摘要
为实现钢渣与电石渣的协同资源化利用,本文以钢渣和电石渣为原料构建复合材料体系,系统研究其力学性能及在碳化过程中的水化与矿物相演化机制。通过调控钢渣掺量与碳化时间,分析复合材料体系的抗压强度与CO_(2)吸收效率,并结合XRD对不同配合比试样的矿物组成进行表征。结果表明:当钢渣掺量为50%时,复合材料体系的抗压强度最高,为56.5 MPa;在4 h的碳化周期内,其碳化反应速率呈先快后慢的趋势,碳化效率最高达2.25%;XRD分析显示,当钢渣掺量为50%时,碳酸钙与钙长石的衍射峰强度增强,揭示了活性CaO参与碳化反应与钢渣骨架作用之间的协同机制。碳酸钙的大量生成与钢渣微集料效应的共同作用,是提升复合材料体系致密性与强度的关键。本研究为钢渣与电石渣的高效固碳及建材资源化利用提供了理论参考。
To achieve the synergistic resource utilization of steel slag and calcium carbide slag,this study constructs a composite material system using steel slag and calcium carbide slag as raw materials.It systematically investigates the mechanical properties,as well as the hydration and mineral phase evolution mechanisms under carbonation conditions.By adjusting the steel slag content and carbonation duration,the compressive strength and CO_(2)absorption efficiency of the composite system are analyzed.The mineral composition of specimens with different mix proportions is characterized using XRD.The results indicate that when the steel slag content is 50%,the composite system achieves the highest compressive strength,reaching 56.5 MPa.Within a 4 hours carbonation cycle,the carbonation reaction rate shows a trend of being initially fast and then slowing down,with the highest carbonation efficiency reaching 2.25%.XRD analysis reveals that when the steel slag content reaches 50%,the diffraction peak intensities of calcium carbonate and anorthite are enhanced,uncovering a synergistic mechanism between the participation of active CaO in the carbonation reaction and the skeletal role of steel slag.The combined effect of the substantial generation of calcium carbonate and the micro-aggregate effect of steel slag is key to enhancing the density and strength of the composite system.This research provides a theoretical reference for the efficient carbon sequestration and utilization of steel slag and calcium carbide slag as building materials.
出处
《混凝土世界》
2026年第2期24-27,共4页
China Concrete
关键词
钢渣
电石渣
抗压强度
碳化效率
Steel slag
calcium carbide slag
compressive strength
carbonation efficiency
