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All Journal Jurnal Teknologi Industri Pertanian Dharmas Education Journal (DE_Journal)
Ani Suryani
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Agriculture, Biological Sciences & Forestry Education Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Public Health Other

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PEMANFAATAN FOAMING AGENT DARI MINYAK SAWIT PADA BETON RINGAN Mukarramah Lubis; Ani Suryani; Ika Amalia Kartika; Erliza Hambali
Jurnal Teknologi Industri Pertanian Vol. 29 No. 3 (2019): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2019.29.3.307

Abstract

Foaming agent contains surfactant that facilitates formation of foam to reduce the surface tension of liquid so that it can easily form bubbles. This time, foaming agent is used to produce lightweight concrete. Surfactant can be produced from fatty acid of palm oil named potassium palmitate and natrium laurate. The aim of this study to formulate a foaming agentfor production of lightweight concrete that could form foam that has best performances. Foaming agent for lightweight concrete was made mixturing from surfactant of potassium palmite and sodium laurate, sodium silicate and water. Design of experiment used was Completely Randomized Factorial Design with α = 5% and Duncan post hoc test with α = 5%. Analysis of variance showed consentration of surfactant and consentration of natrium silicate has significant effect in foam stability, foaming ability, foam size and surface tension.The best formulation of foaming agent was foaming agent made from 15% of surfactant, 5% of natrium silicate and 80% of water. Its performances was foam stability of 92.72%, foaming ability of 173.33%, foam size of 249.54 µm and surface tension of 27.78 dyne/cm. Keywords: foaming agent, palm oil, surfactant, sodium silicate, lightweight concrete
MENINGKATKAN KETERAMPILAN MEMBACA PEMAHAMAN SISWA PADA MATA PELAJARAN BAHASA INDONESIA DENGAN MENGGUNAKAN MEDIA GAMBAR SISWA KELAS V SEKOLAH DASAR Ani Suryani
Dharmas Education Journal (DE_Journal) Vol 2 No 2 (2021): Desember
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Univesitas Dharmas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56667/dejournal.v2i2.328

Abstract

This research is motivated by the low interest in students' reading comprehension which is still below the KKM. The purpose of this study is to describe the improvement of students' reading comprehension skills by using picture media. This study uses a qualitative approach with classroom action research design. The research subjects were 29 students of class V SDN 266/VI Bukit Beringin. The design of this research includes the planning stage, the implementation stage, the observation stage and the reflection stage. The collection instruments were a) student activity observation sheets, b) interviews in the implementation of the lesson. The data analysis technique used percentage analysis. This increase can be seen from the average score obtained by students, namely in the first cycle the score is 65, this is below the KKM 70. Then in the second cycle there is an increase in the score obtained by the students, namely 74 with the KKM 70..
Co-Authors Erliza Hambali Ika Amalia Kartika Mukarramah Lubis