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Abstract

 Widespread opinion holds that calcareous rocks have limited suitability for use in the production
 
 of aggregates and stone products having adequate frost resistance. However, some of the rocks, in
 
 particular those from earlier geological periods, provide a promising alternative to silicate rocks.
 
 The paper presents results of the analysis of Devonian carbonate rock originating from two selected
 
 mines in the Swietokrzyskie region. The examined mines extract limestone from two different
 
 deposits of the same age. The rock samples are collected from beds lying at different depths, distinct
 
 in texture and color in macroscopic examination. It was found that despite the changes in bulk density,
 
 porosity and absorption, all the examined samples were frost resistant.
 
 Using the Differential Analysis of Volumetric Strain method, the content of ice formed in the pore
 
 spaces was determined. In addition, the ratio of the content of water capable of freezing to the total
 
 pore volume, and the total amount of water absorbed due to capillary action in rock samples soaked
 
 in water, were analyzed. In all cases, it was revealed that the destructive action of freezing water was
 
 weakened due to a relatively low content of water capable of freezing and a substantial volume of
 
 pores that are not filled with water in capillary absorption.
 
 It is extremely important to be able to classify the available rock material. The generally adopted
 
 methods, including absorptivity tests, do not allow for precise categorization. In the investigations,

the authors focused on the analysis of the basic factors that are decisive for rock durability, including bulk density, pore filling level and volume absorption. The authors do not correspond compressive

strength and resistance to abrasion as this will be the subject of further research.

 
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Authors and Affiliations

Karol Skowera
Zbigniew Rusin

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