TAILIEUCHUNG - Fracture behavior of cement mortar reinforced by hybrid composite fiber consisting of CaCO3 whiskers and PVA-steel hybrid fibers

We added CaCO3 whiskers into polyvinyl alcohol (PVA)-steel hybrid fiber system to obtain multiscale hybrid fiber reinforced cement mortar (MHFRC). Three-point bending (3-p-b) tests were carried out on 64 notched beams to investigate fracture behavior of MHFRC. Double K Fracture Criterion (DKFC) and Work Fracture Method (WFM) were employed to obtain fracture parameters. Influence of the volume fraction of CaCO3 whiskers, content of PVA-steel hybrid fiber and water/ cement ratio (w/c) on fracture parameters are discussed. Addition of composite fibers consisting of CaCO3 whiskers and PVA-steel hybrid fibers could improve fracture behavior of MHFRC. As the content of CaCO3 whiskers increases, fracture parameters first increase and then decrease. Content of PVA-steel fibers also affect fracture behavior of the matrix. Thus, an optimum ratio between CaCO3 whiskers and PVA and steel fibers contents exist that provide the best fracture performance of cement matrix: 1 vol % of CaCO3 whiskers, vol % of PVA fibers and vol % of steel fibers (S15P05W10). Influence of the w/c value is also discussed. Fracture toughness (KIC) and fracture energy (GF) of S15P05W10 group decreased as w/c values increased. The synergy of fibers in S15P05W10 was evaluated quantitatively, and the results indicated positive synergy effect on unstable fracture toughness (Kun IC ) and fracture energy (GF) in cement matrix with higher w/c values. | Fracture behavior of cement mortar reinforced by hybrid composite fiber consisting of CaCO3 whiskers and PVA-steel hybrid fibers

• Kiến trúc - Xây dựng
• Fracture behavior
• Cement mortar reinforced
• Hybrid composite fiber consisting
• PVA steel hybrid fibers
• Hybrid composite fiber consisting of CaCO3
• High strain rate deformation
• Dynamic behavior
• Anisotropic response
• Phenomenological based constitutive modelling
• The mechanical response
• báo cáo khoa học
• báo cáo hóa học
• công trình nghiên cứu về hóa học
• tài liệu về hóa học
• cách trình bày báo cáo
• Electrochemistry
• Concrete Material Science
• Wastes Containing
• Reinforced Cement
• Intralaminar Fracture
• Characterization
• Friction stir lap welding
• The interface structure
• The formation of interface structure
• Al Ti FSL welds
• Friction Stir Welding
• Mechanical strength of FSL welds
• Engineering Solid Mechanics
• Mix stir zone forms
• Al–Cu interface layer forms
• Principles of composite material mechanics
• Composite material mechanics
• Material mechanics
• Analysis of laminates
• Dyamic behavior
• Analysis of fracture