Nowadays, using of 3D fabrics is demonstrate increasing to produce composites with reinforcement in different directions. For instance, usage of 3D fabric in civil industry improves tensile and flexural strength of concrete. In present study, two types of fabric including geotextile and knitted fabric were used to reinforce cementitious matrix. In 3D fabric sample containing geotextile, three types of fabric were made with different orientation angle of spacer yarns. 3D knitted fabric were also fabricated in two types including with and without spacer yarns. High tenacity polyester yarn was used to produce 3D knitted spacer. After that 3D fabrics were filled with cement mortar. The cement mortar that used in this study was contained cement, waste stone powder and water. Using waste stone powder is a useful method to recycle this waste material and to reduce environmental impact of this material. Three point bend and heat transfer tests have been conducted on textile reinforced concrete (TRC) samples containing geotextile. Three point bend test has been also carried out on TRC samples containing 3D knitted spacer. The three point bend test results for TRC samples containing geotextile showed that the flexural strength would be increase by decrease of orientation angle of spacer yarns. In addition, decrease orientation angle of spacer yarns cause to increasing of heat transfer in TRC samples. On the other hand, for TRC samples containing 3D knitted spacer fabric, presence of spacer yarns cause to increase of flexural strength in comparison 3D spacer fabric without spacer yarns. In the final, finite element method has been used to model the flexural behavior of TRC samples. Finite element (FE) modeling for samples containing polypropylene spacer yarn and geotextile were done in macro scale. The outputs of FE model are compared to experimental results whereas showed good agreement between software and experimental analysis. To modeling of TRC samples containing 3D knitted spacer in the first, flexural behavior of TRC samples with different location of 3D knitted spacer fabrics was investigated in meso scale. The modeling result show that the best location of knitted fabric to improve flexural strength of cementitious matrix is at the bottom of neutral axis and the worst location is in the upper of neutral axis. In addition, increase of weft per centimeter (wpc) leads to decreasing of the flexural strength of TRC. Consequently, FE analysis was done in macro scale for TRC samples containing 3D knitted spacer fabric. Moreover, an equation to calculate the reinforcing efficiency factor of fabric and spacer yarns in concrete was developed and the reinforcing efficiency factor were calculated for all TRC samples. Key words : Textile concrete, three point bend test, heat transfer, composite, finite element modeling, reinforcing efficiency factor.
