Soil-roots Strength Performance of Extensive Green Roof by Using Axonopus Compressus

Soft Soil Engineering International Conference 2015

Yusoff, N.A.^1,3 ; Ramli, M.N.^1 ; Chik, T.N.T.^1 ; Ahmad, H.^2 ; Abdullah, M.F.^1 ; Kasmin, H.^1 ; Embong, Z.^3

Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Johor, Batu Pahat

86400, Malaysia^1

Horticulture Research Centre, MARDI Headquaters, P.O. Box 12301, Kuala Lumpur

50774, Malaysia^2

Research Center for Soft Soil, Universiti Tun Hussein Onn Malaysia, Batu Pahat Johor

86400, Malaysia^3

关键词: axonopus compressus;    Building thermal performance;    Environmental benefits;    Extensive green roofs;    Geotechnical testing;    Green roof;    Strength development;    Strength performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/136/1/012020/pdf
DOI  :  10.1088/1757-899X/136/1/012020

来源: IOP

【 摘 要 】

Green roof technology has been proven to provide potential environmental benefits including improved building thermal performance, removal of air pollution and reduced storm water runoff. Installation of green roof also involved soil element usage as a plant growth medium which creates several interactions between both strands. This study was carried out to investigate the soil-roots strength performance of green roof at different construction period up to 4 months. Axonopus compressus (pearl grass) was planted in a ExE test plot with a designated suitable soil medium. Direct shear test was conducted for each plot to determine the soil shear strength according to different construction period. In addition, some basic geotechnical testing also been carried out. The results showed that the shear strength of soil sample increased over different construction period of 1st, 2nd, 3rd and 4th month with average result 3.81 kPa, 5.55 kPa, 6.05 kPa and 6.48 kPa respectively. Shear strength of rooted soil samples was higher than the soil samples without roots (control sample). In conclusion, increment of soil-roots shear strength was due to root growth over the time. The soil-roots shear strength development of Axonopus compressus can be expressed in a linear equation as: y = 0.851x + 3.345, where y = shear stress and x = time.