Print Email Facebook Twitter Effect of ultra-fine fly ash on the mechanical and shrinkage properties of ultra-high performance concrete Part of: 4th International Rilem Conference on Microstructure Related Durability of Cementitious Composites· list the conference papers Title Effect of ultra-fine fly ash on the mechanical and shrinkage properties of ultra-high performance concrete Author Feng, Taotao (Southeast University, China) Jiang, Jinyang (Southeast University, China) Chu, Hongyan (Nanjing Forestry University, China) Wang, Liguo (Southeast University, China) Date 2021-04-29 Abstract This paper reports on a study to determine the possibility of using ultra-fine fly ash (UFA) for partial or total replacement of normal fly ash (NFA) in ultra-high performance concrete (UHPC). Workability, microstructure, porosity, drying shrinkage as well as mechanical properties were comprehensively studied to investigate the influence of UFA on UHPC. The fly ash, which was a compound of NFA and UFA with various mass fractions, had a total content of 30 wt%. The results demonstrated that compressive strength is enhanced if NFA is partially or totally replaced with UFA. Compared to the reference mixture containing 100 wt% NFA, incorporating UFA into UHPC has been shown to improve its workability. Contrarily, adverse effects on drying shrinkage were discovered when NFA is substituted with UFA. Subject drying shrinkageUltra-fine fly ashultra-high performance concretecompressive strength To reference this document use: http://resolver.tudelft.nl/uuid:eee716ea-f4f6-4a70-b867-c91a3904612d Part of collection Conference proceedings Document type conference paper Rights (c) 2021 the authors Files PDF Effect of ultra-fine fly ... ncrete.pdf 1.1 MB Close viewer /islandora/object/uuid:eee716ea-f4f6-4a70-b867-c91a3904612d/datastream/OBJ/view