Concrete early-strength agent and preparation method thereof

Abstract

The invention discloses a concrete early strength agent and a preparation method thereof, belongs to the field of concrete admixtures, and solves the problem that an early strength agent in a low-temperature environment is not obvious in concrete early strength effect. The concrete early strength agent comprises the following components in parts by weight: 20-50 parts of calcium nitrate, 0.1-0.6 part of triethanolamine, 3-8 parts of aluminum sulfate, 20-40 parts of nano silicon dioxide, 5-10 parts of ethylene glycol and 3-8 parts of water-soluble hydroxide. The weight part ratio of the inorganic metal salt to the water-soluble hydroxide is (1-3):1; the water-soluble hydroxide contains 1.3-2 parts of lithium hydroxide; metal cations in the inorganic metal salt are a combination of first ions and magnesium ions or magnesium ions, the first ions being one of ferric ions, ferrous ions and aluminum ions. When the early strength agent is used in a low-temperature environment, a good early strength effect can be achieved.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a concrete early strength agent and a preparation method thereof. Background technique [0002] Concrete refers to the artificial stone made of cement as the main cementitious material, mixed with water, sand, stones, chemical admixtures and mineral admixtures when necessary, mixed in appropriate proportions, uniformly stirred, compacted and cured. Concrete needs to add various admixtures to improve the comprehensive performance of concrete. [0003] Early strength agent is one of the admixtures of concrete, which is mainly used to increase the early cement hydration rate of concrete, thereby increasing the early strength of concrete, and has no significant effect on the later strength of concrete. [0004] The hydration reaction of cement mainly includes: ① the hydration reaction of tricalcium silicate and water to generate calcium silicate hydrate (C-S-H gel) and calcium hyd...

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Problems solved by technology

[0005] During construction in winter, after concrete is added with early strength agent, due to the low ambient temperature, the cement starts to hydrate for a long time, and the hydration reaction is slow, so that the effect of early strength agent is not obvious, and the early strength of concrete after adding early strength agent The expected value cannot be achieved, and the construction progress is obviously slow

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