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Ultrahigh-performance cement-based abrasion-resistant material

An ultra-high performance, anti-abrasion technology, applied in the field of concrete, can solve problems such as affecting the normal operation of the project, expensive repair costs, and surface concrete erosion.

Inactive Publication Date: 2016-01-27
浙江宏日泰耐克新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of high-speed water flow, the large particle-sized moving sand and small-sized suspended sediment will cause damage to hydraulic structures such as impact, friction and cutting, resulting in large-scale denudation of the surface concrete, which not only requires expensive Repair costs, and directly affect the normal operation of the project

Method used

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  • Ultrahigh-performance cement-based abrasion-resistant material

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Ultra-high-performance cement-based anti-abrasion material, including cementitious material, fine aggregate, water and water reducer, the cement is P·I cement with a strength grade of 52.5, and the mineral admixture is silica fume and powder Coal ash, the fine aggregate used is natural ultra-fine sand with a fineness modulus of 1.4.

[0062] The ratio fraction of cement, silica fume, fly ash and fine aggregate is numerically analyzed and calculated through the ideal accumulation curve and its particle size cumulative distribution curve;

[0063] 1) the ideal stacking curve formula is:

[0064] P sd =A+(100-A)·(d / D max ) π / 2e ;

[0065] Among them, P sd is the percentage of particles passing through the sieve, A is an empirical constant, d is the diameter of the sieve, D max is the maximum particle size of the particle;

[0066] The value of the empirical constant A is determined by the formula according to the consistency requirements of ultra-high performance ce...

Embodiment 2

[0091]Ultra-high-performance cement-based anti-abrasion material, including cementitious material, fine aggregate, water, water reducer and defoamer, the cement is P·II cement with a strength grade of 52.5, and the mineral admixture is For silica fume and mineral powder, the fine aggregates used are ultra-fine natural sand with a fineness modulus of 1.4 and ultra-fine artificial sand with a fineness modulus of 1.2. The proportions of each component of the cementitious material and the aggregate are calculated by the calculation method of Example 1 to obtain X c =0.598, X sf =0.091, X bs =0.086, X s1 = 0.108 and X s2 = 0.117. The water-to-cement ratio W / B=0.131, the admixture uses polycarboxylate superplasticizer solution, the dosage is 1.2% of the mass of the gelling material, and the silicone defoamer is used, and the dosage is 0.1% of the mass of the gelling material.

[0092] The volume percentage of main materials used in ultra-high-performance cement-based anti-abras...

Embodiment 3

[0104] Ultra-high-performance cement-based anti-abrasion material, including cementitious material, fine aggregate, fiber, water, water reducing agent, shrinkage reducing agent, the cement is P·II cement with a strength grade of 62.5, and the mineral admixture It is silica fume, fly ash and slag powder. The fine aggregate used is 1# quartz sand of 10-20 mesh, 2# quartz sand of 20-40 mesh and 3# quartz sand of 40-80 mesh. The proportions of each component of the cementitious material and the aggregate are calculated by the calculation method of Example 1 to obtain X c =0.139, X sf = 0.063, Xfa = 0.063, X bs =0.049, X s1 =2.141, X s2 = 1.147 and X s3 = 0.918. The water-binder ratio W / B=0.269, the fiber uses polyvinyl alcohol fibers with a diameter of 40 μm and a length of 12 mm, and the volume dosage is 0.1%, and the water-reducing agent uses a polycarboxylate water-reducer solution, and the dosage is 1.2% of the mass of the gelling material %, polyalcohol shrinkage reduce...

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Abstract

The invention relates to an ultrahigh-performance cement-based abrasion-resistant material, which has the features that the material can be used for performing surface coating on a newly built concrete structure or an old concrete structure damaged due to erosion and abrasion by means of optimizing the grain composition of multi-component cementing materials and the grain composition of aggregates and utilizing the chemical admixtures, such as a water reducing agent and the like, and the scour and wear resistance of a hydraulic structure is improved through the high scour and wear resistance of the material itself and the excellent bonding of concrete base materials. The technical advantages of the material include that scour and wear resistance of the material is significantly better than that of ordinary concrete; weather resistance and durability of the material are significantly better than those of organic scour and wear-resistant coating materials; a low water-binder ratio is obtained by means of optimizing the grain composition of the cementing materials and the grain composition of the aggregates, so that the requirements on construction mobility are satisfied; under the condition of standard maintenance, the material reaches the high strength of above 150 MPa during the concrete age of 28 days; the impervious performance, carbonation resistance, chloride-ion penetration resistance as well as freezing-thawing cycle resistance and the like of the material are better than those of the ordinary concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete and relates to an ultra-high-performance cement-based anti-scouring material. Background technique [0002] According to the results of a number of domestic and foreign experimental studies and actual water conservancy and hydropower engineering investigations, the impact, friction and cutting of high-speed sandy water on hydraulic structures, resulting in wear and tear on the surface of hydraulic structures one of the main diseases. Under the action of high-speed water flow, the large particle size of moving sand and small particle size of suspended sediment will cause damage to hydraulic structures such as impact, friction and cutting, resulting in large-scale erosion of surface concrete, which not only requires expensive Repair costs, and directly affect the normal operation of the project. To reduce or prevent the erosion and damage of hydraulic structures caused by moving and suspended mat...

Claims

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Application Information

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IPC IPC(8): C04B28/02
Inventor 刘国平赵正施慧聪王俊颜刘健姚欣
Owner 浙江宏日泰耐克新材料科技有限公司
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