건설재료시공학연구실

Building material & construction lab.

In this study, 150 and 200 MPa ultrahigh-strength concrete (UHSC) specimens were mixed with polypropylene and nylon fibers and heated according to the ISO 834 heating curve. The effects of mass loss of each organic fiber on moisture migration and water vapor pressure reduction in concrete were assessed. Spalling was controlled when 0.15 to 0.25 vol% fiber was added to the specimens. The mass loss of the organic fibers effect on the pore network formation in UHSC. The nylon fiber formed pores below melting temperature via drying and allowed for moisture movement, whereas the propylene fiber effectively reduced the vapor pressure because of rapid mass loss above the melting temperature.

 https://doi.org/10.3151/jact.18.339