A cement concrete early-strength agent and early-strength water reducer

Abstract

The invention relates to a cement concrete early strength agent. The cement concrete early strength agent contains nano calcium carbonate and light calcium powder. Preferably, the cement concrete early strength agent further contains calcium formate and one or more kinds of calcium nitrate. The cement concrete early strength agent comprises, by mass, 20-67 parts of nano calcium carbonate, 33-80 parts of light calcium powder, 0-10 parts of calcium formate and 0-10 parts of calcium nitrate. Compared with an existing early strength agent, the cement concrete early strength agent has the most outstanding advantages that no harmful ions are introduced, the use environment is prevented from being polluted, and the cement concrete early strength agent is nontoxic and harmless; in addition, cement concrete early strength can be improved, and the primary solidification time and final solidification time of cement concrete are shortened. The invention further relates to an early strength and water reduction agent containing the cement concrete early strength agent. The early strength and water reduction agent comprises, by mass, 60%-75% of early strength components and 25%-40% of water reducing components. The early strength and water reduction agent has a good early strength function, a good water reduction function and a good strengthening function, the water reduction rate is high, the early strength of concrete can be remarkably improved, and later strength is not affected.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a cement concrete early-strength agent and an early-strength water reducer. Background technique [0002] Concrete early strength agent refers to the admixture that can improve the early strength of concrete. It is mostly used in winter construction or emergency repair. At present, the more commonly used concrete early strength agents in my country mainly include chloride salts, sulfates, carbonates, and organic compounds. Series, minerals and compound early strength agents, the most commonly used types mainly include: [0003] (1) Chloride salt early strength agents: mainly calcium chloride, sodium chloride, potassium chloride, amine oxide, iron oxide, aluminum oxide, etc. Chloride salt early strength agents have good early strength effects, among which chlorine Calcium early strength has good effect and low cost, so it is the most widely used. [0004] (2) Sulfate-bas...

AI Technical Summary

Problems solved by technology

The application of sulfate-based accelerators is also greatly restricted due to the "flooding" of concrete and the risk of alkali-aggregate reaction hazards.

Some other types of early strength agents, or there are problems such as poor early strength effect, or affect the later strength, or there are raw material sources, difficult production costs, etc.

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