Pengaruh Penggunaan Repair Mortars Structural Dan Penambahan Tulangan Terhadap Kapasitas Lentur Balok Beton Bertulang Pasca Retrofit.

The structural capacity degradation of reinforced concrete beams requires an effective retrofitting method. This experimental study aims to analyze the effect of combining non-shrink structural repair mortar (Mapefill GP) and additional side reinforcement (2D10) on the flexural capacity of post-retrofit reinforced concrete beams. Test specimens consisting of beams with dimensions of 140 cm × 22 cm × 24.1 cm were tested under a two-point loading configuration at 28 days of age. Test results revealed that control beams with side reinforcement exhibited initial cracking (Pcr) at 51.1 - 52.84 kN (deflection of 2.3 mm) and attained a maximum ultimate load (Pult) of 75.7 - 76.07 kN. Meanwhile, the post-retrofit beams initiated cracking at 43.1 kN (deflection of 3.0 mm) and sustained a maximum ultimate load of 67.6 - 69.5 kN. Both beam configurations demonstrated ductile flexural failure modes. The non-retrofitted beam with side reinforcement showed a 10.55 % higher ultimate capacity compared to the retrofitted beam. Nevertheless, the integration of structural repair mortar with additional reinforcement effectively recovered 88.9 % to 91.3 % of the initial beam's ultimate load capacity. Consequently, this combined retrofitting scheme is proven effective in restoring the structural performance and flexural capacity of damaged reinforced concrete beams.