1、SEGEOTECINLECTED GEGeo-PHNICALGEONOVATIGEOMAPAPERS O-CHINAShandoChineInstitute oublished bSPECI-CHVE ANDTERIALFROM THINTERNJuly 2ShanSPONShandong DeparUniversise Nationf the AmeEDWen-chieJason Y. by the AmerAL PUBINASUSTAIS AND GE PROCEATIONA527, 201dong, ChinSORED BYng Univertment of Tty of Oklahal
2、 Sciencerican SocieITED BY h Cheng, Wu, Ph.Dican SocietyLICATIO20NABLE UEOSYSTEDINGS L CONFE6 a sity ransportathoma Foundatioety of CiviPh.D. ., P.E. of Civil EnON NO.16 SE OF EMS OF THE FRENCE ion n l Engineergineers 263 OURTHs Published by American Society of Civil Engineers 1801 Alexander Bell Dr
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8、 by locating a title in ASCEs Civil Engineering Database (http:/cedb.asce.org) or ASCE Library (http:/ascelibrary.org) and using the “Permissions” link. Errata: Errata, if any, can be found at http:/dx.doi.org/10.1061/9780784480069 Copyright 2016 by the American Society of Civil Engineers. All Right
9、s Reserved. ISBN 978-0-7844-8006-9 (PDF) Manufactured in the United States of America. Preface This Geotechnical Special Publication (GSP) contains 13 high quality papers that were peer-reviewed and presented at the GeoChina International Conference on Sustainable Civil Infrastructures: Innovative T
10、echnologies for Severe Weathers and Climate Changes, held in Shangdong, China on July 25-27, 2016. Major topics covered are in-situ test methods for site characterization, design and quality control of earth structures and subgrades, pavement performance evaluation B. Munwar Basha, M.ASCE2; Bhaskar
11、Chittoori, M.ASCE3; and Mosleh Ali Al-Shamrani11Bugshan Research Chair in Expansive Soils, Dept. of Civil Engineering, College of Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia. E-mail: 2Dept. of Civil Engineering, Indian Institute of Technology Hyderabad, Yeddumailaram 502205, India. E-m
12、ail: bashaiith.ac.in 3Dept. of Civil Engineering, Boise State Univ., Boise, ID 83725. E-mail: bhaskarchittooriboisestate.edu Abstract: Expansive soils which create heave and shrinkage related distresses are considered to be extremely problematic globally. When these soils are used alone or in conjun
13、ction with fiber-reinforcement as hydraulic barriers in waste containment systems, their prime purpose is to impede flow. Polypropylene fiber materials are durable and sustain improvement in soil properties in the long run. In order to have intact bonding between the randomly mixed fiber and clay, a
14、n additive in the form of lime is considered. In this study, the combined effect of lime and randomly oriented polypropylene fiber inclusion on the hydraulic conductivity behavior of an expansive soil is evaluated. The dosage of lime was fixed at 6% resorting to soil pH response. The effect of fiber
15、 type (Fibercast and Fibermesh), fiber dosage (0.2, 0.4, and 0.6% by weight of soil) and fiber length (6 mm and 12 mm) on the hydraulic conductivity behavior was studied. Statistical analysis was performed to correlate the hydraulic conductivity of treated expansive soil with dosage and length of ra
16、ndomly oriented polypropylene fibers. Two exponential best fit equations are proposed for estimating the hydraulic conductivity of treated expansive soils in terms of dosage and length of two types of polypropylene fibers. Further, reliability analysis was performed to examine the suitability of tre
17、ated expansive soils for waste containment in Municipal Solid Waste (MSW) landfills. INTRODUCTION Compacted clay liners constitute integral part of landfill lining systems. The fundamental requirement of a compacted clay liner is in impeding flow and accordingly the most significant factor affecting it is hydraulic conductivity (Daniel *HR&KLQD*63 $6&(
