Investingatiny the effect of geometric feature of polipropilen fiber on the resistance of concrete

Changes in the volumes of concrete can be one of the most principel of crack in the concrete .As the ather materials,the volume of concrete is increased by rise in temperature and is decreased by fall in temperature.In statically indeterminate structures,decrease in volume caused to create harmful cracks in structure.In this resourch,there has been an attempt to make a concrety with an acceptable compressive strength and provide high tensile resistance (for resistance against changes in the volumes of concrete and crack)and high abrasion resistance (for resistance against abrasion.In this study,two kinds of polipropilen fiber with 6 and 12-milimeter long hve been used as well as different precents of microsilica (in stead of part of cement)to increase tensile tensile and abrasion of concrete and the results were compared with the plain concrete.In this research, all the concrete compaosites have been made with the rate two water-cement 0.45 and 0.54.The experiment of compressive strength and abrasion resistance has been performed (on cubic samples) and tensile resistance (on cylindrical samples) indicate of 7 and 28- ay.Obtained results on useful function of polipropilen 12-milimeter fiber as compared with the 6-milimeter fiber in increasing tensile and abrasion samples bearing microsilica inpropertion to the plain samples.Adding fiber to plain concrete dosen’t have any influence on increase in compressive strength.

کلیدواژه ها:

tensile resistance ، abrasion resistance ، polipropilen fiber ، …