目前北京地区已使用的衬模以型钢衬模为主,其次是聚氯乙烯衬模、玻璃钢衬模等。聚氯乙烯衬模和玻璃钢衬模价格低,但耐蒸养性能差,硬度较大,易损坏周转次数少;型钢衬模应用较广泛,但图案变化小。为了使装饰混凝土的图案不断更新,就需采用价格适中、耐蒸养、周转次数多、经济耐 At present, the liners used in the Beijing area are mainly made of steel linings, followed by PVC linings, fiberglass linings and so on. Polyvinyl chloride liners and glass fiber reinforced plastic linings are low in price but poor in resistance to steam curing, they are harder, and they are less likely to be damaged. The steel liners are widely used, but their pattern changes are small. In order to keep the pattern of decorative concrete constantly updated, it is necessary to adopt moderate prices, steam curing, turnover times, and economical resistance.