ABSTRACT

Different varieties of fibers are used with cement mortar/concrete which include metallic, polymeric, mineral and vegetable fibers. The aim of this study is to investigate the mechanical properties of concrete reinforced with nail and paper pin. The paper pin of 1 inch length, 0.70 mm diameter and l .22mm diameter of head while nail of 1 inch length, 1.23 mm diameter and 3.36mm diameter of head were used. Fibers were added from 0.5% to 2.5% with an increment of 0.5% (0.5%, 1%, 1.5%, 2%, 2.5%) by weight of cement. Workability, compressive and tensile strength of control concrete and of all modified mixes with addition of nail and paper pin fiber are studied. Workability and compressive strength of all modified mixes with addition of nail fiber is decreased as compared tocontrol mix.Tensile strength of modified mixes with addition of nail fiber is increased as compared to control mix from (0.5%tol %). On further addition of nail fiber from 1.5% to2.5% tensile strength decreased. With the addition of nail fiber atl % maximum tensile strength 4.48N/mm 2
i.e. 15.16% more than the compared to control mix was observed. Tensile strength of all modified mixes with addition of paper pin fiber is increase as compared to control mix from (0.5% to 1.5%). On further addition of paper pin fiber from 1.5% the tensile strength decreases. At 1.5% addition of paper pin fiber maximum tensile strength
5.l 1N/mm2 i.e. 3l.36%more than that of control mix was observed.