PENGARUH PENGGUNAAN SUBTITUSI STEEL SLAG 30% DAN PLASTIK PET (POLYETHYLENE TEREPHTHALATE) UKURAN 30 CM X 1 CM PADA BALOK BETON BERTULANG DENGAN RASIO TULANGAN MINIMUM TERHADAP KAPASITAS GESER - LENTUR
DOI:
https://doi.org/10.26740/rekats.v14n2.p363-371Keywords:
Shear – flexure, Steel Slag, PET Plastic, Flexural Capacity, Crack PatternAbstract
Concrete is a material frequently used in construction projects. It is often combined with steel. Concrete is strong against compression, while steel is strong against tension. However, reinforced concrete is made of non-renewable materials. Therefore, a substitute material is needed for concrete components. This study used steel slag as a fine aggregate substitute and PET (Polyethylene Terephthalate) plastic as concrete reinforcement. The test specimens used concrete cylinders for compressive strength control and concrete beams for shear-flexural strength testing. The cylinders had dimensions of 10 cm in diameter and 20 cm in height, while the beams measured 110 cm x 5 cm x 10 cm. The beam testing method used two-point loading and had an a/d ratio of 2,98. The test results showed that the greatest shear strength was 2.748 kN. The greatest bending moment was 71,487 kg.m. The greatest bending stress was 22,692 MPa. The ultimate load (Pu) was 560,534 kg. The largest average deflection (Δ) reached 9,850 mm. The largest beam ductility value reached 2,059, which is considered medium ductility. All beams experienced initial flexural cracks in the tension zone, then the cracks propagated towards the compression zone and experienced failure in the tension zone. Based on the crack pattern, it shows a shear-flexural crack pattern.
Keywords: Shear – flexure, Steel Slag, PET Plastic, Flexural Capacity, Crack Pattern
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