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随着建筑科技发展的日新月异,建筑行业使用的标准更新也在加快。一些沿用了几十年的建筑材料种类(名称)也悄然发生了变化。1,水泥将原有水泥标号改为强度等级,即水泥分32.5级、42.5和52.5级,水泥的新标准与国际接轨,采用国际单位。现在32.5级单位为MPa,原来的325单位为kg/cm~2,换算为:325 kg/cm~2=325×9.8N/(1/10000)m~2=31.85×10~6Pa=31.85 MPa≈32.5 MPao水泥强度的龄期一律定为3 d和28d,
With the rapid development of building science and technology, the standard used by the construction industry is also accelerating. Some of the building materials used for decades (name) have quietly changed. 1, the cement will be the original cement label changed to the intensity level, that cement 32.5, 42.5 and 52.5, the new standard cement with international standards, the use of international units. Now 32.5 units of MPa, the original 325 units kg / cm ~ 2, converted to: 325 kg / cm ~ 2 = 325 × 9.8N / (1/10000) m ~ 2 = 31.85 × 10 ~ 6Pa = 31.85 MPa ≈ 32.5 The age of MPao cement strength will be fixed at 3 d and 28 d,