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Abrasion-resistant thermal insulation concrete for water conservancy and preparation method thereof

A thermal insulation and concrete technology, which is applied in the field of water-utilized, abrasion-resistant thermal insulation concrete and its preparation, can solve the problems of reducing the durability of concrete, affecting the life of concrete, cracking of concrete, etc. The effect of spreading suppression and reducing water consumption

Inactive Publication Date: 2020-10-16
占柯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flood discharge structures are an important part of water conservancy and hydropower projects. These projects are sometimes unavoidably built in high-temperature and high-heat areas. Due to the high-temperature environment, the temperature difference between the inner and outer surfaces of the concrete produces additional temperature stress, which makes the concrete crack and the durability of the concrete. Reduce, in high geothermal areas, high temperature fissure water will flow out from time to time, which will erode concrete and further affect the life of concrete. Therefore, in order to ensure the operation of water conservancy buildings in high geothermal areas, this has brought huge impact challenge

Method used

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  • Abrasion-resistant thermal insulation concrete for water conservancy and preparation method thereof
  • Abrasion-resistant thermal insulation concrete for water conservancy and preparation method thereof
  • Abrasion-resistant thermal insulation concrete for water conservancy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of concrete for water utilization, abrasion resistance, heat preservation and heat insulation, its raw materials and dosage per unit volume include: 42.5 Portland cement 349.5kg / m 3 , 191.7kg / m admixture with a particle size of 150-250μm 3 , vitrified microbeads 26.4kg / m 3 , aluminum nitride 7.8kg / m 3 , Corundum 120.9kg / m 3 620.5kg / m of continuous graded gravel with a particle size of 10-18mm 3 , 709kg / m of artificial sand with a fineness modulus of 2.6 3 , water-based epoxy resin 1.67kg / m 3 , polyvinyl alcohol fiber 0.67kg / m 3 , carbon fiber 1.67kg / m 3 , polypropylene fiber 12.69kg / m 3 , Polycarboxylate superplasticizer 13.2kg / m 3 , water 211.5kg / m 3 .

[0035] The admixture consists of 10% silica fume, and the balance is enhanced fly ash; the enhanced fly ash is prepared by the following process: immerse 40kg of fly ash in a sulfuric acid solution with a concentration of 1mol / L for 2 hours, and use deionized Wash with water, add 1kg magnesia and 2.5k...

Embodiment 2

[0041] A water-utilizing, abrasion-resistant, heat-preserving and heat-insulating concrete, its raw materials and dosage per unit volume include: 62.5 Portland cement 375.9kg / m 3 , 178.5kg / m admixture with a particle size of 150-250μm 3 , vitrified beads 11.44kg / m 3 , aluminum nitride 9.36kg / m 3 , Corundum 83.2kg / m 3 , 728kg / m of continuous graded gravel with a particle size of 10-18mm 3 , 755.1kg / m of artificial sand with a fineness modulus of 2.4 3 , water-based epoxy resin 0.6kg / m 3 , polyvinyl alcohol fiber 0.72kg / m 3 , carbon fiber 0.6kg / m 3 , polypropylene fiber 10.08kg / m 3 , Polycarboxylate superplasticizer 26.4kg / m 3 , water 185.1kg / m 3 .

[0042] The admixture consists of 20% silica fume, and the balance is enhanced fly ash; the enhanced fly ash is prepared by the following process: immerse 20kg of fly ash in a sulfuric acid solution with a concentration of 2mol / L for 1 hour, and use deionized Wash with water, add 3kg of magnesium oxide, 0.5kg of aluminum s...

Embodiment 3

[0048] A kind of concrete for water utilization, abrasion resistance, heat preservation and heat insulation, its raw materials and dosage per unit volume include: 42.5 Portland cement 356.8kg / m 3 , 188.4kg / m admixture with a particle size of 150-250μm 3 , expanded vitrified microbeads 14.61kg / m 3 , aluminum nitride 8.99kg / m 3 , Corundum 88.79kg / m 3 674.31kg / m of continuous graded gravel with a particle size of 10-18mm 3 , 746.7kg / m of artificial sand with a fineness modulus of 2.5 3 , water-based epoxy resin 0.79kg / m 3 , polyvinyl alcohol fiber 0.73kg / m 3 , carbon fiber 0.79kg / m 3 , polypropylene fiber 10.89kg / m 3 , Polycarboxylate superplasticizer 23.2kg / m 3 , water 190.3kg / m 3 .

[0049] The specification of expanded vitrified microbeads is 116kg / m 3 , the particle size is 0.8-1.4mm, and the thermal conductivity is 0.051W / (m·K).

[0050] The admixture consists of 17% silica fume, and the balance is enhanced fly ash; the enhanced fly ash is prepared by the followi...

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Abstract

The invention discloses an abrasion-resistant thermal insulation concrete for water conservancy. The concrete comprises following raw materials (kg / m<3>): 349.5 to 375.9 parts of Portland cement, 178.5 to 191.7 parts of an admixture, 775.6 to 832 parts of coarse aggregate, 709 to 755.1 parts of fine aggregate, 12 to 16.7 parts of composite fibers, 13.2 to 26.4 parts of a polycarboxylate water reducer, and 185.1 to 211.5 parts of water; wherein the admixture comprises the following components in percentage by mass: 10-20% of silica fume and the balance of reinforcing fly ash. The invention discloses a preparation method of the concrete. The preparation method comprises the following steps: mixing the Portland cement, the admixture, the coarse aggregate and the fine aggregate to obtain a drymixture; mixing the polycarboxylate water reducer with water to obtain a water solution; adding the water solution into the dry mixture, stirring, adding the composite fibers in batches, uniformly mixing, pouring into a mould, vibrating, compacting, moulding, standing at the room temperature for 20-30 hours, demoulding, and carrying out standard curing.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a water-utilizing, abrasion-resistant, heat-preserving and heat-insulating concrete and a preparation method thereof. Background technique [0002] With the development of our society, the demand for energy has exploded. Among them, hydropower resources are a kind of green, clean and efficient energy, so my country is paying more and more attention to the development of hydropower resources. According to the "China Renewable Energy Medium and Long-term Development Plan", by 2020, the national hydropower installed capacity will reach 300 million kilowatts, accounting for about 23% of the installed capacity of China's power system. Flood discharge structures are an important part of water conservancy and hydropower projects. These projects are sometimes unavoidably built in high-temperature and high-heat areas. Due to the high-temperature environment, the tem...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20C04B111/28C04B111/34
CPCC04B28/04C04B2111/00017C04B2111/00293C04B2111/2038C04B2111/28C04B2111/343C04B2201/32C04B2201/50C04B18/146C04B18/08C04B14/24C04B14/326C04B14/303C04B14/02C04B14/06C04B24/281C04B16/0641C04B14/386C04B16/0633C04B2103/302C04B22/141C04B22/066C04B22/148C04B22/062C04B24/005
Inventor 占柯
Owner 占柯