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Feldspar and mica. Key minerals for fine aggregate quality

Willy, Danielsen Svein / Rueslåtten, Håkon G.

Abstract Research on the aggregate-concrete interaction has proved feldspar and mica to be key minerals for concrete quality. Feldspars are predominant minerals in most Norwegian aggregates. A relation has been found between the strength of cement mortars and the type and condition of the feldspars present. Especially, the degree of feldspar alteration (saussurite, sericite) appears to be a primary factor for mortar strength. Concerning mica, a dependence on the weathering conditions has been demonstrated, naturally occurring mica proving less harmful to concrete properties than mica in crushed aggregates. A geochemical interpretation of this includes changes in cation exchange capacity resulting from alteration and weathering.

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Feldspar and mica. Key minerals for fine aggregate quality

Willy, Danielsen Svein / Rueslåtten, Håkon G.

Abstract Research on the aggregate-concrete interaction has proved feldspar and mica to be key minerals for concrete quality. Feldspars are predominant minerals in most Norwegian aggregates. A relation has been found between the strength of cement mortars and the type and condition of the feldspars present. Especially, the degree of feldspar alteration (saussurite, sericite) appears to be a primary factor for mortar strength. Concerning mica, a dependence on the weathering conditions has been demonstrated, naturally occurring mica proving less harmful to concrete properties than mica in crushed aggregates. A geochemical interpretation of this includes changes in cation exchange capacity resulting from alteration and weathering.

Feldspar and mica. Key minerals for fine aggregate quality

Willy, Danielsen Svein / Rueslåtten, Håkon G.

Abstract Research on the aggregate-concrete interaction has proved feldspar and mica to be key minerals for concrete quality. Feldspars are predominant minerals in most Norwegian aggregates. A relation has been found between the strength of cement mortars and the type and condition of the feldspars present. Especially, the degree of feldspar alteration (saussurite, sericite) appears to be a primary factor for mortar strength. Concerning mica, a dependence on the weathering conditions has been demonstrated, naturally occurring mica proving less harmful to concrete properties than mica in crushed aggregates. A geochemical interpretation of this includes changes in cation exchange capacity resulting from alteration and weathering.

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Title:

Feldspar and mica. Key minerals for fine aggregate quality

Contributors:

Willy, Danielsen Svein (author) / Rueslåtten, Håkon G. (author)

Published in:

Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur ; 22

Publication date:

1980

ISSN:

DOI:

https://doi.org/10.1007/BF02600673

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Cement Mineral , Cement Mortar , Crushed Aggregate , Mortar Strength , Predominant Mineral

Classification:

BKL: 38.58 Geomechanik / 56.20 Ingenieurgeologie, Bodenmechanik
Local classification TIB: 050/6545

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