Strength Capacity of Clay Soil Modified With Geosynthetics and Coconut Coir Fibre

Abstract

The strength capacity of the Clay soil modified with Geosynthetics and Coconut fibre. The soil samples were taken from Egbelu Ogbogoro Obio Akpor Local Government Area. The soil samples from the preliminary test showed that the soil is classified as an A-7-5 soil. The cohesion value for the triaxial test increases with the longest cohesion occurring at 8% for coir fiber, 39.31kpa and 6% for Geosynthetics 40.33kpa. The internal friction angle increases with the maximum friction angle occurring at 10% for coir fibre 14.57° and 4% of Geosynthetics 13.03°. The maximum safe bearing capacity of the specimen occurred at 10% for both modifying agents. The clay soil with coir fiber increases the CBR value from 3.53% for 0% unsoaked and 2.06% soaked to 11.35% for 10% unsoaked and 9.22% soaked, while Geosynthetics increased the CBR of the soil at 16.70% unsoaked condition and 11.21% for soaked condition. However, the coir fiber and Geosynthetics of unsoaked and soaked condition meet the minimum requirement oratiof California bearing of 6. The compressive strength (UCS) also improves the strength of the clay soil and the maximum UCS value at 10% for both additives. Based on the test results. Both Geosynthetics and coconut coir fibre modified with soil have proved that they can be used for stabilizing the subgrade soil for the stability of the foundation of structures in Civil Engineering.