Document Type : Research Article
Authors
1
Doctor of Engineering Program in Construction Engineering Technology, Graduate College, King Mongkut University of Technology North Bangkok, Bangkok, Thailand
2
Doctor of Engineering Program in Construction Engineering Technology, Graduate College, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand and KMUTNB Techno Park, King Mongkut's University of Technology
3
Center of Excellence in Structural Dynamics and Urban Management, Science and Technology Research Institute and Department of Civil and Environmental Engineering Technology, College of Industrial Technology, King Mongkut’s University
Abstract
This article aims at the development of new eco-friendly functional road materials, examining the optimum mixing ratio of cement, bottom ash, glass fibers and the mechanical properties of soil-cement subbase (pavement) materials. The optimum ratio of cement, bottom ash and glass fibers was dertermined for the mixing of soil-cement as eco-friendly functional road materials. This study was carried out by using the unconfined compression test. All soil-cement samples were mixed at the liquid limit of 88%, varying glass fiber content between 0.5, 1.0, 1.5, 2.0 and 2.5% by volume respectively. The glass fiber lengths were used 3, 6 and 12 mm. The OPC content was added between 2, 4, 6, 8 and 10%, respectively by dry weight. The bottom ash content was 5, 10, 15, 20, 25 and 30% by volume respectively. All soil cement samples were cured for 7, 14, 28, 60 and 90 days. It was found that the optimum OPC soil-cement content mixture was around 8-10% according to ACI 230.1R-09 standard which requires OPC of 10-16% and the optimum fiber content was between 1.0 and 1.5%. The best UCS result for glass fiber length was 12mm. Finally, the optimum bottom ash content was 5-10%, and the recommended curing period should exceed 28-90 days.
Keywords
Main Subjects
)