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引用次数: 0
摘要
这项研究探讨了在水泥基砂浆中结合使用废玻璃集料(GA)和玻璃粉(GP)的问题。为此,在使用氢氟酸进行表面粗化之后,首先研究了天然集料(NA)替代品中 GA 的优化掺入。利用抗压强度结果来选择含有 GA 的最佳混合物。然后,在基于 GA 的优化砂浆中通过水泥替代物添加不同的 GP 含量。同时还浇注了不含 GA 和 GP 用量的对照砂浆作为对比参考。通过考虑抗压和抗折强度、超音速脉冲、碱-硅反应(ASR)、快速氯化物渗透性测试(RCPT)、硫酸镁侵蚀和耐硫酸性,对添加了 GA 和 GP 的混合物进行了详细的机械、物理和耐久性能评估。扫描电子显微镜(SEM)和能量色散 X 射线光谱(EDS)对不同优化(GA + GP)组合的微观结构进行了表征,以分析玻璃材料与周围基体之间的界面过渡区(ITZ)。结果表明,75% GA 和 25% GP 的优化组合具有较高的韧性和耐久性,这是由于 GA/基质 ITZ 增加以及 C-S-H 与 C-(N,K)-S-H产物的形成。
Optimization and Characterization of Cementitious Composites Combining Maximum Amounts of Waste Glass Powder and Treated Glass Aggregates
This work investigates the combined use of waste glass aggregates (GA) and glass powder (GP) in cementitious mortars. For this reason, the optimized incorporation of GA by natural aggregates (NA) replacements was first studied after applying a surface roughening method with hydrofluoric acid. The compressive strength results were utilized to select the best mixture with GA. Then, different GP contents were added by cements substitutions to the optimized GA-based mortar. A control mortar without GA and GP amounts was also casted as a reference for comparison. The detailed mechanical, physical and durability properties of the resulted mixtures with combined GA and GP were assessed by considering the compressive and flexural strengths, ultra-sonic pulse velocity, alkali-silica reaction (ASR), rapid chloride permeability test (RCPT), magnesium sulphate attack and sulfuric acid resistance. The microstructure of different optimized (GA + GP)-combinations was characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS)in order to analyse the interfacial transition zone (ITZ) between glass materials and the surrounding matrix. The results showed that the optimized composition with 75% GA and 25% GP was shown with high compacity and durability characteristics due to the increased GA/matrix ITZ and the formation of C–(N,K)–S–H products with C–S–H.
期刊介绍:
The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on
Properties and performance of concrete and concrete structures
Advanced and improved experimental techniques
Latest modelling methods
Possible improvement and enhancement of concrete properties
Structural and microstructural characterization
Concrete applications
Fiber reinforced concrete technology
Concrete waste management.