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Method for rapidly predicting dry density, out-of-kettle moisture content and water absorption rate of aerated concrete

A technology of aerated concrete and water absorption, applied in the field of building materials, can solve the problems of high heating temperature, long processing time, damage to the internal structure of aerated concrete, etc., and achieve the effect of simple test process

Active Publication Date: 2020-04-10
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this test method requires multiple heating treatments, each treatment takes a long time, and the heating temperature is high, which will cause irreversible damage to the internal structure of the air-entrained concrete, so the measured dry density, moisture content and Water absorption is also not accurate
In addition, the structure of the test piece is damaged during the test, and the test piece cannot be used in actual engineering after the test, resulting in waste of materials

Method used

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  • Method for rapidly predicting dry density, out-of-kettle moisture content and water absorption rate of aerated concrete
  • Method for rapidly predicting dry density, out-of-kettle moisture content and water absorption rate of aerated concrete
  • Method for rapidly predicting dry density, out-of-kettle moisture content and water absorption rate of aerated concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A certain batch of air-entrained concrete is measured according to the method for rapidly predicting the dry density of the air-entrained concrete, the moisture content and the water absorption rate after leaving the kettle provided by the present invention.

[0035] The measurement results are as follows:

[0036] The calculation results when a=1.8 are shown in the table below:

[0037]

[0038] The calculation results when a=2.0 are shown in the table below:

[0039]

[0040] The calculation results when a=2.2 are shown in the table below:

[0041]

[0042] Based on the above data, the dry density of the air-entrained concrete, the water content and water absorption after leaving the kettle are shown in the following table:

[0043]

[0044] According to GB / T11969-2008 "Autoclaved Air-entrained Concrete Performance Test Method", the dry density, water content and water absorption of the air-entrained concrete specimens were measured.

[0045] The measur...

Embodiment 2

[0051] Another batch of air-entrained concrete was measured according to the method for quickly predicting the dry density of air-entrained concrete, water content and water absorption rate after exiting the kettle, and the measurement results are as follows:

[0052] The calculation results when a=1.8 are shown in the table below:

[0053]

[0054] The calculation results when a=2.0 are shown in the table below:

[0055]

[0056] The calculation results when a=2.2 are shown in the table below:

[0057]

[0058] Based on the above data, the dry density of the air-entrained concrete, the water content and water absorption after leaving the kettle are shown in the following table:

[0059]

[0060] According to GB / T11969-2008 "Autoclaved Air-entrained Concrete Performance Test Method", the dry density, water content and water absorption of the air-entrained concrete specimens were measured. The measurement results are shown in the table below:

[0061]

[0062] F...

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Abstract

The invention discloses a method for rapidly predicting dry density, out-of-kettle moisture content and a water absorption rate of aerated concrete. The method belongs to the field of new building materials. The method comprises the steps of measuring the size and mass of an aerated concrete test block which is just taken out of a kettle and the mass of the test block reaching saturated water absorption. According to the method, the rapid prediction of the dry density, the out-of-kettle moisture content and the water absorption rate of the aerated concrete are achieved, the problems of long time consumption and complex process of a standard test method are solved, and a new method is provided for product quality management and construction quality control.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for quickly predicting the dry density, water content and water absorption rate of aerated concrete. Background technique [0002] Dry density, moisture content and water absorption are important technical indicators of aerated concrete, which directly affect the strength, impermeability, carbonation resistance, shrinkage and deformation of aerated concrete. [0003] At present, the dry density, moisture content and water absorption of air-entrained concrete are mainly tested according to the methods given in GB / T11969-2008 "Methods for Performance Test of Autoclaved Air-entrained Concrete". Specifically, put the test piece in an electric blast drying oven, keep it warm at (60±5)°C for 24h, then keep it at (80±5)°C for 24h, and then bake it at (105±5)°C until constant mass . After the test piece is cooled to room temperature, put it into a consta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02G01N9/36G01N9/02
CPCG01N5/025G01N9/02G01N9/36G01N2009/024
Inventor 蒋亚清潘亭宏孟凡旭王玉黄鹤
Owner HOHAI UNIV
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