The addition of steel fibers into concrete mix can significantly improve the engineering properties of concrete. The mechanical behaviors of steel fiber reinforced high-performance concrete with fly ash (SFRHPFAC) are studied in this paper through both static compression test and dynamic impact test. Cylindrical and cube specimens with three volume fractions of end-hooked steel fibers with volume fraction of 0.5%, 1.0%, and 1.5% (39.25, 78.50, and 117.75 kg/m3) and aspect ratio of 64 are used. These specimens are then tested for static compression and for dynamic impact by split Hopkinson pressure bar (SHPB) at strain rate of 30–60 s−1. The results reveal that the failure mode of concrete considerably changes from brittle to ductile with the addition of steel fibers. The plain concrete may fail under low-strain-rate single impact whereas the fibrous concrete can resist impact at high strain rate loading. It is shown that strain rate has great influence on concrete strength. Besides, toughness energy is proportional to the fiber content in both static and dynamic compressions.
The dynamic mechanical properties (stress-strain diagram, ultimate stress, ultimate strain and strain rate) and of high strength concrete (HSC) with 5% and 10% silica fume (SF) addition at high strain rate of 10 s-1 to 102 s-1 (3.8 MPa, 4.1 MPa and 4.8 MPa) are determined using Split Hopkinson Pressure Bar equipment. The compressive strength of the HSC at design strength of 80 and 90 MPa is also determined. Results show that the compressive strength of the 5%SF and 10%SF HSC are 83 MPa and 92 MPa, respectively. The dynamic stress-strain diagrams show that the higher the pressure load, the higher the values of ultimate dynamic stress, σu and the ultimate strain rate, ἐu for both percentages of SF addition concrete. The ultimate dynamic stress, σu are between 200 – 250 Mpa and the ultimate strain rate, ἐu is in the range of 95 s-1 and 160 s-1. The ultimate dynamic strain, εu between 0.005-0.008 mm/mm. The dynamic increase factors (DIF) of the HSC are more than 2 compare to normal strength concrete.
Yayasan Riyadul Falah merupakan Lembaga yang bergerak di bidang Pendidikan. Saat ini bangunan sekolah yang ada di Yayasan teresbut sudah difungsikan untuk proses atau kegiatan belajar mengajar. Namun masih mengalami kekurangan kelas ruangan belajar untuk para siswa sehingga dilakukan penambahan ruangan dengan meningkatlkan bangunan menjadi bangunan 2 lantai setelah dilakukan perbaikan dan perkuatan pada struktur bangunan. Tujuan dari kegiatan pengabdian ini adalah membantu pihak pengelola dalam melakukan pembangunan penambahan ruangan kelas dengan meningkatkan bangunan menjadi 2 lantai setelah dilakukan perbaikan dan perkuatan struktur bangunan yang telah dilakukan sebelumnya. Deskripsi kegiatan dimulai dengan persiapan tim survei untuk melakukan pemeriksaan kelayakan bangunan, berkoordinasi juga dengan pengelola Yayasan kemudian dilanjutkan dengan kegiatan gotong royong untuk melakukan pembangunan Gedung 2 lantai dari pekerjaan pembesian, pengecoran, pembuatan dinding ruangan, pembuatan ring balok atas dan pemasangan pintu, jendela ruangan kelas dan finishing.
Bendung River is one of the nine Musi River’s streams located in Palembang. Its estuary is located on Jalan SlametRiyadi 10 ilir, Ilir Timur II Palembang. This river is affected by the annual cycle of the rainy season on September until April. The width of the drainage area of this Bendung river 15,4km2 and it is one of the rivers where flood often occurs. Based on the analysis which was done in the area of Kuto Bendung river in Palembang, the velue of the planning rain debit for ten years was 1,683m3/sec and the largest existing debit was 2,330m3/sec for S1 and S2 waterways, and 1,432m3/sec for S3 and S4 waterways. Thus, there should be further studies to solve the problem well or the correct way by making the dimension becomes larger or fixing it.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.