USE OF PUMICE STONE AND OYSTER SHELL WASTE IN GEOPOLYMER MORTAR
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Abstract
The objective of this research was to study the properties and durability of geopolymer mortar using pumice stone mixed with oyster shell waste as the starting powder material. The pumice (GPM) to ground calcined oyster shell (GOS) ratios were 100:0, 75:25, 50:50, 25:75, and 0:100 by weight. The study tested the properties and durability of geopolymer mortar, viz., flow values, compressive strength, strength loss of mortar immersed in sodium sulfate solution, and weight loss of mortar immersed in sulfuric acid solution. The results of the study found that flow values of geopolymer mortar increased with increased GOS volume. The use of GPM mixed with GOS in the proportion of 25:75 by weight was a maximum compressive strength of 26.6 MPa at 90 days. The strength loss of mortars by 5% sodium sulfate solutions for 90 days did not show negative effects on the compressive strength of geopolymer mortar made from GPM mixed with GOS. However, the damage caused by the sulfuric acid solution tended to increase as the amount of GOS increased. The research results showed that geopolymer material from pumice stone mixed with oyster shell waste could be used as a cementitious material in concrete work with low compressive strength, in which sulfate or sulfuric acid resistance is remarkable.
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ลิขสิทธิ์บทความวิจัยที่ได้รับการตีพิมพ์เผยแพร่ในวารสารวิจัยและพัฒนา วไลยอลงกรณ์ ในพระบรมราชูปถัมภ์ ถือเป็นกรรมสิทธิ์ของสถาบันวิจัยและพัฒนา มหาวิทยาลัยราชภัฏวไลยอลงกรณ์ ในพระบรมราชูปถัมภ์ ห้ามนำข้อความทั้งหมดหรือบางส่วนไปพิมพ์ซ้ำ เว้นแต่จะได้รับอนุญาตจากมหาวิทยาลัยเป็นลายลักษณ์อักษร
ความรับผิดชอบ เนื้อหาต้นฉบับที่ปรากฏในวารสารวิจัยและพัฒนา วไลยอลงกรณ์ ในพระบรมราชูปถัมภ์ เป็นความรับผิดชอบของผู้นิพนธ์บทความหรือผู้เขียนเอง ทั้งนี้ไม่รวมความผิดพลาดอันเกิดจากเทคนิคการพิมพ์
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