Effects of POFA replaced with FA on durability properties of GBFS included alkali activated mortars

Huseien, Ghasan Fahim; Tahir, Mahmood Md.; Mirza, Jahangir; Ismail, Mohammad; Shah, Kwok Wei; Asaad, Mohammad Ali

doi:10.1016/j.conbuildmat.2018.04.166

Cited by 89 publications

(30 citation statements)

References 40 publications

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“…By contrast, at 15-20% BGWNP, the MoE of the AAMs diminished from 13.8 to 13.6 GPa. The lower calcium content of AAMs with no more than 10% BGWNP was considered to be the reason for the reduction of not only MoE, but also of FS and STS [21]. GPa.…”

Section: Flexural Splitting Tensile Strength and Modulus Of Elasticitymentioning

confidence: 99%

“…The preparation of these materials is undertaken based on alkali activation and starting source materials with high levels of silicon, aluminium and calcium [13][14][15], such as meta-kaolin (MK), 2 of 21 fly ash (FA), palm oil fuel ash (POFA), GBFS and ceramic waste (WCP) [16][17][18]. Previous studies on AAMs revealed that these materials demonstrated a range of exceptional qualities, including short setting timespan, curing at room temperature [19], high early strength [20], low susceptibility to high temperatures, adequate durability in adverse conditions [21], reduced emissions of carbon dioxide, and low use of energy [22,23]. AAMs are usually produced with alkaline activator solutions like sodium hydroxide and sodium silicate, with conditions for ideal performance being high sodium hydroxide levels of 10-16 M and a high sodium silicate-sodium hydroxide ratio of 2.5 [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…A number of studies have been dedicated to the investigation of the qualities of FA-based AAMs. AAMs are a promising cementitious material because they are highly durable and their suitability for different construction applications is supported by their confirmed engineering characteristics [21,35,36]. However, at high curing temperatures between 40 and 85 • C, FA-based AAMs present some shortcomings, such as long a duration of setting and poor compressive strength.…”

Section: Introductionmentioning

confidence: 99%

“…Despite its considerable strength, alkali-activated GBFS has restricted applications due to setting too fast, being inadequately workable and having high drying shrinkage values. FA-based AAMs could be made stronger, more workable and their setting time improved, while solution demand can be decreased by enriching them with GBFS [21]. However, GBFS makes mortar less durable in the context of exposure to sulphuric acid and sulphate attacks, primarily due to the fact that it has high levels of calcium oxide.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

et al. 2020

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The recycling of millions of tons of glass bottle waste produced each year is far from optimal. In the present work, ground blast furnace slag (GBFS) was substituted in fly ash-based alkali-activated mortars (AAMs) for the purpose of preparing glass bottle waste nano-powder (BGWNP). The AAMs mixed with BGWNP were subsequently subjected to assessment in terms of their energy consumption, economic viability, and mechanical and chemical qualities. Besides affording AAMs better mechanical qualities and making them more durable, waste recycling was also observed to diminish the emissions of carbon dioxide. A more than 6% decrease in carbon dioxide emissions, an over 16% increase in compressive strength, better durability and lower water absorption were demonstrated by AAM consisting of 5% BGWNP as a GBFS substitute. By contrast, lower strength was exhibited by AAM comprising 10% BGWNP. The conclusion reached was that the AAMs produced with BGWNP attenuated the effects of global warming and thus were environmentally advantageous. This could mean that glass waste, inadequate for reuse in glass manufacturing, could be given a second life rather than being disposed of in landfills, which is significant as concrete remains the most commonplace synthetic material throughout the world.

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Section: Flexural Splitting Tensile Strength and Modulus Of Elasticitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

et al. 2020

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“…Alkali-activated mortar and concrete materials have shown a commendable mechanical performance and thus such production techniques have been considered as alternative processes for the production of construction materials despite the yet low acceptance by the industry. Aside fly ash (FA) and ground granulated blast furnace slag (GGBS) have been extensively studied in the production of AAM, and other potential precursors rich in amorphous Al 2 O 3 and SiO 2 include: Agricultural wastes and aquaculture farming ashes : rise husk ash [ 1 , 2 ], palm oil fuel ash [ 3 , 4 , 5 , 6 ], corn cob ash [ 7 , 8 ], sugarcane bagasse ash [ 9 ], straw ash [ 7 , 10 ], forest biomass bottom ash [ 11 ], wood ashes [ 12 , 13 ], other agriculture-farming wastes (e.g., alfalfa steam ash, cotton gin ash, com stalk ash and switch grass ash [ 7 , 14 , 15 ]), and shell wastes [ 16 , 17 ]; Industrial waste ashes : FA [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ], coal bottom ash [ 28 ], industrials slags [ 3 , 20 , 29 , 30 , 31 , 32 , 33 , 34 ], silica fume [ 35 , …”

