Effect of embedment length of untreated natural fibres on the bond behaviour in cement mortar

2018, Volume 12, Issue 4

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Frontiers of Structural and Civil Engineering >> 2018, Volume 12, Issue 4 doi: 10.1007/s11709-017-0454-2

Effect of embedment length of untreated natural fibres on the bond behaviour in cement mortar

Department of Civil Engineering, Pondicherry Engineering College, Puducherry 605014, India

Accepted: 2018-01-09 Available online: 2018-11-20

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Abstract

The present investigation is focused on studying the effects of various matrices with 1:3, 1:4 and 1:5 mortars and fibre types of sisal and coir on the bond behavior at various ages of curing, i.e., 24 h, 3 d, 7 d and 28 d. The other parameters included in the investigation are water/cement (w/c) ratio, sand gradation and embedment length of fibres. In addition, the type of failure of sisal and coir fibres for different mixes of mortars at various curing ages is also reported. From the results, it is seen that the bond strength is improving with respect to age of curing in case of sisal fibres, but decreases in case of coir fibres. The failure of fibres due to fibre fracture is observed in sisal fibres and fibre pullout is observed in coir fibres. The other varying parameters such as mortar mixes, sand gradation, w/c ratio and embedded length also showed significant effect on bond behaviour of sisal and coir fibre with the cement mortar mixes.

Keywords

bond strength ; cement mortar ; natural fibre ; pullout test ; type of failure

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