废弃阴极射线管玻璃对混凝土屏蔽性能的影响

Influence of Waste Cathode Ray Tube(CRT) Glass on Shielding Performance of Concrete

用占细骨料总量0、20%、40%、60%的废弃阴极射线管(CRT)玻璃分别和100%、80%、60%、40%的普通河砂、磁铁矿砂配制出两种不同细骨料混凝土试件,进行了坍落度、抗压强度、γ射线屏蔽性能的测试。结果表明,随着细骨料中CRT废玻璃比例的提高,新拌混凝土坍落度随之变大,28d立方体试块抗压强度有所降低,混凝土对γ射线的屏蔽效果逐渐增强;当CRT在普通河砂混凝土中掺量达到60%时,配制出的混凝土屏蔽能力接近100%磁铁矿砂混凝土,说明CRT玻璃可以作为一种新型防辐射材料,为防辐射混凝土的研究提供一定参考。

Using waste cathode ray tube（CRT） glass which is accounting for 0, 20%, 40%, 60% of total fine aggregates, respectively, with 100%, 80%, 60%, 40% of the ordinary river sand, magnetic iron ore, two different fine aggregate concrete specimens are prepared. For above concrete, the specimens slump, compressive strength, γ-ray shielding performance tests are carried out. The results show that with fine aggregate in a higher proportion of CRT, fresh concrete slump becomes larger, 28 d compressive strength becomes smaller, shielding performance of concrete increases. When the CRT content reaches 60% of ordinary river sand concrete, the concrete shielding capacity is closed to 100% magnetic iron ore concrete, which indicate that CRT can be described as a new radiation shielding material for the study of radiation concrete.