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| Effect of Air-cooled Blast Furnace Slag as Fine Aggregate on the Properties of Cement Mortar |
| WANG Aiguo1, SHI Yan2, LIU Kaiwei1, SUN Daosheng1, LU Bangcheng1, LIU Peng1
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1 Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei 230022;
2 Research Center of Water Engineering Safety and Disaster Prevention of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010 |
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Abstract Compositions, structures and properties of air-cooled blast furnace slag and air-cooled blast furnace slag sand (ABFSS) were tested, workability and mechanical properties of mortars prepared with ABFSS and natural river sand (NRS) were contrastively investigated, mechanism of ABFSS improving the mechanical properties of mortar was analyzed from interface structure and pore structure. The results show that ABFSS is composed of many aggregate particles with rough surface and a number of powder particles, particles with rough surface texture improve interfacial structure between aggregate particles and matrix. Powder particles in the ABFSS reduce void of aggregate, improve cohesiveness and fluidity of fresh mortar and increase compactness of hardened mortar. ABFSS can be used to produce a mortar with better mechanical properties than corresponding mortar made with NRS, but it reduces the workability of mortar.
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Published: 25 June 2017
Online: 2018-05-08
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2017, Vol. 31 
