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Expanded Polystyrene (EPS) light aggregate concrete and preparation method thereof

A light aggregate concrete and raw material technology, which is applied in the field of mortar, concrete, artificial stone or ceramic products and its manufacturing, can solve the problems of EPS light aggregate concrete with many holes, EPS particles floating, difficult surface and bonding, etc. Good bonding condition, uniform distribution of pore structure, and the effect of reducing requirements

Inactive Publication Date: 2013-01-16
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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  • Expanded Polystyrene (EPS) light aggregate concrete and preparation method thereof
  • Expanded Polystyrene (EPS) light aggregate concrete and preparation method thereof
  • Expanded Polystyrene (EPS) light aggregate concrete and preparation method thereof

Examples

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preparation example Construction

[0091] Preparation Technology of EPS Lightweight Aggregate Concrete

[0092] Combined with the characteristics of EPS light aggregate concrete, the technological process such as technical attachment figure 1 shown. This process technology is introduced from three aspects: mixing process, molding process and maintenance process:

[0093] mixing process

[0094] The mixing process is very important for making uniform and dense EPS light aggregate concrete. According to the raw material mix ratio, first mix cement, fly ash, silica fume, perlite and part of water into a low water-cement ratio clean slurry, and then mix the clean slurry Stir the EPS particles together, and finally add the remaining water and stir well.

[0095] Pressurized Vibration Forming Process

[0096] Since the density of EPS particles is much smaller than that of cement mortar, serious delamination will occur when the usual vibration molding process is used; resulting in uneven quality of EPS lightweight...

Embodiment 1

[0100] In this example, the ratio of selected raw materials is: 350 parts of cement, 110 parts of fly ash, 70 parts of silica fume, 126 parts of river sand, 198 parts of water, 15 parts of EPS particles, 40 parts of perlite, and 2 parts of water reducing agent;

[0101] 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;

[0102] The river sand ratio is 20% by volume, and the bulk density is 1325kg / m 3 , the water absorption rate is 1.0%;

[0103] The density of EPS particles is 10kg / m 3 ;

[0104] Preparation Process:

[0105] mixing process

[0106] At room temperature, mix cement, fly ash, silica fume, perlite, water reducer, river sand, and 20-30% water through a mixer for 10 seconds to obtain a clean slurry with a low water-cement ratio; add the remaining water and EPS particles to Stir in the clean slurry for 10s to obtain the mixture;

[0107] Molding

[0108] Transfer the mix...

Embodiment 2

[0115] In this example, the selected raw material ratio 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 4 parts of water reducing agent;

[0116] 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;

[0117] The river sand ratio is 22% by volume, and the bulk density is 1275kg / m 3 , the water absorption rate is 0.95%;

[0118] The density of EPS particles is 15kg / m 3 ;

[0119] Preparation Process:

[0120] mixing process

[0121]At room temperature, mix cement, fly ash, silica fume, perlite, water reducer, river sand and 20-30% water through a mixer for 5 seconds to obtain a low water-cement ratio clean slurry; add the remaining water and EPS particles to Stir in the clean slurry for 5s to obtain the mixture;

[0122] Molding

[0123] Transfer the mixing material t...

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Abstract

The invention provides EPS light aggregate concrete and a preparation method thereof. The EPS light aggregate concrete effectively meets the requirements on a light-weight, uniform and dense structure of the concrete, and has an outstanding integrated performance; the EPS light aggregate concrete has a unit weight of up to 550 kg / m<3> and a cube crushing strength of up to 1.3 MPa which meets the using requirement; in addition, the light aggregate concrete has good thermal performance and durability. In a compression test for the concrete, a large deformation occurs before deformed breakage, and the toughness is improved. The light aggregate concrete comprises 350 parts of cement, 90 to 120 parts of coal ash, 30 to 70 parts of silica fume, 120 to 140 parts of river sand, 190 to 210 parts of water, 15 to 21 parts of EPS particles, 40 to 60 parts of perlite and 2 to 6 parts of water reducer. The light aggregate concrete prepared by the preparation method according to the proportion is uniform and dense in structure, and meets the design requirements on each performance and preparation, so as to have a good application prospect.

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. 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 technologies, and some have formulated corresponding technical specifications. And discarded polystyrene foam (EPS) has stable chemical properties and is not easy to corrode, which is a kind of pollution to the environment; however, it is also a light material with very good thermal insulation performance. Therefore, break...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B28/04B28B11/24C04B18/08C04B14/04C04B14/06C04B14/18C04B16/08
CPCY02W30/91
Inventor 张雪松
Owner CHINA ELECTRIC POWER RES INST
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