High-early-strength, freeze-proofing and high-performance polycarboxylate water reducer

Abstract

The invention discloses a high-early-strength, freeze-proofing and high-performance polycarboxylate water reducer. The water reducer is prepared from the following components by weight in a preferred range: 10-14 percent of polycarboxylate water reducer, 1-3 percent of sodium gluconate,0.5-1.5 percent of calcium nitrate, 1-3 percent of polyethyleneglycol, 3-5 percent of polyethyleneglycol, 3-5 percent of cupric sulfate, 0.5-1.0 percent of air-entraining agent and the balance of water.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures in building materials, and more specifically relates to an early-strength antifreeze type polycarboxylate water-reducer, and also relates to a preparation method of an early-strength antifreeze type polycarboxylate water-reducer, which is suitable for winter Concrete and ready-mixed mortar of various strength grades are prepared at negative temperature. Background technique [0002] The weather in the vast northern regions of my country is usually relatively cold, and the winter can last for 4-6 months, which has a great impact on concrete engineering construction. In order to ensure the quality and progress of concrete construction, the most economical and effective method is to use concrete admixture - early strength antifreeze. With the development of the construction industry, concrete has gradually achieved high performance (high strength, high workability, high durability). In ...

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Problems solved by technology

[0004] Although the patent CN101186462A and the patent CN101289293A both use the polycarboxylate water reducer component, the alkali content of the early strength antifreeze component, and the chloride ion content are also very low, but the air-entraining component in the antifreeze water reducer introduced by the patent CN101186462A is used alone Or simple compound use, the pore size and uniform distribution of the pores formed in the concrete are not ideal, and no foam stabilizer is used in the air-entraining agent, which will make the bubbles in the concrete unstable and easy to rupture, failing to achieve the expected content The air volume requirement will reduce the antifreeze performance; the antifreeze introduced by the patent CN101289293A has no air-entraining component, but only relies on the water reducing agent to generate air content in the concrete, and the air content is low

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