Partial Replacement of Conventional Material with Stabilized Soil in Flexible Pavement Design

Abstract

Due to rapid urbanization and industrialization, the construction of roads increases rapidly for easy and fast transportation. Adequate land is not available everywhere to construct good roads; hence, roads are forcefully built on locally available soil such as loose soil or expansive soil. In this paper, an experimental investigation was carried out on low plastic soil (LPS) to enhance engineering properties by using chemical soil stabilization (fly ash-based geopolymer). The design of flexible pavement thickness was carried out for conventional and stabilized soil material using IITPAVE software as per IRC 37 guidelines. The results show the feasibility of fly ash-based geopolymer significant enhancement of strength were observed in terms of unconfined compressive strength (UCS) for various curing days (0 to 128 days), California bearing ratio (CBR), and Resilient modulus (MR). The microstructural analysis via Scanning Electronic Microscope (SEM) and X-Ray Diffraction Analysis (XRD) was also reveling the formation of geopolymeric gel which leads to the dense matrix to soil mass. The flexible pavement thickness significantly reduces with the application of stabilized low plastic soil.

Potential Use of Fly Ash for Developing Angular-shaped Aggregate

“…A modified proctor test was conducted and OMC & MDD values of fly ash and fly ash-binder mixes were found. OMC & MDD values of F1, F2 and F3 fly ashes were 18.9%, 1.34 g/ cm 3 ; 19%, 1.35 g/ cm 3 and 25.6%, 1.38 g/cm 3 . OMC in the range of 18.5% to 19.0%, 18.0%-19.0% and 25.4%-25.5%, while MDD in the range of 1.38 g/ cm 3 -1.41 g/ cm 3 , 1.40 g/ cm 3 -1.42 g/ cm 3 and 1.37 g/ cm 3 -1.38 g/ cm 3 were found for F1, F2 and F3 fly ash-binder mixes, respectively.…”

“…More aggregate is required for the fast infrastructure development of a country. Mining of natural aggregate leads to severe environmental impacts and consumption of natural resources [3].…”

Application of Class C Fly Ash and Quarry Dust Mix for Utilization as Subbase Material in Flexible Pavement

“…Figure 2 shows variation of UCS value for various fly ash quarry dust mixes obtained after curing for 3, 7 and 28 days. The strength gain within the mixes containing fly ash is attributed to the presence of silica and alumina [30]. It was observed that as the percentage of quarry dust Variation of unconfined compressive strength with varying quarry dust addition to fly ash addition to fly ash increased, the strength of the mix decreased.…”

Unconfined Compressive Strength Characteristics of Treated Peat Soil with Cement and Basalt Fibre

“…Previous researchers investigate on any possible techniques or practices to enhance strength properties of peat soils. Various soil improvement techniques such as utilize *Corresponding Author Institutional Email: bayat.m@pci.iaun.ac.ir (M. Bayat) mechanical energy and/or man-made materials have been used to improve the mechanical characteristics of weak or soft soils in practice for many years [4][5][6]. The problems of structures situated on weak or soft deposits are represented by significant settlement, low shear and compressive strength parameters [7][8][9][10][11].…”