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Sodium carbonate activated slag as cement replacement in

Sodium carbonate activated slag as cement replacement in

Sodium carbonate activated slag as cement replacement in ...

Jun 01, 2017  In fact, sodium carbonate was used as accelerator in producing AAC and slag as quartz replacement in the patent of Eriksson . In this study, sodium carbonate

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Sodium carbonate activated slag as cement replacement in ...

In this case, sodium carbonate activation is preferable for the production of AAC by totally substituting the cement. In fact, sodium carbonate was used as

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Sodium carbonate activated slag as cement replacement in ...

This paper aims to study the suitability of fully replacing cement by sodium carbonate activated slag in producing autoclaved aerated concrete (AAC). The

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Ultra-fine slag activated by sodium carbonate at ambient ...

Dec 20, 2020  In the present study, ultra-fine slag (D50 = 8.1 μm, 4.3 μm, and 3.1 μm) was activated by sodium carbonate (2%, 4%, and 6% Na 2 O-E) at ambient temperature, and

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Performance and sustainability overview of sodium ...

Mar 01, 2021  Sodium carbonate was used as an activator in alkali-activated slag systems. • Sodium carbonate activated slag can be used as an alternative to Portland

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Blast furnace slag-Mg(OH)2 cements activated by sodium ...

Blast furnace slag-Mg(OH)2 cements activated by sodium carbonate Sam A. Walling, Susan A. Bernal, Laura J. Gardner, Hajime Kinoshita and John L. Provis * The structural evolution of a sodium carbonate activated slag cement blended with varying quantities of Mg(OH) 2 was assessed. The main reaction products of these blended cements were a ...

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Ultra-fine slag activated by sodium carbonate at ambient ...

Dec 20, 2020  In the present study, ultra-fine slag (D50 = 8.1 μm, 4.3 μm, and 3.1 μm) was activated by sodium carbonate (2%, 4%, and 6% Na 2 O-E) at ambient temperature, and the main conclusions were drawn as follows. (1) Owing to the high reactivity of ultra-fine particles, slag was efficiently activated by NC at ambient temperature.

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Comparison of Three Plasticizers in Carbonate-Activated ...

Aug 01, 2017  Characteristics of a sodium carbonate-activated slag concrete in presence of different plasticizers are presented and discussed. Inclusion of a calcined clay in the activator system allows for a more rapid curing in a system that is known to cure slowly. Depending upon the plasticizer (lignosulfonate, polycarboxylate or naphthalene sulfonate ...

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Performance of Alkali Activated Slag and Alkali Activated ...

alternative materials are alkali-activated slag (AAS) and fly ash (FA), where alkali-activated slag and fly ash are used not as a partial replacement to cement but as a sole binder’s in the production of concrete. The durability performance of alkali-activated slag (AAS) concrete with Sodium Silicate,

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Influence of limestone powder on the reaction kinetics and ...

Jul 04, 2016  However, the role of LP may differ in sodium carbonate activated slag (AAM) with respect to the initial precipitated calcium carbonate sharing the same chemical composition to LP. By replacing the solid ingredient ground granulated blast furnace slag (GGBS) with LP at different levels (5%-30% by mass of slag), the reaction kinetics and ...

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(PDF) One-Part Geopolymer Cement from Slag and Pretreated ...

husk ash as cement replacement on concrete production. Construct. Build. Mater. 12 7, ... carbonates in the chemical evolution of sodium carbonate-activated slag. binders. Mater.

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Assessing the chemical involvement of limestone powder in ...

Feb 09, 2017  Figure 3 presents the heat evolution of sodium carbonate activated slag with different LP replacement levels. It is shown that the reaction process of SCAS incorporating LP is similar to that of PC hydration or other alkali activated materials [ 36 – 39

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Microstructure and Strength Development of Sodium ...

development in sodium carbonate activated slags as a function of the nature of the alkaline activator. The purpose was to explore the strength gain mechanism of sodium carbonate activated slag mixes at room temperature curing. To enhance both early and ultimate compressive strength, different accelerators were used.

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BEHAVIOUR OF MORTAR AND CONCRETE MADE WITH ACTIVATED BLAST ...

Activated blast furnace slag cement (ABFSC) was used as binder in mortar and concrete. A commercial pelletized slag, produced for use in the construction industry, was activated with sodium sulphate, sodium carbonate, or sodium silicate; and both normal curing and heat curing were used.

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Blast furnace slag-Mg(OH)(2) cements activated by sodium ...

Abstract. The structural evolution of a sodium carbonate activated slag cement blended with varying quantities of Mg(OH)2 was assessed. The main reaction products of these blended cements were a calcium-sodium aluminosilicate hydrate type gel, an Mg-Al layered double hydroxide with a hydrotalcite type structure, calcite, and a hydrous calcium aluminate phase (tentatively identified as a ...

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(PDF) Role of Natural Stone Wastes and Minerals in the ...

Yang et al. [30] prepared GBFS/calcined dolomite blends (2, 6, and 10 wt.% of the GBFS) for the preparation of one-part sodium carbonate activated pastes at different Na2 CO3 amounts (10 and 15 wt.%). A further key parameter in property development is curing, as it affects alkali activation reactions and material microstructure.

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CivilEng Free Full-Text The Effect of Reclaimed ...

The most used alkaline activators are sodium silicate, sodium hydroxide, sodium carbonate, potassium hydroxide and potassium silicate . The final activated product may present high strength, chemical resistance (acidic and sulphate environments), and comparable chloride ingress to OPC-based materials [

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Directoy of magnesite mineral manufacturers, exporters ...

