INFLUENCE OF METAKAOLIN ON THE RESISTANCE OF CEMENT MORTAR TO ELEVATED TEMPERATURES

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dc.contributor.authorUSMAN, J. IBRAHIM, M.M. IBRAHIM, A.G. MUAZU, U.
dc.date.accessioned2024-09-24T08:40:13Z
dc.date.available2024-09-24T08:40:13Z
dc.date.issued2017
dc.description.abstractOrdinary Portland cement mortar exposed to elevated temperature experiences physico-chemical changes that can lead to the deterioration of its strength and durability performance. However, the inclusion ofpovgplanic material in cement mortar modifies the response of mortar to elevated temperatures. This paper examined the effect of metakaolin (MK) on the resistance of cement mortar to elevated temperatures. Two sets of cement mortar specimens, one with 20% MK replacing cement (MK-specimen) and the other without MK (control) were produced. Constant aggregate to cement ratio of 2.75 and water to binder ratio of 0.35 were used to produce the mortar specimens. After 28 days of curing in water and pre-heating at 105°C for 24 hours, the two sets of specimens were heated to different temperatures of 200, 400, 600 and 800°C at a constant heating rate of 2.5"C/min. After achieving the targeted temperatures, the specimens were maintained for 2 hours before cooling to ambient temperature in the furnace. The compressive strengths and ultrasonic pulse velocities of the heated specimens were tested The results showed that the retained compressive strengths of the MK-specimens at 200, 400, 600 and 800"C were 104%, 74%, 68% and 42%, respectively while, the corresponding values for the control specimens were 101%, 67%, 55% and 45%. Moreover, the retained pulse velocities values for the MKspecimens were 95%, 74%, 44% and 36%, while those for the control specimens were 91%, 70%, 41% and 33% at the same temperatures. Impliedly, MK improved the retained compressive strength and pulse velocity of cement mortar at elevated temperatures. Therefore, cement mortar blended with MK may be used as afire resisting construction material.
dc.identifier.citationDepartment of Building, Ahmadu Bello University, Zaria 4Department of Building Technology, Federal Polytechnic, Kaura Namoda, Zamfara Corresponding author; jamilonline05@gmail.com Tel: +2347035740454
dc.identifier.urihttps://kubanni.abu.edu.ng/handle/123456789/13017
dc.language.isoen
dc.titleINFLUENCE OF METAKAOLIN ON THE RESISTANCE OF CEMENT MORTAR TO ELEVATED TEMPERATURES
dc.typePreprint
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