TY - JOUR
T1 - Constitutive models for fibre reinforced soil bricks
AU - Salih, Mahgoub Mohamed Ali
AU - Osofero, Adelaja Israel
AU - Imbabi, Mohammed Salah-Eldin
N1 - The authors gratefully acknowledge the research support fund provided by the Sudanese Ministry of Higher Education, School of Engineering, University of Khartoum and the School of Engineering, University of Aberdeen.
PY - 2020/4
Y1 - 2020/4
N2 - In this paper, the physical, durability and mechanical properties of soil bricks reinforced with chicken feather fibres (CFF) and sugarcane bagasse fibres (SBF) were studied. The adopted optimum lengths of 15-mm of CFF and SBF were randomly distributed in the soil mix at 1%, 3%, 5%, 7%, 9% and 11% by weight. In total, 525 samples of cubic (3 5 0) and prismatic (1 7 5) soil samples were prepared for each fibre type and tested in accordance with the guidance in the British standards for bulk density, water absorption, compressive strength and tensile strength at 14, 28, 56, 90 and 180 days. With the addition of 7% CFF and 5% SBF, soil brick samples were found to be 98.8% and 78.7% stronger respectively in compression compared to the control mix. Based on the experimental results the stress-strain model describing the soil bricks response to compressive loading for each fibre type was obtained via regression analysis. This study contributes original data to the characterization of soil bricks and provides reference values that can be considered for design purposes. The soil bricks thus developed will contribute to the provision of affordable and sustainable housing construction across the world, particularly in developing countries.
AB - In this paper, the physical, durability and mechanical properties of soil bricks reinforced with chicken feather fibres (CFF) and sugarcane bagasse fibres (SBF) were studied. The adopted optimum lengths of 15-mm of CFF and SBF were randomly distributed in the soil mix at 1%, 3%, 5%, 7%, 9% and 11% by weight. In total, 525 samples of cubic (3 5 0) and prismatic (1 7 5) soil samples were prepared for each fibre type and tested in accordance with the guidance in the British standards for bulk density, water absorption, compressive strength and tensile strength at 14, 28, 56, 90 and 180 days. With the addition of 7% CFF and 5% SBF, soil brick samples were found to be 98.8% and 78.7% stronger respectively in compression compared to the control mix. Based on the experimental results the stress-strain model describing the soil bricks response to compressive loading for each fibre type was obtained via regression analysis. This study contributes original data to the characterization of soil bricks and provides reference values that can be considered for design purposes. The soil bricks thus developed will contribute to the provision of affordable and sustainable housing construction across the world, particularly in developing countries.
KW - Soil bricks
KW - Mechanical characterization
KW - constitutive models
KW - Stress-strain curves
KW - Sustainable construction material
KW - SEM
KW - XRD
KW - Compression test results
KW - ADOBE BRICKS
KW - BEHAVIOR
KW - MECHANICAL-PROPERTIES
KW - COMPRESSIVE STRENGTH
KW - ASH
KW - Constitutive models
UR - http://www.scopus.com/inward/record.url?scp=85077010364&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2019.117806
DO - 10.1016/j.conbuildmat.2019.117806
M3 - Article
VL - 240
JO - Construction and building materials
JF - Construction and building materials
SN - 0950-0618
M1 - 117806
ER -