Department of Civil, Architectural, and Environmental Engineering, University of Miami, 1251 Memorial Drive Room MEB 325, Coral Gables, FL 33146, USA.
Waste Manag. 2013 Jul;33(7):1659-66. doi: 10.1016/j.wasman.2013.03.018. Epub 2013 Apr 28.
Cathode ray tube (CRT) glass is considered a hazardous material due to its lead toxicity. In addition, current disposal practices are being phased out due to their adverse environmental impacts. In this project, CRT glass was used as a fine aggregate replacement in concrete. Life-cycle material characterization was conducted by evaluating the durability and strength of the CRT-Concrete. Leaching tests were also conducted to investigate whether the material meets drinking water limits for Pb. Test results show that the plastic state of the CRT-Concrete was affected by the angularity of the glass particles. Moreover, the compressive strength of CRT-Concrete met and exceeded that of the control specimen. However, CRT-Concrete was susceptible to expansive alkali-silica reactions when more than 10% CRT replacement was used. Environmental leaching results show that lead concentrations from CRT-Concrete are below the drinking water limits depending on the CRT volume replacement and if biopolymers are used.
阴极射线管（CRT）玻璃由于其铅毒性而被认为是危险材料。此外，由于其对环境的不利影响，目前的处置方法正在逐步淘汰。在这个项目中，CRT 玻璃被用作混凝土的细集料替代品。通过评估 CRT 混凝土的耐久性和强度，对其进行了生命周期材料特性描述。还进行了浸出试验，以研究该材料是否符合 Pb 的饮用水限值。试验结果表明，CRT 混凝土的塑性状态受到玻璃颗粒的角状的影响。此外，CRT 混凝土的抗压强度达到并超过了对照试件的强度。然而，当使用超过 10%的 CRT 替代物时，CRT 混凝土容易发生膨胀性碱-硅反应。环境浸出结果表明，取决于 CRT 体积替代率和是否使用生物聚合物，从 CRT 混凝土中浸出的铅浓度低于饮用水限值。
