Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL, USA.
Waste Manag Res. 2018 Feb;36(2):149-158. doi: 10.1177/0734242X17744040. Epub 2017 Dec 19.
Concrete grinding residue is the waste product resulting from the grinding, cutting, and resurfacing of concrete pavement. Potential beneficial applications for concrete grinding residue include use as a soil amendment and as a construction material, including as an additive to Portland cement concrete. Concrete grinding residue exhibits a high pH, and though not hazardous, it is sufficiently elevated that precautions need to be taken around aquatic ecosystems. Best management practices and state regulations focus on reducing the impact on such aquatic environment. Heavy metals are present in concrete grinding residue, but concentrations are of the same magnitude as typically recycled concrete residuals. The chemical composition of concrete grinding residue makes it a useful product for some soil amendment purposes at appropriate land application rates. The presence of unreacted concrete in concrete grinding residue was examined for potential use as partial replacement of cement in new concrete. Testing of Florida concrete grinding residue revealed no dramatic reactivity or improvement in mortar strength.
混凝土磨屑是在对混凝土路面进行研磨、切割和翻新过程中产生的废物。混凝土磨屑的潜在有益应用包括用作土壤改良剂和建筑材料，包括作为波特兰水泥混凝土的添加剂。混凝土磨屑的 pH 值较高，虽然没有危害，但它的 pH 值足够高，需要在水生生态系统周围采取预防措施。最佳管理实践和州法规的重点是减少对这种水生环境的影响。重金属存在于混凝土磨屑中，但浓度与通常回收的混凝土残余物相同。混凝土磨屑的化学成分使其成为在适当土地施用率下用于某些土壤改良目的的有用产品。研究了混凝土磨屑中未反应的混凝土，以探讨其作为新混凝土中部分替代水泥的可能性。对佛罗里达州混凝土磨屑的测试表明，其在提高砂浆强度方面没有显著的反应性或改善。
