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To ascertain if an unbonded capping system was feasible for clay masonry prisms, the compressive strengths of thirty clay masonry prisms capped with an unbonded capping system modeled after ASTM C 1231 were compared with those of thirty masonry prisms capped with ASTM C 67 approved high-strength gypsum cement at the ages of 7 and 28 days. All prisms were constructed by a professional mason using Grade SW, Type FBS cored face brick from the same lot and ASTM C 270 Type S PC-lime mortar. There was no significant difference in mean compressive strength for the two capping methods at either age. In addition, capping with the unbonded capping system was faster and easier. Further, 28-day results obtained using the unbonded capping system had a lower coefficient of variation and higher mean compressive strength than those obtained with high-strength gypsum.
masonry prism, compressive strength, masonry, masonry prism strength, neoprene, unbonded cap, elastomeric, compressive strength of masonry, specified compressive strength of masonry, prisms
Associate Professor of Civil Engineering, Tennessee Technological University, Cookeville, TN
Assistant Professor of Civil Engineering, Tennessee Technological University, Cookeville, TN
President of Wasco, Nashville, TN