CALL US

+86 17838360708

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 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 ...

get price

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

get price

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 ...

get price

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 ...

get price

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.

get price

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 ...

get price

Sodium carbonate activated slag as cement replacement in ...

Sodium carbonate activated slag as cement replacement in autoclaved aerated concrete . By B Bo Yuan, Chris Chris Straub, S Sven Segers, Q Qingliang Yu and HJH (Jos) Jos Brouwers. Abstract. This paper aims to study the suitability of fully replacing cement by sodium carbonate activated slag in producing autoclaved aerated concrete (AAC). The ...

get price

Sodium hydroxide substitution in slag activating mixes: A ...

Alkali-activated slag is commonly used as a cement substitute to reduce the environmental footprint of construction materials. Nonetheless, the use of significant amount of alkaline activators, such as sodium silicate or sodium hydroxide, can be detrimental in terms of global warming potential impact.

get price

Mechanical Properties of Na2CO3-Activated High-Volume ...

Jun 25, 2018  Abstract. The use of Na 2 CO 3 to improve the mechanical properties of high-volume slag cement (HVSC) is experimentally investigated in this study. Ordinary Portland cement (OPC) was replaced with 50, 60, 70, 80, and 90% ground-granulated blast-furnace slag (GGBFS) by weight.

get price

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

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 ...

get price

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 ...

get price

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,

get price

(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

get price

of Alkali-Activated Slag Concrete - MDPI

higher pH. Compared to OPC concrete, alkali-activated slag (AAS) concrete o ers several advantages including high and rapid strength development, and resistance to chemical attacks [6]. Slag can be activated using various alkaline compounds such as sodium hydroxide (NaOH), sodium carbonate

get price

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.

get price

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.

get price

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.

get price

High volume limestone alkali-activated cement developed by ...

Abstract Herein, we report on the development of a cement comprising ground granulated blast furnace slag, soda ash (sodium carbonate), and up to 68 wt.% granular limestone. Mixture Design of Experiment (DOE) was utilized, with analysis of compressive strength, modulus of elasticity, hydraulic properties, cost, CO2 production, and energy consumption. Models were derived to understand the ...

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

Sodium carbonate activated slag as cement replacement in ...

Sodium carbonate activated slag as cement replacement in autoclaved aerated concrete . By B Bo Yuan, Chris Chris Straub, S Sven Segers, Q Qingliang Yu and HJH (Jos) Jos Brouwers. Abstract. This paper aims to study the suitability of fully replacing cement by sodium carbonate activated slag in producing autoclaved aerated concrete (AAC). The ...

get price

Sodium hydroxide substitution in slag activating mixes: A ...

Alkali-activated slag is commonly used as a cement substitute to reduce the environmental footprint of construction materials. Nonetheless, the use of significant amount of alkaline activators, such as sodium silicate or sodium hydroxide, can be detrimental in terms of global warming potential impact.

get price

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

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 ...

get price

of Alkali-Activated Slag Concrete - MDPI

higher pH. Compared to OPC concrete, alkali-activated slag (AAS) concrete o ers several advantages including high and rapid strength development, and resistance to chemical attacks [6]. Slag can be activated using various alkaline compounds such as sodium hydroxide (NaOH), sodium carbonate

get price

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 ...

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

Properties of Alkali Activated Slag Concrete Incorporating ...

Alkali activated slag (AAS) has gained huge attention in recent years due to its ability to replace ordinary Portland cement (OPC) as a binder in concrete. A need to replace OPC is imminent due to the high carbon dioxide emitted into the environment during its production. However, the use of this type of binder did not eliminate the huge strain placed on the deposit of natural resources.

get price

(PDF) Chemo-mechanical properties of alkali-activated slag ...

Apr 23, 2021  Y uan et al. [34] claimed that limestone powder intensifies reaction in sodium carbonate activated 51 slag syste m, the compressive strength of the paste mixtures is slightly reduced and the ...

get price

ALKALI ACTIVATED MATERIALS: REVIEW OF CURRENT

slag as aluminosilicate precursors, and activated with sodium silicate [14, 15]. Formation of gel that is rich in silica has been attributed to the high shrinkage in slag activated with sodium silicate [16, 17]. As the rich silica gel loses moisture during drying, it causes microcracks within the AAS paste.

get price

Development of greener alkali-activated cement ...

Alkali activated fly ash/slag (AAFS), a newly evolved type of alkali-activated cements (AACs), is here studied with the aim of developing a more sustainable alternative to Portland cement (PC), known for its adverse environmental impact. In this study, sodium carbonate (Na2CO3) was used as the alkali activator for the fly ash (FA)/slag blends.

get price

Layered double hydroxides modify the reaction of sodium ...

Jun 02, 2019  Therefore, the uptake of dissolved carbonate ions by CLDH, which is the process by which this additive accelerates the kinetics of reaction in sodium carbonate-activated slag,17 cannot take place in an AAS system. This might also suggest that for AAS cement, the addition of HT could have a similar effect as that of the thermally treated HT (CLDH).

get price

Alkali-Activated and Geopolymer Cements

Accelerating carbonate activation •In an Na 2 CO 3-activated binder system, slags containing higher levels of MgO react much more rapidly •Incorporation of 10 wt.% CLDH in sodium carbonate activated slag pastes accelerates the reaction, enabling setting within 24 hours. Adding calcined layered double hydroxide (CLDH) (hydrotalcite, 500oC)

get price

Assessing the chemical involvement of limestone powder

carbonate significantly control the sodium carbonate activation process. According to the previous researches [4, 23, 28–30], the main reaction products of sodium carbonate activated slag are C–(A)–S–H gel, calcium carbonate (CaCO 3), gaylussite (Na 2-Ca(CO 3) 2 10H 2O), hydrotalcite (Mg 6Al 2CO 3(OH) 16-4H 2O), etc. With respect to ...

get price