A rapid initial setting catalyst for cement

Abstract

The present invention discloses a rapid cement initial setting catalyst, which comprises, by mass, 20-29% of ferric sulfate, 12-25% of aluminum powder, 0.1-0.5% of hydrofluoric acid, 3-8% of acetic acid, 10-15% of peanut shell powder, 17-25% of calcium hydroxide, 4-6% of sodium chloride, and 9.5-19.9% of water, preferably, 26% of ferric sulfate, 17% of aluminum powder, 0.2% of hydrofluoric acid, 6% of acetic acid, 13% of peanut shell powder, 19% of calcium hydroxide, 5% of sodium chloride, and 13.8% of water. The rapid cement initial setting catalyst has the following significant and beneficial effects that: (1) a large number of low-cost raw materials are adopted so as to provide a cost advantage; (2) a catalysis effect is significant, and a compressive strength of the cement after final setting is not damaged; (3) the rapid cement initial setting catalyst is non-toxic and harmless, and substances with environmental impacts and damage on human health in the raw materials can be reduced; and (4) the ordinary cement can has a rapid initial setting effect so as to replace the special cement to improve a value of the ordinary cement.

Description

technical field [0001] The invention relates to a catalyst, in particular to a powdery hydraulic inorganic gelling material catalyst. Background technique [0002] Cement is a powdery hydraulic inorganic gelling material widely used as a building material in engineering infrastructure. [0003] Cement is a kind of powder, which can be mixed with water to form a slurry, which can be hardened in air or in water, and can firmly bind sand, stone and other materials together. There are two time indicators to measure cement hardening: one is the initial setting time, and the other is the final setting time. The initial setting time refers to the time from adding water to the cement losing plasticity, and the final setting time refers to the time from adding water to completely losing plasticity. . The country has a standard for the initial setting and final setting of cement: the initial setting time of Portland cement should not be earlier than 45 minutes, and the final setting...

AI Technical Summary

Problems solved by technology

When such substances are used, the durability of the hardened body may be adversely affected by corrosion of steel reinforcement or alkaline aggregate reaction due to the increase in the amount of chloride or alkali in the hardened body.