有机固化水玻璃及其纳米改性技术研究

Research of Organic Curing Sodium Silicate and Nano-modification

水玻璃是一种重要的无机胶凝材料,在岩土体加固及钻孔护壁堵漏等方面应用较为广泛。本文在概述甲酰胺有机固化水玻璃体系的固化机理的基础上,通过室内固结试验重点研究了水加量、温度对浆液凝结时间的影响,并通过固砂体强度试验和模拟固化试验对有机固化水玻璃体系的强度性能进行了评价,同时对纳米碳酸钙改性后的浆液黏度和固砂体强度进行了评价。结果表明:甲酰胺有机固化水玻璃固结完整、强度较高、时间可控,且复杂条件下固结性能稳定;纳米碳酸钙改性后浆液黏度和固砂体强度明显增大。

Sodium silicate is a kind of important inorganic gelled material with wide application in rock-soil reinforcement and borehole plugging-protecting.This paper mainly studies the curing mechanism of formamide organic curing sodium silicate system and the variation rule of coagulation time along with the change of water content and temperature.Through the sand-consolidating strength experiment and simulated sand-consolidation experiment,the paper evaluates the performance of the organic curing system and the viscosity and sand-consolidating strength of slurry modified by nanometer calcium carbonate.The results show that formamide organic curing sodium silicate has complete consolidation,high strength,controllable time and stable consolidation performance in complex conditions;the viscosity and sand-consolidating strength of slurry increases after being modified by nanometer calcium carbonate.