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All Journal PILAR Science and Technology Indonesia FROPIL (Forum Profesional Teknik Sipil) IJEMS (Indonesian Journal of Environmental Management and Sustainability) Aptekmas : Jurnal Pengabdian Kepada Masyarakat
Andi Herius
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Journal : Science and Technology Indonesia

 1 
Comparison Analysis of CBR Value Enhancement of Soil Type in Swamp Area by Addition of Fly Ash Indrayani Indrayani; Andi Herius; Arfan Hasan; Ahmad Mirza
Science and Technology Indonesia Vol. 3 No. 2 (2018): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (950.339 KB) | DOI: 10.26554/sti.2018.3.2.73-76

Abstract

Roads was built on swamp areas should be consider the condition of the base soil, since the characteristics of the soil in swamp areas have always inundated and have a low soil carrying capacity (Subagyo, 2006). One of effort that could be done to improve the existing soil condition was used fly ash as a material for soil stabilization (Indera et al, 2016; Mina et al, 2016). This study was conducted to analyze the enhancement of CBR value on various soil types in swamp area by the addition of fly ash. Testing on the values of index properties, compaction, and CBR values was done in laboratory base on ASTM and AASHTO standars. The test results show that the type of soil at the location of the sampling is silty or clay gravel and sand, clay soil, and silty soil. The reduction of optimum water content after the addition of fly ash is the highest decrease of 20.92%. While the highest increase of dry content weight after the addition of fly ash was 0.904 gr / cm3. An enhancement in the value of CBR by the addition of 20% fly ash in the study area, however the increase magnitude depends on the existing soil types, ie 7.99% in the silty or clay gravel and sand, 6 - 8% in the clay soil and 0,22 - 5% on silty soil. This indicates that the addition of fly ash was the optimum used on the type of clay soil.
The Effect of Addition on Pumice and Fiber on Compressive and Fluxural Strength Precast Lightweight Concrete: - Indrayani Indrayani; Andi Herius; Arfan Hasan; Ahmad Mirza
Science and Technology Indonesia Vol. 5 No. 1 (2020): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (960.193 KB) | DOI: 10.26554/sti.2020.5.1.14-17

Abstract

Most of the construction uses concrete as the main building material because concrete has many advantages compared to other materials. Concrete has a high enough weight, various attempts were made to reduce the weight of the concrete for example using lightweight aggregates or concrete made without sand or concrete made hollow Innovations in the development of precast lightweight concrete are urgently needed at this time to support the development of development that is being carried out by the government. From the studies that have been carried out on lightweight concrete and fiber concrete, this research will develop the results of previous studies, namely by combining lightweight concrete and fiber concrete to obtain precast lightweight concrete. This research was conducted to find out how much influence the use of pumice and and fiber on compressive strength and flexural strength of precast lightweight concrete. Variations in the addition of a mixture of pumice with aggregate are divided into 4 comparisons, namely 0: 100, 20: 80, 40: 60, 60: 40, where each mixture is added 0.1% fiber from the volume of concrete, then printed in cube and beam molds. Compressive tests were carried out on the cube and flexural tests were carried out on beams. From the test results was obtained that the addition of pumice to the concrete mixture can cause a decrease in compressive strength of the concrete from 202 kg/cm2 to 129 kg/cm2 whereas with the addition of fiber there is an increase in flexural strength is 24.48 kg/cm2. The specific gravity obtained is 1.664 gr/cm3 so this concrete can be classified into lightweight concrete.
Co-Authors Ahmad Mirza Akhmad Mirza Al Muhammad Fadi Alfin Ashadiq Arfan Hasan Arpan Hasan Daiyan Saputra Darma Prabudi Egal Hardewo Indrayani INDRAYANI INDRAYANI Indrayani Indrayani Indrayani Indrayani . Indrayani Indrayani Indrayani Isranur Annisa Norca Praditya Paramitha Syafarina Wulan, Wulanda Aprillia