Abstract: Cotton fibers are founded in many countries of the world in different sizes and colors. The presence of PP cotton fibers in soils gives an important change in the behavior and convert the properties of these types of soils. This research introduces a method to upgrade the performance of the granular materials which are normally used in subbase courses. The research program aims to investigate the benefit of using PP cotton fiber as reinforcing material on CBR (California Bearing Ratio) for subbase which is adopted as an indication for treatment. A laboratory tests were made on a granular soil (named commonly as subbase) samples to study the difference between cotton fiber and cement use. CBR value of 34.9 affirmed as a guide value to make the comparisons. In addition, five percentages, i.e., 0.5, 1, 2, 4 and 6% are used for each material to study their effect on CBR values. With cement, the CBR increases with all percentages used. The study show that the use of cement reinforcement increase the CBR value more than the use of cotton fiber. While for cotton fiber the maximum percentage is 1% by total mass of soil with more than 45% increase in comparison with the virgin subbase material which corresponding to almost 1.5% of OPC addition.
Tawfek Sheer Ali, Nibras Al-Sahaf, Rasha A. Al-Fatlawy, Abbas Al-Hdabi and Mohammed K. Fakhraldin, 2018. Investigate the Properties of the Granular Materials Incorporated Cotton Fiber. Journal of Engineering and Applied Sciences, 13: 8075-8080.