INFLUENCE OF AN IMPOSED TENSILE STRESS AND SUBSEQUENT SELF-HEALING ON CAPILLARY ABSORPTION AND CHLORIDE PENETRATION INTO HPFRCC

Author(s): F.H. Wittmann, X. Yao, P. Wang, P. Zhang and T. Zhao
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 251-258
Total Pages: 8
Language: English

Abstract: HPFRCC, if tested in the laboratory, absorbs little water or aqueous salt solutions. This might be considered to be an indication for excellent durability and long service life. In practice, however, most structures and structural elements are designed to be exposed to mechanical stress. The influence of an applied tensile stress on capillary absorption is investigated in this contribution. It was found that the coefficient of capillary absorption increases rapidly after application of a tensile stress corresponding to more than half of the tensile strength. This observation has to be taken into consideration if HPFRCC is to be applied in an aggressive environment. Depending on the environment a maximum allowable strain must be indicated. Otherwise service life prediction will not be realistic.

In another contribution to this conference it is shown that application of a compressive stress has strong influence on durability and service life of structural elements built with HPFRCC too.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00