匀增加,当碳酸钙的量减少到一定量时,溶胶的胶凝时间会有一个突增点,溶液对碳酸钙的加入量非常敏感,凝胶时间不易准确控制。这是因为碳酸钙在整个反应体系中充当碱性反应剂,与溶液体系中的H+反应,降低了硫酸的浓度,提高了溶胶的pH值,从而改变了溶胶的胶凝时间。选择胶凝时间适宜的胶体测定其本身的强度以及对应的固砂体强度,得出两种强度的变化规律:在硫酸用量一定的条件下,一般随碳酸钙的增加,纯胶体强度会相应增加,但加入到一定量后,其强度不再增加。而固砂体强度随碳酸钙的变化并不明显。选择较优配比浆液作为新型注浆材料,并根据浆液的性能,建议相应的注浆工艺。为后续工程应用作了较好的铺垫。
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| 关 键 词： | 水玻璃 注浆 材料 冻凝 强度 |
| 收稿时间： | 2009-01-16 |
Experimental research on new grouting materials of acidic water glass-calcium carbonate |
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| XIAO Zun-qun,LIU Bao-chen,QIAO Shi-fan,YANG Xiao-li,WU Guo-dong.Experimental research on new grouting materials of acidic water glass-calcium carbonate[J].Rock and Soil Mechanics,2010,31(9):2829-2834. |
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| Authors: | XIAO Zun-qun LIU Bao-chen QIAO Shi-fan YANG Xiao-li WU Guo-dong |
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| Institution: | 1. School of Civil and Architectural Engineering, Central South University, Changsha 410075, China; 2. Shandong Provincial Department of Land and Resources, Jinan 274200, China |
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| Abstract: | The change law of congealing time that water glass—calcium carbonic acid grouting material corresponding with the change of calcium carbonic acid is researched. The congealing time of sol increases as the reduction of quality of calcium carbonic acid. However it does not increase evenly with reduction of calcium carbonic acid. There is up-rush point of congealing time when the calcium carbonic acid is reduced to a certain amount. It is difficult to control congealing time accurately, as solution has very sensitive to putting into amount of the calcium carbonic acid. Calcium carbonic acid as alkaline reaction in the whole reaction system, react by H+ of system with solution. The pH value of sol is raised and vitriolic concentration is reduced. So the sol congealing time is changed. The suitable congealing time of colloid is chosen to test their own intensity and corresponding firm sand intensity. The change laws of two kinds of intensity is obtained Under the condition of fixedness of vitriolic consumption. The pure colloidal intensity increases as the increase of the calcium carbonic acid generally. But after adding to a certain amount, its intensity no longer increases. It is not obvious that the intensity of firm-sand body varies with calcium carbonic acid. The slurry of more excellent proportion is chosen to be new grouting material, and according to the performance of the slurry, the corresponding grouting craft is proposed. It has done better preparative work for the subsequent project application. |
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| Keywords: | water glass grouting material congealing intensity |
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