OPTIMIZATION OF A HYBRID-FIBER-REINFORCED HIGH-STRENGTH CONCRETE. ОПТИМИЗАЦИЯ ВЫСОКОПРОЧНОГО БЕТОНА, АРМИРОВАННОГО ГИБРИДНЫМИ ВОЛОКНАМИ - Versão Russa (original) (raw)

The fracture performance of a high-strength concrete reinforced with steel fibers was studied. Tests of notched beams subjected to fracture in the three-point bend configuration were conducted in accordance with RILEM recommendations TC 162-TDF. The R-curve concepts based on load–CMOD responses and the RILEM criteria were used for the performance evaluation of concrete beams reinforced with steel fiber mixtures and loaded up to fracture. Steel fibers of different types (regular and microfibers), in different proportions were employed as the reinforcement. The hybrid-fiber-reinforced concrete demonstrated a superior performance regarding their resistance and toughness properties as a result of interaction between the fibers. Ключевые слова: материалы композитные, бетон армированный волокнами стальными, композиты гибридные, сопротивление разрушению, композиты цементные Изучены характеристики разрушения высокопрочного бетона, армированного стальными волокнами. Испытания балок с над-резами на трехточечный изгиб до разрушения проведены в соот-ветствии с рекомендациями TC 162-TDF международного союза RILEM. Для оценки характеристик бетонных балок, армированных