Abstract
High-Performance Fiber-Reinforced Concrete (HPFRC) is widely used in infrastructure applications due to its mechanical properties such as fracture toughness, ductility, control of crack width, and plate thickness reduction compared to normal concrete. However, there are still doubts about the strategy to develop the concrete technology to meet the sustainability requirements in the construction process. This study aims to investigate the improvement of flexural performance on HPFRC plates that utilize Portland Pozzolana Cement (PPC) with various compositions of steel fiber. This research uses PPC, Lumajang sand, gravel from the Malang area, water, silica fume, superplasticizer, and steel fiber. Tests were performed on 1600 mm x 900 mm x 80 mm HPFRC plates. The average HPFRC compressive strength is 59.59 MPa. The splitting tensile strength is 3.54 MPa. Steel fibers vary from 0.2% to 1.0% of the HPFRC plate volume. The test was performed with the three-point bending method. Observations were made to the load capacity, deflection and the crack pattern of the HPFRC plates. The study shows that the optimum bending strength failure of the HPFRC plate is obtained when the steel fiber composition is about 0.8% with an external load value of 31.76 kN and a deflection of 14.99 mm.
Highlights
High-Performance Fiber-Reinforced Concrete (HPFRC) is widely used in infrastructure applications due to its mechanical properties
This study aims to investigate the improvement of flexural performance on HPFRC plates that utilize Portland Pozzolana Cement (PPC) with various compositions of steel fibers
This research uses Portland Pozzolana Cement (PPC) according to SNI 0302:2014 [10], gravel from the Malang area; Lumajang sand; water; silica fume containing extremely fine latently reactive silicic dioxide conforming to BS EN 13263-1:2005 with a total chloride ion content of < 0.3 M-% and a density of ~0.65 kg/L; steel fiber with type Dramix@ 3D, l/d aspect ratio 80, length 60 mm; Bright Glued and superplasticizer Polycarboxylate Sika® ViscoCrete®-7150 according to BS EN 934-6:2001 [11]
Summary
High-Performance Fiber-Reinforced Concrete (HPFRC) is widely used in infrastructure applications due to its mechanical properties. Ductility, durability, control of crack width, plate thickness reduction and increased permissible connection spacing compared to normal concrete are the advantages of the mechanical properties of HPFRC. Many factors have been shown to influence the flexural tensile strength of the HPFRC element, the level of stress, size, age and confinement to concrete flexure member [1]. The bond between concrete and steel reinforcement embedded in the HPFRC plate has a function to transfer of force between reinforcement and concrete. The bond between the steel and HPFRC material consists of three mechanisms: adhesion, friction and mechanical interlocking [2]. Post-cracking or residual tensile strength of a structural element design manufactured with HPFRC material is a very important property [4]
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