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All Journal Astonjadro Jurnal Teknik Sipil-Arsitektur
Setia Romadhon, Eri
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Design of Low Alkali Activator Geopolymer Concrete Mixtures Setia Romadhon, Eri; Antonius, Antonius; Sumirin, Sumirin
ASTONJADRO Vol. 11 No. 3 (2022): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v11i3.7484

Abstract

This paper presents the results of research on the design of geopolymer concrete mixes. The main objective of this research is to develop an efficient and easy design of low-alkaline activator geopolymer concrete mixture, which until now has been the biggest obstacle in the use of geopolymer concrete. The variables reviewed were the amount of alkaline activator was quite low at 4%, room temperature and 60oC ratio of alkaline activator/fly ash (AAS/FA) were 0.35, 0.4, 0.5, 0.6. The test results show the parameters of geopolymer concrete with low alkali activator 4%, sodium silicate/sodium hydroxide ratio 2.5%, sodium hydroxide molarity 14M, type F fly ash and the discovery of the relationship model of compressive strength and the ratio of alkali activator/fly ash with a very high correlation as basic development of geopolymer concrete mix design. The design of the geopolymer concrete mix developed is easy because it is application-based and efficient because it only requires 4% alkaline activator.
RANCANG CAMPURAN BETON MUTU TINGGI DENGAN PENAMBAHAN ADMIXTURE HIGH-SUPERPLASTISIZER DAN RETARDER PADA PROYEK TAMAN ANGGREK RESIDENCE Rahmawati, Siti; Setia Romadhon, Eri
JURNAL TEKNIK SIPIL-ARSITEKTUR Vol. 23 No. 1 (2024): EDISI BULAN MEI 2024
Publisher : FTSP Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54564/jtsa.v23i1.173

Abstract

The role of High-Superplasticizer and Retarder is very dominant on the texture and ease of workmanship of high-quality concrete that we expect. High temperatures throughout the concrete journey to the casting site and fast concrete bonding times are the things that are greatly avoided, so the use of certain doses of retarders is a solution to slow the binding time of the concrete itself. Therefore the use of High-Superplasticizer and Retarder needs to be combined well in order to optimize high-quality concrete in terms of workability. In the Taman Anggrek Residence apartment development project, starting from the inspection of aggregate properties then the calculation for the combination of each aggregate is carried out in accordance with the required specifications. The design of the mixture in this study is the Erntroy-Shacklock method with the properties of the material used are as follows; coarse aggregate with a maximum size of 12.5 mm, admixture with trademarks Viscocrete-1003 (High-Superplasisizer) and Plastiment-P121R (Retarder). Testing of concrete compressive strength was carried out at 7, 14 and 28 days. The results showed that at 7 days the average compressive strength was 37,715 MPa (75.43%), 14 days 45,894 MPa (91,788%), 28 days 58.38 MPa (116.76%).
Co-Authors Antonius Antonius Siti Rahmawati Sumirin Sumirin