Mechanical performance of glass textile reinforced cementitious composites

Increase productivity and innovation working in the environment have had priority in the development of concrete construction over the last decade. The important aim of this development is to fortify the weakness of concrete and making a new way to maximum benefits of this material. One of the important problems of concrete is workability and compaction. Nowadays in many constructions, people use vibration to settle concrete in the mold but many articles show this fact that vibration causes many problems like segregation, time assuming and making noise. In order to solve these problem scientists found Self Compact Concrete technology, which improved the ability of concrete in term of hardening, quality of the surface, durability and finally strength. Concrete, especially Portland cement (PC) based, is the most widely used building material and the second most used materials in the world after water, but because of CO2 emission from cement clinker production and contributed to 4.8% total air pollution(Trends in global CO2 emissions: 2014 Report). Some admixture can be added to concrete in order to decrease the portion of PC or increase the strength and workability of concrete. Superplasticizer (SP) usually increase strength by decrease water needed for workable concrete and mineral admixtures improve workability, plasticity, and strength. Among mineral admixtures, Fly ash (FA) and Ground Granulated Blast.Furnace Slag (GGBFS) are the most reliable binder widely used in concrete. Another besetting weakness of concrete is the brittle nature of concrete. Today many types of researchers indicate some additional material like fibers. The reinforcement phase usually shows better stiffness and strength behavior. Especially textile continuous fibers are the better choice for helping structure to be more ductile. Among all continuous fibers, glass has been seen as a better solution because of characteristics of this natural material. This material currently used in aircraft and automotive industry and mechanical engineering. Providing use this technology in an appropriate way, the costs will reduce drastically. The main costs of this technology related to manufacturing costs such as textile cutting, handling and layer construction. Nowadays, many scientists work on manufacturing process in order to decrease costs of production and find an efficient structure for fiber productions, for example, a cost.efficient production of fiber needs a high integrated performing and short.time manufacturing process. In this research, the rheology of the mixture was investigated by applying the mini.slump test and by recording; we calculated the flow rate behavior of matrix. We pointed out three parallel circles on a testing table in order to capture the flow time at T115, T150 and T170. Consequently, the flow properties were measured by the final spreading diameter of the cementitious matrix. In the second step, two matrix samples, those samples with better flowability, are chosen and the compressive strength and flexural test specimens were produced by using these two samples. In order to obtain the performance of these two matrixes, the compressive strength test was applied to them. In the final step, three points bending test was applied to samples which reinforced by continuous glass textile. The main goal of this research is obtaining the performance of glass textile reinforced cementitious composite.