Method for preparing lightweight aggregate concrete
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A technology of lightweight aggregate and preparation method, applied in the field of building materials, can solve the problems of low tensile strength, easy cracking, high brittleness, etc., and achieve the effect of avoiding segregation and wide application range
Active Publication Date: 2019-08-06
GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC +1
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[0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a preparation method of lightweight aggregate concrete, which can effectively absorb phosphate slag, and can effectively solve the problem of low tensile strength of concrete materials in the prior art, easy to Technical problems such as cracking and brittleness
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Embodiment 1
[0016] A kind of preparation method of lightweight aggregate concrete of the present invention, comprises the following steps:
[0017] 1. Preparation of cementitious material slurry: said cementitious material slurry is formed by mixing cementitious material, water and admixture, and its proportion is cementitious material: water: admixture=1:0.3:0.005, The cementitious material is mixed with cement and mineral admixtures, wherein cement accounts for 40%, and the rest is mineral admixtures. The mineral admixtures are made of fly ash, slag powder, phosphorus slag powder and silicon powder The cement is Portland cement with a grade of 42.5 or higher, the fly ash meets the requirements of grade II or higher, the phosphorous slag powder meets the requirements of L75 or higher, and the slag powder meets the requirements of S95 or higher.
[0018] 2. Preparation of large flow mortar: large flow mortar is made by stirring and mixing cementitious material, sand, water and admixture, ...
Embodiment 2
[0021] A kind of preparation method of lightweight aggregate concrete of the present invention, comprises the following steps:
[0022] 1. Preparation of cementitious material slurry: said cementitious material slurry is formed by mixing cementitious material, water and admixture, and its proportioning is cementitious material: water: admixture=1:0.5:0.005, The cementitious material is mixed by cement and mineral admixture, wherein cement accounts for 60%, and the rest is mineral admixture, and described mineral admixture is made of fly ash, slag powder, phosphorus slag powder and silicon powder Mixed; the cement is Portland cement with a grade of 42.5 or higher, the fly ash meets the requirements of grade II or higher, the phosphorous slag powder meets the requirements of L75 or higher, and the slag powder meets the requirements of S95 or higher.
[0023] 2. Preparation of large flow mortar: large flow mortar is made by stirring and mixing cementitious material, sand, water a...
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Abstract
The invention discloses a method for preparing lightweight aggregate concrete. The method comprises the following steps: wetting the surface of lightweight aggregate, mixing a cementing material withthe lightweight aggregate in a coating manner to form a thin layer of a cementing material slurry on the surface of the aggregate, performing uniform mixing, ram-molding the obtained mixture in a moldto form macro-porous sandless lightweight concrete, allowing the macro-porous sandless lightweight concrete to become hard in order to prepare a high-fluidity mortar, filling the macro-porous sandless lightweight concrete with the high-fluidity mortar, and vibrating and exhausting the circumference of the mold to finally obtain lightweight aggregate concrete. The lightweight aggregate is integrally connected through a small amount of the cementing material slurry to form the macro-porous sandless lightweight aggregate concrete, and then the high-fluidity mortar is injected to permeate the gapgaps in the lightweight aggregate, and the cementing material in the lightweight aggregate is solidified and molded to make the lightweight aggregate not float upwards, so the technical problem of upward floatation of ceramsite in the lightweight aggregate concrete is completely solved.
Description
technical field [0001] The invention relates to a preparation method of lightweight aggregate concrete, which belongs to the technical field of building materials. Background technique [0002] Due to its technical advantages such as easy construction, light weight, good thermal insulation, and strong durability, lightweight aggregate concrete is widely used in roof insulation and wall structures in the construction field. The traditional method is to mix the cementitious material, water, sand, lightweight aggregate, and admixture together evenly and then carry out on-site construction. The technical difficulty of "floating" the ceramsite in the mixture has not been effectively solved. Chinese invention patents "Preparation method and device for pressure-filled ceramsite foam concrete", "A self-insulating lightweight wallboard containing hollow ceramsite and its preparation method", "Used for the production of ceramsite foamed concrete prefabrication Parts of the mold and t...
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Application Information
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