Investigating the mechanical and fatigue properties of sustainable cement emulsified asphalt mortar. (10th July 2017)

• Record Type: Journal Article
• Authors: Moghadas Nejad, Fereidoon; Habibi, Mehran; Hosseini, Payam; Jahanbakhsh, Hamid
• Is Part Of: Journal of cleaner production. Volume 156(2017)
• Page Start: 717
• Page End: 728
• Publication Date: 2017-07-10
• Subjects: Cement emulsified asphalt mortar (CEAM) -- Waste materials -- Mechanical properties -- Fatigue performance -- Response surface methodology; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2017.04.105
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: With regard to the construction of high speed railways, the role of cement emulsified asphalt mortar (CEAM) is of crucial importance as a leveling and damping material. In this respect, there are many research studies on exploring the mechanical, durability, fatigue, and rheological characteristics of CEAM. Nonetheless, developing greener types of CEAMs would be of great interest for developing transportation infrastructures with low carbon footprint. Accordingly, the current study aims to evaluate the effects of partial replacement of cement with low pozzolanic activity ground granulated blast furnace slag (GGBFS) and silica fume (SF) on mechanical and fatigue performances of CEAM. In addition, a central composite design (CCD) with response surface methodology (RSM) was applied to the results to develop statistical models. The results obtained reveal that utilizing low pozzolanic activity GGBFS showed no significant effect on uniaxial compressive strength (UCS) and decreased the indirect tensile strength (IDT) slightly. Moreover, both UCS and IDT heightened through the inclusion of SF. As a result, the addition of SF would compensate for reduction in some mechanical properties caused by GGBFS with low pozzolanicity. Furthermore, based on the results, semi-circular bending (SCB) test properly differentiated the effects of cement replacement with GGBFS and SF on fatigue resistance of CEAM. Highlights: In this study, sustainable Cement Emulsified Asphalt Mortar (CEAM) was developed. Replacing cement with Silica Fume (SF) increased Uniaxial Compressive Strength (UCS). Utilizing Ground Granulated Blast Furnace Slag (GGBFS) had no effect on the UCS. IDT decreased slightly with the addition of GGBFS and increased by utilization of SF. By increasing the amount of SF in CEAM, Jc first grew and then dropped.