Electronic Theses and Dissertation

Penelitian ini bertujuan untuk mempelajari pengaruh komposisi ampas bubuk kopi dan abu sekam padi terhadap sifat fisis dan mekanik material keramik tradisional. komponen utama diambil dari provinsi aceh (aceh besar dan banda aceh) berupa tanah liat sebanyak 85-100%wt, abu sekam padi 5-20%wt dan ampas bubuk kopi sebanyak 10%wt untuk setiap sampel. proses vitrifikasi pada suhu 450 selama 2 jam dilanjutkan dengan sintering pada suhu 900℃ selama 6 jam, ukuran semua partikel lolos 80 mesh. pengujian karakteristik sifat fisik meliputi densitas, porositas serta daya serap air dan pengujian sifat mekanik berupa uji kuat tekan. hasil penelitian menunjukkan bahwa nilai densitas keramik dengan campuran abu sekam padi dan ampas bubuk kopi beragam dari 0,905 – 1,554 g/cm3, nilai porositas dari 24-61%, dan daya serap air dari 15-62%. secara umum campuran abu sekam padi dan ampas bubuk kopi menurunkan kerapatan material yang sehingga kekuatan bahan berkurang dikarenakan bertambahnya nilai porositas dan daya serap air. namun pada komposisi 10% abu sekam padi dan ampas bubuk kopi didapatkan nilai kuat tekan tertinggi dari komposisi lainnya (selain kontrol) dikarenakan densitas yang bertambah sehingga menurunkan porositas dan penyerapan air kata kunci: keramik tradisional, ampas kopi, abu sekam padi

The purpose of the present study is to investigate the influence of coffee grounds and rice husk ash composition on the physical and mechanical properties of traditional ceramic materials. The main components supplied from Aceh province (Aceh Besar and Banda Aceh) consist of clay (85-100%wt), rice husk ash (5-20%wt), and coffee grounds (10%wt) for each sample. The vitrification process was conducted at 450°C for 2 h, and sintering at 900°C for 6 h, with all particles passing through 80 mesh. Physical characterization included density, porosity, and water absorption, while mechanical property tests included compressive strength. The research results indicate that the density values of ceramics with a mixture of rice husk ash and coffee grounds ranged from 0.905 to 1.554 g/cm3, porosity values ranged from 24-61%, and water absorption ranged from 15-62%. Overall, the mixture of rice husk ash and coffee grounds decreased the material density, leading to a decrease in strength due to increased porosity and water absorption. However, at a composition of 10%wt rice husk ash and coffee grounds, the highest compressive strength value was obtained compared to other compositions (except for the control) due to increased density, thereby reducing porosity and water absorption. Keywords: Tradisional ceramics, coffe grounds, rice husk ash