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Foam concrete containing recycled inorganic lightweight aggregate and preparation method thereof

A foam concrete and lightweight aggregate technology, which is applied in ceramic products, other household appliances, sustainable waste treatment, etc., can solve the problems of uneven quality of EPS lightweight aggregate concrete, non-utilization of products, low strength of foam concrete, etc. , to achieve high value-added utilization of resources, significant economic and social benefits, and good mobility

Inactive Publication Date: 2016-07-20
GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN201310243692.8 discloses lightweight aggregate foamed concrete and its production method. The lightweight aggregate used is one or more of perlite, vitrified microbeads, and ceramsite. These light aggregates are ordinary lightweight aggregates. The mining of inorganic mineral resources or high-pour calcination wastes resources and energy. In addition, the light aggregate foam concrete invented has low strength (0.3MPa) and is easy to shrink and crack. It is not suitable for wall and non-load-bearing structures. in construction
[0004] CN201210098747.6 discloses EPS light aggregate concrete and its preparation method. The light aggregate used is EPS, and the EPS has a low fire rating, so there are potential safety hazards in structures such as walls. In addition, the quality of EPS light aggregate concrete is uneven, EPS Easy to float, poor fluidity, not suitable for cast-in-place foam concrete projects

Method used

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Examples

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preparation example Construction

[0032] The preparation method of recycled inorganic lightweight aggregate is as follows:

[0033] method 1:

[0034] 1) Inorganic thermal insulation building material waste is collected and classified, and classified and stacked according to four categories: aerated concrete waste, foamed concrete waste, foamed ceramic waste, and foamed glass waste.

[0035] 2) Use a crusher to classify and crush inorganic thermal insulation building material waste into lightweight aggregates. More than 95% of the crushed particles have a particle size range of 0-20mm.

[0036] 3) Use a multi-stage screening machine to classify, sieve and collect the crushed lightweight aggregate. The sieve hole sizes are 20.0mm, 4.75mm, and 0.15mm. Among them, the 20.0mm sieve needs to return to step 2) for crushing and sieving, the 4.75mm sieve is coarse aggregate, and the 0.15mm sieve is fine aggregate.

[0037] Method 2:

[0038] 1) Inorganic thermal insulation building material waste is collected and c...

Embodiment 1

[0042] Ordinary Portland cement 40 parts, slag 60 parts, water reducing agent 1.0 part, fiber 0.1 part, water 40 parts. The amount of foam added accounts for 1% of the total volume of foam concrete, and the amount of recycled lightweight aggregate accounts for 80% of the total volume of foam concrete.

[0043] The preparation method of recycled lightweight aggregate foam concrete comprises the following steps:

[0044] (1) Weigh cement, slag, water reducer, fiber, recycled lightweight aggregate, foaming agent and water according to the mix ratio;

[0045] (2) Pour cement, slag, water reducer and fiber into the mixer and stir evenly to obtain dry material;

[0046] (3) Add water and water reducer to the dry material and stir evenly;

[0047] (4) Add the recycled lightweight aggregate and stir evenly to make a slurry;

[0048] (5) Mix the foaming agent and water into the foaming machine in proportion, control the foaming pressure within the range of 0.5MPa~1.0MPa, and the len...

Embodiment 2

[0051] 60 parts of ordinary Portland cement, 40 parts of slag, 3 parts of water reducing agent, 0.8 parts of fiber, 25 parts of water, the amount of foam added accounts for 80% of the total volume of foam concrete, and the amount of recycled lightweight aggregate accounts for the total volume of foam concrete 1%.

[0052] The preparation method is the same as in Example 1.

[0053] The dry bulk density of the resulting recycled inorganic lightweight aggregate foamed concrete is 520kg / m 3 , The 28-day strength is 4.2Mpa, the thermal conductivity is 0.078w / (m K), the linear shrinkage is 0.28%, the water absorption is 8%, the bulk density difference is 3.5%, and the fluidity of the foam concrete slurry is 185mm.

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Abstract

The invention discloses foam concrete containing recycled inorganic lightweight aggregate. The foam concrete is prepared from 20-60 parts of cement, 20-60 parts of slag, 0-50 parts of sand, 0.5-3 parts of a water reducer, 0.1-3 parts of fibers, 25-60 parts of water, foam with the addition amount accounting for 1-80% of the total volume of the foam concrete and the recycled inorganic lightweight aggregate with the addition amount accounting for 1-80% of the total volume of the foam concrete, wherein the recycled inorganic lightweight aggregate is obtained by smashing, screening and grading one or more inorganic heat insulation building materials including but not limited to aerated concrete, foam concrete, foamed ceramic and foamed glass. The invention further discloses a preparation method of the foam concrete. The foam concrete containing the recycled inorganic lightweight aggregate has the advantages of being high in strength, small in shrink, free of formwork collapse, good in fluidity, homogeneous, low in cost and the like and is especially suitable for cast-in-situ lightweight walls, roofs, lightweight cement product elements and the like.

Description

technical field [0001] The invention relates to a lightweight energy-saving building material and a preparation method thereof, in particular to a foam concrete containing recycled inorganic light aggregate and a preparation method thereof. Background technique [0002] In recent years, driven by building energy-saving policies, building energy-saving technologies and energy-saving materials have developed rapidly. In order to meet the requirements of building energy conservation and environmental protection, the wall insulation materials currently produced with organic polymers as the main raw material are not suitable for fire protection and environmental protection requirements, and are gradually replaced by inorganic heat insulation materials. Foamed concrete has the advantages of light weight, heat preservation, heat insulation, sound insulation, non-combustibility, earthquake resistance, waste utilization, etc. It can well meet the requirements of building energy savin...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/02C04B18/16C04B14/22C04B111/28
CPCC04B14/22C04B18/165C04B18/167C04B28/04C04B38/02C04B2111/285C04B2201/20C04B2201/32C04B2201/50C04B18/141C04B14/06C04B2103/302C04B16/0633Y02W30/91
Inventor 李建新谭上飞陈培鑫费飞龙陈耿李晓深王新祥王元光
Owner GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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