A PRELIMINARY STUDY ON DEVELOPMENT OF ULTRA-HIGH STRENGTH GEOPOLYMER MORTARS
Ultra-high performance concrete has been used widely in many fields.The advent of geopolymers has opened up an opportunity for replacing Portland cement, which is eco-unfriendly during the production process and provides with a more compact and denser matrix that makes the strength of materials stronger.In this study, based on study effects of slag/fly ash ratio and silica fume content on flowability, setting time, compressive strength and microstructural characterization, the possibility and feasibility of using industrial by-product to manufacture high performance concrete is explored.The results indicate that the slag/fly ash ratio and silica fume have a significant influence on flowability, setting time and compressive strength.The mini slump flow was increased with the increase of slag/fly ash ratio while decreased with the addition of silica fume.The setting time was increased with the increase of slag/fly ash ratio and the addition of silica fume.The compressive strength is dependent on the slag/fly ash ratio and the addition of silica fume.FTIR results find that the main bands of C-A-S-H and N-A-S-H are observed with the variation of slag/fly ash ratio and silica fume does not react completely.
Geopolymer mortars Slag/fly ash ratio Silica fume Ccompressive strengths Flowability
Yiwei Liu Caijun Shi Zuhua Zhang Ning Li Long Lei
Key Laboratory for Green & Advance Civil Engineering Materials and Application Technology of Hunan P Key Laboratory for Green & Advance Civil Engineering Materials and Application Technology of Hunan P
国际会议
福州
英文
253-262
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）