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All Journal Farmasains : Jurnal Farmasi dan Ilmu Kesehatan Teknotan: Jurnal Industri Teknologi Pertanian Biology, Medicine, & Natural Product Chemistry Indonesia Chimica Acta Lantanida Journal Fullerene Journal of Chemistry Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Madaniya Jurnal Sains dan Edukasi Sains Jurnal Ilmiah Abdi Mas TPB Unram Jurnal Serambi Abdimas Jurnal Abdi Masyarakat Indonesia Healthy Tadulako Journal (Jurnal Kesehatan Tadulako) Jurnal Pustaka Mitra : Pusat Akses Kajian Mengabdi Terhadap Masyarakat Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Journal of Community Empowerment Widya Teknik
Botahala, Loth
University Of Tribuana Kalabahi
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Journal : Widya Teknik

 1 
Determination Rice Husk Amorphous Silica In Alor District As An Additive On The Manufacture Of Composite Portland Cement Loth Botahala
Widya Teknik Vol. 19 No. 2 (2020): November
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v19i2.2103

Abstract

Research on the determination of amorphous silica in Alor rice as an additive in the manufacture of portland composite cement has been carried out. The aim this to determine the concentration of amorphous silica in the form of oxides in rice husk ash with variations in time and combustion temperature. Washed rice husks are heated in an oven at 100 °C for 24 hours. After that rice husk is heated in the furnace with variations in temperature and time. Rice husk ash originating from the furnace combustion is then cooled for 24 hours and smoothed in a blender for 3 minutes, then sifted on the number size 230 sieve and analyzed using X-RD and X-RF. X-RD results showed that the rice husk ash samples were amorphous with the name Chitopentaose caprate (C200H363N5O38). While the results of X-RF at combustion with a temperature of 700 °C and time of 4 hours obtained amorphous silica at 97.50% with a very low CaO concentration of 0.467%.
Study Of Chemical Concentration Of Main Ingredients For Making Portland Composite Cement Loth Botahala; Herianus Manimoy; Yuwinta Erlina Tonu Lema; Eflin Dollu Klaping; M. Tang
Widya Teknik Vol. 20 No. 1 (2021): May
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v20i1.3020

Abstract

This study aims to determine the concentration of the main raw material compounds of cement making before adding limestone additives and determining the compressive strength and porosity and water absorption of cement before adding limestone additives. The result showed that cement with the concentration of 3CaO.SiO2 = 96,9%; 2CaO.SiO2 = negative; 3CaO.Al2O3 = 4,4%; 4CaO.Al2O3.Fe2O3 = 9.7%. If added limestone additive then it will decrease the adhesiveness and create a very wide pore can make a building becomes fragile. Such concentrated cement can not withstand the reaction of other particles from the air.
Tinjauan Ketersediaan Konsentrasi Senyawa Kimia Utama dalam Semen Curah Lobang, Yafia; Botahala, Loth; Mautuka, Zakarias Adrianto
Widya Teknik Vol. 22 No. 1 (2023): May
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v22i1.4126

Abstract

Semen menjadi salah satu kebutuhan utama manusia sebagai bahan konstruksi dalam pembangunan, baik di bidang perumahan, perhubungan, dan lain-lain. Namun semen dengan kualitas rendah akan berdampak pada kualitas pembangunan fisik suatu bangunan. Penelitian ini bertujuan menentukan konsentrasi 4 senyawa utama dalam semen terhadap 4 merk semen di kabupaten Alor yang dikodekan dengan c1, c2, c3, dan c4, dengan menggunakan X-RF dan dilanjutkan dengan analisis menggunakan stoikiometri Bogue. Hasil penelitian menunjukkan bahwa konsentrasi komponen kimia A (Al2O3) tidak ditemukan dalam semen dengan kode semen c1, c2, dan c3, serta konsentrasi komponen kimia  (SO3) tidak ditemukan dalam semen dengan kode semen c1, c2, dan c4. Hasil analisis terhadap sampel c3 dan c4 menunjukkan tidak ditemukannya konsentrasi 2 senyawa utama  dalam sampel semen yakni C2Sdan C3A. Hal ini dapat diduga bahwa semen kehilangan sebagaian senyawa akibat waktu dan jarak distribusi semen dari produsen ke distributor serta akibat situasi dan kondisi dalam lingkungan distributor.
Co-Authors Adolfina Oualeng Agustina, Linur Ficca Alboin Selly Alota, Mariam Andri Permata Timung Asgat Karmani Dakamoly, Adipapa Qrinius Djasibani, Hemy Ratmas Duka, Febby S. Dulweni, Moses Dusse E. Botahala Eflin Dollu Klaping Emirensiana Latuan Fahrul Fahrul Faryda Veronica Lamma Koly Hagar Karlani Hagar Karlani Herianus Manimoy Herlin Silvia Maure Herlince Padamakani Jon Idrison Molina Kande, Fredrik Abia Lapaimou, Nelania Latipra, Martha Erityana Laure, Markus Litbagai, Martinus B. Lobang, Yafia Lobo, Anita T. Dimu Lubis, Suriati M. Tang Maara, Yansie Malihing, Devens Trianus Maria M Meiwati Martasiana Karbeka Mau, Nurhayati Maukafeli, Magdalena Mautang, Hermanto Zakarias Mautuka, Zakarias Melkianus A Manggoa Nahak, Maria Hendriana Palle, Adrial Orians Petrus Mau Tellu Dony Pibo, Lodia Rika Amran Sara Antoneta Atakari Sir, Onisius Solekha, Umi Tena, Yulius Nixon Tersia Pen'au Thomas John Tanglaa Utang, Kristiana Dolu Yanti Malailak Yustina Bapa Yuwinta Erlina Tonu Lema Zakarias Adrianto Mautuka Zakarias Mautuka