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

A high-performance concrete and antifreeze technology, applied in the field of concrete admixtures, can solve the problems of low input cost, achieve low input cost, reasonable design, and convenient implementation

Inactive Publication Date: 2012-11-21
CHINA RAILWAY 20 BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition of the composite antifreeze agent for ultra-low temperature and high performance concrete prepared by the present invention is: 30% to 35% of nitrate, 30% to 33% of organic compound, 0.5% to 1% of calcium formate, and the balance is water; the nitric acid The salt is calcium nitrate or calcium nitrite, and the organic compound is methanol or ethanol.

[0026] In the present embodiment, the nitrate used in the composite antifreeze is calcium nitrate, and the composition of the composite antifreeze is by weight: 30% nitrate, 33% organic compound, 0.75% calcium formate, and the balance is water. The nitrate is calcium nitrate, and the organic compound is methanol or ethanol.

[0027] When actually preparing the composite antifreeze, the dosages of the nitrate, organic compound, calcium formate and water can be adjusted accordingly according to specific needs.

[0028] Such as figure 1 The preparation process of the shown ultra-low temperature high-perfor...

Embodiment 2

[0106] In the present embodiment, the prepared ultra-low temperature high-performance concrete composite antifreeze is different from Example 1 in that: the composition of the composite antifreeze is by weight: 35% of nitrate, 30% of organic compound, 0.5% of calcium formate, and the remaining The amount is water.

[0107] In this example, the preparation process of the ultra-low temperature high-performance concrete composite antifreeze agent used is the same as that in Example 1.

Embodiment 3

[0109] In the present embodiment, the prepared ultra-low temperature high-performance concrete composite antifreeze is different from Example 1 in that: the composition of the composite antifreeze is by weight: 32% of nitrate, 31% of organic compound, 0.8% of calcium formate, and the remaining The amount is water.

[0110] In this example, the preparation process of the ultra-low temperature high-performance concrete composite antifreeze agent used is the same as that in Example 1.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/04
Inventor 廖太昌帖锋斌刘百成魏杏色谷炼平张永鸿薛琪仲维玲赵朝阳马颖仙曹万玲张利民冯艳娜沈亚妮冯英瑞李坦
Owner CHINA RAILWAY 20 BUREAU GRP
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