Strength inducer for low-temperature cement-based material

Abstract

The invention discloses a strength inducer for a low-temperature cement-based material. The strength inducer comprises the following components in percentage by mass: 60-70% of a strength rapid development component; 7%-18% of a rheological component; 15%-25% of a micro-expansion component; 0.5%-1% of a coagulation adjusting component; and 1%-10% of an anti-freezing component. The inducer provided by the invention can shorten the setting time of a cement-based material under a low-temperature condition, rapidly develop the strength in a short time, have high early strength, and can realize early demolding and shorten the construction period. The conductive agent promotes the rapid development of the strength of the cement-based material, can avoid the freezing injury phenomenon, and can enhance the waterproof effect and the anti-corrosion effect at the same time. The components are wide in source and low in price, and the use cost is low. The additive is added when a cement-based material is mixed, can play a role after being uniformly stirred, and is convenient to use.

Description

Technical field [0001] The present invention belongs to the technical field of cement admixtures, particularly to a low-temperature strength of cement-based materials inducing agent. Background technique [0002] In recent years, sustained and rapid economic development, more and more major construction units at home and abroad contract railways, highways, housing construction and other projects, the face of the inevitable low temperatures in winter concrete construction. Because cold weather, concrete strength after construction, especially in the early formation of unfavorable strength of concrete at low negative temperature conditions can withstand freeze-thaw damage, salt corrosion damage and external damage, and ultimately its own structure to bring greater harm , serious or even completely destroy the concrete structure. [0003] In order to ensure the quality of concrete works at low temperatures, commonly used methods are: raising the temperature of the concrete raw mater...

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Problems solved by technology

[0004] CN201110049598.X discloses a low-temperature concrete early strength agent. Although the strength of the cement block is 13.5MPa in 12 hours at an ambient temperature of approximately 4°C, it reaches 18.5MPa in 24 hours and 30MPa in three days; The use effect is uncertain under the condition of ℃, and the composition is complex, which is inconvenient to produce

[0005] CN201180009505.9 discloses a cement accelerator, although it has the best solidification and strength formation at a low temperature of 5-15°C, and at the same time still has a sufficiently long processing time at a high temperature of 20-30°C; The effect of use in the case of ℃ is uncertain

[0006] CN201810165759.3 discloses a low-temperature curing agent for cement-based grouting materials for deep-water underwater concrete structures. Although the strength of cement-based grouting materials at a low temperature of 0-5°C is not lower than that of the same mix ratio at 20°C under standard curing Strength, improve the groutability of cement-based grouting materials; but the use effect is uncertain when it is lower than 0 °C, it is only used in grouting materials, and the price of the component product materials is relatively expensive

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