Production And Properties Of Cementitious Composites With High-Strength And High Modulus PVA Fiber Reinforcement

This paper describes the new production and properties of Ductile Fiber Reinforced Cementitious Composites (DFRCCs). This particular DFRCC contains Polyvinyl Alcohol (PVA) fibers, employing low fiber volume fractions (between 1% and 2%) and high-strength and high elasticity modulus. The influence of the material composites factors, such as fiber volume fractions, fiber aspect ratio, cementitious-sand ratio and the admixture for interface tailoring, on the properties of PVA-DFRCCs is studied. These properties that have investigated include workability, mechanical properties, deformability and durability.The new production of PVA-DFRCCs is successfully made out. which have achieved excellent flexural toughness, multiple cracking and flexural load-deflection hardening. The results show that PVA-DFRCCs can lighter the concrete, develop the compression/flexural/tensile splitting strength and flexural toughness, decrease the deformation of both dry shrinkage and autogeneous shrinkage and decrease the permeability of chloride ion.Experimental results reveal as well that attapulgite can improve significantly properties of interface and optimize properties of DFRCCs. The obtained improvement in the properties is analyzed by microstructure examinations by SEM.