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All Journal JOURNAL OF SCIENCE AND APPLIED ENGINEERING Buletin Profesi Insinyur
Muhammad Raihan Riandi
Politeknik Negeri Banjarmasin
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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The Effect of Additional Vermiculite on Compressive and Flexural Strength of Concrete Syahril Syahril; Mujiman Mujiman; Desutama Prayogo; Muhammad Raihan Riandi; Lintang Dian Artanti; Ambrosio Martins Nuno
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.4914

Abstract

Concrete is one of the building materials that is used the most. The majority of the volume of concrete is made up of aggregates, which have a significant impact on the characteristics, mix proportions, and economics of concrete. The space created by the absence of fine aggregate can be filled with vermiculite. Vermiculite is a rich mineral that is widely recognized for its exfoliating properties and for expanding quickly when heated. Vermiculite typically has a temperature resistance of up to 1200°C. It is a system of low-density, non-structural building products. In addition to being lighter in weight and odorless, vermiculite offers increased workability, improved fire resistance, and improved resistance to cracking and shrinking also reduce cost of construction. In this research, vermiculite is employed at varying concentrations of 12%, 24%, and 36%. Vermiculite samples from PT.IPI Sunijaya, cement with the Dynamix brand, fine aggregate from the Galunggung area, and coarse aggregate from Cimalaka. The design of this research followed ACI 1991, with a design quality of 15 MPa. The maximum variant on compressive strength and flextural strength of concrete is using 36% of vermiculite because vermiculite has a high capacity for water absorption, adding it to concrete boosts both the compressive strength and flexural strength of the material. Vermiculite will therefore absorb excess water in the mixture and dry out the mortar while keeping the completed product's firmness owing to the granules. This is why it is added to and blended with concrete. Vermiculite particles can be used to patch cracks and holes in concrete.
Pemanfaatan Limbah Fly Ash sebagai Alternatif Pengganti Semen dengan Teknologi Beton High Volume Fly Ash (HVFA) Ratni Nurwidayati; Abdul Karim; Ade Yuniati Pratiwi; Muhammad Raihan Riandi; Nursiah Chairunnisa
Buletin Profesi Insinyur Vol 7, No 1 (2024): Buletin Profesi Insinyur (Januari-Juni)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bpi.v7i1.232

Abstract

Kebutuhan terhadap semen meningkat sejalan dengan pembangunan infrastruktur yang terus meningkat. Hal ini dapat menyebabkan pemanasan global sehingga perlu upaya untuk mengurangi pemakaian semen. Di pihak lain, batu bara masih digunakan untuk sumber energi pada industri PLTU. Abu sisa pembakaran menjadi limbah yang perlu dimanfaatkan dalam volume besar sebagai pengganti semen yang disebut dengan High Volume Fly Ash (HVFA) atau beton dengan persentase fly ash (FA) lebih dari 50%. Penelitian ini mengevaluasi waktu pengikatan, sifat mekanik mortar dan beton HVFA. Variasi FA yang digunakan adalah 0%, 40%, 50%, dan 60% dengan tambahan superplasticizer (SP) yaitu viscocrete 1050 sebesar 0%, 0,4%, 0,7%, dan 1%. Hasilnya menunjukkan kuat tekan tertinggi dari mortar dengan FA 40% dengan SP 1% yaitu 23,45 MPa pada umur 28 hari dan beton dicapai pada persentase FA 40% dengan viscorete 1% sebesar 15,66 MPa pada umur 56 hari. Untuk kuat tarik belah beton tertinggi pada persentase FA 40% dengan SP1% sebesar 2,22 MPa dengan nilai konstanta sebesar 0,59. Semakin tinggi persentase variasi FA maka akan semakin rendah nilai kuat tekan dan kuat tarik belah beton. Disamping itu, semakin tinggi persentase SP maka semakin tinggi nilai kuat tekan dan nilai kuat tarik belah.Kata kunci: High Volume Fly Ash, viscocrete, kuat tekan, kuat tarik belah, waktu pengikatan
Co-Authors Abdul Karim Ade Yuniati Pratiwi Ambrosio Martins Nuno Desutama Prayogo Lintang Dian Artanti Mujiman Mujiman Nursiah Chairunnisa Ratni Nurwidayati S Syahril