EFFECT OF LOCUST BEAN WASTE ASH ON LIME MODIFIED BLACK COTTON SOIL.
EFFECT OF LOCUST BEAN WASTE ASH ON LIME MODIFIED BLACK COTTON SOIL.
No Thumbnail Available
Date
2011-11
Authors
OVUARUME, UFOMA BERNARD.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Black cotton soil classified as an A-7-6(24) soil on the AASHTO classification
collected from New Marte area of Borno State was modified with up to 4% lime and
locust bean waste ash (LBWA) up to 8% by weight of dry soil. The effect of LBWA
on the lime modified soil was studied with respect to particle size distribution,
Atterberg limits, compaction characteristics and shear strength parameters using three
(3) compactive efforts of British Standard light (BSL), West African Standard (WAS),
and British Standard heavy (BSH). Statistical analysis was carried out on results
obtained from the tests conducted to determine significant difference (i.e ,p<0.05) on
the various soil-lime-LBWA mixtures using a two way Analysis of
Variance(ANOVA) with the Microsoft Excel Analysis Tool Pak Software Package.
Analysis of the results of the soil-lime mixtures considered showed increase in
percentage of fine fraction, improvement in the plasticity index, decrease in maximum
dry density (MDD), with increase in optimum moisture content (OMC), as well as a
decrease in cohesion with increasing angle of internal friction all with higher locust
bean waste ash contents. The results also showed that the modified soil met the
requirements of the Nigerian General Specifications of not more than 35% passing
sieve No.200, maximum plasticity (PI) index of 12%, and liquid limits (LL) of a
maximum of 50% when used as a subgrade material in road construction. An optimal
blend of 4% lime 8%LBWA is recommended for the modification of black cotton soil
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL AHMADU
BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILMENT FOR THE
AWARD OF THE DEGREE OF MASTER OF SCIENCE IN CIVIL
ENGINEERING
DEPARTMENT OF CIVIL ENGINEERING
FACULTY OF ENGINEERING
AHMADU BELLO UNIVERSITY, ZARIA
KADUNA STATE, NIGERIA.
NOVEMBER, 2011
Keywords
EFFECT,, LOCUST,, BEAN,, WASTE ASH,, LIME,, MODIFIED,, BLACK COTTON SOIL.