ABSTRACT

This paper represents the results of a comprehensive experimental work on developing high performance concrete mixes containing different percentages of electric arc furnace steel slag (EAFSS) coarse aggregate (0, 25, 50, 75, and 100% by weight) for sustainable pavements. The use of steel slag powder (SSP) and silica fume (SF) as a mineral filler was also investigated. Mechanical properties of concrete such as compressive, splitting tensile and flexural strengths, modulus of elasticity, permeability, and thermal conductivity, were measured in the laboratory. The morphological and microstructural properties of the investigated steel slag were also determined. Finally, the field performance of the investigated concrete mixes was predicted using the AASHTOWare Pavement ME for a typical Jointed Plain Concrete Pavement (JPCP) system in terms of transverse cracking, faulting, and roughness. The results of this research indicate that, all investigated mechanical properties for steel slag mixes are better than the natural aggregate mix with optimum mechanical properties and performance for the concrete mix with 50% EAFSS. Using the SSP powder with or instead of SF did not show significant improvement in mechanical properties/performance. The results emphasise that EAFSS is a viable sustainable construction material for rigid pavements.

摘要

本文介绍了一项综合实验工作的结果，该工作旨在开发用于可持续路面的含有不同百分比的电弧炉钢渣 (EAFSS) 粗骨料（按重量计 0、25、50、75 和 100%）的高性能混凝土混合物。还研究了使用钢渣粉 (SSP) 和硅灰 (SF) 作为矿物填料。在实验室中测量了混凝土的力学性能，例如抗压强度、劈裂强度和抗弯强度、弹性模量、渗透性和导热性。还确定了所研究钢渣的形态和微观结构特性。最后，在横向开裂、断层和粗糙度方面，使用 AASHTOWare Pavement ME 预测所研究混凝土混合物的现场性能，用于典型的接缝普通混凝土路面 (JPCP) 系统。这项研究的结果表明，所有研究的钢渣混合料的力学性能都优于天然骨料混合料，具有最佳的力学性能和 50% EAFSS 的混凝土混合料的性能。将 SSP 粉末与 SF 一起使用或代替 SF 并未显示出机械性能/性能的显着改善。结果强调，EAFSS 是一种适用于刚性路面的可行的可持续建筑材料。所有研究的钢渣混合料的机械性能都优于天然骨料混合物，具有最佳机械性能和 50% EAFSS 混凝土混合料的性能。将 SSP 粉末与 SF 一起使用或代替 SF 并未显示出机械性能/性能的显着改善。结果强调，EAFSS 是一种适用于刚性路面的可行的可持续建筑材料。所有研究的钢渣混合料的机械性能都优于天然骨料混合物，具有最佳机械性能和 50% EAFSS 混凝土混合料的性能。将 SSP 粉末与 SF 一起使用或代替 SF 并未显示出机械性能/性能的显着改善。结果强调，EAFSS 是一种适用于刚性路面的可行的可持续建筑材料。