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
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[0032] The preparation method of recycled inorganic lightweight aggregate is as follows:
[0033] method 1:
[0034] 1) The collection and classification of waste inorganic insulation building materials are classified and stacked according to four categories: aerated concrete waste, foam concrete waste, foamed ceramic waste, and foamed glass waste.
[0035] 2) Use a crusher to classify and crush waste inorganic insulation building materials into light aggregates. More than 95% of the particles obtained by crushing have a particle size range of 0-20mm.
[0036] 3) Use a multi-stage sieving machine to classify and collect the crushed lightweight aggregates. The screen holes are 20.0mm, 4.75mm, and 0.15mm. Among them, the 20.0mm sieve residue needs to be returned to step 2) for crushing and screening, the 4.75mm sieve residue is coarse aggregate, and the 0.15mm sieve residue is fine aggregate.
[0037] Method 2:
[0038] 1) The collection and classification of waste materials for inorganic...
Example Embodiment
[0041] Example 1
[0042] 40 parts of ordinary Portland cement, 60 parts of slag, 1.0 part of water reducing agent, 0.1 part of fiber, 40 parts of water. The addition of foam accounts for 1% of the total volume of foam concrete, and the addition of recycled lightweight aggregate accounts for 80% of the total volume of foam concrete.
[0043] The preparation method of recycled lightweight aggregate foamed concrete includes the following steps:
[0044] (1) Weigh cement, slag, water reducing agent, fiber, recycled lightweight aggregate, foaming agent and water according to the mixing ratio;
[0045] (2) Pour cement, slag, water reducing agent and fiber into a mixer and mix evenly to obtain a dry material;
[0046] (3) Add water and water reducing agent to the dry material and stir evenly;
[0047] (4) Add recycled lightweight aggregates and stir evenly to make slurry;
[0048] (5) Mix the foaming agent and water into the foaming machine in proportion, control the foaming pressure within th...
Example Embodiment
[0050] Example 2
[0051] 60 parts of ordinary Portland cement, 40 parts of slag, 3 parts of water reducer, 0.8 parts of fiber, 25 parts of water, the addition of foam accounts for 80% of the total volume of foam concrete, and the addition 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 obtained recycled inorganic lightweight aggregate foamed concrete is 520kg / m 3 , 28 days strength 4.2Mpa, thermal conductivity 0.078w / (m·K), linear shrinkage rate 0.28%, water absorption rate 8%, bulk density difference 3.5%, foam concrete slurry fluidity 185mm.
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