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The development of the Indonesian industry has made considerable progress, which has had a positive impact on the country's economy. In addition to the increasingly rapid success of the industry, the negative impacts are more and more waste generated by the Indonesian industry, such as fiber strapping bands and polystyrene waste that is difficult to break down. This encourages researchers to be able to manage waste results, so that they can be reused without polluting the environment, for example by converting fiber strips into waste and polystyrene into a mix of materials for the manufacture of light bricks. The characteristics of lightweight polystyrene tapes and fibrous fiber strapping bands are suitable for use in the form of lightweight brick mixes to reduce the weight of lightweight bricks to make them lighter without reducing compressive strength or strength. to traction. In general, the weight of lightweight brick varies from 600 kg / m3 to 1800 kg / m3, so that research is carried out by adding polystyrene to 20% of the cylinder volume and adding fiber strapping bands. two sizes, namely 30 mm and 40 mm in variation 0%, 2%, 4%, 6% of the weight of cement. Dr. Soetomo Surabaya says that the higher the percentage of polyester, the higher the compressive strength and tensile strength produced, University trials have shown. These results are inversely proportional to the weight of the light brick volume indicated by the increase in the number of strapping bands, further decreasing the weight of the lightweight brick to conform to the Indonesian National Standard for Lightweight Brick. The optimum polyester content is 6% 30 mm polyester fiber, giving a maximum compressive strength of 3 208 MPa (142.85%) with a tensile strength of 0.54 MPa (63.64 mm). %) and a decrease in weight to 1250 kg / m3 (7.75%).

Addition of Foam Agent Using Polyester and Polystyrene Waste for Lightweight Mixed