Concrete early strength agent

Abstract

The invention discloses a concrete early strength agent, which is composed of the following components in parts by weight: 100 to 120 parts of potassium nitrate, 100 to 150 parts of white vitriol, 50 to 80 parts of sodium sulfide, 80 to 100 parts of potassium nitrate, 20 to 30 parts of gluconic acid, 15 to 20 parts of sodium lignosulfonate, 10 to 30 parts of active carbon, 30 to 50 parts of calcium oxide, 20 to 50 parts of titanium dioxide, 10 to 25 parts of coal cinder, 20 to 25 parts of high-alumina fly ash, and 30 to 35 parts of aluminum oxide. The concrete early strength agent has the characteristics of strong adaptability, low cost, and good early-strength effect, can replace an antifreeze agent in a temperature range of -5 to 5 DEG C, has the functions of promoting early strength, reducing water, preventing freezing, and enhancing the plasticity, does not contain any chlorine ion, does not corrode the steel bar, can be applied to silicate cement, and has a prominent enhancing and modifying effect on slag cement.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a concrete early strength agent. Background technique [0002] Concrete early strength agent refers to the admixture that can improve the early strength of concrete and has no significant effect on the later strength. The main function of early strength agent is to accelerate the hydration speed of cement and promote the development of early strength in concrete. [0003] Concrete early strength agent is one of the earliest admixture varieties used in the history of admixture development. So far, people have developed a variety of early-strength admixtures other than chloride salts and sulfates, such as nitrite, chromate, etc., and organic early-strength agents, such as triethanolamine, calcium formate, urea, etc. And on the basis of the early strength agent, a variety of composite admixtures are produced and applied, such as early strength water reducer, early stren...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional chloride-based concrete early strength agent is easy to cause corrosion of steel bars, and in the concrete of steel bars, the amount of CaCl2 should not exceed 1% of the cement amount.