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Decalcification resistance of alkali-activated slag
Journal of Hazardous Materials, 2012This paper analyses the effects of decalcification in concentrated 6M NH(4)NO(3) solution on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/A-S 42.5 N) was used as a benchmark material. Decalcification process led to a decrease in strength, both in AAS and in CEM II, and this effect was more ...
Miroslav M, Komljenović +3 more
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Alkali Activated Slag And Portland/Slag Ultrafine Cement
MRS Proceedings, 1989AbstractUltrafine Alkali Activated Slag (AAS) and Portland/Slag (P/S) cements have been commercially available in the United States for 2 and 5 years, respectively. Ultrafine cements have been the subject of research at Northwestern University for 6 years.Particle size of the ultrafine slag cement is characterized by 98% passing at 7 microns and a D50 ...
William J. Clarke, Maan Helal
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Solidification of nitrate solutions with alkali-activated slag and slag–metakaolin cements
Journal of Nuclear Materials, 2015© 2014 Elsevier B.V. All rights reserved. The solidification of nitrate solutions with alkali-activated slag (AASC) and slag-metakaolin cements (AASMC) and the resulting setting times, compressive strengths, dimensional stability, water resistance, hydration products, microstructures, and macroporous network structures were evaluated. The influences of
Rakhimova N. +6 more
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Alkali activation of Australian slag cements
Cement and Concrete Research, 1999Abstract Investigation of alkali activation of Australian slag (AAS) was carried out using sodium silicate, sodium hydroxide, sodium carbonate, sodium phosphate, and combinations of these activators. Compressive strengths in the range from 20 to 40 MPa were achieved for the pastes. The most effective activator was liquid sodium silicate.
Tatiana Bakharev +2 more
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Composite foamed alkali-activated concrete with slag and steel slag
Magazine of Concrete Research, 2020Thermally expandable foaming microspheres (FMS) are used as a foaming agent in many different fields due to their excellent dimensional stability and elastic properties. In this study, lightweight thermal insulation materials were prepared by adding FMS to foamed concrete containing alkali-activated steel slag and blast-furnace slag.
Lu Zeng +5 more
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The influence of steel slag and ferronickel slag on the properties of alkali-activated slag mortar
Construction and Building Materials, 2019Abstract With the continuous development of industry, a huge amount of industrial wastes have been produced and caused severe environmental problems. In order to reduce the issue caused by industrial waste, in this investigation, 50 wt% ground granulated blast furnace slag (GGBS) replaced by steel slag (SS) or ferronickel slag (FNS) was used to ...
Nanqiao You +5 more
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Immobilization of mercury and zinc in an alkali-activated slag matrix
Journal of Hazardous Materials, 2003The behavior of heavy metals mercury and zinc immobilized in an alkali-activated slag (AAS) matrix has been evaluated using physical property tests, pore structure analysis and XRD, TG-DTG, FTIR and TCLP analysis. Low concentrations (0.5%) of mercury and zinc ions had only a slight affect on compressive strength, pore structure and hydration of AAS ...
Guangren, Qian +2 more
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Effect of Metakaolinite on Properties of Alkali Activated Slag Materials
Key Engineering Materials, 2018Metakaolinite was introduced to alkali activated slag mortars and pastes. Properties of fresh and hardened mortars as well as phase composition and microstructure of hardened pastes were investigated. Introduction of metakaolinite both as addition as well as substitution of slag results in severe decrease in strength of the mortars.
Łukasz Kotwica +6 more
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Effect of the inherent alkalis of alkali activated slag on the risk of alkali silica reaction
Cement and Concrete Research, 2017Abstract Alkali silica reaction (ASR) occurred in the alkali activated slag (AAS) concrete was evaluated by a revised mortar prism method. The mortars were made of blast furnace slags activated by alkali silicate solution possessing different modulus (0.5, 0.75, 1 and 2) as well as cations (sodium and potassium) and standard sand with a volume ...
Ricarda Tänzer, Yu Jin, Dietmar Stephan
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Comparison of alkali–silica reactions in alkali-activated slag and Portland cement mortars
Materials and Structures, 2015Alkali–silica reactions (ASR) in alkali-activated slag (AAS) and Portland cement (PC) mortars were studied to compare their expansions and products. ASR expansions were measured following ASTM C1260 with modified curing and exposure conditions. Scanning electron microscope equipped with an energy-dispersive X-ray analyzer (SEM/EDX) was used to ...
Shi, Zhenguo +3 more
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