www.ijsetr.com ISSN 2319-8885 Vol.05,Issue.50 December-2016, Pages:10328-10334 Copyright @ 2016 IJSETR. All rights reserved. Study on Use of Bitumen Emulsion on Gravel Road Soil MASSOUD ABDELSALAM MOHAMMED BENBINI 1 , PROF. R. K. PANDEY 2 , ER. Y.K. KUSHWAHA 3 Dept of Civil Engineering, Shepherd School of Engineering and Technology, Sam Higginbottom Institute of Agriculture Technology & Sciences (Deemed-to-be-University) Allahabad, UP, India. Abstract: Long term performance of pavement structures is altogether affected by the strength and durability of the sub grade soils. Design of the various pavement layers are very much dependent on the strength of the sub grade soil over which they are going to be laid. Weaker sub grade demands thicker layers whereas stronger sub grade goes well along with thinner pavement layers. In-situ sub-grades frequently don't provide the support required to achieve acceptable performance under the traffic loading with increasing environmental demands. Sub-grade‟s performance generally depends on three of the basic characteristics, which are: Load bearing capacity, Moisture content and Shrinkage and/or swelling. The main objective of this experimental study is to improve the properties of the gravely soil by adding bitumen emulsion as stabilizing agent and little bit cement as filler. In this project locally available red colored late rite type gravel soil is taken as experimenting material. Medium setting emulsion (MS) is used as stabilizing agent in this particular study. Bitumen sand stabilization is an effective process as bitumen makes soil stronger and improves resistance capacity against water and frost. Keywords: CBR, MS, Indirect Tensile Strength (ITS), Unconfined Compressive Strength (UCS). I. INTRODUCTION A. Sub Grade Soil Soil is a standout amongst the most abundant construction materials of nature. Just about all kind of construction is based with or upon the soil. Any land-based structure depends upon its foundation characteristics. For that reason, soil is a very critical element influencing the success of a construction project. Soil is the earliest part of the foundation or one of the raw materials used in the whole construction process. Long term performance of pavement structures is altogether affected by the strength and durability of the subgrade soils. Whether the pavement is flexible or rigid, it rests on a soil foundation on an embankment or cutting, normally that is known as subgrade. It may be defined as a compacted layer of generally occurring local soil just beneath the pavement crust, providing a suitable foundation for the pavement. The soil in subgrade is normally stressed to certain minimum level of stresses due to the traffic loads. The design of the pavement layers to be laid over subgrade soil starts off with the estimation of subgrade strength and the volume of traffic to be carried. Design of the various pavement layers are very much dependent on the strength of the subgrade soil over which they are going to be laid. Weaker subgrade demands thicker layers whereas stronger subgrade goes well along with thinner pavement layers. In- situ sub-grades frequently don't provide the support required to achieve acceptable performance under the traffic loading with increasing environmental demands. Sub-grade‟s performance generally depends on three of the basic characteristics, which are: Load bearing capacity, Moisture content and Shrinkage and/or swelling. B. Soil Stabilization Stabilization is the process of blending and mixing materials with a soil to improve the soil‟s strength and durability. The process may include blending soils to achieve a desired gradation or mixing commercially available that may alter the gradation, change the strength and durability, or act as a binder to cement the soil. The effectiveness of stabilization depends on the ability to obtain uniformity in blending the various materials. Mixing in a stationary or traveling plant is preferred. However, other means of mixing (such as scarifiers, plows, disks, graders, and rotary mixers) have been satisfactory. The soil-stabilization method is determined by the amount of stabilizing required and the conditions encountered on the project. An accurate soil description and classification are essential for selecting the correct materials and procedure. C. Uses of Soil Stabilization Improve Quality: Stabilization is commonly used for better soil gradation, reduction of the PI or swelling potential, and increased durability and strength. Soils stabilized by additives often provide an all-weather working platform for construction operations. These types of soil-quality improvements are referred to as soil modifications. Reduce Thickness: A soil layer‟s tensile strength and stiffness can be improved by using additives and can thereby reduce the thickness of the stabilized layer and overlying layers within the pavement system. As the quality of a soil layer is increased, the ability of that layer to distribute the load over a greater area is generally increased enough to
Study on Use of Bitumen Emulsion on Gravel Road Soil
May 05, 2023
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