Prediction on compressive strength of hybrid textile reinforced concrete using response surface methodology

This paper uses a hybrid combination of interlayer or a layer-by-layer composite of Alkali-Resistant (AR) Glass and Aramid fibre meshes as reinforcements in Taguchi-optimized cementitious matrix to form Hybrid Textile reinforced concrete (TRC). The effects of the number of layers and arrangements of interlayer hybrid fibre meshes behaviour are compared with varying alike fibre mesh layers in TRC and conventional cementitious matrix composition to investigate compressive strength tests, together with Response surface methodology. The outcomes bestowed that the hybrid TRC performs 1.19 times higher compressive strength when compared to alike fibre mesh TRC because of the synergy influence. Among all the hybrid combinations incorporation of an alternate arrangement of aramid and AR Glass fibre mesh in TRC has enhanced the compressive strength at 28 days irrespective of the total number of fibre mesh reinforcement layers and significantly S4L4 hybrid combination showed maximum compressive strength of about 98.82 MPa. Beyond 4 layers of fibre mesh inclusion in cementitious matrix exhibited a reduction in compressive strength by about 22.34% due to higher percentage of volume fraction showing a massive spalling and debonding in the failure modes. Hybrid TRC with thin walled lightweight facades, panels and columns can be fashioned with superior compressive performance and cost-effectiveness. Central composite designs in the RSM predicted the compressive strength responses from the regression equation models and the relative error percentage is found less than 5, 8 and 10% for 3, 4 and 5 layers of hybrid mesh reinforced TRC in comparison to experimental compressive strength results.