Synthesis and Properties of Lightweight Geopolymer using Ash from Thermal Power Plants

Abstract

A lightweight inorganic polymer is obtained using ash from thermal power plants, metakaolinite and lightweight aggregate. This inorganic material is activated using small amounts of sodium hydroxide and sodium silicate solution. Processing parameters and various curing conditions, such as curing temperature, curing time and moisture, are investigated. Compressive strength, rate of water absorption and density of each sample were measured.

Rancang Bangun Autoklaf untuk Konversi Bahan Zeolit Alam Menjadi Katalis

“…Sebagai produk alam, zeolit alam diketahui memiliki komposisi yang sangat bervariasi, namun komponen utamanya adalah silika dan alumina. Di samping komponen utama ini, zeolit juga mengandung berbagai unsur minor, antara lain Na, K, Ca, Mg, dan Fe (Bogdanov et al, 2009) [8]. Terlepas dari aplikasinya yang luas, zeolit alam memiliki beberapa kelemahan, di antaranya mengandung banyak pengotor seperti Na, K, Ca, Mg dan Fe serta kristalinitasnya kurang baik.…”

“…Data hasil pengamatan temperatur pada saat reaksi berlangsung dalam autoklaf dapat dilihat pada Tabel 2. Hasil penelitian tersebut didapatkan bahwa kenaikan temperatur sedikit lambat setelah memasuki waktu penelitian 6 jam, kemudian waktu reaksi yang berlangsung selama 8…”

Archives of Mining Sciences

“…The literature on the subject shows that ash granulation is often used with a view to new directions of application (Szczygielski, 2017;Ohnaka et al, 2005). The basic research directions are focused on, for example, the use of various binding materials to improve product properties in line with the expectations of recipients (Gomathi, 2015;Agusta, 2017;Bogdanov, 2012).…”