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All Journal JURNAL ILMIAH MEDIA ENGINEERING Jurnal Teknik Sipil Terapan JURNAL UMBANUA Jurnal Pengabdian pada Masyarakat Prosiding Seminar Nasional Teknik Sipil UMS Seminar Nasional Produk Terapan Unggulan Vokasi Serambi Engineering
Sandri Linna Sengkey
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Journal : Serambi Engineering

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Pengaruh Gradasi Pasir Terhadap Kekuatan Tekan dan Penyerapan Paving Blok Geopolimer Sandri L. Sengkey; Geertje E. Kandiyoh; Stefani S. Peginusa; Dwars Soukotta
Jurnal Serambi Engineering Vol. 9 No. 2 (2024): April 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The quality of paving blocks is greatly influenced by many factors, one of which is sand as the constituent material. Sand has various types and different gradations based on grain size distribution. This difference in sand gradation is the focus of research to determine the effect of sand gradation on the compressive strength and absorption of geopolymer paving blocks made from fly ash. The geopolymer block paving mixture is made with a composition of 10M NaOH, a Na2SiO3/NaOH ratio of 2.5, an alkali activator/FA solution ratio of 0.4 and curing at ambient temperature. The test results show the influence of sand gradation on compressive strength and absorption. The highest compressive strength and lowest absorption values were obtained in the Z3-BP and Z2-AB mixtures. There is a relationship between compressive strength and absorption. The smaller the paving absorption value, the greater the compressive strength.
Pemetaan Kualifikasi Agregat Halus Sebagai Material Konstruksi di Provinsi Sulawesi Utara Sengkey, Sandri Linna; Slat, Ever N.; Nicolaas, Seska; Mantiri, Nixon Servius; Slat, Ventje Berty
Jurnal Serambi Engineering Vol. 10 No. 1 (2025): Januari 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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The quality of the concrete mix is influenced by many factors, one of which is the constituent material. Sand, as one of the concrete forming materials, also contributes to improving the quality and performance of concrete. This study aims to determine the physical characteristics of fine aggregates in North Sulawesi Province and their suitability as concrete materials and their implementation in concrete mix design. The research method in the form of laboratory research includes testing of specific gravity and absorption, sieve analysis, organic material content, silt content and unit weight of sand from 20 quarry sites in North Sulawesi Province. The results of the study showed that 15 sand quarries met the specification standards as concrete materials, while 5 quarries did not meet the specification standards, especially in terms of specific gravity and absorption properties, and fineness modulus, which exceeded the maximum specification limit. The sand grading in North Sulawesi is mostly in the rather coarse sand criteria and is in zone 2. The results of this sand qualification are expected to be useful in concrete mix design.
Co-Authors Dwars Soukotta Freddy Jansen Geertje Efraty Kandiyoh Hombokau, Chris Irmawaty, Rita Julius E. Tenda Muralia Hustim Nicolaas, Seska Nixon Mantiri P Purwanto Peginusa, Stefani Switly runtunuwu, sherley Slat, Ever N. Slat, Ventje Berty Steenie E. Wallah