The Effects Of Rice Husk Ash Substitution On Physical And Mechanical Properties Of Clay

Clay is a soil with poor characteristics, which include low weight bearing capacity hence it needs to be fixed. Stabilization is a soil improvement technique, involving the use of cement for increase bearing capacity. However the high cost of cement, led to the investigation of other alternatives, e.g. Rice husk ash (RHA), a pozzolanic agricultural waste, which contains a lot of silica, processed by burning husk ash. This study therefore analyses the effect of substituting RHA on the physical and mechanical property of clay, in an attempt to increase the value of its carrying capacity. Laboratory scale testing was based on ASTM standards, which include California Bearing Ratio (CBR) and Unconfined Compression Test (UCT). The variation of RHA applied to the sample were 3%, 6%, 9%, 12% and 15% of the soil (dry density), at a curing period of 0, 3 and 7 days. The results further showed that the optimum value of UCT (1.05 kg / cm�), was obtained at 6% RHA, within a 7-day curing period. The optimum CBR value (13.12%) was obtained with the unsoaked mixture at 9%, with a 7-day curing period.

REFERENCES

[1] Ghutke, V., Bhandari, P., Agrawal, V., (2018): Stabilization of Soil by Using Rice Husk Ash. The International Journal of Engineering and Science: 92-95.
[2] Sohaib, N., Sarfraz, M., Sana, G., (2018): Use of Acrylic Polymer for Stabilization of Clayey Soil. International Journal of Scientific & Engineering Research, 9: 433-438.
[3] Canakci, H., Celik, F., Bizne, M., O., A., (2016): Stabilization of Clay with Using WasteBeverage Can. Procedia Engineering, 161: 595-599.
[4] Ikra, B., A., Kabir, T., Mowrin, A., N., Habib, A., (2018): Stabilization of Clay Soil Mixed with Wood Ash. International Jurnal of Scientific & Engineering Research 9 (10): 820-823.
[5] Shahiri, J., and Ghasemi, M., (2017): Utilization of Soil Stabilization with Cement and Copper Slag as Subgrade Materials in Road Embankment Construction. International Journal of Transportation Engineering, 5 (1): 45-58.
[6] Bakar, R., A., Yahya, R., Gan, S., N., (2016): Production of High Purity Amorphous Silica from Rice Husk. Prosedia Chemistry, 19: 189-195.
[7] Behak, L., (2017): Soil Stabilization with Rice Husk Ash. INTECH, 3: 29-45.
[8] Sheeba, B., S., and Sasikumar, A., (2017): Utilization of Rice Husk Ash as a Soil Stabilizer. International Research Journal of Engineering and Technology, 04:1799-1801.
[9] Roy, A., (2014): Soil Stabilization using Rice Husk Ash and Cement. Research India Publications, 5:49-54.