TY - JOUR
T1 - High-strength steel-fibre-reinforced concrete
T2 - Potential use for ground slabs applications
AU - Aldossari, Khaled M.
AU - Elsaigh, Walied A.
AU - Alshannag, Mohammad J.
N1 - Publisher Copyright:
© 2018 ICE Publishing. All rights reserved.
PY - 2018/6/1
Y1 - 2018/6/1
N2 - Laboratory and analytical investigations were conducted to study the effect of steel fibres and concrete matrix strength on the behaviour of ground slabs. Three full-scale (3 m 3 m 0.1 m) slabs were precast, placed on a rubber mat, resting on a concrete floor, and centrally loaded either to failure or to the maximum loading-jack capacity. The tested load-carrying capacity of each slab was compared to theoretically estimated values using the Meyerhof model. Test results indicated that the addition of 60 kg/m3 (0.76% by volume) of hooked-end steel fibres to concrete significantly increases the load-carrying and displacement capacities, changes the mode of failure from brittle to ductile, reduces cracking on bottom and top surfaces of the slab and allows a significant reduction in slab thickness. Increasing the concrete matrix strength of steel-fibre-reinforced concrete slab from 45 to 85 MPa had a marginal effect on the load-carrying capacity of the slab at points on the displacement response beyond the first crack point. Furthermore, the Meyerhof model was found to underestimate the load-carrying capacity of the tested ground slabs.
AB - Laboratory and analytical investigations were conducted to study the effect of steel fibres and concrete matrix strength on the behaviour of ground slabs. Three full-scale (3 m 3 m 0.1 m) slabs were precast, placed on a rubber mat, resting on a concrete floor, and centrally loaded either to failure or to the maximum loading-jack capacity. The tested load-carrying capacity of each slab was compared to theoretically estimated values using the Meyerhof model. Test results indicated that the addition of 60 kg/m3 (0.76% by volume) of hooked-end steel fibres to concrete significantly increases the load-carrying and displacement capacities, changes the mode of failure from brittle to ductile, reduces cracking on bottom and top surfaces of the slab and allows a significant reduction in slab thickness. Increasing the concrete matrix strength of steel-fibre-reinforced concrete slab from 45 to 85 MPa had a marginal effect on the load-carrying capacity of the slab at points on the displacement response beyond the first crack point. Furthermore, the Meyerhof model was found to underestimate the load-carrying capacity of the tested ground slabs.
UR - http://www.scopus.com/inward/record.url?scp=85046886515&partnerID=8YFLogxK
U2 - 10.1680/jtran.15.00118
DO - 10.1680/jtran.15.00118
M3 - Article
AN - SCOPUS:85046886515
SN - 0965-092X
VL - 171
SP - 156
EP - 165
JO - Proceedings of the Institution of Civil Engineers: Transport
JF - Proceedings of the Institution of Civil Engineers: Transport
IS - 3
ER -