Ultra-lightweight concrete and preparation method thereof

A concrete and ultra-lightweight technology, applied in the field of concrete, can solve the problems of poor recycling of demolition waste, large thermal conductivity, long maintenance period, etc., and achieve the effect of good thermal insulation effect, low dry density, and reduced energy consumption.

Inactive Publication Date: 2016-10-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the concrete currently on the market has shortcomings such as heavy weight, long maintenance period, high thermal conductivity, low temperature resistance, and poor recycling of demolition waste, which greatly restricts its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The ultra-lightweight concrete in this embodiment includes the following components and parts by weight: 100 parts of cementitious material, 40 parts of water, 0.45 parts of water reducing agent, 10 parts of latex, 0.35 parts of polyvinyl alcohol fiber and 68 parts of hollow glass microspheres; Wherein, the cementitious material includes the following components and contents in parts by weight: 100 parts of Portland cement, 35 parts of granulated blast furnace slag and 7 parts of silica fume.

[0034] The strength grade of Portland cement is 52.5; SiO in silica fume 2 The mass percent content of silica fume is 90%, and the average particle size of silica fume is 0.1pm; the water reducer is polycarboxylate water reducer, and the solid content of the polycarboxylate water reducer is 39%; the latex is styrene-butadiene latex , the solid content of the styrene-butadiene latex is 50%; the length of the polyvinyl alcohol fiber is 6mm.

[0035] Hollow glass microspheres inclu...

Embodiment 2

[0046] The ultra-light concrete in this embodiment includes the following components and parts by weight: 100 parts of cementitious material, 40 parts of water, 0.55 parts of water reducing agent, 15 parts of latex, 0.45 parts of polyvinyl alcohol fiber and 88 parts of hollow glass microspheres; Wherein, the cementitious material includes the following components and contents in parts by weight: 100 parts of Portland cement, 40 parts of granulated blast furnace slag and 10 parts of silica fume.

[0047] The strength grade of Portland cement is 52.5; SiO in silica fume 2 The mass percent content of silica fume is 98%, and the average particle size of silica fume is 0.3pm; the water reducer is polycarboxylate water reducer, and the solid content of the polycarboxylate water reducer is 41%; the latex is styrene-butadiene latex , the solid content of the styrene-butadiene latex is 52%; the length of the polyvinyl alcohol fiber is 8mm.

[0048] Hollow glass microspheres include th...

Embodiment 3

[0059] The ultra-lightweight concrete in this embodiment includes the following components and parts by weight: 100 parts of cementitious material, 41 parts of water, 0.5 part of water reducing agent, 13 parts of latex, 0.4 part of polyvinyl alcohol fiber and 81 parts of hollow glass microspheres; Wherein, the cementitious material includes the following components and contents in parts by weight: 100 parts of Portland cement, 37 parts of granulated blast furnace slag and 10 parts of silica fume.

[0060] The strength grade of Portland cement is 52.5; SiO in silica fume 2 The mass percentage content of silica fume is 94%, and the average particle size of silica fume is 0.2pm; the water reducer is polycarboxylate water reducer, and the solid content of the polycarboxylate water reducer is 40%; the latex is styrene-butadiene latex , the solid content of the styrene-butadiene latex is 51%; the length of the polyvinyl alcohol fiber is 7mm.

[0061] Hollow glass microspheres inclu...

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Abstract

The invention relates to ultra-lightweight concrete and a preparation method thereof. The ultra-lightweight concrete is prepared from the following components in parts by weight: 100 parts of a cementing material, 40 to 45 parts of water, 0.45 to 0.55 part of a water-reducing agent, 10 to 15 parts of latex, 0.35 to 0.45 part of polyvinyl alcohol fiber, and 68 to 88 parts of hollow glass microbeads. During preparation, the materials are prepared first; the cementing material, water, the water reducing agent and the latex are added and stirred; then polyvinyl alcohol fiber and the hollow glass microbeads are added in sequence; injection molding and demoulding are carried out to obtain a semi-product; the semi-product is put into a curing chamber for standard curing, so that the ultra-lightweight concrete is obtained. Compared with the prior art, the ultra-lightweight concrete and the preparation method have the advantages that industrial waste slags are sufficiently utilized to serve as a raw material; the prepared ultra-lightweight concrete is low in dry density, high in compressive strength, good in heat preservation and insulation effect, energy-saving, environment-friendly, and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of concrete, and relates to an ultra-light concrete and a preparation method thereof. Background technique [0002] Concrete has become the most used material in the world today, and lightweight aggregate concrete, also known as lightweight aggregate concrete, is made of mineral admixtures of light coarse aggregate, light fine aggregate, cement and water, and chemical admixtures if necessary. made, and under standard curing conditions, the dry apparent density at 28 days of age is less than 1950kg / m 3 of concrete. The dry bulk density of lightweight concrete is not more than 1950kg / m 3 , while the dry bulk density of ultra-lightweight concrete is not greater than 1200kg / m 3 . Ultra-light cement concrete is a stacked structure composed of lightweight porous aggregates, foaming agents and cement. It is different from ordinary concrete. There are two micropores and micro-pipe systems in ultra-light cement c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B38/08C04B111/40
CPCC04B28/08C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B7/02C04B18/146C04B2103/302C04B16/0641C04B14/24C04B24/2676
Inventor 杨果张天瑞余江滔
Owner TONGJI UNIV
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