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Effectiveness of Fiber Reinforcement on the Mechanical Properties and Shrinkage Cracking of Recycled Fine Aggregate Concrete

Authors
Nam, JeongsooKim, GyuyongYoo, JaechulChoe, GyeongcheolKim, HongseopChoi, HyeonggilKim, Youngduck
Issue Date
3월-2016
Publisher
MDPI
Keywords
recycled fine aggregate; fiber-reinforced concrete (FRC); small fiber volume fractions; mechanical properties; shrinkage cracking
Citation
MATERIALS, v.9, no.3
Journal Title
MATERIALS
Volume
9
Number
3
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8552
DOI
10.3390/ma9030131
ISSN
1996-1944
1996-1944
Abstract
This paper presents an experimental study conducted to investigate the effect of fiber reinforcement on the mechanical properties and shrinkage cracking of recycled fine aggregate concrete (RFAC) with two types of fiberpolyvinyl alcohol (PVA) and nylon. A small fiber volume fraction, such as 0.05% or 0.1%, in RFAC with polyvinyl alcohol or nylon fibers was used for optimum efficiency in minimum quantity. Additionally, to make a comparative evaluation of the mechanical properties and shrinkage cracking, we examined natural fine aggregate concrete as well. The test results revealed that the addition of fibers and fine aggregates plays an important role in improving the mechanical performance of the investigated concrete specimens as well as controlling their cracking behavior. The mechanical properties such as compressive strength, splitting tensile strength, and flexural strength of fiber-reinforced RFAC were slightly better than those of non-fiber-reinforced RFAC. The shrinkage cracking behavior was examined using plat-ring-type and slab-type tests. The fiber-reinforced RFAC showed a greater reduction in the surface cracks than non-fiber-reinforced concrete. The addition of fibers at a small volume fraction in RFAC is more effective for drying shrinkage cracks than for improving mechanical performance.
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