Properties of ironstone lateritic gravels in relation to gravel road pavement construction

被引：23

作者：

Nwaiwu, C. M. O. ^{[1
]}

Alkali, I. B. K. ^{[2
]}

Ahmed, U. A. ^{[3
]}

机构：

[1] Univ Maiduguri, Dept Civil & Water Resources Engn, Maiduguri 600004, Borno State, Nigeria

[2] Borno State Agr Dev Programme, Maiduguri, Borno State, Nigeria

[3] Minist Works & Housing, Damaturu, Yobe State, Nigeria

来源：

GEOTECHNICAL AND GEOLOGICAL ENGINEERING | 2006年 / 24卷 / 02期

关键词：

California bearing ratio; compaction energy; gravel road pavement construction; lateritic soils; maximum dry unit weight; oolitic ironstone; optimum moisture content; performance rating;

D O I：

10.1007/s10706-004-6374-7

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

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.

引用

页码：283 / 298

页数：16

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