Effect of immersion in water partially alkali-activated materials obtained of tungsten mine waste mud

2012 ◽  
Vol 35 ◽  
pp. 117-124 ◽  
Author(s):  
Isabel Silva ◽  
João P. Castro-Gomes ◽  
António Albuquerque
Keyword(s):  
Mine Waste ◽  
Tungsten Mine ◽  
Alkali Activated

Durability and Environmental Performance of Alkali-Activated Tungsten Mine Waste Mud Mortars

2010 ◽  
Vol 22 (9) ◽  
pp. 897-904 ◽  
Author(s):  
Pacheco-Torgal Fernando ◽  
Castro-Gomes João ◽  
Jalali Said
Keyword(s):  
Environmental Performance ◽  
Mine Waste ◽  
Tungsten Mine ◽  
Alkali Activated

scholarly journals Properties of tungsten mine waste geopolymeric binder

2008 ◽  
Vol 22 (6) ◽  
pp. 1201-1211 ◽  
Author(s):  
Fernando Pacheco-Torgal ◽  
João Castro-Gomes ◽  
Said Jalali
Keyword(s):  
Mine Waste ◽  
Tungsten Mine

Utilization of tailings from tungsten mine waste as a substitution material for cement

2009 ◽  
Vol 23 (7) ◽  
pp. 2481-2486 ◽  
Author(s):  
Yun Wang Choi ◽  
Yong Jic Kim ◽  
Ook Choi ◽  
Kwang Myong Lee ◽  
Mohamed Lachemi
Keyword(s):  
Mine Waste ◽  
Tungsten Mine

scholarly journals Resistance to acid attack, abrasion and leaching behavior of alkali-activated mine waste binders

2010 ◽  
Vol 44 (2) ◽  
pp. 487-498 ◽  
Author(s):  
Pacheco-Torgal Fernando ◽  
Jalali Said
Keyword(s):  
Mine Waste ◽  
Acid Attack ◽  
Leaching Behavior ◽  
Alkali Activated

scholarly journals Design of alkali-activated materials for a modular green wall and green roof system

2019 ◽  
Vol 274 ◽  
pp. 04001
Author(s):  
Maria Manso ◽  
João Castro-Gomes
Keyword(s):  
Compressive Strength ◽  
Mine Waste ◽  
Green Roof ◽  
Strength Loss ◽  
Capillary Absorption ◽  
Green Wall ◽  
Roof System ◽  
Density Reduction ◽  
Alkali Activated ◽  
Reference Mixture

This study presents the work developed with alkali activated mixtures to be used as component of a new modular green wall and green roof system (GEOGREEN). The aim is to find the most appropriate composition of alkali-activated mixture to maximize water absorption and porosity and also find a good mechanical strength with reduced density. Alkali-activated mixtures were produced using two precursors, mine waste mud from Panasqueira mine (W) and ground waste glass (G) and two alkaline activators, sodium silicate (SS) and sodium hydroxide (SH). A ventilated oven was used to speed up the curing process. Variables as percentage substitution of W per G, molar concentration of SH, cure length and temperature, were tested to identify the reference mixture. After these tests different percentages of aggregates as sand (S), expanded cork granules (C) and expanded clay (A) were added to reference mixture (REF). Results indicate that S25 obtained the maximum compressive strength of 35 MPa after 7 curing days. However, about 30% compressive strength loss is observed after immersion of this mixture in water for 24h. Capillary absorption coefficient can reach to 4,77 kg/m2.h0,5 with C25 and to 4,11 kg/m2.h0,5 with S25. Also C50 enables a 20% density reduction compared to REF.

scholarly journals Compressive strength of tungsten mine waste- and metakaolin-based geopolymers

2014 ◽  
Vol 40 (4) ◽  
pp. 6053-6062 ◽  
Author(s):  
Ali Nazari ◽  
F. Pacheco Torgal ◽  
A. Cevik ◽  
J.G. Sanjayan
Keyword(s):  
Compressive Strength ◽  
Mine Waste ◽  
Tungsten Mine

scholarly journals Investigations of tungsten mine waste geopolymeric binder: Strength and microstructure

2008 ◽  
Vol 22 (11) ◽  
pp. 2212-2219 ◽  
Author(s):  
Fernando Pacheco-Torgal ◽  
J.P. Castro-Gomes ◽  
Said Jalali
Keyword(s):  
Mine Waste ◽  
Tungsten Mine

scholarly journals Investigations on mix design of tungsten mine waste geopolymeric binder

2008 ◽  
Vol 22 (9) ◽  
pp. 1939-1949 ◽  
Author(s):  
Fernando Pacheco-Torgal ◽  
J.P. Castro-Gomes ◽  
Said Jalali
Keyword(s):  
Mine Waste ◽  
Mix Design ◽  
Tungsten Mine

scholarly journals Tungsten mine waste geopolymeric binder: Preliminary hydration products investigations

2009 ◽  
Vol 23 (1) ◽  
pp. 200-209 ◽  
Author(s):  
Fernando Pacheco-Torgal ◽  
João Castro-Gomes ◽  
Said Jalali
Keyword(s):  
Mine Waste ◽  
Hydration Products ◽  
Tungsten Mine
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