TY - JOUR
TI - Study on the corrosion resistance of early-strength coal gangue-based sprayed composite materials
AU - Bi Xiao-Xi
AU - Xia Jun-Wu
AU - Qiu Pei-Tao
AU - Zhang Zhi-Jun
AU - Ma Yan-Mei
JN - Thermal Science
PY - 2025
VL - 29
IS - 2
SP - 1497
EP - 1502
PT - Article
AB - On the basis of the basic performance research of gangue aggregate, the early  strength sprayed composite material was prepared by using gangue to  completely replace the aggregate and sulphoaluminate cement as the  cementitious material, and its corrosion resistance was studied. The  research results show that the early strength gangue-based sprayed  composite material (RSCG) has good working performance. With the increase of  corrosion time, the strength of RSCG gradually decreases. The main corrosion  components are gypsum (CaSO4•2H2O) and calcium sulfonate. The expansion  products are generated and expanded in smaller capillaries, which is the  main reason for the generation and expansion of cracks. Based on the  experimental research, the equation of the corrosion reaction of  gangue-based sprayed composite material and the surface sulfate ion  concentration equation are given.