%K Aluminum compounds; Coatings; Compressive strength; Diffusion; Inorganic polymers; Metabolism; Process engineering; Silicates; Silicon compounds; Sodium; Urea, Alkali activated; Alkali activators; Curing temperature; Diffusion studies; Geopolymer; Inorganic binders; KOH concentration; Low concentrations, Geopolymers
%X Geopolymer is a material that involves natural occurring silico-aluminates and is based on the chemistry of alkali-activated inorganic binders. In this works, geopolymer is produced from flyash as raw material and low concentration of KOH as alkali activator without sodium silicate. The highest concentration of 5.5 M KOH resulted in 3 hours setting time. The highest compressive strength obtained was 21.91 MPa at 4.5 M KOH at curing temperature of 60 oC which reflects good mechanical property and can be developed for coatings. Subsequently, geopolymers synthesized were characterized for possible application as coating for urea. By determining the capability of transportation of urea through geopolymer film showed that the diffusion coefficient of 3.6E-08 m2/s was obtained and reach equilibrium after 20 days © 2016 The Authors.
%D 2016
%R 10.1016/j.proeng.2016.06.545
%O cited By 1; Conference of 4th International Conference on Process Engineering and Advanced Materials, ICPEAM 2016 ; Conference Date: 15 August 2016 Through 17 August 2016; Conference Code:131138
%L scholars7446
%J Procedia Engineering
%T Development of Non Sodium Silicate Flyash-based Geopolymer Film for Preliminary Urea Diffusion Study
%I Elsevier Ltd
%V 148
%A T. Rahmiati
%A K. Azizli
%A Z. Man
%P 128-135