Evaluation of material performance in vegetation base mixed with rice husk ash by root index

Abstract

Vegetation base needs some durable materials which have friendliness toward plant life. This research presents some durable and environmentally-friendly vegetation base by utilizing rice husk ash. In this paper, the performance of cement improved soil mixed with rice husk ash as a vegetation base was evaluated by five kinds of examination. Pore size distribution test, compressive test, permeability test, water retention test, and planting experiment were investigated. As a result, the cement improved soils (replacement rate: 50 %, 70 %, 80 %) passed target values of porosity, permeability, and durability. Characteristics of pore size distribution and development of plant rhizosphere were affected by replacement ratio of rice husk ash.