复掺粉煤灰与矿渣粉的海工自密实高性能混凝土试验研究

为满足海洋环境下高性能混凝土的施工要求，开展了复掺粉煤灰与矿渣粉海工自密实高性能混凝土的试验研究。试验结果表明，在复掺粉煤灰和矿渣粉掺量为60%～70%的条件下，掺入20%～30%粉煤灰自密实混凝土具有较高的流动性、填充性、间隙通过性和抗离析性等工作性，满足自密实混凝土的施工要求；28 d抗压强度大于50 MPa，56 d的电通量小于1 000 C，90 d扩散系数小于1.5×10-12 m2/s，具有较高的抗压强度和抗氯盐侵蚀性能，满足海洋环境下抗氯盐侵蚀的耐久性要求。

Experimental study on high-performance self-compacting concrete for marine structure with fly ash and slag powder

To satisfy marine concrete construction, we carried out an experimental study on the high-performance self-compacting marine concrete with fly ash and slag powder. Experimental results show that the fluidity, filling ability, passing ability and segregation resistance of self-compacting concrete containing 20% to 30% fly ash are good when mineral admixtures content is from 60% to 70% and they can satisfy marine concrete construction. Moreover, its compressive strength in 28 days is greater than 50 MPa, charge passed in 56 days is less than 1000 C, and chloride penetration coefficient is under 1.5×10-12 m2/s. Its compressive strength and chloride resistance are high and thus it may be used in concrete structures of marine circumstance.