Chemical foamed concrete and preparation method thereof
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A foaming concrete and chemical foaming technology, applied in the field of building materials, can solve the problems of long molding speed, uneven foam diameter, poor heat preservation effect, etc., and achieve stable foaming speed, uniform foam diameter, sound insulation and heat insulation Good results
Inactive Publication Date: 2014-12-31
LIAONING JIJIA ENERGY SAVING WALL EQUIP
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[0004] At present, the main foamed concrete technology is mainly divided into two categories, one is physical foaming, that is, the air bubbles generated are mechanically driven into the slurry, and then become thermal insulation materials after stirring, pouring and curing, such as the Chinese patent ( Publication No.: CN101565289A, Invention Name: Tailings Foamed Concrete) discloses a high-pressure foaming process of tailings powder, and a Chinese patent (Publication No.: CN102731048A, Invention Name: alkali slag foamed cement product and its preparation method) discloses A method for producing alkali slag foamed cement; the foaming technology provided in the disclosure is all physical foaming, which has the disadvantages of slow foaming, long molding speed, uneven foam diameter, poor heat preservation effect, and low mechanical strength. The other is chemical foaming, adding chemical foaming agents, such as aluminum powder, hydrogen peroxide, etc., to the slurry, and using the gas generated by the chemical reaction in the slurry to foam. The disadvantage is that the foaming speed is fast. , difficult to control
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Embodiment 1
[0028] Embodiment 1 (the amount of cement and tailings powder in the two embodiments is not within the scope of the claims and needs to be modified)
[0029] Provide a kind of foam concrete material, comprise cementitious material, blowing agent, compound admixture and water, the mass fraction of described component is:
[0030]
[0031] Its process steps are as follows:
[0032] Mix the cementitious material and compound admixture evenly to form a mixed dry material;
[0033] Stir the mixed dry material and water evenly at 40°C to form cement slurry;
[0034] Add hydrogen peroxide solution (30wt%) to the cement slurry, stir rapidly for 60s, place it in the mold, foam at room temperature, and demould after hardening and molding, and the foamed concrete product is obtained.
[0035] The test data is as follows:
[0036] 28d compressive strength 3.61MPa, bulk density 387kg / m 3 , thermal conductivity 0.06W / (m·k).
Embodiment 2
[0038] Provide a kind of foam concrete material, comprise cementitious material, blowing agent, compound admixture and water, the mass fraction of described component is:
[0039]
[0040]
[0041] Its process steps are as follows:
[0042] Mix the cementitious material and compound admixture evenly to form a mixed dry material;
[0043] Stir the mixed dry material and water evenly at 35°C to form cement slurry;
[0044] Add hydrogen peroxide solution (30wt%) to the cement slurry, stir rapidly for 60s, place it in the mold, foam at room temperature, and demould after hardening and molding, and the foamed concrete product is obtained.
[0045] The test data is as follows:
[0046] 28d compressive strength 3.59MPa, bulk density 390kg / m 3 , thermal conductivity 0.069W / (m·k).
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Abstract
The invention discloses a chemical foamed concrete and a preparation method thereof. The concrete product is prepared by using a cementing material, a foaming agent, a compounded additive and water as raw materials through a chemical foaming principle, and the added compounded additive realizes stable foaming speed stability, uniform bubble diameter and controllability. The chemical foaming preparation method has the advantages of simplicity, low production investment cost, and convenient construction. The foamed concrete product prepared in the invention has the advantages of fireproof property, waterproof property, sound insulation, heat insulation, light weight, high compressive strength and environmental protection. The bulk density, the compressive strength and the heat conduction coefficient of the obtained product are less than 400kg / m<3>, more than 3.5MPa and less than or equal to 0.07W / (M.K) respectively. The above formula adopting alkaline ash comprising alkaline furnace ashes, alkaline slag, alkaline furnace slag and other wastes as raw materials realizes comprehensive utilization of resources, changes wastes into valuables, and accords with the demands of sustainable development of national circular economy.
Description
technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a chemically foamed concrete and a preparation method thereof. The prepared chemically foamed concrete is used to manufacture building material products such as building non-load-bearing walls, external thermal insulation boards, and lightweight partition boards. Background technique [0002] In recent years, fires caused by the burning of organic insulation materials have occurred in the new CCTV site, China Science and Technology Museum, Jinan Olympic Sports Center, etc., causing serious losses to people's lives and property. Organic insulation materials have become a new type of fire hazard. However, most of the inorganic thermal insulation materials currently on the market have disadvantages such as single structure, instability, uneven cell diameter, low porosity, high thermal conductivity, low compressive strength, poor thermal insulation and sound ins...
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