A kind of preparation method of lightweight aggregate concrete

A lightweight concrete and lightweight aggregate technology, applied in the field of building materials, can solve problems such as low tensile strength, easy cracking, and high brittleness, and achieve the effect of avoiding segregation and having a wide range of applications

Active Publication Date: 2021-09-10
GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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Examples

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Effect test

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 formed by mixing cement and mineral admixtures, wherein cement accounts for 60%, and the rest is mineral admixtures. The mineral admixtures are composed 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, w...

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Abstract

The invention discloses a preparation method of lightweight aggregate concrete. The method is to first wet the surface of lightweight aggregate, and then use cementitious material slurry to mix with lightweight aggregate in a slurry-coated manner, so that A thin layer of cementitious material slurry is formed on the surface of the aggregate. After mixing evenly, it is inserted into the mold to form a large-pore sand-free lightweight concrete. After it hardens, a large-flowing mortar is prepared and poured into the large-pore sand-free light In concrete, vibrate and exhaust around the mold, and finally obtain lightweight aggregate concrete. In the present invention, the lightweight aggregates are first integrated through a small amount of cementitious material slurry to form a large-porous sandless lightweight aggregate concrete, and then the mortar with a large fluidity is poured into the gaps between the lightweight aggregates. The cementitious material slurry in the space has been solidified and formed, and the lightweight aggregate cannot float up, which completely solves the technical problem of ceramsite floating in lightweight aggregate concrete.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/08
CPCC04B28/04C04B2111/40C04B18/08C04B18/145C04B18/141C04B18/146C04B14/06C04B18/027C04B2103/0068
Inventor 卢云祥徐立斌罗通陈尚伟朱国良陈亦苏何信周廖昶
Owner GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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