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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Zulfario Anugrah Pratama
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Engineering

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Kuat Tekan Dan Waktu Ikat Beton Abu Terbang Di Air Gambut Dengan Metode Statis Dan Metode Wet-Dry Zulfario Anugrah Pratama; Monita Olivia; Iskandar Romey Sitompul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This study examines effect of peat water to the setting time and compressive strength of PCC concrete, and PCC fly ash concrete (PCC-FA). In this study, fly ash was used to replace 25%of weight of cement. This specimen was designed to have the compressive strength of 28 MPa at 28 days. All specimens were cured with two different curing system, static and wet-drysystem. The concrete sample were cured continuously on peat water for 7 and 28 days. While on wet-dry system, the samples were cured by turns wet (soaked on peat water) and dry for 7and 28 days. Peat water had a pH value of 3.0-5.0. The results showed that the addition of fly ash was able to extend the final setting time from 113 minutes to 208 minutes. The compressive strength of PCC (static), PCC-FA (static), and PCC-FA (wet-dry) wereincreased at 28 days immersion in peat water with each increase of 7.24%, 20.45% and 12.89%, respectively. While the compressive strength of PCC concrete (wet-dry) was decreased at 28 days immersion in peat water with a decrease of 4.31%. Based on the test results, it was concluded that the wet-dry cycle adversely affected the concrete strength; however, fly ash addition in the mixture can increase the concrete resistance from the wet-drycycle.Keywords: Fly Ash Concrete, Fly Ash, Wet-Dry, Setting Time, Compressive Strength, Peat Water, PCC
Co-Authors Iskandar Romey Sitompul Monita Olivia