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在德国,有人曾将225号矿渣硅酸盐水泥中0～0.09毫米的部分(占总量2.5～20),用比面积为13000平方厘米/克的碳酸盐微粒代替,然后用这种水泥制成水泥净浆标准水泥砂浆和两种含砂混凝土试体。制备混凝土时的水泥耗用量为420公斤/米~3,水灰比为0.5。用0～7毫米的砂作集料,砂中0.2毫米的颗粒含量为5和18%。用2.5%碳酸盐微粒取代细粒子水泥时,在正常条件下硬化的水泥净浆试体,强度提高了25～30%;标准砂浆试体强度提高了10～20%。碳酸盐微粒掺加量提高至20%,水泥净
In Germany, some people have used 0 to 0.09 mm (2.5 to 20 in total) of sulphate portland cement as a replacement for carbonates with a specific area of 13,000 square centimeters per gram. Made of cement paste standard cement mortar and two kinds of sand concrete specimens. The cement consumption when preparing concrete is 420 kg/m 3 and the water-cement ratio is 0.5. With 0 to 7 mm of sand as the aggregate, the 0.2 mm particle content in the sand is 5 and 18%. When 2.5% carbonate particles are used to replace the fine-grained cement, the strength of cement paste hardened under normal conditions is increased by 25-30%; the strength of the standard mortar mortar is increased by 10-20%. Carbonate particulate additions increased to 20%, cement net