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Ultra-high performance concrete with compressive strength of 300MPa or more and preparation method

A technology with ultra-high performance and compressive strength, applied in the field of building materials, can solve the problems that hinder the popularization and application of ultra-high performance concrete, poor construction difficulty, low strength, etc., and achieve excellent work performance, improve compactness, and improve work performance. Effect

Active Publication Date: 2016-01-27
JIANGSU SOBUTE NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the existing technology, the strength of ultra-high performance concrete using conventional curing methods is generally not high, and high temperature or pressure curing is required above 200MPa; in addition, due to the ultra-low water-binder ratio and the high viscosity caused by ultra-fine powder particles, Problems such as poor construction are prominent, which seriously hinder the popularization and application of ultra-high performance concrete

Method used

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  • Ultra-high performance concrete with compressive strength of 300MPa or more and preparation method
  • Ultra-high performance concrete with compressive strength of 300MPa or more and preparation method
  • Ultra-high performance concrete with compressive strength of 300MPa or more and preparation method

Examples

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Effect test

Embodiment 1

[0043] In Example 1, the viscosity reducer is a mineral viscosity reducer; the sand is a mixture of quartz sand and corundum in a mass ratio of 20:80.

Embodiment 2

[0044] In Example 2, the viscosity reducer is an organic-inorganic composite liquid viscosity reducer; the sand is a mixture of quartz sand and corundum in a mass ratio of 20:80.

Embodiment 3

[0045] In Example 3, the viscosity reducer is a mineral viscosity reducer; the sand is a mixture of quartz sand and corundum in a mass ratio of 20:80.

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Abstract

The present invention discloses an ultra-high performance concrete with compressive strength of 300MPa or more and a preparation method, and the ultra-high performance concrete comprises the following components in parts by mass: 100 parts of cement, 15 to 70 parts of an admixture, 1 to 5 parts of a nanomaterial, 1 to 20 parts of a viscosity reducer, 110 to 290 parts of sand, 20-50 parts of fibers, 2 to 5 parts of a superplasticizer, 0.1 to 0.5 part of a powder dispersing agent and 15 to 25 parts of water. The ultra-high performance concrete has ultrahigh mechanical properties, the compressive strength after heat curing at 85 DEG C-90 DEG C in standard atmospheric pressure environment can be 300MPa or more, the flexural strength is greater than 55MPa, and the ultra-high performance concrete has excellent working performance and ultrahigh durability.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to an ultra-high-performance concrete, in particular to an ultra-high-performance concrete with a compressive strength of more than 300 MPa and a preparation method thereof. Background technique [0002] Ultra high performance concrete (UHPC for short) has the characteristics of high specific strength, large load capacity, resource and energy saving, and excellent durability. It can meet the requirements of lightweight, high-rise, long-span and high durability in civil engineering. It is one of the main directions for the development of concrete science and technology. In addition, UHPC has excellent properties such as ultra-high impermeability, high corrosion resistance, high anti-explosion and high anti-electromagnetic interference, which can be used in nuclear power plant containment and nuclear waste storage containers to prevent nuclear leakage; it can be used in infras...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/06C04B14/48
Inventor 刘建忠张倩倩刘加平韩方玉沙建芳石亮
Owner JIANGSU SOBUTE NEW MATERIALS
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