What material is used for cable ditch cover plate, which is safe and cheap?

There are many kinds of materials for cable ditch cover plate: steel fiber concrete, composite resin, regeneration of resin, polymer-based composite materials, etc. Steel fiber is bulky and inconvenient to construct or maintain, but the price is the cheapest. Regeneration of resin and polymer-based composite materials are poor in temperature resistance, brittle in winter, easy to expand in summer, poor in application effect, short in service life and higher in price than steel fiber concrete. Composite resin material, usually called BMC, mainly uses unsaturated resin, chopped glass fiber, filament and some fillers, and matches the steel skeleton. The product has stable performance, strong temperature resistance, acid and alkali resistance, compression resistance, bending resistance, impact resistance and flame retardancy, and its price is relatively higher than that of steel fiber concrete, regeneration of resin and polymer-based composite materials, but from the service life and product performance, it has higher cost performance. Jiangsu Taizhou Shengtong Composite Material Co., Ltd. specializes in producing composite resin cable ditch cover plate, which is the largest cable ditch cover plate manufacturer in Jiangsu. Your guidance is welcome, Mr. Wang Rongping. 138!