Abstract
Static tests were conducted on twelve structural lightweight concrete slabs to investigate the diagonal tension resistance of these slabs. Eight of these slabs are similar to slabs tested previously by Moe. Four of the slabs approximate conditions near an interior column in the flat plate floor system which was the prototype for model tests conducted at the University of Illinois and at the Portland Cement Association laboratories. Three different lightweight aggregates were used in the study. Five slabs were instrumented with electrical resistance strain gages placed on the concrete near the column and at selected points on the steel reinforcement. For each increment of load, both strain and deflection measurements were made. The feasibility of extending Moe's work based on normal weight concrete was studied. Test results show good agreement with Moe's equation when the tensile strength parameter is taken to be f[subscript]sp instead of the square root of the compressive strength. The shear strength of the lightweight slabs tested is generally below that for corresponding normal weight slabs except for the four slabs which represent the slabs used in the model studies. These four slabs had shear strength approximately equal to that observed in the 3/4-scale model test at the Portland Cement Association laboratories.
Ivy, Charles Benjamin (1967). The diagonal tension resistance of structural lightweight concrete slabs. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -179503.