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Method for detecting durability of prefabricated building sealant in extreme environment

A technology of extreme environment and detection method, applied in the direction of applying stable tension/pressure to test material strength, measuring device, adopting mechanical device, etc., can solve the problem of not considering the comprehensive effect of sealants, etc., and achieve easy detection method and simple structure Reasonable, accurate and reliable test data

Pending Publication Date: 2022-07-29
JIANGSU TESTING CENT FOR QUALITY OF CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current sealant-related standards and specifications have not yet fully considered the impact of harsh climate environments on the long-term performance of sealants. Influenced by factors such as tension and tension-compression cycles; "Silicon and modified silicone building sealants" GB / T 14683 adds the test method of adhesion after ultraviolet radiation
These methods have certain limitations, and do not consider the comprehensive effects of many factors in the natural climate environment on the sealant.

Method used

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  • Method for detecting durability of prefabricated building sealant in extreme environment
  • Method for detecting durability of prefabricated building sealant in extreme environment
  • Method for detecting durability of prefabricated building sealant in extreme environment

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Embodiment 1

[0028] The present invention provides a method for detecting the durability of prefabricated building sealants in extreme environments, including:

[0029] (1) The sealant to be tested is made into an I-shaped test piece according to the requirements of "Sealant for Concrete Building Joints" JC / T 881, the base material is cement mortar board, and the number of test pieces is made according to 4 pieces / group. 8 groups of test pieces; all test pieces use matching primer;

[0030] (2) The above-mentioned specimens were cured under standard conditions for 28 days. After curing, each group of specimens was drenched with water until saturated with water, and then embedded in a 300×300×30mm XPS foam insulation board to make a test specimen to be tested. like structure;

[0031] (3) Put the above-mentioned sample structure to be tested into the thermal conductivity meter, set the temperature of the cold plate to -20°C and the temperature of the hot plate to 20°C to simulate the tempe...

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Abstract

The invention discloses a method for detecting durability of a prefabricated building sealant in an extreme environment. The method comprises the following steps: firstly, preparing I-shaped test pieces, taking a cement mortar plate as a base material, manufacturing four test pieces in each group, and embedding each group of test pieces into a heat insulation plate to prepare a to-be-detected sample structure; secondly, putting the to-be-detected sample structure into a heat conductivity coefficient instrument, and carrying out a tensile cohesiveness test under the simultaneous action of internal and external temperature difference, wetting and drying alternation and high and low temperature circulation. According to the invention, the cracking action of the sealant for the prefabricated building exposed in an extreme environment is accurately simulated, so that the detection data is more accurate and reliable; the detection device is simple and reasonable in structure, and the detection method is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of prefabricated buildings and green building materials, and particularly relates to a method for detecting the durability of prefabricated building sealants under simulated extreme natural environments (freeze-thaw-high-low-temperature-dry-wet alternate cycle). Background technique [0002] The prefabricated building is a new type of building that can integrate multiple industrial chains such as construction and industry. In recent years, under the promotion of multiple factors such as social and economic development, the transformation and upgrading of the construction industry, the vigorous promotion of national and local policies, the shortage of human resources, and rising labor costs, prefabricated buildings have developed rapidly in my country. In February 2016, the State Council's "Several Opinions on Further Strengthening the Management of Urban Planning and Construction" put forward: "vigorously pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N25/00G01N19/04G01N3/08
CPCG01N17/00G01N25/00G01N19/04G01N3/08G01N2203/0003G01N2203/0017G01N2203/0075
Inventor 蒋俣魏晓斌孙正华刘蓉金刚
Owner JIANGSU TESTING CENT FOR QUALITY OF CONSTR ENG
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