Bond strength of masonry joints under freezing and thawing conditions

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dc.contributor.advisorDawe, John
dc.contributor.advisorL., Dawe
dc.contributor.authorKallouris, George D.
dc.date.accessioned2023-06-07T21:17:37Z
dc.date.available2023-06-07T21:17:37Z
dc.date.issued1988
dc.description.abstractIn o r d e r to examine t h e e f f e c t s of t h e c y c l ic t e m p e r a t u r e changes on the t e n s i l e and shear bond of m a s o n r y , test specimens were exposed to a 24-hour f r e e z e - t h a w c y c l e w h i c h began a t v a r i o u s m o r t a r ages a f t e r c o n s t r u e t i o n . A t o t a l o f one h u n d r e d s p e c i m e n s , b o t h c o n c r e te b l o c k s and c l a y b r i c k s , were t e s t e d i n t e n s i o n . I n a d d i t i o n , f i f t y c o n c r e t e - b l o c k specimens were t e s t e d i n s h e a r . Seven g r o u p s were e x p o s e d t o a f r e e z i n g c y c l e a t d i f f e r e n t m o r t ar a g e s , and t h e n c u r e d f o r 7 d a y s b e f o r e t e s t i n g . T h r e e g r o u ps w e r e c u r e d f i r s t f o r 7 days under d i f f e r e n t e n v i r o n m e n ts p r i o r to t h e f r e e z i n g c y c l e and t h e n t e s t e d. The maximum t e n s i l e and shear bond f o r c o n c r e te b l o c k s o c c u r r e d when f r e e z i n g took p l a c e 8 h o u r s a f t er c o n s t r u c t i o n ; however, f o r t h e c l a y b r i c k s , t h e h i g h e st t e n s i l e bond s t r e n g t h o c c u r r e d when f r e e z i n g t o o k p l a ce i m m e d i a t e l y a f t e r c o n s t r u c t i o n . For t h e s p e c i m e n s w h i c h were c u r e d b e f o r e f r e e z i n g , t h e h i g h e s t bond was e x h i b i t e d i n t h e c a s e o f t h e 100% humid e n v i r o n m e n t , and t h e l o w e s t was f o r t h e case of c o n t i n u o u s f r e e z i n g e n v i r o n m e n t . R e s u l ts i n d i c a t e d t h a t e a r l y p r o t e c t i o n of c o n c r e t e b l o c k s from f r e e z i n g i s e x t r e m e l y i m p o r t a n t f o r t h e d e v e l o p m e n t o f h i gh bond s t r e n g t h s . On the o t h e r hand, i n t h e case o f c l ay b r i c k s , p r o t e c t i o n was found t o be more e s s e n t i a l a t l a t er m o r t a r ages.
dc.description.copyrightNot available for use outside of the University of New Brunswick
dc.description.noteKallouris, George D (1988). Bond strength of masonry joints under freezing and thawing conditions . (Engineering Senior Report no. T-1407 1988). Fredericton : University of New Brunswick, Dept. of Civil Engineering T-1407 1988 1882/14991
dc.format.extentix, 63 pages
dc.format.mediumelectronic
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/35222
dc.language.isoen_CA
dc.publisherUniversity of New Brunswick
dc.rightshttp://purl.org/coar/access_right/c_16ec
dc.subject.disciplineCivil Engineering
dc.titleBond strength of masonry joints under freezing and thawing conditions
dc.typesenior report
thesis.degree.disciplineCivil Engineering
thesis.degree.fullnameBachelor of Science in Engineering
thesis.degree.grantorUniversity of New Brunswick
thesis.degree.levelundergraduate
thesis.degree.nameB.Sc.E.

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