Cement concrete admixture for quickly repairing cement concrete roads

A cement concrete and admixture technology, applied in the field of chemical building materials, can solve the problems of high price and few applications, and achieve the effects of enhancing the anti-cracking ability, improving the impermeability level and reducing the temperature stress.

Inactive Publication Date: 2010-05-19
惠州市富力新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coagulation time of this kind of product is 15 to 30 minutes. Since the repairing process in our country can not be completed within this time, and the price is high, the price of similar foreign products with a dosage of 3% is more than 10,000 yuan per ton. Therefore, there are not many applications in our country

Method used

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  • Cement concrete admixture for quickly repairing cement concrete roads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh each component according to the following weight percentages: 60% of fly ash, 5% of bentonite, 7% of silicon powder, 15% of sodium sulfate, 8% of polycarboxylate water reducer, 3% of citric acid, sodium nitrite 2%, weighed and mixed according to the proportion of the above components and then ground until the specific surface area is greater than 500m 2 / kg.

Embodiment 2

[0031] Weigh each component according to the following weight percentages: 70% of fly ash, 8% of silica fume, 15% of sodium sulfate, 8% of polycarboxylate water reducing agent, 2% of citric acid, 2% of sodium nitrite, according to The proportions of the above components are weighed, mixed and ground until the specific surface area is greater than 500m 2 / kg.

Embodiment 3

[0033] Weigh each component according to the following weight percentage: 80% fly ash, 15% sodium sulfate, 3% polycarboxylate water reducer, 2% citric acid, weigh and mix according to the proportion of the above components and then grind To specific surface area greater than 500m 2 / kg.

[0034] The incorporation of sodium nitrite rust inhibitor can promote the formation of a dense protective film on the surface of the steel bar to prevent the corrosion of the steel bar inside the concrete. It is especially suitable for reinforced concrete. It is of little significance to add a rust inhibitor to the concrete that is not in direct contact with the steel bar; Coagulant is used to regulate concrete setting time, and citric acid of the present invention is retarder, can prolong concrete setting and hardening time appropriately, and early strength agent in the present invention also has the effect of accelerating coagulation in fact, can shorten concrete setting time, and reduce I...

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Abstract

The invention belongs to the technical field of cement concrete admixtures. A cement concrete admixture for quickly repairing cement concrete roads consists of the following components in percentage by weight: 70 to 90 percent of inorganic basis material, 10 to 30 percent of early strength admixture, 5 to 20 percent of water reducing agent, 0 to 20 percent of cement-coagulation agent and 0 to 5 percent of rust inhibitor. The admixture can ensure that the traffic opening time of the maintenance of cement concrete pavements is shortened to 8 hours, has the characteristics of high early strength, no shrinkage at later stages, adjustable hardening and setting time, wide applicable temperature range, low mixing amount and the like, and is mainly applicable to the quick construction of engineering maintenance such as various airport runways, concrete pavements of highways, bridges, culverts, tunnels and the like.

Description

technical field [0001] The patent of the present invention relates to the rapid repair of cement concrete roads, specifically to a cement concrete admixture that meets the technical performance required for rapid repair of cement concrete roads, and is mainly applicable to various airport runways, highway concrete pavements, bridges, culverts, tunnels and other projects The invention relates to rapid construction of maintenance, which belongs to the technical field of chemical building materials. Background technique [0002] The repair technology of cement concrete pavement came into being after the cement concrete pavement was damaged in different degrees. In the repair of cement concrete pavement, the United States. Japan and other countries have modified the epoxy resin commonly used in the repair of concrete structures in industrial and civil buildings, and developed modified epoxy resin materials with high impact resistance suitable for cement concrete pavements. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/36C04B14/04C04B22/14C04B24/06C04B24/12C04B24/24C04B103/10C04B103/30C04B103/44C04B103/61
Inventor 邬桂林徐志芳
Owner 惠州市富力新技术有限公司
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