concrete expansion agent

Abstract

The invention discloses a concrete expanding agent, which comprises the following raw materials by weight: 22-28 parts of pitchstone ore sand, 15-20 parts of di-sec-octyl maleate sodium sulfonate, 12-16 parts of polyisobutenyl succinimide, 24-32 parts of NF-5 type naphthalene series water-reducing agent with high concentration and high efficiency, 5-10 parts of aluminum sulfate, 17-26 parts of CA-100 type air entraining water-reducing agent with high efficiency, 4-8 parts of citric acid, 10-15 parts of vermiculite powder, 10-15 parts of sepiolite fabric, 7-13 parts of nano aluminium titanates fiber, 2-4 parts of 1,4-dithio threitol, 5-10 parts of polyanionic cellulose, 5-10 parts of calcium chloride, 4-6 parts of hepta sodium salt of diethylene triamine penta methane phosphonic acid and 6-9 parts of auxiliary agent. The concrete expanding agent has the advantages of stable expanding performance and good durability, crack resistance, antiseepage performance, water reduction with high efficiency, enhancement performance, low mixing amount, and convenient construction and usage; and alkali-free-aggregate reaction is not generated, strength at early stage and at later stage are not influenced, collapsed slump loss of the concrete is not increased, so that the concrete expanding agent is suitable for waterproof concrete engineering with high crack resistance and antiseepage requirement and waterproof concrete engineering of pumping construction.

Description

technical field [0001] The invention relates to a concrete expansion agent, which belongs to the field of concrete admixtures. Background technique [0002] Concrete admixtures, referred to as admixtures for short, refer to substances that are added to improve the performance of concrete before or during the mixing of concrete. Because admixtures can effectively improve the performance of concrete and have good economic benefits, they have been widely used in many countries, and their application in engineering has attracted more and more attention, becoming an indispensable material in concrete. Among them, the expansion agent is one of the concrete admixtures. It is added to the concrete. When the concrete sets and hardens, the volume expands accordingly, which plays the role of compensating shrinkage, tensioning the steel bars to generate prestress, and fully filling the concrete gap. At present, the expansion agent market is relatively chaotic, and the expansion perform...

AI Technical Summary

Problems solved by technology

At present, the expansion agent market is relatively chaotic, and the expansion performance is unstable, which cannot meet the requirements of high-performance concrete.

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