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High-strength lightweight porous concrete and preparation method thereof

A porous concrete, lightweight technology, applied in the field of concrete, can solve problems such as low concrete strength and inability to meet engineering needs, and achieve the effects of reducing porosity, firm interface bonding, and alleviating stress concentration

Inactive Publication Date: 2021-02-02
北京城建九混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that for construction engineering, concrete strength is an important indicator of concrete quality, especially for large-scale buildings, concrete strength is more important. Although the above-mentioned concrete has a light weight effect, it can meet the requirements of general construction. However, for some buildings with high engineering quality requirements, the concrete strength is low and cannot meet the engineering needs

Method used

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  • High-strength lightweight porous concrete and preparation method thereof
  • High-strength lightweight porous concrete and preparation method thereof
  • High-strength lightweight porous concrete and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Table 1 is the raw material and quality of a kind of high-strength lightweight porous concrete of embodiment 1

[0039]

[0040]

[0041] Among them, the fineness modulus of sand is 2.8, the particle size of stone is 5-10mm, and the particle size of steel slag is 10-15um;

[0042] A preparation method of high-strength lightweight porous concrete, specifically comprising the following steps:

[0043] S1. Foaming: add 1kg rosin resin, 1kg sodium bicarbonate and 3kg sodium alkylbenzene sulfonate into 110kg water to dilute to form a foaming liquid, and foam it through an air compression foaming machine to obtain a homogeneous, stable and delicate foam Foam, foam density 50kg / m 3 ;

[0044] S2, pulping: 350kg cement, 720kg sand, 1150kg gravel, 50kg steel slag, 30kg fly ash, 90kg slag, 110kg water, 20kg heavy calcium, 25kg straw fiber, 20kg kaolin, 12kg bentonite, 4kg expanded perlite and 4kg reduced The water agent is added into the mixing tank, and stirred evenly t...

Embodiment 2

[0047] Table 2 is the raw material and quality of a kind of high-strength lightweight porous concrete of embodiment 2

[0048] raw material mass (kg) raw material mass (kg) cement 400 straw fiber 30 sand 750 Kaolin 25 pebbles 1100 Rosin resin 2 steel slag 60 sodium bicarbonate 2 fly ash 50 Sodium alkylbenzene sulfonate 4 slag 100 polyacrylamide 12 water 280 expanded perlite 6 heavy calcium 25 Superplasticizer 3

[0049] Among them, the fineness modulus of sand is 3.0, the particle size of stone is 10-20mm, and the particle size of steel slag is 15-20um;

[0050] A preparation method of high-strength lightweight porous concrete, specifically comprising the following steps:

[0051] S1. Foaming: add 2kg rosin resin, 2kg sodium bicarbonate and 4kg sodium alkylbenzene sulfonate to 140kg water to dilute it into a foaming liquid, and foam it through an air compression foaming machine to obtain ...

Embodiment 3

[0055] Table 3 is the raw material and quality of a kind of high-strength lightweight porous concrete of embodiment 3

[0056] raw material mass (kg) raw material mass (kg) cement 360 Kaolin 15 sand 800 Rosin resin 3 pebbles 1200 sodium bicarbonate 1.5 steel slag 70 Sodium alkylbenzene sulfonate 5 fly ash 50 Bentonite 6 slag 110 polyacrylamide 5 water 250 Cellulose ether 7 heavy calcium 30 expanded perlite 8 straw fiber 35 Superplasticizer 5

[0057] Among them, the fineness modulus of sand is 3.2, the particle size of stone is 20-30mm, and the particle size of steel slag is 20-25um;

[0058] A preparation method of high-strength lightweight porous concrete, specifically comprising the following steps:

[0059] S1. Foaming: Add 3kg rosin resin, 1.5kg sodium bicarbonate and 5kg sodium alkylbenzene sulfonate into 125kg water to dilute it into a foaming liquid, and foam it through a...

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Abstract

The invention relates to the technical field of concrete, and particularly discloses high-strength light porous concrete and a preparation method thereof. The high-strength lightweight porous concreteis prepared from the following raw materials in parts by weight: 350-400 parts of cement, 700-800 parts of sand, 1100-1200 parts of stones, 170-230 parts of a mineral admixture, 220-280 parts of water, 20-30 parts of coarse whiting, 25-40 parts of straw fibers, 15-30 parts of kaolin, 5=10 parts of a foaming agent, 12=18 parts of a tackifier, 4=8 parts of expanded perlite and 3=5 parts of a waterreducing agent. The mineral admixture is prepared from the following raw materials in parts by weight: 50-70 parts of steel slag, 30-50 parts of fly ash and 90-110 parts of slag; the preparation method comprises the following steps: fully foaming the foaming agent through a foaming machine, and uniformly mixing the foam with cement paste to prepare the high-strength light porous concrete. According to the concrete, closed foam holes are formed in the concrete so that the lightweight effect is achieved, and the added straw fibers and mineral admixtures can improve the mechanical strength of theconcrete.

Description

technical field [0001] The application relates to the technical field of concrete, more specifically, it relates to a high-strength lightweight porous concrete and a preparation method thereof. Background technique [0002] Concrete is a building material produced by mixing cementitious materials, coarse and fine aggregates, and water, and then undergoing certain processes, such as pouring, vibrating, curing, and repairing. Concrete material has become one of the construction engineering materials with the largest amount and the widest range of use in construction engineering due to its good performance. With the advancement of urbanization in our country, super-high, super-deep and super-large-scale construction projects continue to emerge, which put forward higher requirements for concrete technology. Lightweight concrete, also known as foam concrete, is to fully foam the foaming agent mechanically through the foaming system of the foaming machine, and mix the foam and ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B38/08C04B28/04
CPCC04B38/10C04B38/08C04B28/04C04B2111/00293C04B14/06C04B14/02C04B18/142C04B18/08C04B18/141C04B14/28C04B18/24C04B14/106C04B24/34C04B22/10C04B24/20C04B14/104C04B14/185C04B2103/302C04B24/2652C04B24/383
Inventor 陈志鹏卢振华张振礼范阳杰
Owner 北京城建九混凝土有限公司
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