Strength and Drainage Characteristics of Poor Soils Stabilized with Construction Demolition Waste
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ORIGINAL PAPER
Strength and Drainage Characteristics of Poor Soils Stabilized with Construction Demolition Waste Abhishek Sharma
. Ravi Kumar Sharma
Received: 17 November 2019 / Accepted: 27 April 2020 Springer Nature Switzerland AG 2020
Abstract This paper presents a laboratory investigation on the use of construction demolition waste in poor clayey soil to improve its strength and drainage characteristics. Various laboratory tests such as differential free swell, Atterberg’s limits, compaction, unconfined compressive strength (UCS), California bearing ratio (CBR), and permeability have been conducted on un-stabilized and Construction Demolition Waste (CDW) stabilized clayey soil. The outcomes revealed that the addition of CDW in poor soil reduced both maximum dry density and optimum moisture content. The UCS, CBR, and permeability got improved on adding optimum content of CDW in poor clayey soil. The secant modulus also increased on addition of the CDW in virgin soil. The regression analysis performed for different tests showed good agreement of laboratory results with predicted values. Thus, it can be revealed that using CDW in stabilization of poor clayey soil will not only solve the problem of its disposal but will also be cost effective and protect the environment.
A. Sharma (&) R. K. Sharma National Institute of Technology, Hamirpur, Himachal Pradesh, India e-mail: [email protected] R. K. Sharma e-mail: [email protected]
Keywords Soil stabilization Unconfined compressive strength California bearing ratio Permeability Regression analysis
1 Introduction Expansive soils are considered as poor soils due to their very high swelling and shrinkage potential on altering water content. Cracks are often observed on the structures resting over these types of soils which lead to instability of structures and induce large settlements in structures. Due to scarcity of land and rapid development in construction sector, engineers are forced to construct the structures over these soils. The construction of bridges, subways, retaining walls and embankments on poor soil is a very challenging task. These sites require soil stabilization by using different additives to improve the sub-grade and strength characteristics of poor soils. The soil stabilization can be accomplished by using physical and chemical alteration techniques. The physical alteration technique comprises sand cushions (Satyanarayna 1966; Phanikumar and Suri 2009) and the cohesive non-swelling (CNS) layer technique (Katti 1978). The chemical alteration technique comprises mixing of chemicals such as Portland cement, fly ash, lime, CaCl2 and construction demolition waste (Rao 1984; Hunter 1988; Sankar 1989; Petry and Little
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Geotech Geol Eng
2 Material Used 2.1 Soil The soil used in the laboratory study was brought from Alipur village, Haryana, India and was classified as CH confirming to Unified Soil Classification System (USCS) according to ASTM D2487-11.The gradation curve for claye
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