High performance gypsum concrete material used for engineering fast first aid repaining

A gypsum concrete, high-performance technology, used in climate sustainability, sustainable waste treatment, solid waste management, etc. question

Inactive Publication Date: 2004-12-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) At present, there is still a lack of dry mixing and rapid repair concrete technology, so rapid repair cannot be achieved
[0004] (2) The existing rapid repair technology using polyurethane and other resins has high cost, requires two components when preparing, and requires a special curing agent for curing, and the raw material of polyurethane is flammable
Not conducive to large-scale application
[0005] (3) The commonly used repairing concrete technology needs to be vibrated or rolled, and the construction technology is difficult
[0006] (4) The method of pouring shaped concrete requires long-term maintenance and cannot achieve the goal of opening as soon as possible
[0007] (5) The use of asphalt concrete requires hot frying and mixing, and the frying and mixing equipment is complicated and the investment is huge
The frying and mixing equipment cannot be moved, and the long-distance transportation of asphalt mixture, on-site mechanical laying and rolling are difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: 20 to 65 parts of gypsum; 55 to 85 parts of high-quality dry river sand with mud content ≤ 1.0%; 85 to 140 parts of granular stones ≥ 15 mm in size; 0 to 18 parts of fly ash; composite admixture 0.6 to 2 parts. The above dosage can be mixed into 1 cubic meter of plastic concrete. The dry powder admixture is mixed with high-strength gypsum to form a composite cementitious material. The composite cementitious material is first added to the mixer, and then the above-mentioned sieved and dried sand is added and mixed for 3 minutes. The fly ash adopts Class II dry ash discharge. Finally, add stones, stir for 2 minutes, dry mix into a mixture and pack it into a bag. Then put the whole bag of material directly into the water pit, and cut it slightly. There is no special requirement on the water content in the pit, the volume of the pit in this embodiment is about 3m 3 , the water content in the pit is about 0.5m 3 .

Embodiment 2

[0021] Example 2: 38 parts of gypsum; 75 parts of sand; 88 parts of stone; 10 parts of fly ash; 14.4 parts of composite admixture. According to the method of embodiment 1, dry mix into a mixture. For this embodiment, add 16.8 parts of mixing water, stir for 3-5 minutes to make plastic concrete, and pour it on the repaired part.

Embodiment 3

[0022] Example 3: 38 parts of gypsum; 75 parts of sand; 88 parts of stone; 10 parts of fly ash; 14.4 parts of composite admixture. First mix the above-mentioned gypsum, sand and fly ash, add 16.8 parts of mixing water and mix well, then add 14.4 parts of compound admixture and mix well, finally add stones, mix to make self-leveling concrete, and pour it on the repaired part.

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Abstract

A high-performance gypsum concrete for the emergency repairing of engineering, such as runway of airport and highway, is prepared from gypsum sand, cobble, flyash and composite additive through proportionally mixing. Its advantage is high early strength (10-20 MPa within 30-60 min).

Description

technical field [0001] The invention relates to a civil engineering concrete material, in particular to the preparation of a concrete material which can be used for quick repair of various engineering road surfaces. Background technique [0002] At present, due to the progress of civil engineering design, materials and construction technology, the quality of projects has been continuously improved, and the service life of building materials has been continuously extended. Especially with the rapid development of modern science and technology, road traffic has become one of the important focuses of the world. Due to various reasons such as natural disasters, wars, airport accidents or traffic accidents, roads, squares and other civil engineering construction facilities have been damaged. It is well known that the timely repair of these facilities is of great significance to politics, economy, military and even life. At present, according to th...

Claims

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Application Information

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IPC IPC(8): C04B14/06C04B18/06C04B28/14
CPCC04B2111/0075C04B2111/72C04B2201/05C04B28/14Y02W30/91C04B14/06C04B18/08
Inventor 李志国张爱华阎春霞王家瑛刘劲松张林峰
Owner TIANJIN UNIV
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