Environmental and economical friendly ultra-high performance-concrete incorporating appropriate quarry-stone powders. (1st July 2020)

• Record Type: Journal Article
• Authors: Yang, Rui; Yu, Rui; Shui, Zhonghe; Gao, Xu; Han, Jinlong; Lin, Gang; Qian, Diao; Liu, Zhijie; He, Yongjia
• Is Part Of: Journal of cleaner production. Volume 260(2020)
• Publication Date: 2020-07-01
• Subjects: Quarry stone powder -- Limestone powder -- Basalt stone powder -- Ultra high performance concrete -- Environmental and economical friendly; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2020.121112
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Quarry stone powder is one of the solid waste, which can create obvious environmental risks. To solve this problems, 22.2%–44.4% of cement is replaced by two types of quarry stone powder (basalt and limestone powders) in producing an environmentally-friendly ultra-high performance concrete (UHPC) in this study. The material mix design is followed on the basis of the modified Andreasen and Andersen (MAA) model. Then, the impact of the quarry stone powders on fresh and hardened properties of UHPC are investigated, including flowability, compressive strength, early hydration kinetics, and durability. The results indicate that the incorporation of quarry stone powder can significantly improve the flowability, slow down the early hydration rate of cement and decrease autogenous shrinkage of UHPC during early age. Besides, the addition of quarry stone powder could decrease the strength of UHPC at 7 days, while its strength is comparable with the reference mix at 56 days. The carbon dioxide (CO2 ) emissions calculation shows that application of quarry limestone powder can significantly reduce the environmental burden of UHPC, which means the produced UHPC can be treated as a green building material with advanced properties in the near future. Highlights: Quarry stone powders can be used to produce eco-friendly UHPC. The flowability of UHPC was improved by including stone powder. Autogenous shrinkage of UHPC can be reduced by adding quarry stone powder. The produced UHPC with quarry stone powders has good durability. The microstructure of the produced UHPC with quarry stone powders is dense.