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A high-fluidity grout suitable for ultra-long prestressed channels and its preparation method

A high-fluidity, pre-stressed technology, used in climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as low fluidity, and achieve the effects of low cost, high fluidity, and a wide range of sources

Active Publication Date: 2018-12-07
WUHAN HUAZHONG UNIV OF SCI & TECH TESTING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the generally low fluidity of the existing channel grouting materials and the above defects or improvement needs for super-long prestressed pipelines, the present invention provides a high-fluidity grouting material suitable for super-long prestressed channels, which can meet the needs of highways. Bridge and culvert construction technical specification requirements, easy construction

Method used

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  • A high-fluidity grout suitable for ultra-long prestressed channels and its preparation method
  • A high-fluidity grout suitable for ultra-long prestressed channels and its preparation method
  • A high-fluidity grout suitable for ultra-long prestressed channels and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A press slurry with high fluidity suitable for ultra-long prestressed channels, the mass parts of each component are as follows:

[0027]

[0028] A method for preparing press slurry includes the following steps:

[0029] 1) Weigh each component according to mass parts;

[0030] 2) Put polycarboxylic acid high-performance water reducing agent, emulsified silicone oil, polyacrylate, redispersible latex powder, ZYG-S plastic expansion agent into the dry powder mixer for pre-mixing for 10 minutes, and then prepare the premix after mixing ;

[0031] 3) Put ordinary Portland cement, limestone powder, first-grade fly ash, CSA expander and the premixed premix in step 2) into the mixer and mix and stir for 10 minutes to obtain the pressure Slurry.

Embodiment 2

[0033] A press slurry with high fluidity suitable for ultra-long prestressed channels, the mass parts of each component are as follows:

[0034]

[0035] A method for preparing press slurry includes the following steps:

[0036] 1) Weigh each component according to mass parts;

[0037] 2) Put polycarboxylic acid high-performance water reducing agent, emulsified silicone oil, polyacrylate, redispersible latex powder, EEA plastic expansion agent into the dry powder mixer for premixing for 5 minutes, and then prepare the premix after mixing;

[0038] 3) Put the ordinary Portland cement, limestone powder, slag powder, HCSA expansion agent and the premixed agent premixed in step 2) into the mixer and mix and stir for 15 minutes to obtain the compressed slurry.

Embodiment 3

[0040] A press slurry with high fluidity suitable for ultra-long prestressed channels, the mass parts of each component are as follows:

[0041]

[0042]

[0043] A method for preparing press slurry includes the following steps:

[0044] 1) Weigh each component according to mass parts;

[0045] 2) Put polycarboxylic acid high-performance water reducing agent, emulsified silicone oil, sodium alginate, redispersible latex powder, EEA plastic expansion agent into the dry powder mixer for premixing for 15 minutes, and then prepare the premix after mixing;

[0046] 3) Put ordinary Portland cement, limestone powder, slag powder, ZY expansion agent, and the premixed premix in step 2) into the mixer and mix and stir for 12 minutes to obtain the compressed slurry.

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Abstract

The invention discloses a high-fluidity duct grouting material suitable for ultra-long pre-stressed ducts, and a preparation method thereof. Raw materials of the duct grouting material comprise, by mass, limestone powder, a mineral admixture, a water reducer, an antifoaming agent, a stabilizer, a plasticity keeper, an expanding agent and a plasticity expanding agent. The method comprises the following steps: 1, respectively weighing all above components according to corresponding mass parts; 2, adding the water reducer, the antifoaming agent, the stabilizer, the plasticity keeper and the plasticity expanding agent to a dry powder mixer, and pre-mixing above added components to obtain a premix; and 3, adding ordinary portland cement, the limestone powder, the mineral admixture, the expanding agent and the premix obtained in step 2 to a mixer, and mixing and stirring added components and the premix to obtain the duct grouting material. The compressive strength and the flexural strength of the duct grouting material used together with water are large, and the high-fluidity, high-performance and low-water segregation duct grouting material can meet construction requirements and quality requirements of duct grouting of ultra-long pre-stressed pipelines in practical engineering.

Description

Technical field [0001] The invention belongs to the field of cement concrete building materials, and more specifically, relates to a pressure slurry with high fluidity suitable for ultra-long prestressed pores. Background technique [0002] Hole grouting is a key process in the construction of prestressed concrete bridges. How to ensure the denseness of prestressed pipe grouting, reduce prestress loss, and prevent corrosion of steel bars is a key technical issue for large bridge construction. In prestressed structures, the quality of grouting materials is an important factor affecting the safety and durability of post-tensioned prestressed structures. [0003] Most of the current pore grouting materials have low fluidity and are easy to cause delamination, which will adversely affect the construction process and grouting quality of pore grouting. Some grouting materials have serious defects in design. , By increasing the water-cement ratio to achieve the effect of high fluidity, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/28C04B18/08C04B24/26C04B24/42
CPCC04B28/04C04B14/28C04B18/08C04B24/42C04B24/26Y02W30/91
Inventor 罗辉袁庆华陈国祥郭昊文周昌栋代明净徐文胜吴克宝
Owner WUHAN HUAZHONG UNIV OF SCI & TECH TESTING TECH CO LTD