04/04/2015 · This paper investigated the stabilization efficacy of alkaliactivated groundgranulated blast furnace slag (GGBS) for a marine soft clay, compared with that of portland cement (PC). The influence of activators, including NaOH, Na 2 CO 3, carbide slag (CS), NaOHCS, Na 2 CO 3CS, and Na 2 SO 4CS, on the stabilization efficacy was investigated ...
The environmental effects of production of Portland cement (PC) have provoked to examine the growth of concrete with replacement of cement with industrial byproducts containing high amount of Si and Al, which are activated by alkali solutions termed as geopolymer concrete. Concrete made with PC can be durable under mild exposure condition when properly designed whereas undergo ...
02/04/2007 · The composition of solid and liquid phases of alkaliactivated slag systems was investigated by thermodynamic modelling. The calculations predict the formation of C(–A)–S–H, stratlingite and hydrotalcite in different alkaliactivated slag systems, which agrees well with experimental findings.
The alkaliactivated material in the steel slaggranulated blast furnace slag system (abbreviated as alkaliactivated steel slagslag material) was selected in this paper to study the effects of the nano SiO 2 on the matrix compaction and efflorescence inhibition so as to enhance the advantages of the alkaliactivated materials and
The present study investigates the role of MgO in local structural changes occurring during the accelerated carbonation of alkaliactivated slag (AAS) using synchrotron Xray diffraction, mercury intrusion porosimetry, thermogravimetry, and nuclear magnetic resonance spectroscopy. The obtained results provid
1988 (English) Report (Refereed) Place, publisher, year, edition, pages Cement och betonginstitutet, 1988., p. 104 Series CBI forskning, ISSN ; 88:1
Twenty mixes were prepared with the ground granulated blast furnace slag (GGBFS) activated with the various alkali concentrations and sodium silie modulus. The compressive strength at the ages of 7, 28 and 90 days was measured and the drying shrinkage of the concrete samples up to 400 days were measured.
01/04/2007 · Alkaliactivated slag belongs to prospective materials in the field of fire protection because it exhibits remarkable hightemperature resistance. In this article, specific heat capacity, thermal diffusivity, and thermal conductivity of an alkaliactivated slag with sand aggregates are studied as functions of temperature up to 1200 ° C.
20/01/2020 · The alkaliactivated slag binder can be used for the production of fireresistant coatings due to its thermal shrinkage properties. References. 1. Carosio, F., Cuttica, F., Medina, L. Berglund ...
Alkaliactivated concrete mixes with ground granulated blast furnace slag and paper sludge ash in seawater environments Mengasini, L., Mavroulidou, M. and Gunn, M. (2021). Alkaliactivated concrete mixes with ground granulated blast furnace slag and paper sludge ash in seawater environments.
27/07/1995 · This paper summarizes the advantageous and disadvantageous properties of alkaliactivated slag cement and concrete by reviewing previously published work in English, Russian and Chinese. Practical problems and theoretical questions are discussed. Topics for future work in this field are suggested. The practical problems mentioned are quick setting, the possibility .
So far, the alkali activated concrete has primarily focused on the effect of source material properties and ratio of mix proportions on the compressive strength development. A little research has focused on developing a standard mix design procedure for alkali activated concrete for a range of compressive strength grades. This study developed a standard mix design procedure for alkali ...
Rapid setting time of alkaliactivated slag cement mixes and a quick loss of slump if the mix is not in motion is a known issue (Wang et al., 1994). The use of Ca(OH) 2 was suggested to lengthen the setting time of alkaliactivated slag cement mixes ( Douglas et al., 1991 ); this was observed for KOH mixes with PSA.
alkali activated slag, which has a long history in northern Europe, Scandinavia, and the Soviet Union [51]. Alkali activation of slag produces primarily calcium silie hydrates (C–S–H) similar to those found in OPC, distinct from the zeolitelike ionbalanced structure of geopolymers [44]. Although alkali activated slags have been ...
Alkaliactivated blast furnace slag cements have been studied since the 1930s due to its high compressive strength, they can exceed 100 MPa in 28 days. The low Ca/Si ratio in slag improves its resistance to aggressive chemical materials such as acids, chlorides and sulphates [3,4,5]. Blast furnace slag is a highly
In an alkaliactivated high calcium system, for example, blast furnace slag as the raw material, the reaction product is a twodimensional calcium silie hydrate with a certain degree of Alparticipation, also known as C–A–S–H gel. In an alkaliactivated fly ash/slag (AAFS) blended system, the main reaction product is a coexistence of
Authors: E. Petrakis, V. Karmali, K. Komnitsas Abstract: In this study grinding experiments were performed in a laboratory ball mill using Polish ferronickel slag in order to study the effect of the particle size on alkali activation and the properties of the produced alkali activated materials (AAMs).
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