Ultralow temperature high-performance concrete composite anti-freezing agent and preparation technology thereof

Abstract

The invention discloses an ultralow temperature high-performance concrete composite anti-freezing agent and a preparation technology for the ultralow temperature high-performance concrete composite anti-freezing agent. The composite anti-freezing agent comprises the following components in percentage by weight: 30 to 35% of nitrate, 30 to 33% of organic compound, 0.5 to 1% of calcium formate, and the balance of water, wherein the nitrate is calcium nitrate or calcium nitrite, and the organic compound is methanol or ethanol; and the preparation technology comprises the following steps: 1, preheating the nitrate and calcium formate: heating the nitrate and calcium formate to 40 to 70 DEG C, respectively; and 2, uniformly mixing: uniformly mixing the water and the heated nitrate and calcium formate in step 1 based on a design ratio, thus obtaining the composite anti-freezing agent. The preparation technology disclosed by the invention is simple in steps, simple and convenient to operate, has low input cost and a good using effect, and a performance of the ultralow temperature high-performance concrete can be effectively improved.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to an ultra-low temperature high-performance concrete composite antifreeze agent and a preparation process thereof. Background technique [0002] The civil works in front of the station of the new railway Harbin-Qiqihar Passenger Dedicated Line are located in the southwest of Heilongjiang Province. The main climate characteristics of the areas along the line are: the extreme maximum temperature of 39.8°C, the extreme minimum temperature of -42.6°C, and the average temperature of the coldest month is lower than -15°C. The total length of the line is 280.893km. The winter is extremely cold and dry, and the winter rest period is as long as six months. The maximum freezing depth of the soil along the line is 1.89m to 2.14m. According to the current passenger train construction schedule and the requirements of the Ministry of Railways, winter construction is essential, and the construction quality...

AI Technical Summary

Problems solved by technology

At the same time, there is also a lack of a concrete admixture that has simple preparation process steps, low input costs, and can effectively improve the performance of ultra-low temperature high-performance concrete.

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