Lightweight concrete

A lightweight concrete, high-quality technology, applied in the field of concrete, can solve the problems of unstable foam, high price, insufficient compressive strength, etc., and achieve the effect of simple and convenient operation method, reduction of production cost, and reduction of raw material consumption.

Pending Publication Date: 2021-07-30
珠海澳大科技研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the foaming agents used in lightweight concrete generally have problems such as large dosage, unstable performance and high price.
The existing foaming agent is easy to agglomerate the bubbles during preparation, resulting in an increase in size, so the obtained foam is unstable
The active components of the foaming agent account for a large proportion, which increases the preparation cost of the foaming agent
Most of the foaming agents with good performance need to be imported, which not only increases the cost of lightweight concrete, but also is not conducive to large-scale production and application
[0004] The existing lightweight concrete still has the problem of insufficient compressive strength, which also affects the popularization and application of this material in many fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The raw material composition of the lightweight concrete in this example can be seen in Table 1.

[0078] The preparation method of this example lightweight concrete comprises the following steps:

[0079] Weigh 400g of cement, 4g of perlite and 180mL of water and mix to obtain a slurry.

[0080] Mix the surface hydrophilic modified nano-attapulgite powder, sodium dodecylbenzenesulfonate, polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, methylcellulose and triethanolamine in proportion, and then mix them according to the mass ratio 1:300 is mixed with water to obtain a blowing agent solution; the mass content of each raw material of the prepared blowing agent solution is as follows: 0.06% of nano-attapulgite powder with hydrophilic modification on the surface of silane coupling agent, dodecylbenzenesulfonate Sodium phosphate 0.08%, polyacrylamide 0.016%, polyethyleneimine 0.016%, polyvinylpyrrolidone 0.04%, methylcellulose 0.18%, triethanolamine 0.008%, and the...

Embodiment 2

[0083] The raw material composition of the lightweight concrete in this example can be seen in Table 1. The only difference between this example and Example 1 is that the amount of perlite is 12g, that is, the addition amount relative to cement is changed from 1wt% to 3wt%, and the rest of the raw material composition and preparation method are the same as in Example 1.

Embodiment 3

[0085] The raw material composition of the lightweight concrete in this example can be seen in Table 1.

[0086] The preparation method of this example lightweight concrete comprises the following steps:

[0087] Weigh 250g of cement, 150g of fly ash, 4g of perlite and mix with 180mL of water to obtain a slurry.

[0088] Mix the surface hydrophilic modified nano-attapulgite powder, sodium dodecylbenzenesulfonate, polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, methylcellulose and triethanolamine in proportion, and then mix them according to the mass ratio 1:300 is mixed with water to obtain a blowing agent solution; the mass content of each raw material of the prepared blowing agent solution is as follows: 0.06% of nano-attapulgite powder with hydrophilic modification on the surface of silane coupling agent, dodecylbenzenesulfonate Sodium phosphate 0.08%, polyacrylamide 0.016%, polyethyleneimine 0.016%, polyvinylpyrrolidone 0.04%, methylcellulose 0.18%, triethanolami...

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Abstract

The invention discloses lightweight concrete. The lightweight concrete comprises the following components: a cementing material, perlite, foam and water, wherein the cementing material comprises cement; the foam is prepared by foaming a foaming agent solution; and the foaming agent solution comprises surface hydrophilic modified nanoparticles, a surfactant, cellulose, a polymer and an auxiliary agent. The foam prepared by foaming the modified foaming agent and the perlite are used for preparing the lightweight concrete, and the prepared lightweight concrete has the advantages of good performance, obviously improved compressive strength, reduced preparation cost and environmental protection, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a lightweight concrete. Background technique [0002] Lightweight concrete is a new type of lightweight concrete with a large number of closed pores formed by fully foaming the foaming agent through a foaming machine, uniformly mixing the foam and cement slurry, and then undergoing cast-in-place construction or mold molding, and natural curing. Quality insulation material. It belongs to the bubble-like thermal insulation material, and its outstanding feature is that it forms closed foam pores inside the concrete, which makes the concrete lightweight and thermally insulated. [0003] At present, the foaming agents used in lightweight concrete generally have problems such as large dosage, unstable performance and high price. The bubbles of existing foaming agents are easy to agglomerate during preparation, resulting in an increase in size, and thus the obtained foam is unstable....

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/08C04B38/10C04B111/40
CPCC04B28/04C04B28/08C04B38/106C04B2111/40C04B2201/20C04B2201/50C04B2201/32C04B2111/00008C04B14/18C04B14/102C04B24/20C04B24/2652C04B24/383C04B24/122
Inventor 孙国星
Owner 珠海澳大科技研究院
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