Activation of mixtures of natural clay and glass cullet rejects
authors Carvalho, J; Carvalho, P; Pinto, AT; Labrincha, JA
nationality International
journal CLAY MINERALS
author keywords common clays; glass cullet rejects; alkaline activation; metakaolin; pozzolanic activity; green concrete; geopolymers; fireproof building materials
keywords F FLY-ASH; GEOPOLYMERIC MATERIALS; ALKALINE ACTIVATION; TEMPERATURE; MINERALS; MICROSTRUCTURE; PRODUCTS
abstract Alkaline activation involves a reaction between aluminium silicates and compounds with alkalis or alkaline-earth elements in a caustic environment and under certain thermal and pressure conditions. It has been used in the production of non-structural building materials and in so-called 'green' concrete, as products display high mechanical strength, low chemical reactivity and high resistance to fire. Green concrete could be an eco-efficient alternative to concrete made using ordinary Portland cement (OPC), reducing CO(2) emissions substantially. The main goal of this work is to test common clays, glass cullet and other industrial wastes as an alternative to the commonly used binders (metakaolin or fly ash) in geopolymers. Optimized formulations show interesting mechanical strength (approaching 20 MPa) after just 48 h of curing. The addition of F-sand as aggregate minimizes the shrinkage upon curing and the amount of activator required, and increases the density/degree of compaction of the bodies, thus improving their mechanical resistance within certain limits. Curing in ambient conditions also has a beneficial affect on the mechanical strength.
publisher MINERALOGICAL SOC
issn 0009-8558
year published 2008
volume 43
issue 4
beginning page 657
ending page 667
web of science category Chemistry, Physical; Geosciences, Multidisciplinary; Mineralogy
subject category Chemistry; Geology; Mineralogy
unique article identifier WOS:000264732400011
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 1.361
5 year journal impact factor 1.838
category normalized journal impact factor percentile 22.356
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg