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一、石棉水泥异形管件的研制 1.试验 (1)原材料及配合比石棉:芒崖、朝阳产的五级石棉。水泥:大同水泥厂产的425号普通硅酸盐水泥。石棉水泥配合比见表1。
First, the development of asbestos cement special-shaped pipe fittings 1. Test (1) raw materials and mix ratio of asbestos: Mang Ya, Chaoyang produced five asbestos. Cement: No. 425 Ordinary Portland Cement produced by Datong Cement Plant. The asbestos cement mix ratio is shown in Table 1.