Volume 12, Issue 6 (November 1984)
Insulated Masonry Construction Using Knockout Web Concrete Block
This paper presents details, experimental data, and evaluation of the performance of single-wythe concrete block wall construction incorporating nearly continuous insulation and thermal breaks between the faceshells and webs of two-core lightweight concrete masonry units. The results of lateral-load tests as well as dynamic heat exchange studies are discussed. Analysis of behavior under load indicates no difference in capacity or failure mode for the insulated block units when compared with conventional concrete masonry construction of comparable weight, thickness, and material properties. Overall conductance of insulated units is reduced 10 to 86%, depending on the dynamics of the heat exchange cycle, when compared to conventional units. Proposed refinements in the design of insulated units may achieve thermal performance comparable to “super insulated” construction in other materials.