Simple liquid alkali-free setting accelerator and preparation method thereof

Abstract

The invention discloses a simple liquid alkali-free setting accelerator and a preparation method thereof. The setting accelerator comprises the following raw material components in parts by mass: 300-400 parts of tap water, 20-60 parts of mineral powder, 450-550 parts of aluminum sulfate, 20-60 parts of organic amine, 1-10 parts of organic acid, 50-100 parts of fluorine-silicon compound and 5-20 parts of a suspending agent. The mineral powder is one or two of kaolin, bauxite, calcium aluminate and calcium carbonate, and the particle size of the mineral powder is 100-500 meshes; the organic amine is one or more of triisopropanolamine, diethylenetriamine, triethylene tetramine and triethanolamine; the fluorine-silicon compound is one or two of fluosilicic acid, ammonium fluosilicate and zincfluosilicate; and the suspending agent is ultrafine powder of diatomite, bentonite and hydrated magnesium silicate. The invention also provides a preparation method of the accelerator. The inventionrelates to a liquid alkali-free setting accelerator containing polyaluminum sulfate, which can be produced under simple preparation process conditions, and simultaneously confirms that the setting time of the alkali-free setting accelerator meets the national standard.

Description

technical field [0001] The invention relates to an accelerator for concrete, in particular to a simple liquid alkali-free accelerator. The invention belongs to the technical field of building material chemical admixtures. The invention also relates to a preparation method of the liquid alkali-free accelerator. Background technique [0002] In recent years, a large number of infrastructure constructions, such as tunnels, railways and other infrastructure projects, have greatly increased the demand for accelerators. In the concrete or mortar system, the alkali-free quick-setting agent forms calcium aluminate hydrate or calcium sulfoaluminate hydrate and other substances through the large amount of aluminum ions contained in the solution and cement, so that the concrete or mortar can be set and hardened in a short time. At present, the liquid alkali-free accelerators on the market are basically products with aluminum sulfate as the main component, but the solubility of alumin...

AI Technical Summary

Problems solved by technology

[0004] The above technologies have not given specific guidance on how to make the liquid alkali-free accelerator be produced under relatively simple preparation process conditions, and at the same time ensure that the setting time of the alkali-free accelerator meets the national standard