Peningkatan Kualitas Pasir Silika Lokal Asal Sidrap Sebagai Pasir Standar Untuk Pengujian Mutu Semen

Pratiwi, Wieke; Karim, Gaos Abdul; Rachmawati, Titi

doi:10.37209/jtbbt.v8i2.120

Cited by 2 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Adapun tahap tahap penelitian yang dilakukan adalah sebagai berikut : (1) Menyediakan material yang terdiri dari pasir silika SiO₂ sebanyak 1000 g, resin 21 g dan katalis 25 g. (2) Pembuatan sampel pengujian dilakukan secara manual, dengan komposisi pasir silika, resin dan katalis, berbentuk silencer diameter 50 mm dan tinggi 50 mm. (3) Melakukan pengujian distribusi tahap paling penting dalam operasi penyiapan pasir silika lokal menjadi pasir standar adalah persyaratan distribusi ukuran partikel dan indeks kebundaran ukuran [8] ditunjukkan pada Gambar 1 pasir sebanyak 25 g dengan waktu pengayakan selama 15 menit dan kekuatan getar pada sieve analyzer skala 5.…”

Section: Tinjauan Pustakaunclassified

Pengaruh curing time dan pemanasan cetakan pasir kering terhadap kadar air, kuat tekan, dan lost of ignition (LOI) untuk aplikasi sand casting

Shieddique¹,

Maulidiawati

Muttahar³

et al. 2022

Turbo

View full text Add to dashboard Cite

Sand molding has the advantage of being able to cast metals with high melting points, such as steel and nickel. Sand for the mold media generally uses a lot of silica sand. Some sand molds contain alphaset binders as well as other binders. Alphaset sand molding is a technique for making molds and metal casting cores that use resin as a binder and catalyst between sands. The addition of a catalyst as a mixture of resin. The process of making specimens for the sand mold test using silica sand SiO2 with a weight of 1000 g using 2.1% alphaphenolic resin and 25% catalyst from resin as additional elements for the resin hardening process. with a manual mixing process and making a sample with a diameter of 50mm in the form of a silencer with the tests carried out are water content, lost of ignition compressive strength and sand size distribution. Good moisture content data on alphaset molds are shown in temperature variations with heating. the results of testing the value of increasing compressive strength with variations in heating curing time 30, 60, 90 get results of 20.45, 22.8 and 31.85. data from the lost of ignition test sample curing time 30 get results of 2.05 The results of the distribution of sand are suitable for steel castings with large, medium and small sizes of castings, water content of curing time of 120, get results of more than 1%, namely 1.06 factors causing the mixin process. The above test shows an increase in compressive strength with variations in heating with lost of ignition testing temperature. The more often sand is used as the mold produces a higher LOI value.

show abstract

Section: Tinjauan Pustakaunclassified

Pengaruh curing time dan pemanasan cetakan pasir kering terhadap kadar air, kuat tekan, dan lost of ignition (LOI) untuk aplikasi sand casting

Shieddique¹,

Maulidiawati

Muttahar³

et al. 2022

Turbo

View full text Add to dashboard Cite

show abstract

Experimental Study on the Roundness of Silica Sand from Sidrap: Improvement by Means of Abrasion and Measurement Using a Practical New Method

Pratiwi¹,

Karim²,

Rachmawati³

2021

KEM

Self Cite

View full text Add to dashboard Cite

Improving roundness of a local silica sand was conducted by abrasion using a laboratory ball mill having a diameter of about 156 mm with steel milling balls of 2800 g. Abrasion was conducted at a fixed speed of 30 rpm; with various sand loadings of 150, 200, and 250 g; and milling time of 60, 105, and 120 min. Roundness was evaluated based on Wadell equation and topography of particle surface was measured by using a new practical method consisting of a build-in camera in mobile phone and common image processing application. Results of measurement using this new proposed method had been confirmed with roundness reported from two service laboratories. The abrasion could increase the roundness of Sidrap sand from 0.20 to an average of 0.31, while the measured roundness of Ottawa standard sand was about 0.46. Three types of mortar were prepared from Sidrap sands before and after abrasion, as well as Ottawa sand. Compressive strengths of mortar after aging of 28 days were 345, 375, and 333 MPa respectively.

show abstract

Peningkatan Kualitas Pasir Silika Lokal Asal Sidrap Sebagai Pasir Standar Untuk Pengujian Mutu Semen

Cited by 2 publications

References 5 publications

Pengaruh curing time dan pemanasan cetakan pasir kering terhadap kadar air, kuat tekan, dan lost of ignition (LOI) untuk aplikasi sand casting

Pengaruh curing time dan pemanasan cetakan pasir kering terhadap kadar air, kuat tekan, dan lost of ignition (LOI) untuk aplikasi sand casting

Experimental Study on the Roundness of Silica Sand from Sidrap: Improvement by Means of Abrasion and Measurement Using a Practical New Method

Contact Info

Product

Resources

About