Water reducing agent for shrinkage-compensating concrete

Abstract

The invention discloses a water reducing agent for shrinkage-compensating concrete. The water reducing agent comprises the following components in percentage by weight: 70%-80% of naphthalene or homologue, 5%-7% of aliphatic compound, 1%-6% of sodium gluconate, 1%-3% of lauryl sodium sulfate, 0.1%-0.5% of cellulose formaldehyde, 0.1%-0.5% of hydroxypropyl methyl cellulose and the balance of water. The water reducing agent disclosed by the invention has no waste and dust, has no damage to a human body, has no pollution to the environment, and belongs to a green product in the construction industry; simultaneously, the early cracking can be reduced, and harmful cracks of the concrete can be reduced into harmless cracks.

Description

technical field [0001] The invention relates to a shrinkage-compensating water reducer for pumping concrete that can reduce early cracking in construction and application, and reduce harmful cracks of concrete into harmless cracks. Background technique [0002] Concrete cracking is a common phenomenon in concrete applications, and it is also a major problem that is often troubled in building construction. There are many technical measures to reduce or inhibit concrete cracking. Adding shrinkage-compensating water reducer to concrete to reduce concrete shrinkage is one of them. Concrete shrinkage can easily cause concrete cracking. When the shrinkage stress of concrete is greater than the tensile strength of concrete, concrete will crack. [0003] Naphthalene-based water-reducers are commonly used in the market at present. Its biggest advantage is that it has a large water-reducing rate and a good reinforcement effect. However, due to the limitation of its mechanism of actio...

AI Technical Summary

Problems solved by technology

[0003] Naphthalene-based water-reducing agents are commonly used in the market at present. Its biggest advantage is that it has a large water-reducing rate and a good reinforcement effect. However, due to the limitation of its mechanism of action, some existing problems have also brought constant problems to engineering users.

For example: the shrinkage of concrete increases, it is easy to crack, or the slump loss is fast, etc.

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