SELF-HEALING CHARACTERISTICS OF BEAMS IN THIRD-POINT LOADING

Author(s): M. R. Hansen (1), Kaleb Nielsen-Sheffield (2)
Paper category: Proceedings
Book title: Seventh International Conference on Concrete under Severe Conditions –
Environment and Loading, 23-25 September 2013, Nanjing, China
Editor(s): Z.J. Li, W. Sun, C.W. Miao
K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7; e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 60-65
Total Pages: 6
Language : English

Abstract: Concrete exhibits self-healing characteristics where it regains strength after cracking
through continued hydration of cement particles. This study investigates the self-healing
properties of reinforced rectangular 10 cm x 20 cm concrete beams subjected to third point
flexural loading as defined by ASTM C 78. Concrete beams will be made with a general
Type I/II cement with a water-cement ratio of 0.44. The test specimens will be allowed to
deflect such that no crack is greater than 0.5 inches and allowed to heal for 28 days in a
moisture controlled environment. The specimens will be retested in third point loading
establishing the percent of original beam strength regained from the healing. Control beams
will also be tested to gauge the strength regained from the healing. Previous studies conducted
at the South Dakota School of Mines and Technology have examined the self-healing
properties of 10 cm x 20 cm cylinders in split-tension. Results have shown about 50% to
more than 100% strength regained and suggest similar strength regains will be observed for
the flexural beam specimens.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00