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Grouting material for building joints prepared by wet grinding

A technology for grouting materials and connectors, applied in the field of building materials, can solve the problems of high cost of steel grouting materials, easy rusting of steel bars, etc., and achieve the effects of improving grinding performance, reducing steel corrosion, and avoiding steel corrosion.

Active Publication Date: 2021-03-23
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high cost of existing steel bar grouting materials and easy rusting of steel bars in view of the above-mentioned status quo, and aims to provide a grouting material with good fluidity, early strength, high strength, micro-expansion, and strong durability. , grouting material for building connectors that can be applied to prefabricated node connection sleeves

Method used

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  • Grouting material for building joints prepared by wet grinding
  • Grouting material for building joints prepared by wet grinding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Take 35 parts by weight of slag and 20 parts of steel slag, add water according to the water-solid weight ratio of 0.15 to obtain a mixture, put the mixture into a wet mill for collaborative wet grinding, and obtain a mixed slurry material with an average particle size of 2 μm to 7 μm.

[0028] 2) Take 10 parts by weight of carbide slag, 2 parts of desulfurized gypsum, and 5 parts of silica fume and add them to a dry mill for grinding to obtain a mixed powder material with an average particle size of <30 μm;

[0029] 3) Mix the mixed slurry material obtained in step 1) with the mixed powder material obtained in step 2) to obtain a mixture, add 1 part by weight of SAP to the mixture, 80 parts of tailing sand, 85 parts of cement, wood 0.5 part of sulfonic acid water reducing agent, 0.5 part of calcium nitrite-calcium nitrate early strength agent; after adding water, the water-solid weight ratio is 0.15, first stir slowly in the mixer for 2 minutes, and then stir quickly...

Embodiment 2

[0031] 1) Take 36 parts by weight of slag and 21 parts of steel slag, add water according to the water-solid weight ratio of 0.16 to obtain a mixture, put the mixture into a wet mill for collaborative wet grinding, and obtain a mixed slurry material with an average particle size of 2 μm to 7 μm.

[0032] 2) Take 11 parts by weight of carbide slag, 2 parts of desulfurized gypsum, and 6 parts of silica fume and add them to a dry mill for grinding to obtain a mixed powder material with an average particle size of <30 μm;

[0033]3) Mix the mixed slurry material obtained in step 1) with the mixed powder material obtained in step 2) to obtain a mixture, add 1 part by weight of SAP to the mixture, 90 parts of tailings sand, 86 parts of cement, wood 0.6 part of cotton pulp water reducer, 0.6 part of calcium nitrate-urea early strength agent; after adding water according to the water-solid weight ratio of 0.16, stir slowly in the mixer for 2 minutes, and then stir quickly for 2 minutes...

Embodiment 3

[0036] 1) Take 37 parts by weight of slag and 22 parts of steel slag, add water according to the water-solid weight ratio of 0.17 to obtain a mixture, put the mixture into a wet mill to cooperate with wet grinding, and obtain a mixed slurry material with an average particle size of 2 μm to 7 μm.

[0037] 2) Take 13 parts by weight of carbide slag, 2 parts of desulfurized gypsum, and 7 parts of silica fume and add them to a dry mill for grinding to obtain a mixed powder material with an average particle size of <30 μm;

[0038] 3) Mix the mixed slurry material obtained in step 1) with the mixed powder material obtained in step 2) to obtain a mixture, add 2 parts by weight of SAP, 95 parts of tailing sand, 87 parts of cement, and half 0.5 part of cellulose-based water reducer, 0.5 part of calcium nitrate-urea early strength agent; after adding water according to the water-solid weight ratio of 0.15, first stir slowly in the mixer for 2 minutes, and then stir quickly for 2 minutes...

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Abstract

The invention discloses a construction connector grouting material prepared by wet grinding. The preparation method comprises following steps: adding water into mineral slag and steel slag in a wet grinding machine, carrying out wet grinding to obtain a mixed slurry material; grinding calcium carbide residues, desulfurized gypsum, and silica fume in a dry grinding machine to obtain a mixed powderymaterial; mixing the mixed slurry material and the mixed powdery material to obtain a mixture; adding SAP, tailing sand, cement, a water reducer, an early strength agent, and water into the mixture,stirring the mixture for 2 minutes in a blending machine at a low speed at first, then stopping the blending machine for 15 seconds, and stirring the mixture for 2 minutes at a high speed then to obtain the grouting material. A large amount of wastes such as mineral slag, steel slag, calcium carbide residues, desulfurized gypsum, silica fume, and the like, is added, and the wastes are converted into valuable resources. A wet grinding technology is adopted, solid wastes namely mineral slag and steel slag are fully wet-grinded and completely activated; the grouting material is used to connect steel bar sleeves; and the water absorbing material (SAP) can fully absorb water that enters the sleeves and fix the heavy metal ions to prevent the steel bars from being corroded.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a grouting material for building connectors prepared in a wet grinding manner. Background technique [0002] Compared with traditional cast-in-place reinforced concrete structures, prefabricated buildings will vigorously promote the development of construction industrialization due to their advantages such as short construction period, energy saving, low consumption, and environmental protection. At present, my country is in the process of rapid urbanization. By 2020, my country will achieve "all-round well-off". At that time, the urbanization level will reach about 60%, and the urban population will increase by about 300 million. maintain a high standard. In the prefabricated building structure, the grouting material is the key to realize the longitudinal connection, and its performance has a great influence on the integrity and seismic performance of the structural...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B111/70C04B111/26
Inventor 苏英刘雨轩贺行洋杨进王迎斌陈顺张明邱慧琼黄健翔张海峰徐焰
Owner HUBEI UNIV OF TECH
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