This study investigates the performance of modified reinforced concrete (RC) beams with truss systems, specifically Pratt-truss and Warren-truss, compared to typical reinforcement systems through flexural strength tests. Aiming enhance load-carrying capacity, use angle steel profiles in transform standard bars was analyzed. The evaluation involved eight specimens: two conventional reinforcement, three Pratt-truss, each measuring 15 x 120 cm. focus on initial stiffness, secant ductility....

The increasing demand for sustainable and eco-friendly materials has driven research into natural resource utilization. This study explores the development of geopolymer mortar incorporating fly ash, bemban fiber, kaolin minerals. Due to its hydrophilic nature, fiber requires alkalization treatment enhance bonding strength within matrix. investigates effect 3% NaOH 2 hours on fiber’s properties. results indicate that significantly enhances physical mechanical performance fiber. optimal...

Abstract Geopolymers have great potential to replace conventional cementitious materials and are classified as green materials. Their main constituents silica (Si) aluminum (Al), which can be found in the fly ash material from industrial processes of PLTU. The parameters that affect strength concrete influenced by molarity natrium hydroxide ratio alkalis (NaOH/Na 2 SiO 3 ). This study examined characteristics geopolymer paste mortar specimens. Furthermore, mixture composition was carried out...

The effect of loss ignition, specific gravity, fineness, surface area and soluble fly ash to compressive strength geopolymer paste were studied. Six ashes from two different sources time collection evaluated. Sodium hydroxide sodium silicate used as alkali activator. Concentration mass ratio fixed 14M one respectively. result indicated that the improvement in was more influenced by content ash. Soluble greatly affected compare cement with 20% replacement.

<p>The aim of this study was to investigate the chemical composition and thermal properties kaolin, physical metakaolin, mechanical metakaolin-based geopolymers using bemban fiber. Kaolin calcinated become metakaolin at 600 ℃ for 2 h optimum conditions. The kaolin mostly consisted 59.30% SiO<sub>2</sub>, 34.30% Al<sub>2</sub>O<sub>3</sub>, 3.06% Fe<sub>2</sub>O<sub>3</sub>. transformation into with temperature determined...

Abstract Concrete has high compression strength but low tensile strength. Therefore fibers are added to enhance the South Kalimantan is one of Indonesia’s largest wetlands, and banana tree common in this area. After harvesting, they accumulated or be burned, causing pollution. Utilizing waste as fiber concrete minimizes it. This paper investigated effect length percentage by volume fraction on compressive mortar, tensile, The correlation between was further established. used research 0.1%,...

Self-compacting concrete is an innovative technology with higher flowability properties by adding the mineral admixtures such as superplasticizers and not necessary to vibrate concrete. The banana fibers were used in this investigation because fiber environmentally friendly material good compared synthetic fiber. experimental test consisted of two phases research, i.e., preliminary which had aim investigate appropriate percentage superplasticizer mixed composition self-compacting percentages...

This paper presents the effect of reinforcing bar diameter (db) and concrete cover thickness to ratio (c/db) bond strength between geopolymer by using experimental pull-out test. The mass sodium hydroxide (NaOH) silicate (Na2SiO3) was 2.5 with an 8 M concentration were used in this research. Class F fly ash from Suralaya Power Station, Banten, Indonesia as raw material produce concrete. maximum coarse aggregate 10 mm. result indicated that load on 16 mm higher than 13 failure occurred c/db...

The evaluation of the pull-out experimental result steel reinforcing bar on fly ash-based geopolymer concrete prism is presented in this study. A single with nominal diameter (db) 13mm was pulled out from prism. Three sizes were presented, 100×100×200, 150×150×200, and 180×180×200 m3. Hence ratio cover thickness to (c/db) 3.4, 5.4, 6.6. effects embedment length (Ld) that 3db, 5db, 7db investigated. results showed changed mode failure. failure occurred specimens short (3db), splitting long...

Kerusakan pada jembatan biasanya terjadi akibat penurunan mutu material hingga adanya beban benturan struktur jembatan. Sehingga perlu dilakukan evaluasi kondisi tahap awal yaitu penilaian Dilakukan nilai Jembatan Girder Baja Komposit yang terletak di Kabupaten Tapin untuk mengetahui penanganan tepat baik proses pemeliharaan, rehabilitasi, atau penggantian elemen rusak. Dua metode digunakan Bridge Management System (BMS) dan Condition Rating (BCR). Dari hasil kondisi, akan dihitung prediksi...

Abstract This study replaced fly ash with palm oil fuel (POFA) in geopolymer paste and mortar. The alkaline activator was a mixture of sodium silicate solution hydroxide ratio 2.5. Three variables were evaluated: the raw material combination (100% 25% POFA substituted to ash), mass alkali (60/40, 65/35, 70/30), NaOH molarity (8 M 10 M). mortar utilized based on highest compressive strength paste. fine aggregate binder 65 35. result showed that increased as increased. substitution for from...

