Results 191 to 200 of about 8,572 (229)
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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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Shrinkage mitigation strategies in alkali-activated slag
Cement and Concrete Research, 2017Abstract In this work, three shrinkage mitigation strategies (i.e. high-temperature curing, sulfate-enrichment, and calcium-enrichment) were evaluated and their effectiveness in mitigating shrinkage of alkali-activated slag (AAS) was studied. The results show that the cause of high-magnitude shrinkage in AAS is attributed to the high visco-elastic ...
Ye, Hailong, Radlińska, Aleksandra
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Kinetic study on hydration of alkali-activated slag
Cement and Concrete Research, 1993The mechanism and kinetics of hydration of alkali-activated slag (AAS) have been studied. Heat of hydration, non-evaporable water content and hydration degree of AAS were examined. Similar to ordinary Portland cement (OPC), the hydration process of AAS could be classified into five stages: initial, induction, acceleration, deceleration and decay, but ...
Zhou Huanhai +3 more
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A Review of Alkali-Activated Slag as Cement Replacement
Key Engineering Materials, 2019Alkali activated slag (AAS) offers opportunities to the construction industry as an alternative to ordinary Portland cement (OPC). The production of OPC and its use contributes significantly to release of CO2 into the atmosphere while AAS is an industrial by-product that contributes much less to the environmental footprint that needs to be recycled if ...
Osama Ahmed Mohamed, Maadoum M. Mustafa
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