Towards greener one-part geopolymers through solid sodium activators modification

Wan-En, Ooi; Yun-Ming, Liew; Cheng-Yong, Heah; Ho, Li-Ngee; Abdullah, Mohd Mustafa Al Bakri; Khalid, Mohd Suhaimi; Foo, Kai Loong; Shee-Ween, Ong; Tan, Pei Seng; Yong-Jie, Hang; Zulkifly, Khairunnisa

doi:10.1016/j.jclepro.2022.134370

Cited by 18 publications

(3 citation statements)

References 51 publications

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“…Almeshal et al [68] obtained a relationship between the compressive and flexural strengths of convectional concrete containing waste plastic aggregate from the data gathered from various studies performed by different authors, as shown in Equation (7). f = 0.62λ 0.5 c (5) f = 0.30 0.667 c (6) t = 0.09 0.97 c (7) where λ = is a modification factor, λ for normal and lightweight concrete = 1, and f = flexural strength (MPa).…”

Section: Relation Between Compressive Flexural and Splitting Tensile ...mentioning

confidence: 99%

“…The production of 1 kg of PC produces almost an equivalent quantity (0.8-0.9 kg) of CO 2 [2][3][4]. Additional studies have determined that PC manufacturing accounts for approximately 7% of the worldwide CO 2 emissions [5][6][7]. Furthermore, an estimated 1.45 ± 0.20 gigatonnes (Gt) of global CO 2 emissions were attributed to cement production in 2016, according to Andrew [8].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Waste Plastic and Glass Aggregates on the Strength Properties of Ambient-Cured One-Part Metakaolin-Based Geopolymer Concrete

Ajayi,

Babafemi

2024

Applied Sciences

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The production of Portland cement (PC) is associated with carbon emissions. One-part geopolymer “just add water” is a user- and environmentally-friendly binder that can potentially substitute PC. However, there is limited research on the setting time, fresh, and strength properties of one-part metakaolin (MK)-based geopolymer concrete (OMGPC) incorporating recycled aggregates. Hence, the study explored the fresh, mechanical (compressive, flexural, splitting tensile, and E-modulus) and microstructural properties of ambient cured (7-, 28-, and 90-day) OMGPC containing recycled waste plastics (RESIN8) and recycled fine waste glass aggregate (FWG) at 5% and 10% by volume of the sand. The study result shows that 2% trisodium phosphate by wt. of the binder retard the initial and final setting times of OMGPC. At the same time, the incorporation of RESIN8 and FWG aggregates improved the workability of geopolymer concrete. The lightweight properties of RESIN8 aggregate reduce the hardened density of OMGPC, while the FWG specimens show a similar density to the control. The compressive strength of RESIN8 and FWG OMGPC range from 19.8 to 24.6 MPa and 26.9 to 30 MPa, respectively, compared to the control (26 to 28.9 MPa) at all curing ages. The flexural and splitting tensile strength of the OMGPC range from 2.2 to 4.5 MPa and 1.7 to 2.8 MPa, respectively. OMGPC is a viable alternative to Portland cement, and FWG can substitute sand in structural concrete by up to 10% and RESIN8 aggregate at 5% by volume of the natural sand.

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Section: Relation Between Compressive Flexural and Splitting Tensile ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Waste Plastic and Glass Aggregates on the Strength Properties of Ambient-Cured One-Part Metakaolin-Based Geopolymer Concrete

Ajayi,

Babafemi

2024

Applied Sciences

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“…The geopolymer formed by the above aluminosilicate precursors through chemical activation, mechanical activation or mechanochemical activation has the properties of cementitious binders [9][10][11][12][13]. However, geopolymer has a relatively less carbon footprint than conventional cementitious binders [14]. Using geopolymer to prepare concrete, carbon dioxide emissions can be reduced by 70 % to 90 % compared to cement [15].…”

Section: Introductionmentioning

confidence: 99%

The influence of recycled aggregate on the properties of geopolymeric recycled concrete: A comprehensive review

Lyu,

Xiao,

Singh

et al. 2023

JACF

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This paper offers a comprehensive review of geopolymeric recycled concrete (GRC) research, particularly focusing on mechanical properties, durability, microstructure, and the interfacial transition zone (ITZ). The study emphasizes the influence of recycled aggregate (RA) content on GRC performance. Findings indicate that higher RA content leads to a gradual reduction in GRC’s compressive, tensile, and flexural strengths, elastic modulus, and toughness. The elastic modulus is most affected, followed by compressive strength, while tensile strength experiences the least decline. Moreover, increased RA content is associated with elevated water absorption, decreased resistance to chloride ion permeability, sulfate corrosion, acid, frost, and carbonization in geopolymer concrete. The integration of RA creates more intricate ITZs in geopolymer concrete, resulting in reduced bonding strength and a looser, more porous microstructure. However, the use of geopolymers can mitigate these effects by enhancing bonding in ITZs. The paper also presents a statistical analysis of compressive strength test results from various studies and proposes a preliminary method for estimating the compressive strength of geopolymer concrete with different RA replacement rates.

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A Practical Mix Design Method of Ground Granulated Blast-Furnace Slag-Based One-Part Geopolymer Concrete

Alhamoud,

Tajmir Riahi,

Ataei

2023

Arab J Sci Eng

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Towards greener one-part geopolymers through solid sodium activators modification

Cited by 18 publications

References 51 publications

Effects of Waste Plastic and Glass Aggregates on the Strength Properties of Ambient-Cured One-Part Metakaolin-Based Geopolymer Concrete

Effects of Waste Plastic and Glass Aggregates on the Strength Properties of Ambient-Cured One-Part Metakaolin-Based Geopolymer Concrete

The influence of recycled aggregate on the properties of geopolymeric recycled concrete: A comprehensive review

A Practical Mix Design Method of Ground Granulated Blast-Furnace Slag-Based One-Part Geopolymer Concrete

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