Performance of Lightweight Aggregate Mortar Containing Pumice Blended with Palm Oil Fuel Ash Clinker and Metakaolin for Elevated Temperatures and Chloride Permeability Resistance
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Abstract
This research aims to investigate the performance of lightweight aggregate mortar containing pumice blended with palm oil fuel ash clinker and metakaolin for elevated temperatures and chloride permeability resistance. Specimens were carried out by replacing Ordinary Portland cement with palm oil fuel ash clinker and metakaolin at a percentage of 0, 10, 20 and 30 by weight of binder. The water to binder ratio of 0.35 was fixed for all specimens. Specimens were cured in ambient temperature for the period of 3, 7, 28, 56 and 90 days. The compressive strength and water losing value in ambient and elevated temperatures (200 and 400°C) were determined for hardened cubic specimens in size of 50 × 50 × 50 mm. Rapid chloride permeability test was determined with 100 × 50 mm cylindrical specimen. The specimen blended with 20% metakaolin content has the highest compressive strength in ambient temperature and at 400°C; the thermal conductivity value is also lower than the control specimen. Moreover, the rapid chloride permeability test provided the lowest chloride ion charge passed. The specimen blended with 10% palm oil fuel ash clinker incorporating metakaolin has surpassed compressive strength than the control specimen. SEM microphotographs recognized C-S-H and C-A-H crystals which are products from hydration and pozzolanic activity that uphold the mechanical performance, resist elevated temperature and suppress the charge passed.
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References
สมรรถนะของมอร์ต้ามวลรวมน้ำหนักเบาใส่พัมมิซผสมตะกรันเถ้าเชื้อเพลิงปาล์มน้ำมันและดินขาวแปรสำหรับทนต่ออุณหภูมิที่สูงขึ้นและการไหลผ่านของคลอไรด์
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