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Ping Chen
Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials, Guilin 541004, China

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Journal article
Published: 08 June 2021 in Sustainability
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In this paper, a new method of basic oxygen furnace (BOF) slag component modification with a regulator was studied. The main mineral was designed as C4AF, C2S and C3S in modified BOF slag, and the batching method, mineral compositions, hydration rate, activation index and capability of resisting sulfate corrode also were studied. XRD, BEI and EDS were used to characterize the mineral formation, and SEM was used to study the morphology of hydration products. The results show that most inert phase in BOF slag can be converted into active minerals of C4AF and C2S through reasonable batching calculation and the amount of regulating agent. The formation of C4AF and C2S in modified BOF slag is better, and a small amount of MgO is embedded in the white intermediate phase, but C3S is not detected. With the increase in the CaO/SiO2 ratio in raw materials, the CaO/SiO2 ratio of calcium silicate minerals in modified BOF slag increases, the contents of f-CaO are less than 1.0%, and the activity index improves. Compared with the BOF slag, the activity index and exothermic rate of modified BOF slag improved obviously, and the activity index of 90 days is close to 100%. With the increase in modified BOF slag B cement, the flexural strength decrease; however, the capability of resisting sulfate corrode is improved due to the constant formation of a short rod-like shape ettringite in Na2SO4 solution and the improvement of the structure densification of the hydration products.

ACS Style

Yanrong Zhao; Pengliang Sun; Ping Chen; Xiaomin Guan; Yuanhao Wang; Rongjin Liu; Jincan Wei. Component Modification of Basic Oxygen Furnace Slag with C4AF as Target Mineral and Application. Sustainability 2021, 13, 6536 .

AMA Style

Yanrong Zhao, Pengliang Sun, Ping Chen, Xiaomin Guan, Yuanhao Wang, Rongjin Liu, Jincan Wei. Component Modification of Basic Oxygen Furnace Slag with C4AF as Target Mineral and Application. Sustainability. 2021; 13 (12):6536.

Chicago/Turabian Style

Yanrong Zhao; Pengliang Sun; Ping Chen; Xiaomin Guan; Yuanhao Wang; Rongjin Liu; Jincan Wei. 2021. "Component Modification of Basic Oxygen Furnace Slag with C4AF as Target Mineral and Application." Sustainability 13, no. 12: 6536.