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Non-fluidity rapid-hardening strong-cohesive-force phosphate cement repairing material and preparation method thereof

A technology of phosphate cement and repair materials, which is applied in the field of non-fluid quick-setting strong cohesion phosphate cement repair materials and its preparation, which can solve the problems of short setting time and achieve convenient transportation, significant economic benefits and social benefits , the effect of increasing the overall stiffness

Active Publication Date: 2017-07-21
沈阳建大泰博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned repair materials all have the characteristics of short setting time, high early strength, dry shrinkage (good volume stability), good performance matching with old concrete, and high bonding strength; however, special for bridge floor or building facade After the location is damaged, the repair material needs to overcome its own gravity and bond well with the original repair surface, have good crack resistance, no fluidity, no shrinkage, fast setting and rapid hardening, etc. So far, there is no repair material The fundamental reason for the repair of this special position is that there is no repair material with ideal performance and reasonable technology to deal with the problems of bridge floor or building facade disease.

Method used

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  • Non-fluidity rapid-hardening strong-cohesive-force phosphate cement repairing material and preparation method thereof
  • Non-fluidity rapid-hardening strong-cohesive-force phosphate cement repairing material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Phosphate cement-based rapid repair material, firstly mix 5% ammonium dihydrogen phosphate, 20% magnesium oxide, 2% fly ash, 30% rubber powder, 6% silica fume, 0.4% polycarboxylic acid Put water reducer, 1.6% sodium silicate, and 0.5% retarder into the mixer and stir evenly, then put 25% of sand into the mixer and mix evenly, then add 8% of water into the mixing drum, add the required Slowly, after all the water is added, keep stirring for 1-2 minutes until a uniform paste with good fluidity is formed, then add 1.5% polypropylene fiber and stir for 30 seconds, then it can be prepared into phosphate cement-based quick repair Material.

[0016] The fly ash test results are shown in Table 1.

[0017] Table 1 Fly ash test results.

[0018]

[0019] 1. Performance test results of phosphate cement-based rapid repair materials.

[0020] 1. Setting time.

[0021] The experimental equipment adopts the instruments and appliances specified in GB1346 "Cement Standard Consist...

Embodiment 2

[0029] Phosphate cement-based rapid repair material, sand 20%, ammonium dihydrogen phosphate 6%, magnesium oxide 18%, fly ash 3%, rubber powder 32%, silica fume 7%, polycarboxylate superplasticizer 0.5%, Sodium silicate 1.5%, polypropylene fiber 2%, retarder 1%, water 9%.

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Abstract

The invention belongs to the technical field of the composite material, and particularly relates to a non-fluidity rapid-hardening strong-cohesive-force phosphate cement repairing material and a preparation method thereof. The non-fluidity rapid-hardening strong-cohesive-force phosphate cement repairing material comprises the following raw materials by weight percentage: 20%-40% of sand, 5%-12% of ammonium dihydrogen phosphate, 10%-25% of magnesium oxide, 2%-8% of coal ash, 30%-60% of rubber powder, 6%-10% of silica fume, 0.35%-0.6% of a polycarboxylate superplasticizer, 1%-5% of sodium silicate, 1.5%-2% of polypropylene fiber, 0.5%-2% of a retarder, and 8%-10% of water. The method is used as the repairing material for the special positions of the baseboard of a bridge or the standing face of buildings which is damaged, and the repairing effect is remarkable.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a non-fluidity quick-setting strong cohesion phosphate cement repair material and a preparation method thereof. Background technique [0002] In recent years, a large number of reinforced concrete structures have sprung up, and various durability diseases of concrete structures have appeared. When the diseases appear on the bridge floor or the building facade, they need to be repaired in time. Due to the particularity of the repaired parts, As the difficulty of repair increases, the repair material must have the characteristics of no fluidity, strong cohesive force, quick setting, no shrinkage, crack resistance, and high early strength. [0003] Many researchers have researched and developed magnesium phosphate cement-based materials. For example, Yang Nan systematically studied water-cement ratio, curing conditions, interface humidity, interface treatment methods, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B111/72C04B111/20
CPCC04B28/344C04B2111/72C04B2111/20C04B2201/05C04B2201/52C04B14/06C04B14/304C04B18/08C04B18/146C04B2103/302C04B2103/65C04B12/04C04B16/0633C04B22/0013C04B28/34C04B2201/20Y02W30/91C04B20/0056C04B18/22C04B22/062C04B24/2647C04B40/0028C04B12/025C04B20/0048C04B28/28C04B2103/20C04B2201/10C04B2201/50
Inventor 俞家欢陈小琳刘永年白晓彤闫林伟金子辉
Owner 沈阳建大泰博科技有限公司
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