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Influence of Varying Rockwool Fibre Length on Properties of Intumescent Coating

See Yun Chuan, See Yun Chuan (2012) Influence of Varying Rockwool Fibre Length on Properties of Intumescent Coating. Universiti Teknologi Petronas. (Unpublished)

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Intumescent coating is the most common passive fire protection for steel structure. Four formulations of intumescent coating reinforced with different Rockwool fibre lengths, i.e. 4 mm, 6 mm, 8 mm and 10 mm, and a controlled formulation, were developed and tested accordingly to investigate the influence of variable lengths on the properties of the intumescent coating and its char. In the 800oC furnace fire test, intumescent coatings expanded 6 to 10 times their initial thickness and experienced weight loss between 72-79%. The formulation with longest fibre expanded and lost weight the least and appeared to be more compact, denser and contained smaller pores. In the direct fire test of ~1022oC, formulation with longer fibre retarded flammability better, enhanced the adhesion of the coating to the steel substrate and the ability to retain its original form, and provided thermal insulation up to 85-88% of directed heat. From the char strength test, it was found that the formulation with the longest fibre has the highest strength to sustain the char structure before destruction. Degradation temperature, Td, was determined to be at ~380oC for all formulations in TGA yet residual weight increases with the increase in fibre lengths. From the XRD test, char samples of all formulations appeared to be in amorphous state and the major components determined were boron phosphate and boric acid.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Materials - Engineering materials - Polymers - Polymerisation
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 04 Feb 2013 09:36
Last Modified: 25 Jan 2017 09:41
URI: http://utpedia.utp.edu.my/id/eprint/5527

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