Engineering properties and sustainability assessment of recycled fibre reinforced rubberised cementitious composite

Abstract

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Effect of recycled tyre polymer fibre on engineering properties of sustainable strain hardening geopolymer composites

“…10, the presence of 0.5% and 1.0% RTP fibre in SHGC improved the shrinkage resistance at different extents, where a reduction of 27.51% in drying shrinkage can be observed after incorporating 1.0% RTP fibre into P1.0R0. Excellent shrinkage-restraining behaviour was also reported for cementitious composites containing RTP fibres [40,42,44], which can be attributed to the release of temporarily blocked liquid content at the surfaces of RTP fibres and attached rubber particles [42]. On the other hand, as shown in Fig.…”

“…For instance, the 28-d compressive strength of P1.5R0.5 was around 45.7 MPa which was 10.43% lower than that of P1.5R0. Such weakening effect in compressive strength caused by RTP fibres was also found for cementitious composites [44,47], which can be attributed to the weaker fibre-matrix interaction and lower stiffness of RTP fibres. In addition, the rubber granules attaching the RTP fibres may also contribute to the reduction in compressive strength.…”

“…Once a consistent mixture was obtained, the PVA fibres were slowly added. It should be mentioned that for the mixtures containing both PVA and RTP fibres, the RTP fibres were first mixed with a certain content of AL to avoid fibre clumping or balling [43,44].…”

“…The motivation of introducing RTP fibres in the construction industry is to find a possible usage for them, as storing RTP fibres is a big challenge that may lead to several environmental problems [40]. The existing studies on the effect of RTP fibres in cementitious composites found that the presence of RTP fibres can improve the resistance of the resultant composites to fire spalling [41], autogenous, plastic and drying shrinkage cracking [42][43][44],…”

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

“…Chen et al [ 90 ] developed a sustainable cementitious composite reinforced by a combination of recycled tire steel fiber (RTS) (0.5, 1.0 and 1.5 vol%) and recycled tire textile fiber (RTF) (0.5 and 1.0 vol%). To prevent the negative effect of the large numbers of rubber particles attached to the fiber’s surface, weakening the mechanical properties, a sieving method, as proposed by Chen et al [ 38 ], was applied to clean the fibers from the rubber particles and impurities (43.2% of the total mass of as-received fibers).…”