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利用粉磨至不同比表面积的转炉钢渣微细粉取代部分水泥进行了C40砼的3 d和28 d抗压强度及坍落度试验,考察了钢渣微细粉比表面积及掺入量、水胶比和减水剂掺入量对砼性能的影响,并用PoreMaster-60孔测定仪测定了硬化砼的孔分布。试验结果表明,钢渣微细粉比表面积为450 m2/kg、掺入量为15％～20％时,可获得令人满意的砼3 d和28 d抗压强度;随着水胶比的增大,砼3 d和28 d抗压强度显著降低,坍落度明显增大;减水剂掺入量对砼坍落度影响显著,但对砼强度影响不大。
The compressive strength and slump of C40 concrete were measured by using the fine powder of converter slag which was ground to different specific surface areas. The compressive strength and the slump of C40 concrete were investigated. The results showed that the specific surface area, The influence of the amount of water reducer on the properties of concrete was investigated. The pore distribution of hardened concrete was measured by PoreMaster-60 apparatus. The test results show that the satisfactory compressive strength of concrete for 3 days and 28 days can be obtained when the specific surface area of slag powder is 450 m2 / kg and the blending amount is 15% ~ 20%. With the increase of water-cement ratio , The compressive strength of concrete decreased significantly on the 3rd and 28th day, and the slump of the concrete increased obviously. The amount of superplasticizer had a significant effect on the slump of concrete, but had little effect on the concrete strength.