Title: Effect Of Mortar Strength And Strength of Unit On The Strength Of Concrete
Author(s): R. E. Copeland and A. G. Timms
Publication: Journal Proceedings
Appears on pages(s): 551-562
The investigation comprised tests on I08 concrete masonry wallettes laid up with six different mortarswhich ranged in strength from about 150 to 4880 psi and in cementltious material from 100 percent high-calcium hydrated lime to 100 percent Portland. cement. The units, which were of three-oval-core design, ranged in strength from 320 to 4180.psi. One other variable,, type of aggregate, was included. Units within the usual commercial strength range_ 700 to I000 psi) produced computed wall strengths. Of 340 to 665 psi or 41/2 to 8 times the maxumum working stress generally permitted of hollow units. The relatively hi l building codes on walls strengths exhibited by the wallettes demonstrated the adequacy of concrete masonry for bearing wall constructlon.