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Soil-water characteristic curve and permeability function of recycled concrete aggregates coated with oil or wax

Rahardjo H.a, Prasad A.b, Krisnanto S.c, Leong E.-C.a, Wang C.L.d

a Department of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore
b Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India
c Department of Civil and Environmental Engineering, Geotechnical Engineering Research Group, Bandung Institute of Technology, CIBE Building Level, Bandung, 40132, Indonesia
d Building Research Institute, Housing and Development Board, Toa Payoh, Singapore, 310480, Singapore

[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019 ASTM International.All Rights Reserved.Recycled concrete aggregate (RCA) is known to be a hydrophilic material. An attempt has been made to convert RCA into a hydrophobic material by coating it separately with oil or wax. Both oil and wax are known to increase the hydrophobicity of soil. Although the soil-water characteristic curve (SWCC) and permeability function of coarse-grained aggregates have been investigated, the effect of the introduction of hydrophobicity (coating it with oil or wax) into the coarse aggregates to their SWCC and permeability function has not been fully understood. The SWCC indicates that coating RCA with oil or wax modifies the drying and wetting curves as compared with RCA without any coating. The air-entry values and water-entry values are also modified upon coating. RCAs coated with oil or wax were found to prevent ingress of water during the wetting test for SWCC. The permeability function of RCAs is also modified.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Coarse aggregates,Hydrophilic materials,Hydrophobic Material,Permeability functions,Recycled concrete aggregates,Soil-water characteristic curve,The soil-water characteristic curves (SWCC),Water entry value[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Hydrophobicity,Oil,Permeability function,Recycled concrete aggregate,Soil-water characteristic curve,Wax[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The authors are extremely thankful to M/s EPChem International Pte Ltd, Singapore and Samwoh Corporation Pte. Ltd., Singapore for providing paraffin wax (Shell GTL Sarawax SX80) and coarse RCA, respectively, free of cost. The authors would also like to thank the Ministry of National Development for providing a grant for the research project (Grant No.: SUL2013-3). The second author would like to express a deep sense of gratitude to the School of Civil & Environmental Engineering, NTU, Singapore for providing an opportunity to work as a Visiting Research Scientist on the research project. The assistance provided by faculty members and staff of the Geotechnical Engineering Group is also acknowledged.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1520/GTJ20170404[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]