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Changes of the insulation performance and deformation characteristics caused by temperature in the external thermal insulation system (ETICS) have a significant influence on its energy-saving effect. In this paper taking into account the temperature-dependence thermal material properties, the thermal contact resistance at the interface, and the elastic wave impedance, a bilayered structure model for insulation layer and the wall was established to study the nonlocal thermodynamic response. Based on the fractional order generalized thermoelasticity theory and introduced nonlocal dimension parameters, the solutions for insulation layer surface under harmonic temperature load were obtained. The effects of thermal contact resistance, nonlocal factor and fractional order parameter on the temperature, stress and displacement of the ETICS were analyzed. The results can provide theoretical support for solving the problem of deformation of the interface between the insulation layer and the wall. [ABSTRACT FROM AUTHOR]

The whole and layered T2 spectrum signals of the external thermal insulation composite system ETICS with rendering in the free water absorption process were tested by NMR technology. The water content and pore size distribution characteristics of the structural layer of ETICS during the water migration process were studied. The results show that the water content of the test specimen is proportional to the amplitude of the signal received after the NMR excitation. According to this the moisture migration process of the ETICS can be measured. The layered T2 spectrum test can obtain the water content and pore distribution of different structural layers of the ETICS. The volume of different pores of the ETECS has a bimodal distribution with the pore size, and the pore volume of the insulation material accounts for the vast majority of the total volume. [ABSTRACT FROM AUTHOR]