P. Dejong et al., THE EFFECT OF THE COMPOSITION AND PRODUCTION PROCESS OF CONCRETE ON THE RN-222 EXHALATION RATE, Environment international, 22, 1996, pp. 287-293
In a series of 18 concrete samples, the influence of several parameter
s related to composition and production processes on the radon exhalat
ion rate was studied. The investigated parameters were: amount and typ
e of cement; water-cement ratio, curing conditions and curing time, ty
pe of aggregates, compressive strength, and water evaporation rate dur
ing conditioning, Strong positive correlations with the calculated rad
on emanating power were found far the evaporation rate and the water-c
ement ratio. A negative correlation was found for the compressive stre
ngth. The results are discussed with respect to the capillary pore vol
ume and pore size of the concrete samples. (C) 1996 Elsevier Science L
td.