Reinforced cement-based grouting material

A technology of cement-based and grouting materials, which is applied in the field of reinforced cement-based grouting materials and reinforcement grouting materials. The effect of defects

Inactive Publication Date: 2018-09-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In projects such as structural reinforcement and joint connection of prefabricated building components, cement-based grouting materials are generally used to bond old concrete, but there are problems such as low bonding interface strength and easy cracks.

Method used

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  • Reinforced cement-based grouting material
  • Reinforced cement-based grouting material
  • Reinforced cement-based grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment discloses a reinforced cement-based grouting material, which includes the following components in parts by weight, 30.8 parts of Portland cement with a model of 52.5R, 1 part of aluminate cement, and α-hemihydrate gypsum 1.5 parts, 53 parts of aggregate, 1.5 parts of silica fume, 0.15 parts of polycarboxylate superplasticizer, 12 parts of water, 0.05 parts of sodium gluconate.

[0029] Among them, aluminate cement requires that the content of alumina accounts for 45% to 55%, and the effect is the best at 50%; the content of silica in silica fume is greater than 90%; the polycarboxylate water reducer purchased by Sika company, the entire The water reduction rate in the process is 25% to 30%.

[0030] Aggregate is river sand composed of multi-grain grades. According to parts by weight, the aggregate includes the following components,

[0031] 8 to 10 parts of sand with a particle size of 0.3mm to 0.6mm

[0032] 15 to 20 parts of sand with a particle size...

Embodiment 2

[0037] This embodiment discloses a reinforced cement-based grouting material, which differs from Embodiment 1 only in that the proportions of the components are different. The specific proportions of the components in this embodiment are as follows:

[0038] Portland cement 52.5R 29.87 parts, aluminate cement 1.5 parts, α-hemihydrate gypsum 2 parts, aggregate 53 parts, silica fume 1.2 parts, polycarboxylate superplasticizer 0.13 parts, water 12 parts, Sodium gluconate 0.05 parts. The content of alumina in aluminate cement is required to account for 45% to 55%, and the effect is the best at 50%; the content of silicon dioxide in silica fume is greater than 90%; the polycarboxylate water reducer purchased by Sika company, during the whole process The water reduction rate is 25% to 30%.

[0039] Aggregate is river sand composed of multi-grain grades. According to parts by weight, the aggregate includes the following components,

[0040] 8 to 10 parts of sand with a particle siz...

Embodiment 3

[0044] This embodiment discloses a reinforced cement-based grouting material, which differs from Embodiment 1 only in that the proportions of the components are different. The specific proportions of the components in this embodiment are as follows:

[0045] Portland cement 52.5R 30.4 parts, aluminate cement 1.0 parts, α-hemihydrate gypsum 1.5 parts, aggregate 53 parts, silica fume 1.9 parts, polycarboxylate superplasticizer 0.15 parts, water 12 parts, Sodium gluconate 0.05 parts. The content of alumina in aluminate cement is required to account for 45% to 55%, and the effect is the best at 50%; the content of silicon dioxide in silica fume is greater than 90%; the polycarboxylate water reducer purchased by Sika company, during the whole process The water reduction rate is 25% to 30%.

[0046] Aggregate is river sand composed of multi-grain grades. According to parts by weight, the aggregate includes the following components,

[0047] 8 to 10 parts of sand with a particle si...

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Abstract

The invention discloses a reinforced cement-based grouting material. The reinforced cement-based grouting material comprises the following components in parts by weight: 30 to 50 parts of Portland cement, 0.9 to 1.5 parts of aluminate cement, 1 to 2 parts of gypsum, 50 to 55 parts of aggregate, 1 to 2 parts of silica fume, 0.1 to 0.2 part of a water reducer, 10 to 14 parts of water and 0.02 to 0.05 part of a retarder. The cement-based grouting material can be well adhered to old concrete; the shear strength and the tensile strength of an adhesion interface can be increased by more than 50 percent; the problems that the adhesion interface has low strength and is liable to crack when the existing common cement-based grouting material is adhered to the old concrete are solved; after use, themechanical property of concrete buildings can be improved; and the reinforced cement-based grouting material is particularly suitable for being applied to large-scale equipment mounting, assembling type component splicing and crack repair engineering.

Description

technical field [0001] The invention relates to a reinforcing grouting material, in particular to a reinforcing cement-based grouting material, which is mainly used for large-scale equipment installation, assembled component splicing, and crack repairing projects, and belongs to the field of building materials. Background technique [0002] In projects such as structural reinforcement and joint connection of prefabricated building components, cement-based grouting materials are generally used to bond old concrete, but there are problems such as low bonding interface strength and easy cracks. The failure zone of grout and old concrete bonding is a unique interfacial bonding transition zone composed of grouting material, bonding interface, and old concrete. The success of bonding depends on the mechanical properties and microstructure of this transition zone. . There are many potential defects in the interface transition zone, and the initial strain and stress in the zone are...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/72C04B111/70
CPCC04B28/06C04B2111/70C04B2111/72C04B2201/50C04B7/02C04B22/143C04B18/146C04B14/068C04B2103/302C04B24/10C04B22/002
Inventor 李志华吴吉昊张聪乔庆浩
Owner JIANGNAN UNIV
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