China Metallurgical Imp. Exp. Liaoning Magnesite Co. [Anshan, China] Manufacturers and Exporters of magnesite raw materials, magnesite refractories, magnesite chemicals. Our product rangfe includes: 1 Raw Magnesite 2 Fused Magnesite 3 Ordinary Grade Dead Burned Magnesite 4 High Purity Dead Burned Magnesite 5 Caustic Calcined Magnesite 6 Caustic Calcined Magnesite Ball 7 Synthetic

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Sodium carbonate activated slag as cement replacement in ...

This paper aims to study the suitability of fully replacing cement by sodium carbonate activated slag in producing autoclaved aerated concrete (AAC). The material properties of the product are characterized in terms of green strength development, mechanical properties, pore related properties such as porosity and thermal conductivity, shrinkage ...

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Blast furnace slag-Mg(OH)2 cements activated by sodium ...

Jun 26, 2018  The structural evolution of a sodium carbonate activated slag cement blended with varying quantities of Mg(OH) 2 was assessed. The main reaction products of these blended cements were a calcium-sodium aluminosilicate hydrate type gel, an Mg-Al layered double hydroxide with a hydrotalcite type structure, calcite, and a hydrous calcium aluminate phase (tentatively identified as a carbonate ...

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Ultra-fine slag activated by sodium carbonate at ambient ...

Sodium carbonate-activated slag/fly ash (NC-SF) binders has recently evolved as a potentially more sustainable binding materials than both Portland cement and conventional alkali activated ...

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BEHAVIOUR OF MORTAR AND CONCRETE MADE WITH ACTIVATED BLAST ...

Activated blast furnace slag cement (ABFSC) was used as binder in mortar and concrete. A commercial pelletized slag, produced for use in the construction industry, was activated with sodium sulphate, sodium carbonate, or sodium silicate; and both normal curing and heat curing were used.

get price

(PDF) One-Part Geopolymer Cement from Slag and Pretreated ...

husk ash as cement replacement on concrete production. Construct. Build. Mater. 12 7, ... carbonates in the chemical evolution of sodium carbonate-activated slag. binders. Mater.

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Alkali-activated slag cements produced with a blended ...

An alkali-activated slag cement produced with a blend of sodium carbonate/sodium silicate activator was characterised. This binder hardened within 12h and achieved a compressive strength of 20MPa after 24h of curing under ambient conditions, which is associated with the formation of an aluminium substituted calcium silicate

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Chloride binding and mobility in sodium carbonate ...

of sodium carbonate-activated slag cement are not yet fully understood. The phase assemblages of AAS cements are mainly controlled by the chemistry of the slags and activators used [7, 15–18], and the microstructures and mechanical properties of AAS

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武汉理工大学材料科学与工程学院欢迎您

Sodium carbonate activated slag as cement replacement in autoclaved aerated concrete. Ceramics International, 43(8), 6039-6047. 8. Yuan, B., Yu, Q.L.* Brouwers, H.J.H. (2017). Autogenous and drying shrinkage of sodium carbonate activated slag altered by limestone powder incorporation. Construction and Building Materials, 153, 459-468.

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Effects of Alkali Activation and CO2 Curing on the ...

Jan 25, 2019  This work investigates the sequential application of alkali activation and CO 2 curing to BOF steel slag as a technique for improving its hydraulic reactivity for use in concrete, while also exploiting its potential as a carbon sink. Activation with either a sodium hydroxide/sodium-silicate or a sodium hydroxide/sodium carbonate solution was first evaluated in a preliminary calorimetric study ...

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Cementitious property of NaAlO2-activated Ge slag as ...

Dec 07, 2019  Germanium (Ge), a waste residue leaching from zinc (Zn) smelting process, has potential cementitious properties and could be recycled as a cement supplement activated by chemical reagents. In this work, a test was conducted to determine the hydration properties of Ge slag-cement-based composites with Ge slag (GS)/ordinary Portland cement (PC) contents of 0wt%, 5wt%, 10wt%,

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Influence of limestone powder on the reaction kinetics and ...

Jul 04, 2016  However, the role of LP may differ in sodium carbonate activated slag (AAM) with respect to the initial precipitated calcium carbonate sharing the same chemical composition to LP. By replacing the solid ingredient ground granulated blast furnace slag (GGBS) with LP at different levels (5%-30% by mass of slag), the reaction kinetics and ...

get price

Blast furnace slag-Mg(OH)(2) cements activated by sodium ...

Abstract. The structural evolution of a sodium carbonate activated slag cement blended with varying quantities of Mg(OH)2 was assessed. The main reaction products of these blended cements were a calcium-sodium aluminosilicate hydrate type gel, an Mg-Al layered double hydroxide with a hydrotalcite type structure, calcite, and a hydrous calcium aluminate phase (tentatively identified as a ...

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Alkali-activated slag cements produced with a blended ...

59 Sodium carbonate has been identified as a suitable possibility to achieve comparable pH in the pore 60 solution of alkali-activated slag to that identified in Portland cements (Bai et al., 2011), and is 61 significantly less expensive than most other possible activators. Sodium carbonate activation of

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Comparison of Effects of Sodium Bicarbonate and Sodium ...

Mar 28, 2019  Abdalqader A.F., Jin F., Al-Tabbaa A. Development of greener alkali-activated cement: Utilisation of sodium carbonate for activating slag and fly ash mixtures. J. Clean.

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