Ultra-high performance cement-based impact wear 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: 2014-07-23
SHANGHAI LUOYANG NEW MATERIAL TECH
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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, frictio

Method used

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  • Ultra-high performance cement-based impact wear resistant material
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  • Ultra-high performance cement-based impact wear resistant material

Examples

Experimental program
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Example Embodiment

[0060] Example 1

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

[0062] The proportion of cement, silica fume, fly ash and fine aggregate is calculated by numerical analysis and calculation through the ideal accumulation curve and the cumulative distribution curve of its particle size;

[0063] 1) The ideal accumulation curve formula is:

[0064] P sd =100· / m / ;

[0065] Where 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 size of the particles;

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

Example Embodiment

[0090] Example 2

[0091] Ultra-high performance cement-based anti-abrasive material, including cementitious material, fine aggregate, water, water reducing agent and defoamer, the cement is P·II cement with a strength grade of 52.5, and the mineral admixture is Silica fume and mineral powder, the fine aggregate used is ultra-fine natural sand with a fineness modulus of 1.4 and ultra-fine artificial sand with a fineness modulus of 1.2. The distribution ratio of each group of cementitious material and aggregate is calculated according to the method of Example 1, and X c =0.598, X sf =0.091, X bs =0.086, X s1 =0.108 and X s2 =0.117. Water-binder ratio W / B=0.131, the admixture uses polycarboxylic acid water reducing agent solution, the dosage is 1.2% of the mass of the gelling material, and the silicone defoamer is used, the dosage is 0.1% of the mass of the gelling material.

[0092] The main material consumption of ultra-high performance cement-based anti-wear materials, the volu...

Example Embodiment

[0103] Example 3

[0104] Ultra-high performance cement-based anti-abrasive 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 For silica fume, fly ash and mineral powder, the fine aggregates used are 10-20 mesh 1# quartz sand, 20-40 mesh 2# quartz sand and 40-80 mesh 3# quartz sand. The distribution ratio of each group of cementitious material and aggregate is calculated according to the method of Example 1, and 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. Water-binder ratio W / B=0.269, the fiber uses polyvinyl alcohol fiber with a diameter of 40μm and a length of 12mm, the volume is 0.1%, and the water-reducing agent uses polycarboxylic acid water-reducing agent solution, and the content is 1.2 of the mass of the gelling material. %, using polyol shrinkage reducing agent, the dosa...

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Abstract

The invention relates to an ultra-high performance cement-based impact wear resistant material. By optimizing the grain gradation of a multi-element cementing material and the grain gradation of an aggregate, and using a water reducing agent and other chemical admixtures, the material provided by the invention can be employed to perform surface coating on a newly constructed concrete structure or an impact wear damaged old concrete structure, and the impact wear resistance of a hydraulic structure can be improved by means of the high impact wear resistance of the material itself and the good adhesion of a concrete substrate. The material has the technical advantages that: the impact wear resistance is significantly superior to that of ordinary concrete; the weatherability and durability are significantly superior to those of an organic impact wear resistant coating material; by optimizing the grain gradation of the cementing material and the grain gradation of the aggregate, the material can meet the construction liquidity requirements under a low water-binder ratio; under standard curing conditions, the material can reach high strength of more than 150MPa after 28 days; and the anti-permeability, carbonization resistance, chloride ion penetration resistance, freezing-thawing cycle resistance and other properties are superior to those of 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-abrasion material. Background technique [0002] According to the results of a number of domestic and foreign experimental studies and actual water conservancy and hydropower engineering surveys, the impact, friction and cutting effects of high-speed sandy water flow on hydraulic structures, causing wear and damage to the surface of hydraulic structures are in the operation of water conservancy and hydropower projects. One of the main diseases. Under the action of high-speed water flow, large-sized bedrock sand and small-sized suspended load silt will cause damage to hydraulic structures such as impact, friction and cutting, resulting in large-scale denudation of surface concrete, which is not only expensive The cost of repairing, and directly affect the normal operation of the project. To reduce or prevent the impact of load and suspended l...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/06
Inventor 刘国平赵正施慧聪王俊颜刘健姚欣
Owner SHANGHAI LUOYANG NEW MATERIAL TECH
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