Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for predicting crack resistance of aerated concrete

A technology of air-entrained concrete and anti-crack performance, which is applied in the field of building materials to achieve the effect of visual crack resistance, intuitive and easy-to-understand methods, and clear physical meaning

Active Publication Date: 2020-05-15
HOHAI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the current evaluation methods can meet the above conditions.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for predicting crack resistance of aerated concrete
  • Method for predicting crack resistance of aerated concrete
  • Method for predicting crack resistance of aerated concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] For a certain batch of air-entrained concrete samples, the moisture content, water absorption rate, equilibrium moisture content, drying shrinkage value, splitting tensile strength, and tensile modulus of elasticity are shown in the table below, and the cracking risk coefficient η is calculated according to formula (1), Determine whether the air-entrained concrete is cracked.

[0033] The comparison between the observed results and the calculated results in the test is shown in the table below:

[0034]

[0035] It can be seen from the above table that in Example 1, the experimentally measured results are basically consistent with the calculated and predicted results, and a method for predicting the crack resistance of air-entrained concrete proposed in the present invention has high precision and high feasibility.

Embodiment 2

[0037] For another batch of air-entrained concrete samples, the water content, water absorption, equilibrium water content, drying shrinkage, splitting tensile strength, and tensile modulus of elasticity are shown in the table below, and the cracking risk coefficient η is calculated according to formula (1), Determine whether the air-entrained concrete is cracked.

[0038] The comparison between the observed results and the calculated results in the test is shown in the table below:

[0039]

[0040] It can be seen from the above table that in Example 2, the experimentally measured results are basically consistent with the calculated and predicted results, and a method for predicting the crack resistance of aerated concrete proposed in the present invention has high precision and high feasibility.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for predicting the crack resistance of aerated concrete, belonging to the field of new building materials. According to the method comprises, the moisture content, thewater absorption rate, the balanced moisture content, the drying shrinkage value, the splitting tensile strength and the tensile elastic modulus of aerated concrete are measured, and based on an established drying shrinkage calculation model, the cracking risk of the aerated concrete is predicting by taking a ratio of the bearable tensile stress of the aerated concrete to tensile stress caused bydrying shrinkage as a cracking risk coefficient, so the crack resistance of the aerated concrete can be judged. The method for predicting the crack resistance of the aerated concrete is suitable forquality management in the construction period of a building wall and control over the moisture content of the aerated concrete in the construction process.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for predicting the anti-crack performance of air-entrained concrete. Background technique [0002] Air pores are artificially introduced in the production of air-entrained concrete, and their positions in the matrix are random and disordered. However, while these special structures bring good properties such as light weight insulation and high specific strength, they also have problems such as strong water absorption, large water loss shrinkage, and cracks in masonry. [0003] Due to its special structure, the water shrinkage problem of air-entrained concrete has limited its application range and quantity. Thus, to some extent, the tensile strength of air-entrained concrete should be given equal attention to its compressive strength. In practice, there is no requirement for tensile strength in the standard of air-entrained concrete, but cracking ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G16C60/00
CPCG16C60/00
Inventor 蒋亚清王玉辛忠毅吉旭平刘小艳
Owner HOHAI UNIV