Cement-based cementing material suitable for environment of-10 DEG C to-30 DEG C and construction method and application of cement-based cementing material

Abstract

The invention mainly aims to provide a cement-based cementing material suitable for an environment of-10 DEG C to-30 DEG C and a construction method and application of the cement-based cementing material. The material comprises the following components in parts by mass: 0-5 parts of anhydrite; 15-25 parts of sulphoaluminate cement; 0.1-0.3 part of a water reducing agent; 0-0.3 part of a water-retaining agent; 0.1-0.3 part of a retarder; 0.1-0.3 part of an early strength agent; 55-75 parts of sand; 1-3 parts of an antifreezing agent and 7-12 parts of water. The technical problem to be solved isthat the existing cement-based cementing material cannot be subjected to cold material on-site heating-free mixing and construction under the negative temperature condition. The use requirement in anextreme negative temperature environment can be met by controlling the freezing point of a mixing solution, promoting cement hydration and other technical measures and adjusting the component proportion of the cementing material, and the purposes of direct mixing and pouring of cold materials in a low-temperature environment of-10 DEG C to-30 DEG C and heating-free maintenance are achieved; the cement-based cementing material does not need additional special curing measures such as heating curing and is high in strength development speed and low in cost and does not influence engineering progress and is more practical.

Description

technical field [0001] The invention belongs to the technical field of building material manufacturing, and in particular relates to a cement-based cementitious material suitable for an environment of -10°C to -30°C, a construction method and application thereof. Background technique [0002] Negative temperature construction in winter is becoming more and more common, and with the proposal of my country's polar strategy, it is extremely urgent to develop cement-based cementitious materials that meet the requirements of negative temperature environments. [0003] Relevant studies have shown that the hydration reaction of sulfoaluminate cement can still proceed at negative temperatures, and the types of hydration products will not change. For example, in an environment of -5°C, sulfoaluminate cement can be continuously hydrated, and its hydration product is still ettringite, and the addition of nitrite antifreeze can significantly improve its strength, and the 28-day compress...

AI Technical Summary

Problems solved by technology

The technical problem to be solved is to address the defect that the existing cement-based cementitious materials cannot be mixed and constructed without heating on site under negative temperature conditions. By controlling the freezing point of the mixing solution and promoting cement hydration, etc., And adjust the composition ratio of the cementitious material so that it can meet the use requirements in the extreme negative temperature environment, and realize the purpose of direct mixing and pouring of cold materials in the low temperature environment of -10 ~ -30 ° C without heating and curing; the said The cement-based cementitious material does not require additional special curing measures such as heating and curing. Its strength develops quickly, its cost is low, and it does not affect the progress of the project, so it is more suitable for practical use.

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