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All Journal Journal of Geoscience, Engineering, Environment, and Technology INTER TECH
A. Majid, Budiman
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Physics

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Uji Eksperimental Kuat Tekan Beton K-300 Dengan Menggunakan Material Kali Oba Dan Substitusi Fly Ash (Abu Terbang Batu Bara) A. Majid, Budiman; Sumarna, Dede; Konong, Ilham
INTER TECH Vol 1 No 2 (2023): INTER TECH
Publisher : Fakultas Teknik Universitas Bhayangkara Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54732/i.v1i2.1059

Abstract

Kota Sofifi Provinsi Maluku Utara memiliki cukup banyak potensi dalam hal material baik agregat kasar dan halus yang digunakan dalam pencampuran beton, Salah satu tempat yang digunakan untuk mengambil material adalah Kali Oba, dengan bahan tambah Fly Ash PLTU Tidore. Penggnaan Fly Ash bertujuan mengurangi dugaan pencemaran udara oleh limbah bahan berbahaya dan beracun B3 dari hasil pembakaran batu bara dan juga di pergunakan sebagai bahan tambah pembuatan beton. Penilitian ini dilakukan dengan tujuan untuk mengetahui kuat tekan beton dengan bahan material kali oba dan substitusi fly ash dari PLTU Tidore serta pengaruhnya terhadap penggunaan semen. Variabel terikat adalah pengujian beton K-300 sebagai bahan uji beton normal dan variasi Fly ash. Pengujian di lakukan di laboraturium BPJN Maluku Utara sebanyak 20 benda uji kubus pada uumur 28 hari. Kuat tekan beton K 300 umur 28 hari sebesar 300 kg/m2. Sedangkan beton normal yang dicapai yaitu 273 kg/cm2, fly ash 10% yaitu 262 kg/cm2, fly ash 20% yaitu 235 kg/cm2, dan fly ash 30% yaitu 224 kg/cm2. Jadi penggunnaan Fly Ash sangat berpengaruh pada mutu beton, sehingga kualitasnya tidak memenuhi Kualifikasi Mutu Beton K300.
The Effect of Limestone Variations on the Compressive Strength of Clay Soil Stabilized with Pumice Microsilica and Aluminum Hydroxide A. Majid, Budiman; Gaus, Abdul; Adriaty, Yolly; Helda Evita Putri; Rauf, Ichsan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 1 (2026): JGEET Vol 11 No 01 : March (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.1.24976

Abstract

The pozzolanic reaction is a chemical interaction involving calcium hydroxide, silica, and alumina that contributes to the chemical stabilization of soil. An optimized proportion of these three components can yield greater improvements in soil strength compared to the use of a single stabilizing material. This research examines the additional effect of limestone as a calcium source on clay soil stabilized with pumice-based microsilica and hydroxide aluminate. The testing of soil properties in this research follows the American Society for Testing Materials (ASTM) guidelines. The stabilization materials used include pumice, hydroxide aluminate, and limestone. The mechanical behavior of the blend of these three minerals is determined from the findings of the unconfined compressive strength tests, using cylindrical test samples measuring 35 mm in diameter and 70 mm in height. Variations in the addition of lime used to form the mixed matrix were 2%, 4%, and 6% by weight of dry soil. Laboratory test results showed a very significant increase in unconfined compressive strength (qu) compared to natural soil or soil stabilized only with silica and alumina. The optimum value for lime addition in this mixture was 4%, which resulted in a qu value of 52.48 kg/cm².
Co-Authors Adriaty, Yolly Dede Sumarna, Dede Gaus, Abdul Helda Evita Putri Konong, Ilham Rauf, Ichsan