The Effects of Dolomite Addition on the Properties of Aluminium Dross Residue-Based Geopolymer Material
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Abstract
Aluminium Dross (AD) is a waste product from the aluminium recycling process, which often faces high disposal costs and illegal dumping issues. The chemical composition analysis revealed a high amount of aluminium compounds and a small amount of silica in AD. In this research, the development of a geopolymer using AD as the main raw material was conducted. Dolomite in the range of 0-30 wt% was added as an additive. In the production of geopolymers, the mixed alkaline solution used as a reaction activator was the mixture of sodium hydroxide (NaOH, 7 M) and sodium silicate (Na₂SiO₃) in a ratio of 1:3. The solid raw materials and alkaline liquid were mixed at a liquid-to-solid ratio of 0.5. The results show that AD residue generates ammonia gas, resulting in a highly porous material with low compressive strength. However, the addition of dolomite enhances material strength as the highest compressive strength was obtained in the sample with 10 wt% dolomite. Further additions of dolomite (20-30 wt%) into the mixtures resulted in lower strength. Additionally, the phase structure, microstructure, and chemical structural changes were investigated using XRD, SEM, and FTIR techniques, respectively. The results indicated that this AD based geopolymer with 10 wt% dolomite established reasonable properties for the lightweight material application.
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เนื้อหาและข้อมูลในบทความที่ลงตีพิมพ์ในวารสารวารสารวิทยาศาสตร์และเทคโนโลยีถือเป็นข้อคิดเห็นและความรับผิดชอบของผู้เขียนบทความโดยตรงซึ่งกองบรรณาธิการวารสาร ไม่จำเป็นต้องเห็นด้วย หรือร่วมรับผิดชอบใด ๆ
บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการตีพิมพ์ในวารสารวารสารวิทยาศาสตร์และเทคโนโลยีถือเป็นลิขสิทธิ์ของวารสารวารสารวิทยาศาสตร์และเทคโนโลยีหากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อกระทำการใด ๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษรจากวารสารวารสารวิทยาศาสตร์และเทคโนโลยี ก่อนเท่านั้น
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