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EPS (Expandable Polystyrene) lightweight aggregate concrete and preparation method thereof

A lightweight aggregate concrete and concrete technology, which is applied in the fields of concrete, artificial stone or ceramic products and their manufacture, and mortar, can solve the problems of EPS lightweight aggregate concrete with many holes, difficult surface bonding, and EPS particles floating up, so as to achieve maintenance The process is simple and easy to implement, reduces requirements, and is conducive to the effect of energy saving

Active Publication Date: 2012-08-22
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] EPS granules are a material with very good thermal insulation performance, but the special properties of this material will also bring some problems to concrete: First, the density of EPS granules is much smaller than that of fly ash cement mortar, which is easy to mix and form during the mixing process. The EPS particles float up and the material is stratified; second, if the particle size of the EPS particles is too large, it may cause a relative shortage of cement paste, resulting in more holes in the EPS lightweight aggregate concrete.
The distinct surface properties of these two materials lead to their surface difficulty and bonding

Method used

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  • EPS (Expandable Polystyrene) lightweight aggregate concrete and preparation method thereof
  • EPS (Expandable Polystyrene) lightweight aggregate concrete and preparation method thereof
  • EPS (Expandable Polystyrene) lightweight aggregate concrete and preparation method thereof

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preparation example Construction

[0100] Preparation Technology of EPS Lightweight Aggregate Concrete

[0101] EPS particles are a material with very good thermal insulation properties. However, the special properties of this material will also bring some problems to concrete: first, the density of EPS particles is much smaller than that of fly ash cement mortar, and EPS particles are prone to float and material stratification during the mixing molding process; If the particle size of EPS particles is too large, it may cause relatively insufficient cement paste, resulting in more holes in EPS lightweight aggregate concrete. These two factors seriously reduce the uniform compactness of EPS lightweight aggregate concrete. The third is that EPS particles are an organic material with lipophilicity on the surface, while cement is an inorganic material mainly composed of ionic compounds, so its surface agglomerates have strong water absorption. The distinct surface properties of these two materials make their surf...

Embodiment 1

[0111] In this example, the ratio of selected raw materials is: 350 parts of cement, 110 parts of fly ash, 70 parts of silica fume, 127 parts of river sand, 198 parts of water, 15 parts of EPS particles, 40 parts of perlite, and 18 parts of polyvinyl acetate emulsion;

[0112] The particle size of silica fume is 0.1μm, and the density is 2.4g / cm 3 , bulk density 350kg / m 3 , specific surface area 25000m 2 / kg;

[0113] The river sand ratio is 20% by volume, and the bulk density is 1325kg / m 3 , the water absorption rate is 1.0%;

[0114] The density of EPS particles is 10kg / m 3 ;

[0115] Preparation Process:

[0116] shell making

[0117] Add the polyvinyl acetate solution together with a small amount of water, cement, silica fume and fly ash into the first forced mixer and stir into a paste;

[0118] Put the EPS particles into the first forced mixer and stir for 8 seconds, so that a thin layer of uniform cement-mixed mortar hangs on the surface of the EPS particles;

...

Embodiment 2

[0133] In this example, the ratio of selected raw materials is: 350 parts of cement, 90 parts of fly ash, 50 parts of silica fume, 120 parts of river sand, 190 parts of water, 18 parts of EPS particles, 50 parts of perlite, and 15 parts of polyvinyl acetate emulsion;

[0134] The particle size of silica fume is 0.15μm, and the density is 2.2g / cm 3 , bulk density 280kg / m 3 , specific surface area 20000m 2 / kg;

[0135] The river sand ratio is 22% by volume, and the bulk density is 1275kg / m 3 , the water absorption rate is 0.95%;

[0136] The density of EPS particles is 15kg / m 3 ;

[0137] Preparation Process:

[0138] shell making

[0139] Add the polyvinyl acetate solution together with a small amount of water, cement, silica fume and fly ash into the first forced mixer and stir into a paste;

[0140] Put the EPS particles into the first forced mixer and stir for 10 seconds, so that a thin layer of uniform cement-mixed mortar hangs on the surface of the EPS particles; ...

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Abstract

The invention provides EPS (Expandable Polystyrene) lightweight aggregate concrete and a preparation method thereof. The EPS lightweight aggregate concrete effectively meets the requirements of concrete on light weight, uniformity and density in the aspect of structure, and simultaneously has excellent comprehensive properties; the volume weight of the EPS lightweight aggregate concrete is higher than 650 kg / m<3>, the cube compressive strength can reach 1.6MPa, the strength meets the service requirements, and the lightweight aggregate concrete has excellent thermal properties and durability; and shown in a compression test, the concrete has larger deformation before the concrete is damaged due to deformation, so that the toughness of the concrete is improved. The lightweight aggregate concrete comprises the following raw materials in parts by weight: 350 parts of cement, 90-120 parts of fly coal ash, 30-70 parts of silica fume, 120-140 parts of river sand, 190-210 parts of water, 15-21 parts of EPS grains, 40-60 parts of perlite and 12-18 parts of polymer emulsion. The preparation method comprises the steps of crusting, slurry wrapping, mixing, forming and curing. The lightweight aggregate concrete obtained according to the mixture ratio and the preparation method is uniform and dense in structure, and various properties meet the design requirements, so that the EPS lightweight aggregate concrete has better application prospects.

Description

technical field [0001] The invention belongs to the field of porous mortar, concrete, artificial stone or ceramic products and their manufacturing methods, and in particular relates to EPS light aggregate concrete and its preparation method. Background technique [0002] With the continuous advancement of my country's wall reform and the promulgation of new energy-saving standards, clay bricks will gradually be banned due to their inherent defects. At present, in order to promote the development of my country's wall reform and meet the requirements of building energy conservation, the staff have been researching wall materials, looking for new wall materials, and have researched and developed various new blocks to replace the original clay bricks. . In addition, with the strengthening of the awareness of environmental protection, countries have attached great importance to the research of using garbage waste as building materials, and have also developed many recycling techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B16/08
Inventor 张雪松
Owner CHINA ELECTRIC POWER RES INST
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