Characteristic Evaluation of Geopolymer Concrete for the Development of Road Network: Sustainable Infrastructure
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TECHNICAL PAPER
Characteristic Evaluation of Geopolymer Concrete for the Development of Road Network: Sustainable Infrastructure Ramamohana Reddy Bellum1 · Karthikeyan Muniraj1 · Sri Rama Chand Madduru2 Received: 7 May 2020 / Accepted: 17 July 2020 © Springer Nature Switzerland AG 2020
Abstract A large quantity of the rural roads in the world has been connected with all traditional concrete roads and has a low volume of traffic. The common problem for such kinds of roads is sustainability and durability. Geopolymer concrete (GC) roads offer an alternate to the traditional cement-based concrete roads. An acceleratory pavement track (APT) with six segments has been constructed to evaluate the practical approaches of fly ash-ground granulated blast furnace slag (GGBFS)-based GC in the sustainable development of rural road network. This paper presents the non-destructive testing (NDT) on APT to check the quality of GC. Moreover, the mechanical, microstructural, and durability characteristics have been analyzed on samples prepared at the time of APT construction. In this paper, efforts have been made to elaborate on the corrosion resistance and chloride resistance of GC after 28 days of ambient curing. The highest compressive strength of 56.63 MPa was obtained for mix with 70% FA, 30% GGBFS, and 0.4 S/B ratio sample after 28 days of ambient curing, and this value is strengthened by rebound hammer result, i.e., 55.7 MPa, conducted on APT without load revolution. The increase in the number of load repetitions on APT found a decrease in rebound and ultrasonic pulse velocity values. Geopolymer concrete mix with 30% GGBFS attained superior NDT behavior upon load repetitions on APT, and similar improved characteristics were identified on laboratory-based testing. Keywords Geopolymer concrete · Acceleratory pavement track · Non-destructive testing · Mechanical properties · Microstructure · Sustainability
Introduction The major contributor to atmospheric carbon dioxide (CO2) liberations is the production of ordinary Portland cement (OPC) [1, 2]. Extensive usage of cement for the construction of rigid pavements along with some other construction fields would lead to an increase in global warming and thus ascend for sustainable issues. Further, the embodied energy related to concrete is modest; it can be reduced through the use of supplementary cementing materials (SCMs). The construction industry is mandated to use industrial by-products as a cementitious component in concrete. On the other side, * Ramamohana Reddy Bellum [email protected] 1
Department of Civil Engineering, Vignan’s Foundation for Science, Technology and Research, Vadlamudi, Guntur 522213, India
Department of Civil Engineering, Sree Chaitanya College of Engineering, Karimnagar, Telangana, India
2
geopolymer concrete (GC) has emerged as an alternative to cement concrete, which could potentially reduce emissions of CO2 and utilize high volumes of industrial by-products such as fly ash (FA) and ground granulated blast furnace slag (GGBFS)
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