Performance evaluation on engineering properties of sodium silicate binder as a precursor material for the development of cement-free concrete

Kanagaraj, Balamurali; Anand, N.; R, Samuvel Raj; Lublóy, Éva

doi:10.1016/j.dibe.2022.100092

Cited by 8 publications

(3 citation statements)

References 68 publications

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“…Porosity, sorptivity, and water permeability are some of the quantitative measurements used to estimate the magnitude of porous levels in concrete. The rate of absorption of water by capillary suction is called sorptivity of unsaturated concrete [28].…”

Section: Interaction Between Sorptivity and Porositymentioning

confidence: 99%

SEM Image-based Porosity Analysis of Fire Damaged High Strength Concrete

Andrushia,

Anand,

Lublóy

et al. 2024

Period. Polytech. Civil Eng.

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The porosity of concrete affects the durability of reinforced concrete structures, wherein high levels of porosity are linked to a shorter service life. Recent works have noted that high porosity levels naturally exist in the aftermath of a fire exposure – especially when concrete is classified as high strength concrete (HSC). To shed more light into this phenomenon, this paper showcases a method for measuring the porosity of HSC under elevated temperatures through scanning electron microscopy (SEM). In this method, SEM-based images were examined to quantify the surface porosity of fire-affected HSC. Detailed image analysis was performed for HSC exposed to various heating durations. The study concludes that the surface porosity obtained via the SEM processing method is in good agreement with that from the SEM-based method (with a minor average difference of 3.8%). As such, the proposed method is expected to be reliable for the porosity analysis of fire-damaged concrete.

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Section: Interaction Between Sorptivity and Porositymentioning

confidence: 99%

SEM Image-based Porosity Analysis of Fire Damaged High Strength Concrete

Andrushia,

Anand,

Lublóy

et al. 2024

Period. Polytech. Civil Eng.

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“…As mentioned above, AS is a combination of NH and NS. The NH concentration employed in the present investigation is four molarity, and the ratio of AS used is 1:1.5 [34]. The pellets or flakes of NH are to be made into a solution before concrete production [35].…”

Section: Expanded Polystyrene (Eps)mentioning

confidence: 99%

Performance of Sustainable Insulated Wall Panels with Geopolymer Concrete

Kanagaraj

Kiran

Gunasekaran³

et al. 2022

Materials

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The increase in the population creates an increased demand for construction activities with eco-friendly, sustainable, and high-performance materials. Insulated concrete form (ICF) is an emerging technology that satisfies the sustainability demands of the construction sector. ICF is a composite material (a combination of expanded polystyrene (EPS) and geopolymer concrete (GPC)) that enhances the performance of concrete (such as thermal insulation and mechanical properties). To investigate the axial strength performance, five different types of prototypes were created and tested. Type I (without reinforcement): (a) hollow EPS without concrete, (b) alternative cells of EPS filled with concrete, (c) and all the cells of EPS filled with concrete; and Type II (with reinforcement): (d) alternative cells of EPS filled with concrete; (e) and all the cells of EPS filled with concrete. Amongst all the five prototypes, two grades of GPC were employed. M15 and M20 grades are used to examine the effectiveness in terms of cost. For comparing the test results, a reference masonry unit was constructed with conventional clay bricks. The main aim of the investigation is to examine the physical and mechanical performance of sandwich-type ICFs. The presence of polystyrene in ICF changes the failure pattern from brittle to ductile. The result from the study reveals that the Type II prototype, i.e., the specimen with all the cells of EPS filled with concrete and reinforcement, possesses a maximum load-carrying capacity greater than the reference masonry unit. Therefore, the proposed ICF is recommended to replace the conventional load-bearing system and non-load-bearing walls.

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“…It is water-soluble, fire-resistant, non-toxic, and, hence, not dangerous to human health, environment-friendly, and economically convenient [38][39][40]. It has been employed in several sectors, such as to produce detergents and cleaning compounds [38], for material treatments [40], in ceramics [41], and in the production of geopolymers [42] and concretes [43]. Among its several uses, the employment of sodium silicate as a binder to produce bio-based building composites could be a promising possibility [44].…”

Section: Introductionmentioning

confidence: 99%

Hygroscopicity and Morphology of Bio-Based Boards—The Influence of the Formulation

Cintura,

Nunes,

Molari

et al. 2024

Applied Sciences

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The internal structures and the hygroscopicity of bio-based boards consisting of giant reed (Arundo donax L.) and hazelnut shells as bio-aggregates, and a sodium silicate solution as the adhesive, were investigated. The aim was to evaluate the influence of each material (the bio-aggregates and adhesive) and their distributions in the boards on the final performance. By carrying out X-ray computed tomography, the internal structures and the porosities of the boards were determined, allowing important considerations of their hygroscopicity. The voids’ percentages were between 26% and 36% of the total volume of the composites. Both the materials and the composites demonstrated high hygroscopicity. In particular, the mixtures of the bio-aggregates and the sodium silicate allowed reaching a moisture buffering value of 7.44 g/(m2%RH) for the A. donax-based composite, 3.86 g/(m2%RH) for the hazelnut-shell-based composite, and 4.65 g/(m2%RH) for the mixture-based composite. Besides the identification of the contributions of the materials, a detailed discussion of the assessed properties was carried out to use these bio-based boards in vernacular historic construction. The results show how the aggregate type and the adhesive content affected the final behavior, demonstrating the importance of a conscious material choice. Furthermore, helpful information for the future development of these types of bio-based boards and their possible optimization was provided.

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Performance evaluation on engineering properties of sodium silicate binder as a precursor material for the development of cement-free concrete

Cited by 8 publications

References 68 publications

SEM Image-based Porosity Analysis of Fire Damaged High Strength Concrete

SEM Image-based Porosity Analysis of Fire Damaged High Strength Concrete

Performance of Sustainable Insulated Wall Panels with Geopolymer Concrete

Hygroscopicity and Morphology of Bio-Based Boards—The Influence of the Formulation

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