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Early strength grouting material

A grouting material and aggregate technology, which is applied in the fields of engineering materials and grouting materials, can solve the problems of difficult self-leveling, low early strength, setting and hardening time greater than 5 hours, etc., and achieves the effect of improving construction efficiency and strong cohesion.

Inactive Publication Date: 2010-07-28
CNBM ZHONGYAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing grouting materials are mainly composed of ordinary portland cement, aggregate and additives. The disadvantages are that the setting time is slow, and the setting and hardening time is more than 5 hours; the early strength is low, and the strength can only reach 20MPa in one day; the fluidity is poor, and the diffusion degree is 300mm About, more than 50cm distance is difficult to self-leveling
Therefore, it is difficult to meet the higher performance requirements for grouting materials

Method used

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  • Early strength grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Select 50 kg of sulfur-aluminum cement, 46 kg of sand (G1, G2, G3 are mixed according to 30, 60, and 10 parts), 4 kg of natural anhydrite powder, 0.3 kg of water reducing agent sulfonated melamine formaldehyde resin, coagulant lithium hydroxide 0.07 kg, 0.02 kg of retarder citric acid, 0.02 kg of water retaining agent methyl cellulose. First, mix 5 kg of cement with water reducing agent, coagulant accelerator and coagulant retarder evenly with a small mixer, then put all the materials into the mixer and mix them evenly before packing them into bags. Add 16% water during repairing construction, and use it after stirring for 3 minutes with a forced mixer.

Embodiment 2

[0038]Select 44.5 kg of sulfur-aluminum cement, 50 kg of sand (G1, G2, G3 are mixed according to 30, 50, and 20 parts), 5.5 kg of natural mixed gypsum powder, 0.6 kg of polycarboxylic acid with a gas content of less than 3% in the water reducing agent, coagulation accelerator Lithium carbonate 0.05 kg, retarder boric acid 0.03 kg, water retention agent hydroxypropyl methylcellulose 0.01 kg. First, mix 5 kg of cement with water reducing agent, coagulant accelerator, coagulant retarder and water retaining agent with a small mixer, then put all the materials into the mixer and mix them evenly before packing them into bags. When grouting bridge bearings, add 16% water and stir with a forced mixer for 3 minutes before use.

Embodiment 3

[0040] Select 40 kg of sulfur-aluminum cement, 55 kg of sand (G1, G2, G3 are mixed according to 27, 55, and 18 parts), 5 kg of dihydrate gypsum powder, water reducing agent (sulfonated melamine formaldehyde resin and polystyrene with a gas content of less than 3%) Carboxylic acid superplasticizer is compounded at 1: 1, and other ratios are also used for compounding) 0.4 kg, coagulant lithium carbonate 0.06 kg, retarder boric acid 0.02 kg, water retaining agent lignocellulose 0.01. First, mix 5 kg of cement with water reducing agent, coagulant accelerator, coagulant retarder and water retaining agent with a small mixer, then put all the materials into the mixer and mix them evenly before packing them into bags. During the grouting construction of highway and bridge joint joints, add 16% water, stir with a forced mixer for 3 minutes, and then use it.

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Abstract

The invention discloses an early strength grouting material which belongs to the field of engineering material, and is formed by the following mixed compositions by weight portions: 38-50 portions of special cement, 46-55 portions of skeletal material, 4-10 portions of gypsum, 0.3-0.6 portion of water reducing agent, 0.05-0.06 portion of coagulant agent, 0.02-0.03 portion of delayed coagulant, and 0.01-0.02 portion of water retention agent. The fluidity of the early strength grouting material of the invention is more than 350 mm at the beginning and is more than 300 mm after 10-30 minutes, the compressive strength is more than 20 Mpa after 30 minutes to 2 hours; the early strength grouting material has good cohesive force, has no cracks and has stable strength, suitable for emergency repairing and grouting in the joints of roads and bridges, rapid grouting in the supports of high-speed railways and bridges, emergency repairing of the concrete pavement in airports, and other special engineering.

Description

technical field [0001] The invention relates to engineering materials, in particular to a grouting material, in particular to a special engineering material used for road surface repair, hole filling, equipment and steel structure foundation grouting for rush repair, rush construction and rapid construction. Background technique [0002] With the rapid development of my country's infrastructure construction, there are more and more demands for emergency repair, rush construction, and rapid construction of concrete projects, and the requirements for material properties are also getting higher and higher. The emergency repair grouting of highway and bridge joints, the rapid grouting of high-speed railway bridge bearings, and the emergency repair of airport concrete pavement all require simple construction, early strength and high strength. The performance of the grouting material directly affects the construction progress, and the speed of the construction progress directly af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/06C04B111/70
Inventor 齐冬有侯维红栗谷堆阎柳刚郑国华赵海洋邹琼慧邵中军刘绪光刘元新
Owner CNBM ZHONGYAN TECH
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