Published: 2023-09-30

Petrographic assessment of the occurrence of potentially alkali-reactive silica in post-glacial gravels of North-Western Poland and North-Eastern Germany

Andrzej K. Dubiniewicz

Abstract

The paper presents the results of petrographic assessment of the occurrence of potentially alkali-reactive silica in gravels from post-glacial deposits located in north-western Poland and north-eastern Germany. The petrographic examination consisted in identifying alkali-reactive minerals and determining the form of their occurrence and content. The post-glacial gravels, which have a varied petrographic composition, are dominated by fragments of crystalline rocks. There are also fragments of lime- stones and sandstones, as well as lesser quantities of siliceous rocks and opal. Gravel grains contain various forms of reactive silica – opal, chalcedony, cryptocrystalline and microcrystalline quartz and strained quartz. Mineral components of the rocks displayed traces of secondary processes, mainly plagioclase kaolinitization and biotite chloritization. The post-glacial gravels were classified as potentially reactive according to the RILEM AAR-1 document. The conducted research confirmed that the petrographic examination is a method that allows one to quickly determine the presence of harmful components, however, when testing aggregates for alkali-reactivity, it should be used in conjunction with other methods.

Keywords:

alkali-reactivity, petrographic examination, post-glacial gravels, reactive minerals, silica, secondary processes.

Similar Articles

<< < 5 6 7 8 9 10 11 > >> 

You may also start an advanced similarity search for this article.

Download files

PDF

Citation rules

Dubiniewicz, A. K. (2023). Petrographic assessment of the occurrence of potentially alkali-reactive silica in post-glacial gravels of North-Western Poland and North-Eastern Germany. Roads and Bridges - Drogi I Mosty, 22(3), 259–273. https://doi.org/10.7409/rabdim.023.013

Cited by / Share

Licence


This website uses cookies for proper operation, in order to use the portal fully you must accept cookies.