Water reduction agent special for concrete prefabricated component

Abstract

The invention relates to a water reduction agent special for a concrete prefabricated component. The water reduction agent is prepared from the following components: a water reduction agent mother solution, an anti-cracking agent, methacrylol polyoxyethylene ether, sodium gluconate, triterpenoid saponin, a surface treatment agent, a defoaming agent and water. By adopting the water reduction agentspecial for the concrete prefabricated component, the water reduction rate when the concrete prefabricated component is produced is greater than or equal to 40 percent, the condensation time is 60 minto 120 min, the strength in one day is greater than or equal to 140 percent, the strength in three days is greater than or equal to 150 percent, the strength in seven days is greater than or equal to150 percent, the strength in 28 days is greater than or equal to 130 percent, and the shrinkage cracking probability of the concrete is decreased by 35 percent or more; and the surface finish degreeis increased by 40 percent or more.

Description

Technical field [0001] The invention relates to a cement water reducer, in particular to a special water reducer for concrete precast components. Background technique [0002] Prefabricated concrete components refer to prefabricated concrete components that have been fabricated before installation at the construction site. Commonly used are prefabricated concrete floor slabs, concrete box beams for bridges, prefabricated concrete roof truss beams for industrial plants, culvert frame structures, and foundation treatment. Precast concrete piles, etc. [0003] Water reducing agent is a concrete admixture that can reduce the water consumption for mixing while maintaining the slump of concrete unchanged. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer and so on. After adding the concrete mixture, it can disperse the cement particles, which can improve its workability, reduce the unit water consumption, improve the fluidity of the...

AI Technical Summary

Problems solved by technology

[0004] Naphthalene and polycarboxylate superplasticizers are most commonly used in the market now. Polycarboxylate high-efficiency water reducers are more convenient, safe and efficient to use, but cement and polycarboxylate may occur in the construction and production of prefabricated concrete components. Concrete is difficult to unload from the mixer due to serious incompatibility; the slump loss of concrete prefabricated components simply mixed with naphthalene-based water-reducers is relatively fast, and the adaptability of naphthalene-based water-reducers to certain cements Poor sex

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