Feasibility of active and passive thermal control application for defect identification of building materials and products, enclosures of construction objects

Denis Karpov,Daniya Zaripova,Mikhail Pavlov,V.A Golenishchev-Kutuzov

doi:10.1051/e3sconf/202128801101

Denis Karpov, Daniya Zaripova + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/202128801101

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Abstract

This paper considers one of the most promising and modern methods of non-destructive testing - thermal control. The possibilities and advantages of thermal control for identifying defects of various building materials and products, enclosures of buildings and structures are presented. Brief characteristics of the main defects of building materials, products, and structures are presented. The basic principles of identifying hidden (invisible) and explicit (visible) defects are briefly considered and the practical results of construction defect identification of objects for various purposes using thermal imaging equipment are presented. The zones of thermal temperature anomalies are localized during qualitative analysis of thermograms (the method of active thermal control). The considered example is a fragment of a building enclosure made ceramic bricks with artificially created technical defects. For some enclosures of building structures and constructions, explicit thermal defects were identified from thermal imaging, their qualitative analysis was carried out, and recommendations for their elimination were proposed (method of passive thermal control).

Highlights

Non-destructive testing (NDT) is designed to check the reliability of the test object, its individual elements and structures using gentle methods that do not require cardinal dismantling or temporary disabling [1,2,3,4]
Depending on the physical processes which it is based on, NDT is subdivided into 10 main types, one of which is temperature control (TC), which is the theme of the present paper [5,8,9,10]
Consider a variant of the active TC of a fragment of a building enclosure made of piece building products with artificially created technical defects in the form of a heat-conducting connector and a vertical crack (Figure 3)

Summary

Introduction

Non-destructive testing (NDT) is designed to check the reliability of the test object, its individual elements and structures using gentle methods that do not require cardinal dismantling or temporary disabling [1,2,3,4]. NDT is based on the methods and means of control the physical principles of which do not worsen the serviceability and do not violate the integrity of the controlled objects [5,6,7]. The current regulatory documents laconically define NDT as a control that does not destroy. Depending on the physical processes which it is based on, NDT is subdivided into 10 main types (magnetic, electrical, vibration, etc.), one of which is temperature control (TC), which is the theme of the present paper [5,8,9,10]. The choice of instruments and tools for NDT depends on the tasks set, the selected method and parameters of the test object (damage, thickness of wall or coating, etc.). TC based on the conversion of infrared radiation into the visible spectrum is performed using the following equipment: thermal imager, pyrometer, data loggers, temperature and heat flux density meters, various mechanical means (thermal pencils, heat-dissipating paste, high-temperature paint, etc.) [5,6]

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