Global journal 42

Page 1

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GJESR RESEARCH PAPER VOL. 1 [ISSUE 10] NOVEMBER, 2014

ISSN:- 2349–283X

GEO-FIBER REINFORCED FLYASH FOR GROUND IMPROVEMENT 1Ravi

Mishra Post Graduate Student Department of Civil Engineering, Madan Mohan Malviya University of Technology, Gorakhpur, India Email: ravi12mishra@gmail.com

2Dr.S.M

Ali Jawaid Associate Professor Department of Civil Engineering, Madan Mohan Malviya University of Technology, Gorakhpur, India Email: smaj@rediffmail.com

ABSTRACT: This paper illustrates the possibility of utilization of the fly ash generated from the coal/lignite based thermal power plants through ground improvement technique, leading to an effective waste management. In this study samples were prepared by mixing different percentage of fly ash with different percentage of soil, with an aim to compare strength gain with geo-fiber. Fly-ash mixed with highly compressible soil and reinforced with geo-fiber may find potential applications in road and embankment constructions with due regards for its strength characteristics, durability, longevity and environmental safety. KEYWORDS: Generation; Utilization; Environmental safety 1. INTRODUCTION Fly ash closely resembles volcanic ashes used in production of the earliest known hydraulic cements about 2,300 years ago. Those cements were made near the small Italian town of Pozzuoli – which later gave its name to the term pozzolan. A pozzolan is a siliceous/aluminous material that, when mixed with lime and water, forms a cementations compound. The difference between fly ash and portland cement becomes apparent under a microscope. Fly ash particles are almost totally spherical in shape, allowing them to flow and blend freely in mixtures. That capability is one of the properties making fly ash a desirable admixture for concrete. The aim of the work is to stabilize the fly ash obtained from thermal power plant by mixing it with soil and geo-fiber, which can subsequently be utilized for various geotechnical and highway engineering applications such as filling of embankments, construction of highways, replacement of poor subgrade soil etc.

the benchmark for determining the quality of compaction. The dry density of fill is of primary importance, as it is the major parameter of strength and compressibility of the fills. 2. Materials i.

Soil

ii.

Fly Ash

iii.

Geofiber

2.1 Soil The soil sample which was collected from Ravindra Nagar (Dhoos) Kushinagar. The engineering properties, proctor’s compaction test and grain size distribution curve of the soil is given in Table 1 and, Fig 1, Fig 2 respectively.

The performance of stabilized mixes depends upon the compaction or densification of the fill, proper compaction is therefore, critical to the performance of fly ash, fly ash-soil and fly ashsoil-geo-fiber fills. The maximum dry density (MDD) and optimum moisture content (OMC) obtained by Proctor compaction test becomes

© Virtu and Foi.

Table 1 Engineering Properties of Soil

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