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Forming equipment and technology of interface-reinforced lightweight concrete

A lightweight concrete and interface enhancement technology, applied in the field of lightweight concrete, can solve the problems of restricting the performance of EPS concrete, weak cohesion, uneven mixing of expanded polystyrene particles and cement slurry, etc., and achieve excellent interface. Performance and usability, ease of operation, and the effect of improving interface performance and usability

Inactive Publication Date: 2018-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the traditional concrete blending molding methods are used to prepare concrete, which easily leads to uneven mixing of expanded polystyrene particles and cement paste, and weak interface bonding with cement paste, which limits the performance of the resulting EPS concrete.

Method used

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  • Forming equipment and technology of interface-reinforced lightweight concrete
  • Forming equipment and technology of interface-reinforced lightweight concrete
  • Forming equipment and technology of interface-reinforced lightweight concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A molding process for interface-reinforced lightweight concrete, using such as Figure 4 Described forming equipment; Specifically comprise the steps:

[0044] 1) Weigh the expanded polystyrene particles with a particle size of 3mm through the EPS raw material inlet 1 and transport them to the modified particle coating and drying device 2-3, spray ethylene vinyl acetate (VAE) emulsion on it, and control the ethylene acetate The mass ratio of the amount of vinyl ester (VAE) emulsion sprayed to expanded polystyrene particles is 1:8, and the spraying time is controlled at about 5 minutes; then it is dried at room temperature for 60 minutes (25°C) to obtain ethylene vinyl acetate (VAE) emulsion modification 20 parts of permanent expanded polystyrene particles (parts by weight, the same below), and are delivered to the mixing device 6;

[0045] 2) The raw materials of the cement slurry are weighed through the cement slurry raw material inlet 9 and transported to the cement ...

Embodiment 2～4

[0051] A molding process for interface-reinforced lightweight concrete, the process conditions of which are roughly the same as in Example 1, except that the additions of expanded polystyrene particles are 10g, 30g and 40g respectively; the interface-reinforced lightweight concrete obtained under the formula conditions The performance test results of concrete are shown in Table 1.

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Abstract

The invention provides forming equipment and a technology of interface-reinforced lightweight concrete. Modified emulsion of ethylene vinyl acetate (VAE) is carried out on foamed polystyrene (EPS) byadopting a spraying method; then the obtained ethylene vinyl acetate (VAE) emulsion modified foamed polystyrene particles are mixed with a cement paste body; and mixing and curing are carried out to obtain the interface-reinforced lightweight concrete . According to the equipment and the technology, the bonding performance of the interface of the obtained light-weight concrete cement paste body can be effectively improved by improving the forming technology and the forming equipment of the EPS lightweight concrete; and the obtained interface-reinforced lightweight concrete has excellent performances such as light weight, high strength, good sound insulation and heat preservation performance and the like, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of lightweight concrete, and in particular relates to a molding process and equipment for interface-reinforced lightweight concrete. Background technique [0002] Expandable Polystyrene foam (Expandable PolyStyrene, EPS) is a lightweight foam with a closed-cell structure inside. Mixing EPS foam particles into mortar or concrete can prepare lightweight concrete with different apparent densities. In recent years, with the continuous emergence of high-rise buildings, the demand for lightweight high-strength concrete is increasing. EPS lightweight concrete has the characteristics of high density and light weight, so it has become more and more widely used in building construction. However, EPS particles have two major weaknesses. One is that they are very light and are prone to segregation during the concrete mixing process. The other is that they are hydrophobic and have weak interface bonding with cement past...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B15/00
CPCB28B15/00
Inventor 蹇守卫张文长黄健马保国
Owner WUHAN UNIV OF TECH
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