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一、矿渣硅酸盐水泥与普通硅酸盐水泥相比,具有早期强度(低)、耐热性较(好)、耐冻性较(差)、蒸汽养护时强度增长较(快)、干缩性较(大)和水化热较(低)的特性。二、钢筋混凝上结构中受力钢筋的保护层厚度为:1.厚度大于100毫米的墙和板:(15)毫米;2.梁和往受力筋:(25)毫米;3.有垫层的基础:(35)毫米;4.无垫层的基础:(70)毫米。三、使用插入式振捣器振捣混凝土时,浇筑层的厚度不应超过振捣捧作用部分长度的1.25倍;振捣
1. Compared with ordinary portland cement, slag portland cement has early strength (low), better heat resistance (good), better freeze resistance (poor), stronger (faster) strength when steam curing, and dry Scalability is greater (larger) than the heat of hydration (lower) characteristics. Second, the thickness of the protective layer of reinforced concrete in the reinforced concrete structure is: 1. The wall and the plate with the thickness greater than 100 mm: (15) mm; 2. The beam and the applied tendon: (25) mm; 3. There are The base of the cushion: (35) mm; 4. The foundation without cushion: (70) mm. Third, when vibrating concrete with a vibrator, the thickness of the pouring layer should not exceed 1.25 times the length of the vibrator.