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Production of quick-setting agent

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专利汇可以提供Production of quick-setting agent专利检索,专利查询,专利分析的服务。并且PURPOSE: To produce a quick-setting agent capable of preventing deposition of silicic acid and accelerating setting of mortar or concrete, by blending an acidic aqueous solution with an aqueous solution of sodium silicate to give an acidic aqueous solution of silicic acid previously diluted with water.
CONSTITUTION: For example, (B) and aqueous solution of diluted sodium silicate prepared by adding 30wt% water to 30wt% sodium silicate No.3 is slowly added and blended with (A) a diluted acidic aqueous solution obtained by adding 31.7wt% water to 8.25wt% dilute sulfuric acid to afford an acidic aqueous solution of silicic acid in a given concentration directly usable as a quick-setting agent. The above-mentioned agent is used for tunnels, etc., drilled by using a mud shielding method or earth pressure shielding method.
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