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Ultra-high-performance anti-impact anti-abrasion concrete

An ultra-high-performance concrete technology, applied in the field of cement-based building materials, can solve the problems that ultra-high-performance concrete cannot be applied to hydraulic engineering, cannot be constructed or repaired underwater engineering in a flowing water corrosive environment, etc. The effect of flow, improved homogeneity and compactness

Inactive Publication Date: 2020-06-05
CNBM ZHONGYAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem that anti-abrasion materials and ultra-high-performance concrete in the prior art cannot be applied to water conservancy projects, especially underwater projects that cannot be constructed or repaired in a flowing water corrosion environment (abbreviated as a flow erosion environment), the present invention uses cement , microbeads, and silica fume are used as gelling materials, and aggregates and ultrafine aggregates are added to improve particle gradation, and nanometer ultrafine silica, fibers, water reducers, defoamers, regulators, coagulation accelerators and moderators are added. Coagulants are used as functional additives to prepare a new product by adjusting the amount of raw materials, and named it Ultra high performance anti-wear concrete (UHPAC for short), which can resist abrasion in hydraulic structures. The damaged part can be repaired or repaired, and it can also be used in the engineering part with structural impact damage that needs to be repaired. The on-site construction has good construction performance in half an hour, and it can have strength in 6 hours. It has good construction performance and high early strength. It can be applied to engineering parts that are rushing to the construction period, and the compressive strength after 28 days of curing is above 120 MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The raw materials of UHPAC are cement: 1000 parts; microbeads: 110 parts; silica fume: 90 parts; nano-ultrafine silica: 4 parts; fiber: 160 parts; aggregate: 950 parts; superfine aggregate: 80 parts ; Water reducer: 11 parts; Defoamer: 0.5 parts; Regulator: 5 parts; Coagulation accelerator: 0.5 parts; Copper corrugated steel fiber, the aggregate is quartz sand, the superfine aggregate is 300 mesh quartz powder, the setting retarder is boric acid, the coagulation accelerator is lithium sulfate, the regulator is expansion agent and viscosity reducer, the mass ratio is 2:3 , The expansion agent is a mixture of sulfoaluminate clinker, gypsum, and calcium oxide at a mass ratio of 2.8:0.5:1; the viscosity reducer is a mixture of polycarboxylic acid viscosity reducer and polyacrylamide at a mass ratio of 3:1. The measured data are as follows: the initial expansion degree is 720mm, the one-hour expansion degree is 660mm, the 6h compressive strength is 25MPa, the 1d compressive ...

Embodiment 2

[0042] The raw materials of UHPAC are cement: 800 parts; microbeads: 110 parts; silica fume: 90 parts; nano-ultrafine silica: 2 parts; fiber: 165 parts; ; Water reducer: 9 parts; Defoamer: 1 part; Regulator: 4 parts; Coagulation accelerator: 0.3 parts; Micro-copper-plated corrugated steel fiber, the aggregate is corundum, the superfine aggregate is 400 heavy calcium powder, the retarder is citric acid, the coagulation accelerator is aluminum sulfate, the regulator is expansion agent and viscosity reducer, and the mass ratio is 2 :3, the expansion agent is a mixture of sulphoaluminate clinker, gypsum, and calcium oxide with a mass ratio of 2.8:0.5:1; the viscosity reducer is a mixture of polycarboxylic acid viscosity reducer and polyacrylamide with a mass ratio of 3:1 . The measured data are as follows: the initial expansion is 700mm, the expansion in one hour is 630mm, the compressive strength at 6h is 24MPa, the compressive strength at 1d is 87MPa, the compressive strength a...

Embodiment 3

[0044] The raw materials of UHPAC are cement: 900 parts; microbeads: 100 parts; silica fume: 100 parts; nano-ultrafine silica: 4 parts; fiber: 160 parts; aggregate: 950 parts; ; Water reducer: 12 parts; Defoamer: 0.5 parts; Regulator: 4 parts; Coagulation accelerator: 0.5 parts; Copper corrugated steel fiber, the aggregate is quartz sand, the superfine aggregate is 300 mesh quartz powder, the setting retarder is boric acid, the coagulation accelerator is lithium sulfate, the regulator is expansion agent and viscosity reducer, the mass ratio is 2:3 , the expansion agent is a nitroso plastic expansion agent; the viscosity reducer is a polycarboxylate viscosity reducer. The measured data are as follows: the initial expansion degree is 6600mm, the one-hour expansion degree is 600mm, the 6h compressive strength is 20MPa, the 1d compressive strength is 80MPa, the 7d compressive strength is 98MPa, the 28d compressive strength is 121MPa, the 28d flexural strength is 18.6MPa, and the 2...

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Abstract

The invention relates to ultra-high-performance anti-impact anti-abrasion concrete. Cement, microbeads and silica fume are used as cementing materials; aggregate and ultrafine aggregate are added to perfect the grain composition; nanometer ultrafine silicon dioxide, fibers, a water reducing agent, a defoaming agent, a regulating agent, a coagulation accelerator and a retarder are added to be usedas functional auxiliary agents. The concrete can be used for building or repairing parts with impact abrasion damage in hydraulic structures, can also be used for engineering parts with structure impact damage needing to be repaired, and has good construction performance, mechanical performance and impact abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of cement-based building materials, in particular to an ultra-high performance anti-scouring concrete and its application. Background technique [0002] Based on the research status at home and abroad, the current research and application of anti-scouring materials are mainly divided into the following three categories: 1) Thin-layer repair materials, mainly polyurea anti-impact and wear-resistant coatings, resin mortar, polymer cemented concrete, and furan concrete 2) Surface protection materials, mainly represented by steel plates, strip stones, cast stone slabs, etc.; 3) High-performance anti-scouring concrete, mainly silica fume series concrete, fiber reinforced concrete, HF concrete, fly ash concrete etc. as representatives. However, anti-abrasion materials such as polyurea and resin mortar are mainly aimed at solving the problem of repairing thin layers damaged by sandy water flow with a large amount ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20C04B111/72
CPCC04B28/04C04B2111/20C04B2111/72C04B2201/50C04B18/082C04B18/146C04B14/06C04B14/48C04B16/0641C04B14/324C04B14/28C04B24/06C04B22/0013C04B2103/302C04B2103/50C04B2103/0068C04B22/10C04B22/148C04B22/147C04B22/143C04B22/064C04B24/24C04B24/2652
Inventor 仲从春朱玉雪瞿海洋张帅李婷曹虎初秀丽马加营
Owner CNBM ZHONGYAN TECH
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