Production of geopolymer mortar system containing high calcium biomass wood ash as a partial substitution to fly ash: An early age evaluation

Abdulkareem, Omar A.; Ramli, Mahyuddin; Matthews, John C.

doi:10.1016/j.compositesb.2019.106941

Cited by 72 publications

(31 citation statements)

References 29 publications

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“…The potential use of non-wood BMA in alkali-activated concrete as a source of silica and alkalis, when combined with coal FA and activated with SS and SH to produce binders based on aluminosilicate hydrates, were reported. 20,21 Positive effects including pore-filling effect, formation of less ordered and homogeneous microstructures, and the dual formation of calcium silicate hydrate and highly geo-polymerized units were reported for palm oil fuel ash. 22 The relatively high silica content of non-wood BMA suggests its potential use in the production of alkali silicate for the activation step.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the studies on the incorporation of BMA in geopolymer concrete or alkali‐activated composites cover the partial substitution of the traditional precursors (such as FA, GGBS, or MK). The potential use of non‐wood BMA in alkali‐activated concrete as a source of silica and alkalis, when combined with coal FA and activated with SS and SH to produce binders based on aluminosilicate hydrates, were reported 20,21 . Positive effects including pore‐filling effect, formation of less ordered and homogeneous microstructures, and the dual formation of calcium silicate hydrate and highly geo‐polymerized units were reported for palm oil fuel ash 22 …”

Section: Introductionmentioning

confidence: 99%

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Bio‐derived sodium silicate for the manufacture of alkali‐activated binders: Use of bamboo leaf ash as silicate source

Vinai

Ntimugura

Cutbill

et al. 2022

Int J Applied Ceramic Tech

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Alkali activated binders are a promising alternative to the use of Portland cement in the manufacture of concrete for curbing CO2 emissions. Novel sources of silicates have been investigated in recent years for reducing cost and environmental impacts associated with the use of chemical activators. This study describes the production of solid sodium silicate (SS) activating powder from bamboo leaf ash (BLA). Bamboo leaves were calcined at 550–800°C, mixed with NaOH pellets, and heated in an oven at 300°C. The obtained silicate powder was used for activating blended fly ash/slag samples. Mechanical and microstructural properties of BLA‐based samples were compared to those of samples made with commercially available chemicals. The strength of BLA‐activated mortars matched the commercially‐sourced activators, being 25–30 MPa at 7 days and exceeding 40 MPa at 28 days. The microstructural analysis suggested that BLA‐based SS showed a lesser degree of dissolution of precursors at 7 days, but the quality of the matrix was higher than that of NaOH‐activated samples. These results confirmed that the reactivity of BLA‐silicate powder was similar to that of commercial SS solutions, and show the potential valorization of future biomass renewable waste in the production of low carbon, alkali‐activated concretes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bio‐derived sodium silicate for the manufacture of alkali‐activated binders: Use of bamboo leaf ash as silicate source

Vinai

Ntimugura

Cutbill

et al. 2022

Int J Applied Ceramic Tech

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“…The chemical composition of wood ash was analyzed and showed the presence of potassium oxide in the inside matrix of wood ash [24]. Biomass Wood Ash was used to produce the geopolymer concrete, and it was limited to 10 percent due to the uncertainty of later age geopolymer reaction [25]. High Calcium wood ash was used as an aluminosilicate source material to produce geopolymer concrete, resulting in reduced strength in later ages due to high calcium [26].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and durability characterization of hybrid fibre reinforced green geopolymer concrete

Arunkumar¹,

Muthukannan²,

Kumar³

et al. 2021

Res. Eng. Struct. Mater.

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“…Con-Scientific Review -Engineering and Environmental Sciences (2021) , 30 (3 Use of waste paper ash or wood ash as substitution to fly ash in production of geopolymer concrete crete is mainly used in the construction of buildings in civil engineering applications and infrastructure projects. Hence, the construction of buildings is under increasing pressure of developing green binder materials that possess the desired engineering properties to overcome the CO 2 emission and reduce the dependence on the OPC (Małaszkiewicz & Jastrzębski, 2018;Abdulkareem, Ramli & Matthews, 2019). Several alternative cementitious materials that are principally derived from industrial by-products can provide comparable performance to the OPC in a range of applications, but with an additional advantage of significantly reduced greenhouse emissions (Gartner, 2004).…”

Section: Introductionmentioning

confidence: 99%

Use of waste paper ash or wood ash as substitution to fly ash in production of geopolymer concrete

Owaid

Al-Baghdadi

Al-Rubaye

2021

srees

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Large quantities of paper and wood waste are generated every day, the disposal of these waste products is a problem because it requires huge space for their disposal. The possibility of using these wastes can mitigate the environmental problems related to them. This study presents an investigation on the feasibility of inclusion of waste paper ash (WPA) or wood ash (WA) as replacement materials for fly ash (FA) class F in preparation geopolymer concrete (GC). The developed geopolymer concretes for this study were prepared at replacement ratios of FA by WPA or WA of 25, 50, 75 and 100% in addition to a control mix containing 100% of FA. Sodium hydroxide (NaOH) solutions and sodium silicate (Na2SiO3) are used as alkaline activators with 1M and 10M of sodium hydroxide solution.The geopolymer concretes have been evaluated with respect to the workability, the compressive strength, splitting tensile strength and flexural strength. The results indicated that there were no significant differences in the workability of the control GC mix and the developed GC mixes incorporating WPA or WA. Also, the results showed that, by incorporating of 25–50% PWA or 25% WA, the mechanical properties (compressive strength, splitting tensile strength and flexural strength) of GC mixes slightly decreased. While replacement with 75–100% WPA or with 50–100% WA has reduced these mechanical properties of GC mixes. As a result, there is a feasibility of partial replacement of FA by up to 50% WPA or 25% WA in preparation of the geopolymer concrete.

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Production of geopolymer mortar system containing high calcium biomass wood ash as a partial substitution to fly ash: An early age evaluation

Cited by 72 publications

References 29 publications

Bio‐derived sodium silicate for the manufacture of alkali‐activated binders: Use of bamboo leaf ash as silicate source

Bio‐derived sodium silicate for the manufacture of alkali‐activated binders: Use of bamboo leaf ash as silicate source

Mechanical and durability characterization of hybrid fibre reinforced green geopolymer concrete

Use of waste paper ash or wood ash as substitution to fly ash in production of geopolymer concrete

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