Manufacturers still use SNI (Standard Nasional Indonesia) concrete for producing concrete in general but there still no Indonesia Technical Guideline SNI which specifically contains for producing or designing the properties of the box culvert itself. In this study, thirty-nine specimens were used with three different models which are 3 beams with fixed - fixed (first model), 3 portals without any ground on the side (second model), 3 portals with land on the side (third model), each of which has a size of 1000 mm x 1000 mm x 160 mm, 1000 mm x 1500 mm x 170 mm, and 1000 mm x 2000 mm x 180 mm with compressive strength 25 Mpa, 30 Mpa, 35 Mpa, 40 Mpa. The dimensions of the box culvert specimens are taken based on the standardized dimensions of Bina Marga then calculated by AASHTO handling with variations in quality and size, and compared with the calculation of simple beams with the placement of fixed-fixed support type and portals with pinned-pinned support type. It has been conclude that thickness of concrete is directly proportionally to the compressive strength, and inversely proportional to deflection.
Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) is a more powerful concrete material compared to the conventional concrete. With its low permeability level, UHPFRC possesses an exceptional durability. Therefore, it is strongly recommended as a material for rehabilitation and strengthening for concrete structures. In addition to its performances, UHPFRC also holds superior mechanical properties, including compressive strength, split tensile strength, ductility and workability. In general, UHPFRC dimensions are categorized to be thinner than the conventional concrete, making it as an advantage of UHPFRC application. However, since all fine and coarse aggregates in the conventional concrete are replaced with very fine aggregates, UHPFRC is unable to be fabricated considering its availability in certain location. To date, researches on UHPFRC as a reinforced material have developed significantly, covering the discovery to increase the compressive strength, flexural strength, high bonding strength, durability and thickness. The aim of this paper is to review previous findings of UHPFRC to be utilized as conventional concrete repair material.
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