Characterization, activation and reactivity – A case study of Nordic volcanic materials for application as Supplementary Cementitious Materials
Artikel i vetenskaplig tidskrift, 2025

Despite their historical importance, the widespread use of volcanic materials as Supplementary Cementitious Materials faces challenges. There exists a knowledge gap relating the properties such as chemical compositions, mineralogy, physical attributes (effective particle size distribution, and specific surface areas) with reactivity. The current study investigates the correlation between noted properties when physical properties are altered by mechanochemical treatments applied to four unique volcanic materials with diverse mineralogy including Albite, Anorthite, Andesine, Oligoclase and Olivine. The alterations in these properties are then linked to changes in the reactivity levels of volcanic materials. The key findings emphasize that grinding volcanic materials for up to 20 min can result in significant improvements. The following outlines the most notable changes observed from 5 min to 20 min: a decrease in D50 from 37 μm to 9 μm, an increase in surface area from 4 m2/g to 13 m2/g, and a rise in average degree of amorphization of the four volcanic materials from 70 % to 83 %. Progressive increases in reactivity levels were observed when extending the milling time from 5 to 20 min, with the most significant increase showing a change from 56 J/g to 350 J/g SCM, as measured with the MR3 reactivity test. X-ray diffraction analyses reveal the detection of new phases like Magnetite and Iron with prolonged mechanochemical activation, and the reaction of mineral phases over time, in MR3 mixes.

Reactivity

Specific surface areas

Size distribution

Volcanic material

Mechanochemical Activation

Mineralogy

Författare

Amrita Hazarika

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Liming Huang

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Sigurdur Erlingsson

Háskóli Íslands

Statens Väg- och Transportforskningsinstitut (VTI)

Klaartje De Weerdt

Norges teknisk-naturvitenskapelige universitet

Ingemar Löfgren

Thomas Concrete Group

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Sahar Iftikhar

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Arezou Baba Ahmadi

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Case Studies in Construction Materials

2214-5095 (ISSN)

Vol. 22 e04096

Ämneskategorier (SSIF 2011)

Geokemi

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1016/j.cscm.2024.e04096

Mer information

Senast uppdaterat

2025-01-10