Fresh and hardened properties of Polypropylene fiber added  Self-Consolidating Concrete.pdf

Fresh and hardened properties of Polypropylene fiber

added  Self-Consolidating Concrete

Slamet Widodo 

Abstract:

Self-Consolidating Concrete (SCC) is a special concrete which is highly flowable, non- segregating and by its own weight spread into place, completely fill the formwork even in the presence of dense reinforcement and then encapsulate the rebar without the need of any additional compaction. Similar with other cement-based materials, SCC also has a brittle characteristic. This research conducted to evaluate the effects of polypropylene fiber addition on fresh state characteristics of SCC mixes, and investigate the effects of polypropylene fiber on some hardened properties of SCC. In this research, concrete mixes were added with polypropylene fiber of 0%, 0.05%, 0.10%, and 0.15% volume fraction. Fresh characteristics were evaluated based on its passing ability, flowability, viscosity, and segregation resistance using J-ring, Slump flow, and Sieve Segregation Resistance tests. After 28 days of curing, compressive, splitting tensile strength, and drop-weight impact resistance were tested. Tests results indicate that polypropylene fibers tend to reduce the flowability and passing ability but will increase viscosity and segregation resistance of SCC. Furthermore, it can be concluded that polypropylene fiber reduce deformability of SCC in the fresh state. After 28 days of curing, concrete specimens’ tests indicate that polypropylene fiber addition up to 0.10% of volume fraction tend to improve the compressive strength, tensile strength, and impact resistance of hardened SCC. It also can be suggested that polypropylene fibers allowed to be added into SCC mixes up to 0.10% by volume of concrete.