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Gelling foamed concrete and preparation method thereof

A foamed concrete and rubber modification technology, which is applied in the field of building materials, can solve the problems of low material strength, easy drying shrinkage cracks, and limited reinforcement effect

Active Publication Date: 2019-04-09
刘沛灵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main methods to reduce the amount of cement are: (1) Increase the amount of other cementitious materials (gypsum, lime) to replace part of the amount of cement, but the strength of the replacement material is small, and it is easy to shrink during the hardening process crack
(2) Use synergists to promote the hydration of cement and other components, but the enhancement effect of such admixtures is limited

Method used

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  • Gelling foamed concrete and preparation method thereof
  • Gelling foamed concrete and preparation method thereof
  • Gelling foamed concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The preparation method of gelling foamed concrete of the present invention comprises the following steps:

[0078] (1) under normal temperature, 0.03 weight part initiator is dissolved in the water of 20-25 weight part, obtains initiator solution;

[0079] (2) Under normal temperature, 0.1 weight part of resin curing agent, 0.1 weight part of stabilizer, 0.5 weight part of water reducing agent and 0.03 weight part of air-entraining agent are respectively dissolved in 20-25 weight parts of water to prepare resin curing agent solution, stabilizer solution, water reducer solution and air-entraining agent solution;

[0080] (3) Add 0.2 parts by weight of olefin monomer and 1.8 parts by weight of epoxy vinyl ester resin to the initiator solution, stir evenly, send it into the reaction kettle, feed nitrogen, and keep stirring at 70-90 ° C for 5 -6 hours, cooling discharge, to obtain the rubber modified epoxy vinyl ester resin;

[0081] (4) adding 2 parts by weight of foamin...

Embodiment 2

[0101] In this example, except that the olefin monomer is butadiene, other preparation methods and reagent consumption are the same as in Example 1.

Embodiment 3

[0103] In this example, except that the olefin monomer is isoprene, other preparation methods and reagent dosages are the same as in Example 1.

[0104] The flame retardant performance of the gelled foamed concrete of Examples 1-3 was tested using the above flame retardant performance detection method, and the test data are shown in Table 2.

[0105] Table 2 Comparison of the flame retardant performance of the cementitious foamed concrete of Examples 1-3

[0106]

[0107] The results in Table 2 show that the gelling foamed concrete of Example 1 has stronger flame retardancy, and the flame retardancy of Example 2 and Example 3 is at the same level, and is much different than that of Example 1. It can be seen that when the olefin monomer is chloroprene, the flame retardancy of the prepared gelled foamed concrete is the best.

[0108] 3. Performance comparison of the cementitious concrete of the present invention with different rubber-modified epoxy vinyl ester resin dosages....

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Abstract

The invention discloses gelling foamed concrete which contains cement, a fine aggregate, a coarse aggregate and an active micro aggregate. The foamed concrete is characterized by containing resin andan auxiliary agent. The resin contains modified unsaturated polyester resin which is rubber modified unsaturated polyester resin. The rubber modified unsaturated polyester resin is rubber modified epoxy vinyl ester resin. The invention also provides a preparation method of the gelling foamed concrete. The preparation method comprises the following steps: (1) carrying out a polymerization reactionon a preparation raw material of rubber and epoxy vinyl ester resin under the action of an initiator to prepare the rubber modified unsaturated polyester resin; (2) preparing an accelerator; (3) preparing foam and gel slurry; and (4) stirring and mixing the foam, gel slurry and an auxiliary agent to prepare the gelling foamed concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a gelling foamed concrete and a preparation method thereof. Background technique [0002] Foamed concrete (also known as foamed concrete) refers to a polymer containing uniform pores that is fully mixed with aggregates such as foaming agent, cement, fly ash, and stone powder to form a double-set continuous structure of organic binders. Foamed concrete fully foams the foaming agent through the foaming system, and then mixes the foam and cement slurry evenly, and then performs cast-in-place construction or mold molding through a pumping system, and is formed by natural curing. Quality insulation material. Foamed concrete has the advantages of low density, light weight, thermal insulation, sound insulation and fire resistance, low elasticity and shock absorption, waterproof and durable, convenient production and construction, and is widely used in roof insulation slopes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B28/04
CPCC04B28/04C04B2111/28C04B2111/40C04B2201/50C04B24/00C04B24/04C04B24/125C04B24/16C04B24/121C04B24/008C04B24/281C04B24/32C04B24/2682C04B18/141C04B14/02C04B14/06C04B16/0633C04B18/08C04B38/106
Inventor 马清浩
Owner 刘沛灵
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