TY  - EJOU
AU  - Zhang, Yiwen 
AU  - Xie, Jianjun 
AU  - Sun, Minghui 
AU  - Wang, Shaolong 
AU  - Xu, Tengfei 
AU  - Xu, Yonggen 
AU  - Ding, Xiaoqing 
AU  - Shi, Ying 
AU  - Zhang, Lei 

TI  - Preparation and Study of Borosilicate Foam Glass with High Thermal Insulation and Mechanical Strength
T2  - Journal of Renewable Materials

PY  - 2023
VL  - 11
IS  - 5
SN  - 2164-6341

AB  - Foam glass is a kind of green building material that is widely used because of its excellent thermal insulation and mechanical properties. In this study, the borosilicate foam glass was fabricated by powder sintering method using recycled soda lime waste glass, quartz, and borax as the primary raw materials. CaCO<sub>3</sub> was used as a foaming agent and Na<sub>2</sub>CO<sub>3</sub> as a flux agent. Results showed that as the quartz content decreases from 30 to 17.5 wt.% and borax content increases from 5 to 17.5 wt.%, the pore size, porosity, and thermal insulation of borosilicate foam glass increase significantly, while the compressive strength decreases slightly. When the content of quartz and borax are both 17.5 wt.%, borosilicate foam glass with outstanding performance can be prepared, whose pore distribution is uniform, mean pore size is 1.93 mm, total porosity is 83.44%, thermal conductivity is 0.0711 W/(m⋅K), and compressive strength is 2.37 MPa. Finally, the influences of foaming agent content, flux agent content, foaming temperature, and holding time on the pore structure and various properties of borosilicate foam glass were investigated by orthogonal test. According to the results, the foaming temperature has a significant effect, and appropriate foaming agent content, flux agent content, and holding time help to form a uniform pore structure, thereby improving the thermal insulation and mechanical strength of the borosilicate foam glass.
KW  - Foam glass; waste glass; thermal conductivity; compressive strength

DO  - 10.32604/jrm.2023.025127