THE EFFECT OF ADDITIONAL MATERIALS CONCRETE USING THE SAND WITH HIGH LEVELS MUD ON DEFLECTION AND FLEXIBLE STRESS ON CONCRETE BEAMS

Structure of concrete blocks consist of concrete and reinforc-ing steel that work together to carry the load acting on the beam. In this study, researchers will examine whether such ad-ditives affect the deflection and bending stress on concrete beams using sand with high mud levels. Variation 7 is a beam that uses sand Jombang plus 13% other additives. The result showed that the concrete beams using sand Jombang with addi-tional material 13 % additive substances able to carry a maxi-mum load of 15,500 kg, with a maximum deflection of 5.1 mm, the bending stress of 504 kg/cm2 and bending moment of 472 500 Kgcm. Concrete beams using Jombang sand with the addition of additive 13 % experienced significant improvement to flexural testing at age 28 days.