Abstract
The aim of this research is to analyse the reliability of the existing methods, and find new ones, for assessing brick resistance to freeze-thaw cycles. A series of bricks were tested against a range of properties; compressive strength ratios pre- to post-freezing and Maage’s factor, were calculated. Using a database created in this way, an analysis of existing classifiers was carried out and new ones were established based on which bricks could be classified into resistant and non-resistant to freeze-thaw cycles. The median pore radius, the ratio of compressive strengths pre- to post-freezing and the water desorption coefficient at 180-360 minutes proved to be good classifiers with a clearly specified cut-off for the distinction between resistant and non-resistant bricks with an acceptable risk of a wrong decision. The ratio of compressive strengths pre to post freezing and the water desorption coefficient at 180-360 minutes were described using the pore system in the brick.
Highlights
RESUMEN: Nuevos métodos para analizar la resistencia de los ladrillos a ciclos de hielo-deshielo
The authors in [5] investigated the correlation between the saturation coefficient and the initial water absorption and concluded that an increase in the saturation coefficient proportionally increases the initial water absorption, which means that the initial water absorption could be one of the parameters that could serve for evaluating brick resistance to freezethaw cycles
Water absorption and desorption were measured in each brick series for a specific time
Summary
The experimental part of this paper is divided into several units. Section 2.1 provides an overview of Materiales de Construcción 71 [343], July-September 2021, e258. New methods for assessing brick resistance to freeze-thaw cycles 3 the methods used during the testing of brick properties given in this paper and Section 2.2 contains the results of brick features tested in such a way.
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