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A cement-based rapid repair material with high early strength and its preparation method

A technology of early strength and repair materials, which is applied in the preparation of cement-based rapid repair materials and in the field of cement-based rapid repair materials, can solve the problems of insufficient early strength and late strength shrinkage, etc., to reduce porosity, compensate for late shrinkage strength, The effect of low porosity

Active Publication Date: 2022-04-26
GANSU ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a cement-based rapid repair material with high early strength that is convenient and easy to prepare on site, which can significantly improve the mechanical properties of the cement-based rapid repair material and overcome the cement-based rapid repair. Repairing the defects of insufficient early strength and late strength shrinkage; the present invention also provides a preparation method of a cement-based rapid repair material with high early strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1; Prepare materials according to the following components: 623.7g of sulfoaluminate cement, 267.3g of ordinary Portland cement, 315g of water, 9.0g of nano silicon dioxide, 0.27g of sodium tripolyphosphate, polycarboxylate superplasticizer 1.74g, borax 1.23g, butyl triphosphate 2.25g, quartz sand 900g.

[0030] Prepare the above-mentioned raw materials into a cement-based rapid repair material that improves early strength according to the following steps:

[0031] a. Dissolve sodium tripolyphosphate in 65wt% water, add nano-silica and stir evenly, then use a high-speed shearing machine to stir for 30 minutes, then ultrasonically disperse the stirred nano-silica solution in an ultrasonic disperser for 45 minutes, Obtain a homogeneously dispersed nano-silica dispersion; b, stir the sulphoaluminate cement, ordinary Portland cement and quartz sand at 300rpm to obtain a main material mixture; c, add nano-silica to the main material mixture Dispersion, remaining ...

Embodiment 2

[0033] Embodiment 2; Prepare raw materials according to the following components: 617.4g of sulphoaluminate cement, 264.6g of ordinary Portland cement, 360g of water, 9g of nanometer silicon dioxide, 9g of nanometer calcium carbonate, 0.54g of sodium tripolyphosphate, polycarboxylate Acid superplasticizer 1.53g, borax 1.19g, butyl triphosphate 2.25g, quartz sand 900g.

[0034] a. Dissolve sodium tripolyphosphate in 65wt% water, add nano-silica and nano-calcium carbonate and stir well, then use high-speed shearing machine to stir for 30min, then put the stirred nano-silica solution in an ultrasonic disperser Ultrasonic dispersion for 45 minutes to obtain a uniformly dispersed nano-dioxide material dispersion; b. Stir the sulphoaluminate cement, ordinary Portland cement and quartz sand at 600 rpm to obtain the main material mixture; c. Add the main material mixture to Nano-silica dispersion, remaining water, polycarboxylate superplasticizer, borax and butyl triphosphate, stirred...

Embodiment 3

[0036]Embodiment 3; Prepare materials according to the following components: 623.7g of sulphoaluminate cement, 267.3g of ordinary Portland cement, 315g of water, 9g of nano silicon dioxide, 0.27g of sodium tripolyphosphate, 1.53 g of polycarboxylate superplasticizer g, sodium gluconate 0.45g, butyl triphosphate 2.25g, quartz sand 900g.

[0037] According to the following steps, the above-mentioned raw materials are prepared into a cement-based rapid repair material that improves the early strength: a, the same as in Example 1; b, the sulphoaluminate cement, ordinary Portland cement and quartz sand are stirred evenly at 450rpm to obtain the main material Mixture; c. Add nano-silica dispersion liquid, remaining water, polycarboxylate superplasticizer, borax and butyl triphosphate to the main material mixture, stir at 600rpm for 1 minute; then increase the speed to 1200rpm, and stir for 2 minutes , and finally pour the mixture into the mold for curing.

[0038] The initial setti...

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Abstract

A high-early-strength cement-based rapid repair material is made of raw materials including the following components by mass: 500-650 parts for sulphoaluminate cement, 200-400 parts for ordinary Portland cement, and 800 parts for quartz sand ~900 parts, 4.5~9.0 parts of nano-silica, 0.25~0.6 parts of dispersant, 1.1~10.8 parts of water reducer, 0.045~0.160 parts of retarder, 0.10~0.25 parts of defoamer, 315~360 parts of water . The invention also provides a preparation method of the cement-based quick repair material with improved early strength. It is convenient and easy to prepare on site. It is compounded with sulphoaluminate cement and Portland cement to ensure the early and late strength. Nanomaterials can significantly improve the microstructure of the composite repair system and significantly improve the early mechanical properties of cement-based materials; The driving quality and driving safety of the repaired road surface; the repairing cost is low and the practicability is strong.

Description

technical field [0001] The invention belongs to the technical field of application of cement-based materials, and in particular relates to a high-early-strength cement-based rapid repair material, and also relates to a preparation method of a high-early-strength cement-based rapid repair material. Background technique [0002] In recent years, with the rapid development of my country's economy and the advancement of urbanization, the transportation network has become more and more developed, resulting in the construction of a large number of road projects in our country. However, due to the rapid growth of traffic volume, the damage of traffic facilities such as roads, bridges and tunnels has become increasingly serious, which has a great impact on driving quality and driving safety. Local damage such as potholes is a common disease on the pavement. If these defects are not repaired in time, the disease will continue to develop and cause more serious results, bringing a lot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B22/00C04B14/06C04B14/062C04B22/16C04B22/0013C04B24/003C04B2103/302C04B14/28C04B24/10
Inventor 朱殿之张广平李国新刘柞宇
Owner GANSU ELECTRIC POWER DESIGN INST
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