Mechanical Properties of Alkali-activated Slag Concrete
WAN Xiaomei1,2, ZHANG Yu1, ZHAO Tiejun1,2, ZHANG Shuwen1, CHENG Yangjie1
1 School of Civil Engineering, Qingdao University of Technology, Qingdao 266033; 2 Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao 266033
Abstract: This paper presents a series of investigation results on compressive strength, splitting strength, flexural strength, elastic modulus, Poisson’s ratio and stress-strain evolution of alkali-activated slag concrete (AASC). Based on the comparison with ordinary Portland cement concrete (OPCC), this paper proposed three models which involves the relationship between splitting strength and compressive strength, the relationship between flexural strength and compressive strength, and the relationship between elastic modulus and compressive strength. The results demonstrate that AASC is shown to be similar in splitting strength with OPCC with same compressive strength level, while to be higher in flexural strength than OPCC. And the relationship between elastic modulus and compressive strength of AASC activated by NaOH is highly close to OPCC, while the elastic modulus of AASC activated by water glass is lower than OPCC. Furthermore, it can be found that, the results of Poisson’s ratio keep stable even at the stress level of 0.6,and the critical stress level is nearly 0.8 at which Poisson’s ratio booms.
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2018, Vol. 32 
