Properties of Ironstone Lateritic Gravels in Relation to Gravel Road Pavement Construction |
| |
| Authors: | C M O Nwaiwu I B K Alkali U A Ahmed |
| |
| Institution: | (1) Department of Civil and Water Resources Engineering, University of Maiduguri, Maiduguri, 600004, Borno State, Nigeria;(2) Borno State Agricultural Development Programme, P.M.B. 1452 Maiduguri, Borno State, Nigeria;(3) Ministry of Works and Housing, Damaturu, Yobe State, Nigeria |
| |
| Abstract: | A laboratory investigation was conducted to determine properties of five samples of ‘oolitic ironstone’ lateritic gravel aggregates
which are relevant to their use as road construction materials. Measured values of physico-chemical, physico-mechanical as
well as index properties and compaction characteristics are similar to those of other lateritic, gravels occurring in West
Africa which are used in road pavement applications. These lateritic clayey gravels have good workability as engineering construction
materials and are rated fair to good as road aggregates in terms of probable in-situ behaviour based on water absorption values. Relationships between maximum dry unit weight and optimum moisture content as
well as those between California bearing ratio and some derived soil parameters such as grading modulus, plasticity product
or plasticity modulus can be described using a third-order polynomial function. The maximum dry unit weight has a bimodal
frequency distribution and can be predicted from logarithm to base 10 of compaction energy with fairly good accuracy. |
| |
| Keywords: | California bearing ratio compaction energy gravel road pavement construction lateritic soils maximum dry unit weight oolitic ironstone optimum moisture content performance rating |
| 本文献已被 SpringerLink 等数据库收录！ |
|
