Fabric reinforced mortar or concrete technology has bee […]
Fabric reinforced mortar or concrete technology has been developed on the basis of fiber reinforcement, and its research is still in its infancy. The reinforcement mechanism of fabric in mortar or concrete is still under study.
(1) The fabric can increase the flexural strength of the mortar more than the short fiber. In the 3cm thick mortar specimen, the flexural strength of the mortar specimen with a layer of fabric is improved by 9.7 compared with the flexural strength of the mortar specimen. %, which is 6.25% higher than that of fiber reinforced mortar; in the volume of mortar, although the fiber content is the same, the reinforcing effect of the two-dimensional fabric is higher than that of the one-dimensional short fiber;
(2) The integrity of the interface layer between the fabric and the mortar or concrete affects the effect of transmitting stress, the interface strength is small, the reinforcing effect is poor, and the strength of the mortar is even reduced;
(3) The higher the density of the fabric, that is, the higher the fabric content per unit volume, the better the reinforcing effect of the fabric on the mortar or concrete, the weft density is 20 (10 cm)-1, and the density is 40 (10 cm). ) -1 and 50 · (10cm) -1 of two fabrics, the mortar strength of the latter fabric is 16.2% higher than the former, but the fabric density should not be too large, otherwise the gap formed by the warp and weft yarns in the fabric is too small, the mortar Or the concrete aggregate is more difficult to pass through the pores, which reduces the bonding property between the fabric and the mortar or concrete, and finally affects the reinforcing effect of the fabric on the mortar or concrete;