Aluminum sulfate supersaturated suspended alkali-free liquid accelerator and preparation method thereof

Abstract

The invention belongs to the field of accelerator preparation, and relates to an aluminum sulfate supersaturated suspended alkali-free liquid accelerator and a preparation method thereof. The alkali-free liquid accelerator comprises 60-70 wt% of aluminum sulfate, 1-4 wt% of magnesium fluosilicate, 0.1-0.5 wt% of an organic acid complexing agent, 1-3 wt% of alkylol amine, 0.1-0.3 wt% of superfine sepiolite powder, 0.01-0.05 wt% of polyacrylamide, 0.5-2 wt% of a pH regulator, and the balance of deionized water. The synergistic effects of multiple components can inhibit the hydrolysis reaction ofAl<3+> and enhance the crystallization resistance of sulfate radicals and aluminum ions, and obviously increases the effective aluminum sulfate content of the alkali-free liquid accelerator, the aluminum sulfate proportion reaches up to 60-70%, and the final product is an aluminum sulfate supersaturated solution, so that the addition amount of the alkali liquid accelerator is reduced; the alkali-free liquid accelerator has the advantages of good stability and long storage period, and can be stored at normal temperature stably for 8 months or above.

Description

technical field [0001] The invention relates to the field of quick-setting agent preparation, in particular to a suspension-type non-alkali liquid quick-setting agent with supersaturated aluminum sulfate and a preparation method thereof. Background technique [0002] Accelerator is a coagulation regulator that can accelerate the setting and hardening speed of concrete. Its main function is to accelerate the hydration and hardening of cement and form sufficient strength in a short time to meet the requirements of special construction. Liquid accelerators include alkaline liquid accelerators and alkali-free liquid accelerators. Among them, the alkaline liquid quick-setting agent has a high alkali content, which is easy to cause physical injury to construction personnel, and is easy to induce alkali-aggregate reaction, which will adversely affect the later strength and durability of concrete. Therefore, considering the influence of accelerators on the mechanical properties, co...

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Problems solved by technology

[0005] In order to solve the problems of the alkali-free liquid quick-setting agent in the supersaturated aluminum sulfate solution system, which is easy to crystallize and have poor stability, and achieve good quick-setting effect and early strength requirements, the invention provides a suspension-type supersaturated aluminum sulfate Alkali-free liquid quick-setting agent and preparation method thereof, specifically realized by the following technologies

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