High-fluid low-temperature early-strength cement-based grouting material

Abstract

The invention provides a high flow regime low temperature early-strength cement based grouting material comprising the following components by mass: 100 parts of sand, 60 to 70 parts of cement, 20 to 30 parts of a mineral admixture, 0.3 to 0.7 part of a water reducing agent, 1 to 3 parts of an expansive agent, 0.03 to 0.06 part of a water retaining agent, 0.1 to 0.3 parts of dispersible latex powder, 0.1 to 0.3 parts of a defoaming agent, 0.01 to 0.05 part of an early strength agent, 0.2 to 0.5 part of a retarder, and 0 to 0.2 part of high polymer synthetic fiber. The grouting material applied in low temperature construction conditions only needs routine maintenance and is in no need of auxiliary heat to reach the designed strength, not only saves the cost in manpower and material resources brought by winter construction measures, and but also provides more reliable quality guarantee for engineering construction. The grouting material initial fluidity is greater than or equal to 340mm in a construction environment at the temperature of 5 DEG C, the fluidity in 0.5h is loss-free, the fluidity in 1h is greater than or equal to 300mm, the grouting material is long in construction time; in 5 DEG C routine maintenance condition, the 1d compressive strength is more than or equal to 30MPa, and the 28d compressive strength is more than or equal to 70MPa. When the environmental temperature is dropped to minus temperature, the 1d compressive strength is decreased, and the final strength development is not affected.

Description

technical field [0001] The present invention relates to a cement-based grouting material, more specifically, relates to a cement-based grouting material with high fluidity and low-temperature early-strength properties. Compared with ordinary grouting materials and general winter-applied special grouting materials, the Under the low temperature construction environment, the construction time can be long, and the design strength can be achieved only by conventional maintenance and no auxiliary heating. Background technique [0002] Since the promotion and application of cement-based grouting materials in China in the 1990s, they have been widely used in equipment installation, bolt anchorage, and reinforcement and renovation projects of many large and medium-sized enterprises. Expand to municipal, environmental protection, electric power, ports and other industries. However, the quality problems of cement-based grouting materials under low-temperature construction conditions ...

AI Technical Summary

Problems solved by technology

This consumes a lot of manpower and material resources, resulting in increased construction costs, which not only affects the progress of the project, but also easily leads to the problem that the materials are frozen and cannot be used due to inadequate measures, and the construction quality cannot be reliably guaranteed.

The commercially available special grouting materials for low-temperature construction mainly pursue rapid strength increase to avoid freezing damage, and often cannot guarantee fluidity and fluidity retention time, and the construction time is very short (within 20 minutes, or even shorter). The grouting of anchor bolts can meet the construction requirements in fashion, but when encountering the grouting of large equipment foundations, such a short construction time can not guarantee effective grouting

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