Calibration of a Strength Prediction Model for Foamed Cellular Concrete

Abstract

Foamed cellular concrete (FCC) is basically composed by a cement paste or mortar with intentionally incorporated air bubbles and it presents interesting characteristics for the construction industry. To study and understand the material structural behavior, mathematical models have been developed in order to predict its compressive strength. To this end, various researchers have adapted models designed for normal-density (NC) concrete, for considering and include the particular characteristics of FCF. Balshin’s Strength-Porosity Model is a case of model adapted from NC to FCC, because of the nature of the latter material is strongly influenced by the void or pore volume. In this work, an experimental campaign is carried to obtain the constants of this model, using the expression of theoretical porosity developed by Nambiar and Ramamurthy for FCC. In this way, a resistance prediction model is calibrated with the materials and methods used in the local industry. Also, the relationship between the material strength and density is evaluated, and a mathematical equation is developed for quantifying it. An experimental campaign was carried out, the aforementioned constants were determined and compared with those obtained in previous investigations of other authors. The results are shown in tables and graphs. Conclusions are drawn.