论文部分内容阅读
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。
The change law of gelation time of waterglass-calcium carbonate grouting material with the addition of calcium carbonate shows that with the decrease of calcium carbonate addition, sol gelation time increases, but not uniformly, when calcium carbonate Of the amount reduced to a certain amount, the sol gel time will have a sudden increase in the amount of calcium carbonate solution is very sensitive to the gel time is not easy to accurately control. This is because calcium carbonate acts as a basic reactant throughout the reaction system and reacts with H + in the solution system, reducing the concentration of sulfuric acid and increasing the pH of the sol, thereby changing the gelation time of the sol. Select the gel time appropriate colloidal determination of its own strength and the strength of the corresponding sand body obtained two changes in the intensity of the law: the amount of sulfuric acid in a certain condition, generally with the increase of calcium carbonate, pure colloidal strength will be increased accordingly , But added to a certain amount, its intensity no longer increases. The strength of sand body with the change of calcium carbonate is not obvious. Select the optimal proportion of slurry as a new grouting material, and according to the performance of the slurry, the proposed grouting process. For subsequent engineering applications made a good bedding.