摘要
研究了利用钢渣粉取代部分水泥和磨细石英砂制备C80预应力高强混凝土管桩的可行性。研究结果表明:在压蒸条件下,钢渣的活性能够被有效地激发,提高比表面积能显著提高钢渣的活性。采用比表面积为550 m2/kg的钢渣,胶凝材料中钢渣用量20%,水泥用量55%,磨细砂用量25%,采用高强管桩混凝土的配合比和生产制度,混凝土的压蒸强度可达89 MPa,不但能满足C80管桩混凝土的强度要求,而且超过了传统管桩混凝土(胶凝材料为70%水泥和30%磨细砂)的压蒸强度(83.9 MPa),也超过了同样矿渣掺量和配合比的管桩混凝土的压蒸强度(82.8 MPa)。X射线分析结果表明:在压蒸条件下,钢渣的强度活性得到了有效地激发。通过采用比表面积较大的钢渣以及优选钢渣的比例,应用钢渣来生产高强管桩混凝土是可行的。
Feasibility study of partial replacement of cement and ground sand by ground steel slag （GSS） in producing prestressed high strength concrete pile （PHC） was conducted.The results showed that, under autoclave curing condition （ 180 ℃, 1.0 MPa ）, the reactivity of GSS can be ef- fectively aetivated.The autoclaving strength of the concrete made from 20% GSS with Blaine 550 m2/kg, 55% cement and 25% ground sand could reach 89.0 MPa which is not only higher than that of ground granulated blast furnace slag （GGBFS） （ 82.8 MPa, 20% GGBFS, 55% cement and 25% ground sand ）,but also higher than that of traditional PHC concrete （83.9 MPa, 70% cement and 30% ground sand ）.X-Ray Diffraction （XRD） analysis shows that,under autoclave curing condition, the reactivity of GSS can be activated.It＇s feasible to produce PHC concrete by GSS with high fineness and optimized dosage.
出处
《混凝土》
CAS
CSCD
北大核心
2009年第3期90-92,100,共4页
Concrete
关键词
钢渣
压蒸
活性
激发
高强混凝土管桩
ground steel slag
autoclave curing
reactivity
activate
high strength concrete pile
