Preparation method of early strength prestress duct grouting material

A pore grouting and prestressing technology, applied in the field of concrete slurry preparation, can solve the problems of insufficient structural strength, potential safety hazards, poor fluidity, etc., and achieve the effects of excellent early strength performance, reduced production cost, and excellent micro-expansion.

Active Publication Date: 2017-06-27
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned prestressed tunnel pressure grout may have poor fluidity, resulting in delamination, or shrinkage after construction and solidification due to material batching problems, resulting in insufficient structural strength of the concrete after solidification , after a period of time, cracks will occur, leading to safety hazards, so there is room for improvement in ingredients

Method used

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  • Preparation method of early strength prestress duct grouting material
  • Preparation method of early strength prestress duct grouting material
  • Preparation method of early strength prestress duct grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Select 725.3 parts of cement, 200 parts of waste glass powder, 50 parts of pozzolan, 1.5 parts of polycarboxylate superplasticizer, 3 parts of Wenlun rubber, 20 parts of UEA micro-expansion agent, 0.2 part of organic silicon defoamer, water The glue ratio is 0.28. Place waste glass powder raw materials and volcanic ash in a wet mill, add 125 parts of water, and ball mill after 3 hours of wet milling until the median particle size is less than 1 micron, then add cement and remaining water to the wet mill for wet milling and stirring, then add micro-expansion After mixing the agent, Wenlun glue, water reducer and defoamer, they can be released and used. The time from adding cement to discharging does not exceed 90s.

[0024]

Embodiment 2

[0025] Embodiment 2: Select 532.5 parts of cement, 300 parts of waste glass powder, 100 parts of pozzolan, 2.5 parts of polycarboxylate superplasticizer, 4 parts of Wenlun rubber, 60 parts of UEA micro-expansion agent, 1 part of organic silicon defoamer, water The glue ratio is 0.28. Place waste glass powder raw materials and volcanic ash in a wet mill, add 200 parts of water, and wet mill for 3 hours, then add cement and the remaining water to the wet mill and stir, then add micro-expansion agent, construction-grade warm wheel glue, The water agent and defoamer can be released for use after stirring well, and the time from adding cement to discharging does not exceed 90s.

[0026]

Embodiment 3

[0027] Embodiment three: choose 628.9 parts of cement, 250 parts of waste glass powder, 75 parts of volcanic ash, 2 parts of polycarboxylate superplasticizer, 3.5 parts of Wenlun rubber, 40 parts of UEA micro-expansion agent, 0.6 part of organic silicon defoamer, water The glue ratio is 0.28. Place waste glass powder raw materials and volcanic ash in a wet mill, add 162.5 parts of water, and after wet milling for 3 hours, add cement and the remaining water to the wet mill in sequence, then add micro-expansion agent, construction-grade temperature wheel glue, reducing The water agent and defoamer can be released for use after stirring well, and the time from adding cement to discharging does not exceed 90s.

[0028]

[0029]

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PUM

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Abstract

The invention discloses a preparation method of an early strength prestress duct grouting material and solves the problems that in the existing grouting materials, the fluidity is poor, laying and cracking occur and the like. The technical scheme is that the early strength prestress duct grouting material comprises the composites of 0.15%-0.25% of water reducer, 20%-30% of cullet, 5%-10% of cinerite, 0.3%-0.4% of Welangum, 2%-6% of micro-expanding agent, 0.02%-0.1% of defoamer and 53.25%-72.53% of cement; the water-binder ratio is 0.28; the preparation method comprises the steps that the cullet and the cinerite are put into a wet mill, the water-material weight ratio is 1:2, ball-milling is performed until the median size is smaller than 1 micrometer, then cement and surplus water are put into the wet mill sequentially, the architecture grade Welangum, the micro-expanding agent, the defoamer and the water reducer are added and stirred uniformly after wet-milling stirring, and the early strength prestress duct grouting material is obtained. According to the preparation method of the early strength prestress duct grouting material, the method is easy, the production cost is low, the prepared grouting material has ultrafast fluidity, can prevent layering, is free of shrinkage and has micro-expansion and early strength performance.

Description

technical field [0001] The invention relates to a method for preparing concrete slurry, in particular to a method for preparing early-strength prestressed tunnel pressure slurry. Background technique [0002] As a renewable and reusable resource, waste glass can be added to the batch of the same type of glass to play a fluxing role, shorten the melting time of the glass, reduce production costs, and improve economic benefits. In addition, waste glass can also replace flux and some clay mineral components in the production of clay bricks, as a filler for asphalt road pavement, as an admixture and aggregate for concrete, and as a glass mosaic, glass-ceramic plate, building brick, foam glass , glass wool, glass beads and other production raw materials. . [0003] Prestressed concrete is widely used in bridge structures because of its unique economic and technical advantages. Grouting of tunnels is a key process of prestressed concrete construction. Its main functions are: fir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B40/00C04B14/22C04B14/14C04B111/26
CPCC04B28/00C04B40/0028C04B2111/26C04B2201/05C04B2201/52C04B14/22C04B14/14C04B24/42C04B2103/302C04B24/38C04B2103/0068
Inventor 苏英卢敏贺行洋王迎斌柯凯曾三海李颜娟兰蒙储劲松秦景燕江波
Owner HUBEI UNIV OF TECH
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