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Effective Techniques for Gravel Road Development and Improvement

This document outlines the initial conditions and processes for developing a gravel road access area. It includes the evaluation of material types, specifically G5-G6 (Colto RSA), and details on the road section cutting and bypass lane construction. Processes such as mixing with cement, manual distribution of RoadCem, and the windrow method for achieving homogeneous material are described. Additionally, it highlights compaction techniques to reach 95% Mod AASHTO and ensure proper road profiling and camber adjustment.

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Effective Techniques for Gravel Road Development and Improvement

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  1. Initial Conditions of the Road • Initial Conditions of the Road

  2. The nature of gravel road accessing area for development • The nature of gravel road accessing area for development

  3. Category material in situ is • G5-G6 (Colto RSA) • The state of the Road Section

  4. Cutting of the bypass lane • Cutting of the bypass lane

  5. Mixing continued • Mixing continued

  6. Ripping of the Road Process • Ripping of the Road Process • This is to provide for the removal • of stones larger in size than 25% of the • matrix thickness of the road base. • This is to provide for the removal • of stones larger in size than 25% of the • matrix thickness of the road base.

  7. Rocks and stones visible after ripping the surface

  8. Consistency of Material • being worked with

  9. cement used

  10. Mix design • The Mix design for one cubic meter of in situ material is as follows: • Aforementioned will give the following quantities for the 1 km road section at an • average 6 meter width: • *The RoadCem bags is round up to the next whole bags

  11. The even distribution of cement, this is to meet the requirements for the mix design

  12. The Manual distribution of RoadCem

  13. Evenly distributed RoadCem • Evenly distributed RoadCem

  14. Manual distribution of cement

  15. Integrating Cement • Mixing the cement and RoadCeminto the matrix utilizing a Motograder • Mixing the cement and RoadCeminto the matrix utilizing a Motograder

  16. Removal of larger stones, rocks • and litter

  17. The windrow method was used to mix • the soil to obtain optimum • homogenous mix • The windrow method was used to mix • the soil to obtain optimum • homogenous mix

  18. Wetting of the matrix until OMC is achieved for compaction

  19. Compaction Process

  20. Roller compaction until 95 % Mod Aashtocompaction is achieved

  21. the final cut and leveling to • obtain the correct profile and • camber

  22. Final Result

  23. Prepared by: • Office Address: • 51 Loper Avenue • Kempton Park, • Johannesburg, • Spartan ext 2 • 1620 • General contact: • Tel: +27 974 7534/5 • Fax: +2711 974 1835

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