DBPapers
DOI: 10.5593/sgem2011/s02.115

ESTIMATING OF THE DURABILITY AND WEATHERING STATE OF ROCK MATERIALS USING CHEMICAL WEATHERING INDICES BASED ON CATION PACKING VALUE: A CASE STUDY

AUTHOR/S: S. CERYAN
Monday 1 August 2011 by Libadmin2011

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 1, 437-444 pp

ABSTRACT

Weathearability and/or the performance of the building stones in service are depend
heavily on mineralogical composition, fabric, especially micro-fissure properties, and
weathering state of rocks material. When considering the definition of the k-value, it is
possible to say that the k-value can be used for characterizing the weathering state and
weatherability of a rock.
As decomposition of a mineral result in the formation of new minerals with lower kvalue,
the k-value of whole rocks is generally regarded as a measure of the degree of
weathering. The difference between the k-value of fresh sample and the k-value of
weathered sample gives the amount of chemical leaching. k- leaching index exhibits
good correlations with both micro-fissure plus voids and the weathering indices
representing chemical leaching. The difference between the k-value of the whole sample
and the k-value of the unaltered parts of the same samples gives the amount to
weathering product. Therefore the ratio of the difference to k-value of the same sample
is defined as k-product index
These indices are applied on the selected weathering profiles in the Kurtun
Granodiorite, NE Turkey, for the estimation of the effects of petro-chemical properties
on the durability of the rock materials and weathering state. There are found the
statically meaningful relationships between the static and dynamic durability indicators
and these chemical weathering indices based on k-value. It is shown that k-leaching
index and k-products index, defined in this study can be used to evaluate the chemical
weatherability and weathered state of weathered rocks materials.

Keywords: k-value, chemical weathering indices, durability, rock durability indicator, granite, NE Turkey.

PAPER 2011/s02.115: ESTIMATING OF THE DURABILITY AND WEATHERING STATE OF ROCK MATERIALS USING CHEMICAL WEATHERING INDICES BASED ON CATION PACKING VALUE: A CASE STUDY

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