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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Rekayasa: Jurnal Teknik Sipil
Kuncoro, Albert
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Civil Engineering, Building, Construction & Architecture

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Analisis Pengaruh Variasi Penggunaan Bahan Aditif Tambahan Superplasticizer Terhadap Properti Pasta Kombinasi Semen-Fly Ash Kuncoro, Albert; Paramitha, Dewanti Ratna; Meok, Lydia Yuniarti; Antoni, Antoni; Hardjito, Djwantoro
Rekayasa: Jurnal Teknik Sipil Vol 8, No 1 (2023): JURNAL REKAYASA TEKNIK SIPIL
Publisher : Universitas Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53712/rjrs.v8i1.2016

Abstract

Dalam proses pembangunan, semen merupakan salah satu komponen yang berperan sangat besar, dan juga salah satu material yang mempunyai dampak lingkungan paling besar juga. Dalam upaya mengurangi penggunaan semen, dan disisi lain juga mengoptimalisasi performa beton, muncul berbagai solusi untuk menggunakan material limbah pengganti/subtitusi binder, maupun penggunaan admixture. Penggunaan fly ash dapat meningkatkan workability dan stabilitas daripada pasta. Disisi lain, partikel fly ash yang lebih kecil daripada semen dapat berkontribusi dalam meningkatkan kepadatan dari spesimen, yang berkontribusi pada meningkatnya nilai kuat tekan. Selain kontribusi akibat binder, rasio air semen (w/c) juga sangat berpengaruh terhadap kekuatan beton. Semakin rendah w/c, maka semakin tinggi pula nilai kuat tekan spesimen, dimana pada sampel pasta dengan binder 100% semen, penurunan w/c sebesar 65.63% dapat meningkatkan kuat tekan hingga 143.77%. Dengan mengetahui sifat dan dosis yang tepat dalam menggunakan superplasticizer, performa dan properti beton dapat ditingkatkan, baik dalam keadaan segar maupun dalam keadaan sudah mengeras.
Pengaruh Molaritas Sodium Hidroksida terhadap Kekuatan Tekan dan Tarik Belah dari Alkali-activated Mortar Berbahan Dasar Feronikel Slag Kuncoro, Albert; Djayaprabha, Herry Suryadi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2 (2021)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (654.868 KB) | DOI: 10.14710/mkts.v27i2.32706

Abstract

The use of cement as the main binding agent in construction contributes approximately 7-10% in total of carbon dioxide gas emissions worldwide. In this study, the replacement of Portland cement using ground granulated ferronickel slag (GFNS) activated by the combination of sodium hydroxide (NaOH) dan sodium silicate (Na2SiO3) was utilized for producing alkali-activated mortar (AAM) as construction material. Four different mortar mixtures were prepared in this experimental work. There were three mixtures of ferronickel slag-based alkali activated mortar (FAM) with the variations of NaOH molarity of 6, 8, and 10M and cement-based mortar mixture (PCM) with water-to-cement ratio (w/c) of 0.5 was used as the control specimens. Overall, the flow and workability of the FAM specimen was lower than the PCM specimen due to the presence of silicate caused a sticky characteristic on the paste. On the other hand, the unit weight of FAM mortar was higher than the PCM specimen. Among all FAM mixtures, the most effective compressive strength and splitting tensile strength results were achieved by the FAM8 mixture, with a compressive strength at 28 days of 33.72 MPa and the splitting tensile strength at 28 days of 2.65 MPa, which had both good workability and chemical reaction of the material.
Co-Authors Antoni Antoni Djayaprabha, Herry Suryadi Djwantoro Hardjito Meok, Lydia Yuniarti Paramitha, Dewanti Ratna