Performance of fiberglass powder reinforced polyurea coating on self compacting concrete

Abstract

Self-Compacting Concrete (SCC) is popular in construction because it newlineflows into forms and consolidates without mechanical vibration. However, its newlinesurface is prone to damage from scratches, shrinkage cracks, impacts, and newlinechemical attacks. Protective coatings can improve durability and extend newlineservice life. This research investigates the performance of fiberglass powder newlinereinforced polyurea (FPRPU) coatings in enhancing the mechanical properties newlineand durability of SCC. The study evaluates coating systems on conventional newlineSCC, steel fiber reinforced SCC (FRSCC), and hybrid fiber reinforced SCC newline(HFRSCC), which incorporates steel and polypropylene fibers. newlineExtensive laboratory tests were conducted to assess mechanical newlineproperties including compressive, flexural, tensile, and shear strength as well newlineas durability parameters such as water absorption and resistance to sulfuric newlineacid attack. The coatings compared include plain polyurea (PU), fiberglass newlinepowder reinforced polyurea with 3% (FPRPU3) and 5% fiberglass newline(FPRPU5), and milled glass fiber reinforced polyurea with five percent milled newlineglass fiber (FRPU5). newlineFiber reinforcement significantly improves SCC strength. Compressive newlinestrength increased by 7.8 percent in FRSCC and six percent in HFRSCC, newlinewhile FPRPU5 provided a smaller 2.2 percent enhancement, showing that newlinecompressive strength alone is not the best performance measure. Greater newlineimprovements were seen in other properties, with splitting tensile strength newlinerising by 10 percent in FRSCC and 19 percent in HFRSCC, and FRPU5 newlineadding another 7.1 percent. newline