Experimental Study on the Failure of Bamboo Laminated Hollow Section Beam-Column Joints using Glue-in-Rod Bracket

Building materials that emit pollutants, are non-renewable, and generate environmental waste require attention. Wood, a popular and natural material, is facing increasing scarcity, necessitating a substitute. Laminated bamboo emerges as the most akin and natural alternative to wood. Research into laminated bamboo encompasses diverse cross-sections, joint types, and field applications, demanding further investigation.This study aimed to ascertain failure types and damage patterns in laminated bamboo hollow section beam-column joints modified with glue-in rod-bracket connections, using petung bamboo (dendrocalamus asper). The research employed an experimental approach with descriptive analysis. Joint failures were evaluated based on moment-rotation relationships within prescribed rotational limits per standards, while joint damage was assessed through visual inspection of joint components.The study's dependent variables included thread rod diameters of 6 mm, 8 mm, 10 mm, and 4 6 embedded thread rods, while the independent variables were failure types and joint collapses. Results revealed serviceability failures in samples 8.6, 10.4, and 10.6. Joint damage across all test specimens primarily manifested as broken thread rods. The highest joint strength observed was 6.28 kNm in sample 10.6, with the lowest at 2.25 kNm in sample 6.4.Based on the findings, increasing thread rod diameters to achieve ductile joints resulted in longer rotations but did not meet the planned strength due to bracket-induced prying effects causing bolt head failure. Despite this, the collapse type aligned with the research plan. Addressing the bracket's fulcrum effect during field applications requires solutions, potentially involving enlarging the bracket's base and increasing the number of thread rod points. The tests did not damage the laminated bamboo components, emphasizing the need to consider laminated bamboo cross-sectional dimensions and thread rod fulcrum effects in subsequent tests to ensure uniform component performance.

The Effect of Organic Liquid Fertilizer Chicken Eggshell with Onion Skin for the Growth and Yield of Basil Plant (Ocimum basilium L.): Pengaruh Pemberian Pupuk Organik Cair (POC) Cangkang Telur Ayam dan Kulit Bawang Merah terhadap Pertumbuhan dan Hasil Tanaman Kemangi (Ocimun basilicum L.)

Abstract. This study aims to determine the effect of liquid organic fertilizer chicken eggshells and onion skins on the growth and yield of Basil plants which were carried out from May to June 2023, using RBD with POC Concentration Treatment of 4 levels, namely: without POC, 100, 200, 300, 400 ml/L and repeated 3 times. The variables observed were plant height, number of leaves, number of branches, stem diameter, consumption weight and wet weight. Data were analyzed using ANOVA to carry out further tests with Tukey. The results showed that the concentration of POC treatment had a significant effect on the number of leaves, stem diameter, consumption weight and had a very significant effect on fresh weight and had no significant effect on plant height and number of branches. Treatment of POC concentration of chicken eggshell and onion skin 200 ml/L produced the best consumption weight