Properties of Cementitious Composites Containing Active/Inter Mineral Admixtures
Pingchuan Wu1, Changlong Wang2,1,3, Yapeng Zhang1, Lie Chen1, Wei Qian1, Zhenyu Liu1, ChangZhi Jin1, Li Li1
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1School of Civil Engineering, Hebei University of Engineering, Handan Hebei Province, 056038, China
2Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology,
Ganzhou Jiangxi Province 341000, China
3Tianjin Sunenergy Sega Environmental Science and Technology Co. Ltd, Tianjin 300000, China
Submission date: 2017-04-25
Final revision date: 2017-08-05
Acceptance date: 2017-08-19
Online publication date: 2018-02-06
Publication date: 2018-03-12
Pol. J. Environ. Stud. 2018;27(3):1323–1330
Fly ash and ground iron ore tailings with fineness similar to cement were used as active and inert mineral admixtures in this study. This paper examines the compressive strength development of plain mortar and blend mortar containing fly ash and ground iron ore tailing. The mortar was cured at the same curing regime and a different water to cementitious material ratio was used. The autogenous shrinkage is also detected in the first seven days. At the early stage of hydration, fly ash and ground iron ore tailings played a role as physical filler during the hydration of the cementitious composites. As age increases, the pozzolanic reaction of fly ash became dramatic. Concrete with fly ash and ground iron ore tailings has a similar trend of autogenous shrinkage. As the amount of fly ash and ground iron ore tailings increases, autogenous shrinkage linearly decreases and their autogenous shrinkage is similar to each other. The autogenous shrinkage of concrete in one day is more than the total shrinkage of 80% in seven days.