Section: Introductionmentioning

confidence: 99%

Incorporation of Alkali-Activated Municipal Solid Waste Incinerator Bottom Ash in Mortar and Concrete: A Critical Review

Kurda

2020

Materials

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In the light of one of the most common waste management issues in urban areas, namely the elimination of municipal solid waste (MSW; about 486 kg of the waste per capita were generated in the EU in 2017), this study discusses one technique as an outlet in the construction industry for the by-product of the waste’s incineration in energy recovery facilities (i.e., MSW incinerator bottom ash—MIBA). There have been some investigations on the use of MIBA as partial replacement of cement to be used in cementitious composites, such as concrete and mortars. However, the waste’s incorporation ratio is limited since further products of hydration may not be produced after a given replacement level and can lead to an unsustainable decline in performance. In order to maximize the incorporation of MIBA, some research studies have been conducted on the alkali activation of the waste as precursor. Thus, this study presents an extensive literature review of the most relevant investigations on the matter to understand the material’s applicability in construction. It analyses the performance of the alkali-activated MIBA as paste, mortar, and concrete from different perspectives. This literature review was made using search engines of several databases. In each database, the same search options were repeated using combinations of various representative keywords. Furthermore, several boundaries were made to find the most relevant studies for further inspection. The main findings of this review have shown that the chemical composition and reactivity of MIBA vary considerably, which may compromise performance comparison, standardization and commercialization. There are several factors that affect the performance of the material that need to be considered, e.g., type and content of precursor, alkaline activator, curing temperature and time, liquid to solid ratio, among others. MIBA-based alkali-activated materials (AAM) can be produced with a very wide range of compressive strength (0.3–160 MPa). The main factor affecting the performance of this precursor is the existence of metallic aluminum (Al), which leads to damaging expansive reactions and an increase in porosity due to hydrogen gas generation stemming from the reaction with the alkaline activator. Several approaches have been proposed to eliminate this issue. The most effective solution was found to be the removal of Al by means of eddy current electromagnetic separation.

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The Capacity of Alkali‐Activated Industrial Wastes in Novel Sustainable Ceramic Membranes

Shiwa,

Khosravi,

Mohammadi

et al. 2024

ChemBioEng Reviews

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Novel ceramic membranes present unquestionable potential in wastewater treatment among the emerging technologies, while a few challenges such as cost, energy consumption, durability, and resistance in harsh mediums still limit their commercialization. Here, we review the capability of available industrial aluminosilicate waste materials in the fabrication of novel ceramic membranes using green and economical alkali‐activation synthesis method. The different sources of alkali‐activated aluminosilicate wastes including ashes, mining wastes, glass and ceramic wastes, slags, construction wastes, industrial byproducts, and agricultural wastes are introduced and the chemistry of geopolymers is reviewed. In this review, the major points are the following. 1) The alkali‐activated structures present reasonable chemical, frost, carbonation, and mechanical resistance as well as the ability to immobilize the toxic materials. 2) The synthesis aspects of porous and nonporous alkali‐activated ceramic membranes are explored by characterization methods. Furthermore, the durability analysis in harsh environments reveals that alkali‐activated ceramic membranes possess high resistance against acidic, alkaline, and other antifouling chemical washing methods. In summary, it is demonstrated that the studied membranes have an undeniable capability in the separation of organic solvents in the pervaporation process as well as toxic material removal from water with high ion‐exchange capacity.

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Effects of POFA replaced with FA on durability properties of GBFS included alkali activated mortars

Cited by 89 publications

References 40 publications

Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

Incorporation of Alkali-Activated Municipal Solid Waste Incinerator Bottom Ash in Mortar and Concrete: A Critical Review

The Capacity of Alkali‐Activated Industrial Wastes in Novel Sustainable Ceramic Membranes

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