Determination of Los Angeles Abrasion Value and California Bearing Ratio Value using Aggregate Crushing Value of Base Course from Different Aggregate Sources in Madhesh Province
Student: Ram Kumar Malepati
Supervisor: Er. Gopal Gautam
Submitted Date:
September, 2024
Abstract
The physical properties of materials used in the base course of pavement play a critical role
in determining the quality of road construction. Aggregates from different river sources
exhibit varying physical, chemical, and geotechnical properties. In Madhesh Province,
different aggregates sources are used for road construction, so determining the values of the
physical properties of aggregates for the base course and conducting suitability research is
essential for road construction projects.
The primary objective of this research is to assess the physical properties of base course
aggregates available in Madhesh province and to evaluate their suitability according to the
"SSRBW 2016 (2nd Amendments 2022)" published by the DoR, with a focus on strength
and durability. Additionally, the study aims to analyze the relationship between the Los
Angeles abrasion value and the California bearing ratio value with the aggregate crushing
value test, based on laboratory test results.
Base course aggregate samples from within Madhesh Province were collected for this
research. According to the IS code and the manual of standard tests by the DoR, laboratory
tests were conducted on sixty six samples of twenty two location of twenty two river to
determine various physical properties, including gradation analysis, water absorption &
specific gravity, combine EI and FI, ACV, LAAV, AIV and CBR value. Out of twenty two
river sources, twenty one sources samples met the specified requirements. Seventy five
percentage suitable samples were selected for regression analysis to evaluate and establish
the relationship between the CBR value and LAAV with ACV. The remaining twenty five
percentage suitable samples were used for model validation and the results show strong
relationship between LAAV and CBR value with the ACV with R
2
values 0.841 and 0.8444
respectively. Therefore, the relationship between LAAV and CBR value with ACV could be
validated if the ACV test is used as a substitute for the LAAV and CBR value tests.
Keywords
Aggregate crushing value, base course, California bearing ratio value test, Los
Angeles abrasion value Test.