Effect of Combined Metakaolin and Basalt Powder Additions to Laterite-Based Geopolymers Activated by Rice Husk Ash (RHA)/NaOH Solution

Venyite, Paul; Makone, Eugene Charles; Kaze, Cyriaque Rodrigue; Nana, Achile; Nemaleu, Juvenal Giogetti Deutou; Kamseu, Elie; Melo, Uphie Chinje; Leonelli, Cristina

doi:10.1007/s12633-021-00950-7

Cited by 36 publications

(15 citation statements)

References 55 publications

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“…Several recent studies stated that iron oxide has an important role in the formation of geopolymers [13][14]. Venyite et al [15] stated that limited aluminate leads to the replacement of aluminum (Al) by iron (Fe) atoms to form ferro-silicate-aluminate.…”

Section: Introductionmentioning

confidence: 99%

“…This is due to limited methods for analyzing geopolymer structures. The method most often used in geopolymer analysis is nuclear magnetic resonance spectroscopy (NMR), which will be disturbed in the analysis if there is a high iron element [15][16]. The study from Gomes et al [17] stated that iron oxide decreases the strength of geopolymer concrete, although Venyite et al [15] had a different result.…”

Section: Introductionmentioning

confidence: 99%

“…The method most often used in geopolymer analysis is nuclear magnetic resonance spectroscopy (NMR), which will be disturbed in the analysis if there is a high iron element [15][16]. The study from Gomes et al [17] stated that iron oxide decreases the strength of geopolymer concrete, although Venyite et al [15] had a different result. Apart from the chemical content of fly ash, several parameters that also determine the strength of geopolymer concrete are dust grains fineness, temperature and duration of curing, type and molarity of alkali activator, and pH [5,10,18].…”

Section: Introductionmentioning

confidence: 99%

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An Experimental Study on the Mechanical Properties of Low-Aluminum and Rich-Iron-Calcium Fly Ash-Based Geopolymer Concrete

Widjajakusuma

Bali

et al. 2022

Adv. technol. innov.

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Limited studies have been conducted on low-aluminum and rich-iron-calcium fly ash (LARICFA)-based geopolymer concrete with increased strength. This study aims to investigate the mechanical characteristics of LARICFA-based geopolymer concrete, including its compressive strength, split tensile strength, and ultimate moment. The steps of this study include material preparation and testing, concrete mix design and casting, specimen curing and testing, and the analysis of testing results. Furthermore, the specimen tests consist of the bending, compressive, and split tensile strength tests. The results show that the average compressive strength and the ultimate moment of the geopolymer concrete are 38.20 MPa and 22.90 kN·m, respectively, while the average ratio between the split tensile and compressive strengths is around 0.09. Therefore, the fly ash-based geopolymer concrete can be used in structural components.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Experimental Study on the Mechanical Properties of Low-Aluminum and Rich-Iron-Calcium Fly Ash-Based Geopolymer Concrete

Widjajakusuma

Bali

et al. 2022

Adv. technol. innov.

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“…The assessment of hydration process was performed in MK-blended cement. It was noticed that, the rate of CH consumption and pozzolanic reaction was comparatively higher than at early ages when compared to FA-blended cement (11) .…”

Section: Introductionmentioning

confidence: 95%

Experimental studies on the utilization of kaolinite amalgamated in cement mortar

Kumar¹,

Prabu²,

Shalini³

2021

IJST

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Objective: To investigate the physical and strength properties of mortar using locally available mineral admixture. Methodology: The compressive strength of the mortar at different temperatures was found. Setting time, consistency, and porosity were also studied by blending natural kaolinite and metakaolinite (MK) with cement in different proportions. An experimental work was carried out using control mix and adding kaolinite from 5% to 20% in ordinary Portland cement (OPC) at 5% equal intervals. Findings: The test results revealed that the use of natural admixtures such as Natural kaolinite (NK) and MK in OPC enhances the performance of the binder in mortar. The compressive strength enhancement of natural kaolinite cement-blended binder was comparatively lower than that of control mortar for all percentages whereas the mortar added to MK had increased strength. MK mortar with a 15% mix proportion was the optimum one to yield maximum compressive strength. Novelty: The present research work is focused on the partial replacement of metakaoline with temperature variant and the percentage of dosage used as a double variant parameter.

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“…It has been found that rice husk ash [11][12][13], fly ash [14][15][16] and wheat straw ash [17,18], etc. can improve the pore structure and mechanical properties of magnesium oxychloride cement.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Pore Structure Characteristics of Magnesium Oxychloride Cement Modified by Highland Barley Straw Ash

Cao

Huang

Wang

et al. 2021

Preprint

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Highland barley straw ash contains a large amount of silica, and the ash calcined and ground under certain conditions has a higher pozzolanic effect. In order to study the effect of HBSA added into magnesium oxychloride cement mortar (MOCM) on the mechanical properties and pore structure, the activity of highland barley straw ash was studied firstly through the macroscopic mechanical properties test. Nuclear magnetic resonance (NMR) and Brunner−Emmet−Teller (BET) were used to test the distribution of full pore and micropore for MOCM respectively. The microstructure of MOCM was characterized by scanning electron microscope (SEM). The results illustrate that the highest activity of HBSA was obtained by calcining at 600℃ for 2h and grinding for 2h. The addition of HBSA has a significant effect on the mechanical properties and pore diameter distribution of MOCM. A large amount of M-S-H gel was generated in MOCM added with 10% HBSA content, and had a consequence of decreased proportion of larger pores and the increased proportion of micropores as well as the better mechanical properties and pore structure.

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Effect of Combined Metakaolin and Basalt Powder Additions to Laterite-Based Geopolymers Activated by Rice Husk Ash (RHA)/NaOH Solution

Cited by 36 publications

References 55 publications

An Experimental Study on the Mechanical Properties of Low-Aluminum and Rich-Iron-Calcium Fly Ash-Based Geopolymer Concrete

An Experimental Study on the Mechanical Properties of Low-Aluminum and Rich-Iron-Calcium Fly Ash-Based Geopolymer Concrete

Experimental studies on the utilization of kaolinite amalgamated in cement mortar

Mechanical Properties and Pore Structure Characteristics of Magnesium Oxychloride Cement Modified by Highland Barley Straw Ash

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