The Effect of Palm Oil Fuel Ash as a Supplementary Cementitious Material on Chloride Penetration and Microstructure of Blended Cement Paste

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Kroehong W., Damrongwiriyanupap N., Sinsiri T., Jaturapitakkul C.

ผู้เผยแพร่: Springer Verlag

ปีที่เผยแพร่ (ค.ศ.): 2016

Volume number: 41

Issue number: 12

หน้าแรก: 4799

หน้าสุดท้าย: 4808

จำนวนหน้า: 10

นอก: 2193-567X

eISSN: 2193-567X

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991219130&doi=10.1007%2fs13369-016-2143-1&partnerID=40&md5=1b6c4948f7df39895e8fd7cb02db13ff

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

This article presents the effect of palm oil fuel ash as a supplementary cementitious material on chloride penetration and microstructure of blended cement paste. Palm oil fuel ash (POFA) was ground to obtain two finenesses: one was the same size as the cement and the other was smaller than the cement. Type I ordinary Portland cement (OPC) was replaced by POFA at 0, 10, 20, 30, and 40% by weight of binder. All paste specimens were prepared using the same water to binder ratio as 0.35. The compressive strength, pore size distribution, total chloride content, free chloride content, and X-ray diffraction analysis of chloride penetration into blended cement pastes were investigated. The results indicated that, at 60 and 90 days, the blended cement pastes containing 30% of POFA with high fineness had 1.6 and 4.9% higher compressive strength than that of the OPC paste, respectively. POFA pastes had a lower chloride diffusion coefficient and shallower concentration profile of free chloride than that of the OPC paste. The specimens containing coarse fineness and small particle size POFA had lower chloride diffusion coefficient than OPC paste ranging between 13.2 and 61.0%. In addition, the chloride diffusion coefficient is linearly correlated with the critical pore diameters. Replacement of OPC by the fine-grained POFA resulted in the decrease in free chloride and in the chloride diffusion coefficient. ฉ 2016, King Fahd University of Petroleum & Minerals.

คำสำคัญ

Critical pore diameter, Friedel’s salt