sodium carbonate activated slag as cement replacement in

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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 activated slag was investigated as an alternative binder to cement to design autoclaved aerated concrete, with the aim to evaluate the methodology and the general principle of a cement ...

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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 accelerator in producing AAC [4] and slag as quartz replacement in the patent of Eriksson [41]. In this study, sodium carbonate activated slag

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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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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 cement. • Materials made with sodium carbonate activated slag exhibited good properties. • Sodium carbonate is more eco-friendly compared to sodium silicate/hydroxide.

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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 ...

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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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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(PDF) Chemical acceleration of a neutral granulated blast ...

This paper presents results of a study on chemical acceleration of a neutral granulated blast-furnace slag activated using sodium carbonate. As strength development of alkali-activated slag cements containing neutral GBFS and sodium carbonate as

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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 various additives on the early age ...

The use of sodium carbonate as an alkali activator for slag to produce alkali-activated slag is promising due to its sustainable, economic and user-friendly properties. However, the lower early age performance of composites made with such binder has limited its use especially in applications where higher early age is required. Hence, in order to propel the application of this sustainable ...

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Performance of eco-friendly mortars made with alkali ...

Feb 08, 2021  The compressive strength of the mixture incorporating 50% glass powder as replacement of BFS and activated with a sodium carbonate-lime blend is 25.1% and 48.3% higher than that activated with only sodium carbonate at 7 and 28 days, respectively.

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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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Effect of limestone powder on mechanical strength ...

Mar 28, 2021  The use of limestone powder (LSP) as a cement replacement is used in abundant applications due to its low cost and wide availability. Adversely, the use of LSP as a part of the precursors of alkali-activated materials (AAMs) is still in the developing stage. This scarcity of studies opened the door and encouraged the researchers for more investigations. Thus, this paper studied the effect of ...

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Materials Free Full-Text Effects of Light-Burnt ...

This study investigates the potential of light-burnt dolomite (LBD) as a supplementary cementitious material with ground granulated blast furnace slag (GGBFS) and Ordinary Portland cement (OPC). In this work, LBD was substituted for up to 20% of GGBFS in sodium sulfate-activated slag systems. The effects of LBD incorporation on the flow, setting time, compressive and flexural strength ...

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Effect of Dosage of Alkaline Activator on the Properties ...

This study focused on the engineering properties of alkali-activated slag (AAS) pastes prepared by mixing an activator consisting of sodium silicate and sodium hydroxide at room temperature. The water-to-slag ratio of AAS paste was kept constant at 0.35 by mass. AAS pastes were prepared using the activator with five different silicate moduli of 1, 1.2, 1.4, 1.6, and 1.8 and three different Na ...

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PERFORMANCE OF ALKALI ACTIVATED SLAG WITH VARIOUS ALKALI ...

The performance of alkali-activated slag concrete with sodium silicate, sodium hydroxide, sodium carbonate as activator are used at 4% Na2O (by weight of slag) and 4% of hydrated lime by total weight of solid binder content if used as a retarder. The scope of the work covered four mixes: - Normal OPC mix and three alkali activated slag mixes of ...

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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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of Alkali-Activated Slag Concrete

The replacement of cement with alternative industrial by-products characterized with high ... sodium carbonate ... A Review of Durability and Strength Characteristics of Alkali-Activated Slag Concrete

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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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A Review of Durability and Strength Characteristics of ...

Alkali-activated slag (AAS) is a promising alternative to ordinary Portland cement (OPC) as sole binder for reinforced concrete structures. OPC is reportedly responsible for over 5% of the global CO 2 emission. In addition, slag is an industrial by-product that must be land-filled if not re-used.

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PERFORMANCE OF ALKALI ACTIVATED SLAG WITH VARIOUS ALKALI ...

The performance of alkali-activated slag concrete with sodium silicate, sodium hydroxide, sodium carbonate as activator are used at 4% Na2O (by weight of slag) and 4% of hydrated lime by total weight of solid binder content if used as a retarder. The scope of the work covered four mixes: - Normal OPC mix and three alkali activated slag mixes of ...

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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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Performance of eco-friendly mortars made with alkali ...

One of the effective and sustainable ways to enhance the early age strength of sodium carbonate activated slag is by incorporation of various additives as partial replacement of sodium carbonate ...

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Waste glass as binder in alkali activated slag–fly ash ...

Oct 03, 2019  In previous studies, waste glass was also used as ingredient, combining with GGBS or fly ash for the alkali activated concrete production, such as a binder, or even activator to replace water glass [20,21,22,23]. Sodium hydroxide, water glass and sodium carbonate are commonly applied as activators in alkali activated concrete production.

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Effect of Dosage of Alkaline Activator on the Properties ...

This study focused on the engineering properties of alkali-activated slag (AAS) pastes prepared by mixing an activator consisting of sodium silicate and sodium hydroxide at room temperature. The water-to-slag ratio of AAS paste was kept constant at 0.35 by mass. AAS pastes were prepared using the activator with five different silicate moduli of 1, 1.2, 1.4, 1.6, and 1.8 and three different Na ...

Get price

Influence of various additives on the early age ...

The use of sodium carbonate as an alkali activator for slag to produce alkali-activated slag is promising due to its sustainable, economic and user-friendly properties. However, the lower early age performance of composites made with such binder has limited its use especially in applications where higher early age is required. Hence, in order to propel the application of this sustainable ...

Get price

Materials Free Full-Text Effects of Light-Burnt ...

This study investigates the potential of light-burnt dolomite (LBD) as a supplementary cementitious material with ground granulated blast furnace slag (GGBFS) and Ordinary Portland cement (OPC). In this work, LBD was substituted for up to 20% of GGBFS in sodium sulfate-activated slag systems. The effects of LBD incorporation on the flow, setting time, compressive and flexural strength ...

Get price

A Review of Durability and Strength Characteristics of ...

Apr 12, 2019  Alkali-activated slag (AAS) is a promising alternative to ordinary Portland cement (OPC) as sole binder for reinforced concrete structures. OPC is reportedly responsible for over 5% of the global CO2 emission. In addition, slag is an industrial by-product that must be land-filled if not re-used.

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Mechanical and chemical analysis of one-part geopolymers ...

1 天前  Bands at around 1400 and 1350 cm-1 in the geopolymers can be attributed to sodium carbonate (Na 2 CO 3) formation due to the reaction of the alkali oxide (Na 2 O) with atmospheric CO 2 [, , ]. Small stretching vibration bands around 3700 – 3600 cm-1 related to O-H are noted in the MK spectrum, in Fig. 4 (a-c).

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CN110963722A - Method for producing active admixture by ...

A method for producing an active admixture by treating electrolytic manganese slag through an unhomogenization process comprises the following steps: (1) continuously feeding the electrolytic manganese slag into a kiln tail smoke chamber through an air locking feeding system; (2) the mineral conditioning powder is preheated by a preheater system and then is fed into a decomposing furnace,

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