Strength, ASR and chloride penetration of mortar with granite waste powder

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Ana Mafalda Matos (Author) FEUP; Telma Ramos (Author) FFUP; Joana Sousa Coutinho (Author) FEUP

Journal

Title: Key Engineering Materials

Vol. 634

Pages: 139-150

ISSN: 1013-9826

Publisher: Trans Tech Publications Ltd

Indexing

ISI Web of Knowledge

ISI Web of Science

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences

Other information

Authenticus ID: P-00A-5B4

DOI: 10.4028/www.scientific.net/KEM.634.139

Abstract (EN): Over the last decades, extensive research has been undertaken to minimize the use of Portland cement by increasing the amount of various supplementary cementing materials since currently global concrete production accounts for more than five percent of anthropogenic carbon dioxide emissions. The granite cutting industry produces large amounts of wastes. Managing large amounts of sludge can be rather problematic for its producers, which must find appropriate places for storage and deposition. The experimental program carried out involved characterization of granite dust from a quarry in the north of Portugal, including chemical analysis, scanning electron microscopy (SEM) and laser particle size analysis. Subsequently, mechanical and durability properties (alkali-silica reaction and resistance to penetration of chloride ions) were evaluated in mortar produced with different dosages of cement replacement, as well as, different levels of fineness of ground granite. It could be concluded that finely ground granite dust can originate a denser cement matrix and improve durability without compromising fresh behavior or strength.

Language: English

Type (Professor's evaluation): Scientific