Influence and mechanism of nanowhisker material for concrete in-situ toughening

Title: Influence and mechanism of nanowhisker material for concrete in-situ toughening
Author(s): W. Lin, D. Zhou, C. Miao, and J. Liu
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 86 - 92
Total Pages: 7
Nb references: 6
Language: English

Abstract: Crack is the most hazardous fact which threatens the durability of reinforced concrete. With the development of modern cement and concrete, the brittleness of cementitious material increases as well as the cracking risk. Nanowhisker material for concrete in-situ toughening explores a novel technique to toughen cementitious material at microcosmic level with physical and chemical effect which is different from the fibers or polymer emulsion. Thus, the cracking resistance of cementitious material could be significantly improved to avoid the direct invasion of injurious medium. In this paper, influence and mechanism of nanowhisker material for concrete in-situ toughening are studied with its application in the concrete engineering of Taizhou highway bridge (the longest bridge with the structural style of „3-tower and 2-span‟). Wedge-splitting tensile specimens and RC beams were prepared at construction site to evaluate the contribution of nanowhisker to the fracture energy and cracking resistance. SEM was adopted to analyze the morphology. Furthermore, the toughening mechanism was introduced at both microcosmic and macrocosmic level.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00