The reinforcement attributes of multi-scale hybrid fiber throughout the uniaxial compression of ultra-low-weight foamed cement-based composites. (10th May 2020)

• Record Type: Journal Article
• Authors: Yang, Yuanyi; Zhou, Qi; Deng, Yi
• Is Part Of: Construction & building materials. Volume 242(2020)
• Publication Date: 2020-05-10
• Subjects: φ(ε) energy absorption capacity -- σ stress -- σpl the plateau stress -- ε strain -- φd densification strain energy -- εd densification strain of the stress–strain curves -- σh(ε) nominal stress, namely material stress considering the damage -- σ′(ε) nominal stress, namely material stress without damage -- m geometrical factor -- λ Weibull parameter -- ω(ε) energy absorption efficiency -- εs the strain corresponding to the peak stress of the elastic–plastic section -- ω the Weibull coefficient -- t1, t2, t3, t4, t5 primary features parameters of the constitutive model; Foamed cement-based composites -- Multi-scale fiber -- Reinforcement -- Uniaxial compression -- Constitutive damage model; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2020.118184
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The multi-scale fiber reinforcement was achieved while not increasing the density. Fiber hybridization contributed in three distinctive compressive progressions. A continuous constitutive damage model for foamed composites was proposed. Fiber reinforced foamed cement were dominated by the strain-softening behavior. Abstract: A comprehensive experimental investigation of multi-scale fiber-reinforced ultra-low-weight foamed cement-based composites throughout the quasi-static uniaxial compression was presented in this work. The multi-scale hybrid fibers combinations have achieved 133% and 116% increment in compressive strength and specific strength, which were contributed to a comprehensive reinforcement in different compressive stages. This multi-scale fibers combination was deemed as desirable reinforcing elements to supplement each other. Based on a continuous constitutive damage model, the strain-softening behavior of the fiber-reinforced samples in compression was elucidated. This study has provided substantial supporting evidence for practical analysis and numerical simulation in fiber-reinforced cellular materials.