Development of High Strength Self Compacting Mortar with Hybrid Blend of Polypropylene and Steel Fibers

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Author(s) Souradeep Gupta
Pages 571-576
Volume 4
Issue 10
Date October, 2014
Keywords self-compacting concrete, hybrid fiber, steel fibers, PP fibers, durability


Use of self-compacting concrete (SCC) is gaining popularity due to its flowability and hence higher workability but producing SCC of elevated mechanical properties and better durability aspects often is a challenge to the construction industry. Hybrid fiber systems have been found to be effective in previous research works to improve mechanical properties and thus the issue has been addressed here through research on combination of steel and polypropylene (PP) fibers in SCC mix. Combination of steel and PP fibres has been tried and they seem to affect strength and other properties in different ways. Total Fiber content was kept constant at 1.5%. There was an increase in compressive strength and a much higher improvement in flexural strength through use of hybrid fibers along with durability aspects such as drying shrinkage, water penetration length and loss in strength due to exposure of sea water (90 days) saw considerable improvement. Workability was reduced when fiber was added to flowable SCC used and demanded increase in superplasticizer dosage to attain the same slump value as control.

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