Pengaruh Penambahan Abu Sekam Padi Terhadap Sifat Fisis dan Mekanis pada Mortar

Abstract

The research was carried out about the effect of adding rice husk ash to physical and mechanical properties of mortar. Mortar was moulded with three composition comparisons between ordinary portland cement, rice husk ash, and rice stalk fiber. Rice husk ash was burned at temperature of 700 OC for 2 hours, rice stalk fiber was mechanically sliced up to 0.8 mm in size, then mortar molding and maintenance was processed for 28 days. The mortars that had reached the age of 28 days were tested according to the Indonesia National Standard (SNI) including physical properties (water absorption, density), and mechanical properties (compressive strength, modulus of elasticity, modulus of rupture). Characterization of microstructure, morphology and counting all elements on the surface of mortar were processed by using Scanning Electron Microscopy - Energy Dispersive X-ray Spectroscopy (SEM-EDS). The results of research that had been carried out, mortar with the most optimum physical and mechanical properties was mortar B with a composition of 65%: 10%: 25%. The results of the characterization using SEM-EDS showed that the surface of mortar B was better with grain diameter (1.4 ± 0.9) µm and the most dominant element in the mortar was element of Ca and Si which functioned as mortar binder and hardener.

Aktivitas Sediaan Shampo Antiketombe Daun Pepaya (Carica Papaya L.) Terhadap Jamur Candida Albicans

“…Kurang lebih sebanyak 50% dari rakyat didunia mempunyai ketombe, terutama usia 15-50 tahun. (Siregar, 2021) Kasus rambut berketombe yang hingga saat ini adalah suatu hal yang masih sangat meresahkan bagi orang-orang. Ketombe merupakan suatu keadaan dimana kulit kepala akan mengalami pengelupasan dalam lapisan tanduk dan berupa sisik halus.…”

Differential Thermal Analysis of Polyvinyl Alcohol Nanocomposite with Rice Husk Ash as a Filler

“…In this research, rice husks will be used as a filler to produce nanocomposites which can be used as automotive materials. Sudirman, et al [11] used polyvinyl alcohol (PVA) as a matrix to be mixed with collagen as a wound dressing to prevent the growth of bacteria in wounds and accelerate the growth of new tissue.…”