The transient line source probe needle has become a very common tool for measuring the
thermal conductivities of soils and some rocks. However, field measurements using this technique can be difficult with densely packed soil and rock, as the process of inserting the probe can disturb the surrounding sample or damage the equipment. This article investigates the effects of drilling a hole ...
Author(s): Hee-Hwan Ryu, Jung Chan Choi, Ki-Il Song, Seunghun Baek, Sojeong Lee, Tae-Hyuk Kwon
The purpose of this study was to look at the effective thermal conductivity (ETC) of coking coal, sandstone and foamed concrete existing in extreme thermal environments. Thermal-physical properties were measured under various conditions: fully water saturated, after saturation during air-drying, and oven-drying at 105°C. Results showed thermal conductivity increased with increasing moisture content, and sandstone had the highest mean thermal conductivity value of the three materials....
Author(s): Guoqing Zhou, Pin-Qiang Mo, Rui Tang, Yijiang Wang, Zhaoxiang Chu
A comparative study was conducted on the properties of lightweight cementitious composites (LWCCs) mixed with four types of filler particles; EPS beads, dry-expanded plastic microspheres, hollow glass microspheres, and fly ash cenospheres. Thermal conductivity was tested using the transient plane source method. Results showed that thermal conductivity of LWCCs are dictated by the volume of lightweight functional filler (LWF) used and are insensitive to the type of LWF....
Author(s): Adam L. Brooks, Dominic Hanna, Hongyu Zhou
This paper summarizes the measuring method of thermal conductivity of rocks and the parameters controlling the transport and exchange of thermal energy. The transient plane source method was analyzed and found to have advantages over other methods, such as short test times and the ability to measure solid, liquid and powder materials. Thermal conductivity of rock was tested using an instrument. Results show thermal conductivity of rock in a saturate ...
Author(s): Chen Fei, Cui Guangjian, Miao Shengjun