Specimens with dimensions of 40 120 200 mm3 were prepared for the thermal conductivity and thermal performance tests.
A thermal conductivity meter (QTM 500) was used for measuring thermal conductivities of the specimens that were cured in air for 28 days. After that, the specimens were further used for the overall thermal performance evaluation by using the experimental setup schematically shown in Fig. 3. In this test, specimens were firstly exposed to heat radiation from a 275W infrared lamp for 150 min; afterwards, they were naturally cooled to room temperature without any cooling auxiliaries. As shown in Fig. 3, the temperature developments of the specimen lower surface(TLS) and the air inside the specimen holder box (TIA) were recorded by a data logger-computer system. All the temperature data were recorded in 1 s time steps.