The current study focused on developing geopolymer paving blocks for infrastructure facilities utilizing industrial wastes. This research investigated the effect of various curing treatments compressive strength and durability blocks. Three methods, such as laying to room temperature, moist covered by a wet cloth sheet total immersion in artificial acidic water, were studied. paver specimen was produced mixing low calcium fly ash, sand, alkali activator, sodium silicate (Na₂SiO₃) with 8M 10M...

This study compared the compressive strength of geopolymer mortar with different percentages bottom ash as a replacement for fine aggregate. Fly from two sources was blended raw materials. Sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) were used alkaline solutions, ratio 2.5 NaOH concentrations 8M 10M. The percentage substituted up to 30%. result indicated that setting time longer due higher molarity NaOH. at 10M than 8M. Higher significantly decreased strength. However, NaOH, by only...

This study presents an experimental investigation into the industrial foundation piles. The research carried out employed both destructive and non-destructive testing methods to evaluate concrete compressive strength flexural capacity of piles under monotonic loading. Destructive Test (DT) involves a 28-day cylinder test, while Non-Destructive (NDT) utilizes Ultrasonic Pulse Velocity (UPV) Rebound Hammer (RH) tests. test is conducted using loading frame, results are compared GeoPIV-RG, which...

Not all areas have sufficient resources for concrete needs. Coastal are that difficult to obtain suitable sand One of these coastal is Lontar Village, Kotabaru Regency, because this, the people choose use sea as a material. The in Regency not subject any treatment even though has high salt content and uniform fine grains, this can reduce strength concrete. In study, several treatments were carried out, namely no treatment, washing flush using percentage variations 0%, 30%, 50%, 70% 100%...

Football is the most popular and sport not only in Indonesia but also world today. The stadium building a devoted to sports such as football rugby. However, over time, now multi-purpose that can be used for many other activities music concerts, political campaigns, venue events.In previous design carried out by Irfandianto had span between columns of 8m, with roof truss structure Space frame corner welded connection type, taking into account function stands which prioritized comfort view so...

The use of sustainable materials is greatly essential for green construction. Cement-based grout composition can be arranged by partially replacing cement content with the pozzolanic material such as fly ash, bottom or others. investigation utilization ash replacement cementitious pre-placed aggregate concrete was summarized in this study. This experimental study focused on investigating appropriate term flow time using cone apparatus and compressive strength grout. A water-cement ratio,...

Abstract Fly ash waste from the Asam-Asam Power Plant in South Kalimantan continues to increase. Various attempts have been made utilize fly waste, among others. as a basic material for making geopolymers. Geopolymer is environmentally friendly because it replaces all cement with high Silica (Si) and Alumina (Al) wastes such ash. This study aims characterize raw of geopolymer. was filtered using 200 mesh then heated an oven at 105°C 24 hours. The prepared tested physical properties compound...

Abstract In this study, coconut shell ash (CSA) was used as a substitute for cement in the manufacture of paving blocks. The research aims to determine CSA substitution effect on mortar compressive strength. replacement percentages were 0, 3, 5, 8, 10, and 12%. immersed wrapping with plastic conducted curing conditions. strength 24.97, 16.44, 15.26, 14.61, 14.25, 11.87 MPa at 28 days 12%, respectively. While plastic, 21.97, 15.82, 15.10, 14.06, 13.21, 12.62 MPa. Substitution reduced Based...

In South Kalimantan, coconut shell waste is enormous and not utilized massively by the local community so that it covers river mouths even fills bottom of warehouses people's houses, waste/used shells have piled up. This condition causes mouth to narrow becomes a problem quite disturbing community. Currently, most used only as handicrafts making briquettes. The use for paving blocks one solution utilize into construction materials support eco-green reducing cement content. Empowerment...

Abstract This research examined the effect of acid water as a concrete mix material and curing system on compressive strength concrete. The wet-dry conditions in normal low pH was also evaluated. 3 7 conducted this research. Water obtained by diluting HCl solution with tap water. result showed that strengths were 26.23, 26.61, 28.31, 28.31 MPa at 28, 56, 90, 120 days, respectively. In comparison, mixed 25.48, 26.04, 26.42, 26.42 for reduced 28 days 14.39%, 56 18.44%, 90 14.00%, 10.00%....

SMK Negeri 2 Banjarbaru has two competencies from their expertise packages, the Construction and Property Business Modeling Design Building Information. However, academic community lacks knowledge about procedures for mixing normal concrete using local waste testing destructive non-destructive concrete. One of wastes used is fly ash. Tests quality control can be carried out by methods: tests. The test with a compressive strength tensile concrete/concrete splitting strength, while hammer...