SEDL / STP / STP1063-EB / STP24986S

Experimental Investigation of Mortar Compressive Strength Using 5.08 cm. Cubes and 7.62 cm. × 15.24 cm. Cylinders

Matthys, JH
Professor of Civil Engineering and Director of the Construction Research Center, University of Texas, Arlington, Texas

Singh, R
Professor of Civil Engineering and Director of the Construction Research Center, University of Texas, Arlington, Texas

Pages: 12    Published: Jan 1990

Download this paper for $25 PDF (164K)          View License Agreement
Abstract

ASTM C270 “Mortar For Unit Masonry” lists compressive strength requirements under the property specification based on 5.08 cm. cubes. ASTM C780 “Preconstruction and Construction Evaluation of Mortars For Plain and Reinforced Unit Masonry” allows the use of 5.08 cm. × 10.16 cm. cylinders, 7.62 cm. × 15.24 cm. cylinders or 5.08 cm. cubes in determination of mortar compressive strength. The cylinder compressive strength may be considered to be equal to 85% of the cube compressive strength. An experimental investigation of the compressive strength relationship between 5.08 cm. cubes and 7.62 cm. × 15.24 cm. cylinders for (1) laboratory mortars cured in a moist room, (2) job site mortars cured in laboratory air, and (3) job site mortars cured outside has been conducted. The data includes portland cement lime mortar, masonry cemment mortar, and ready mix mortar.