Influence of Kaolin in Fly Ash Based Geopolymer Concrete: Destructive and Non-Destructive Testing

Yahya, Zarina; Abdullah, Mohd Mustafa Al Bakri; Ramli, Nurfaraheen Mohd; Burduhos-Nergis, Dumitru Doru; Razak, Rafiza Abd

doi:10.1088/1757-899x/374/1/012068

Cited by 31 publications

(23 citation statements)

References 11 publications

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“…Due to the fact that mainly any material rich in aluminum and silicon, which can be dissolved by an alkaline solution, can be used for geopolymers, a number of wastes have been identified globally with potential for geopolymerization, such as: furnace ash [13,14], red mud [15], blast furnace slag [16] etc. After the chemical reaction between the solid component, the waste, and the alkaline activator, a solution of sodium silicate and sodium hydroxide, a totally inorganic material with a similar structure to the zeolite is obtained.…”

Section: Geopolymers Structurementioning

confidence: 99%

Synthesis and Characteristics of Local Fly Ash Based Geopolymers Mixed with Natural Aggregates

Burduhos-Nergis¹,

Vizureanu²,

Corbu³

2019

Rev. Chim.

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Global industrialization generates large amount of waste which strongly affects the depositing areas and the living creatures from the surroundings. In the same time, the construction sector meets an exponential development process, resulting in materials and construction areas increase. Therefore, the need of new materials was felt worldwide. One solution that knew a rapid development, especially in this sector, was to obtain new eco-friendly materials through a mechanism called geopolymerization. True this powerful chemical reaction between a waste, rich in aluminum and silicon, and a strong alkaline solution, a tetragonal structure of Al-O-Si is obtained that possess properties comparable to those of Portland cement-based concrete. In the present paper the effect of aggregates on local fly ash based geopolymers is analyzed from the structure and mechanical properties point of view. According to this study, the aggregates strongly influence the density, compression strength and flexural strength at any age of samples.

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Section: Geopolymers Structurementioning

confidence: 99%

Synthesis and Characteristics of Local Fly Ash Based Geopolymers Mixed with Natural Aggregates

Burduhos-Nergis¹,

Vizureanu²,

Corbu³

2019

Rev. Chim.

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“…A recent study by Liu et al [ 19 ] also proved that the mix design of concrete, such as its water/cement ratio and proportion of constituent materials play a role in the formation of surface bugholes. In another study, image analysis of surface bugholes on concrete tunnel lining concluded that surface condition may be affected by workability of the mix, which indirectly correlates this factor with concrete durability [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Dogan et al proposed [ 15 ] that image processing of concrete could be taken as another non-destructive test similar to ultrasonic pulse velocity and Schmidt hammer to provide additional information for concrete properties prediction.…”

Section: Introductionmentioning

confidence: 99%

Image Analysis of Surface Porosity Mortar Containing Processed Spent Bleaching Earth

et al. 2021

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Image analysis techniques are gaining popularity in the studies of civil engineering materials. However, the current established image analysis methods often require advanced machinery and strict image acquisition procedures which may be challenging in actual construction practices. In this study, we develop a simplified image analysis technique that uses images with only a digital camera and does not have a strict image acquisition regime. Mortar with 10%, 20%, 30%, and 40% pozzolanic material as cement replacement are prepared for the study. The properties of mortar are evaluated with flow table test, compressive strength test, water absorption test, and surface porosity based on the proposed image analysis technique. The experimental results show that mortar specimens with 20% processed spent bleaching earth (PSBE) achieve the highest 28-day compressive strength and lowest water absorption. The quantified image analysis results show accurate representation of mortar quality with 20% PSBE mortar having the lowest porosity. The regression analysis found strong correlations between all experimental data and the compressive strength. Hence, the developed technique is verified to be feasible as supplementary mortar properties for the study of mortar with pozzolanic material.

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“…Although the potential benefits of TiO 2 nanoparticles have been known since 1921 [ 64 ], the ability to destroy microorganisms has only been documented after 65 years [ 65 , 66 , 67 ]. Currently, it is known that the analgesic and antifungal activity of nano–TiO 2 is evident on 11 genera of filamentous fungi, 3 yeasts, 2 amoeba, 1 Apicomplexan, 1 diplomonad, 1 ciliate and 7 algae, including 1 diatom, fungal spores being generally more resistant than vegetative forms [ 45 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of TiO2 Nanoparticles on the Resistance of Cementitious Composite Materials to the Action of Fungal Species

et al. 2021

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The development of mold films on the cement surfaces of buildings is a health and safety problem for the population, aesthetic but also in terms of their durability. The use of specific performance of cementitious composites containing TiO2 nanoparticles, photoactivated by UV radiation, can be a viable solution to mitigate to eliminate these problems. The experimental studies presented aim to analyze the capacity to inhibit the development of mold type Aspergillus and Penicillium on the surface of composite materials with nano-TiO2 content and the identification of the optimal range of nanomaterial addition. The identification and analysis of the inhibition halo (zone with a biological load of maximum 1–10 colonies of microorganisms) confirmed the biocidal capacity of the cementitious composites, but also indicated the possibility that an excess of TiO2 nanoparticles in the mixture could induce a development of cell resistance, which would be unfavorable both in terms of behavior and in terms of cost.

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Influence of Kaolin in Fly Ash Based Geopolymer Concrete: Destructive and Non-Destructive Testing

Cited by 31 publications

References 11 publications

Synthesis and Characteristics of Local Fly Ash Based Geopolymers Mixed with Natural Aggregates

Synthesis and Characteristics of Local Fly Ash Based Geopolymers Mixed with Natural Aggregates

Image Analysis of Surface Porosity Mortar Containing Processed Spent Bleaching Earth

Influence of TiO2 Nanoparticles on the Resistance of Cementitious Composite Materials to the Action of Fungal Species

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