Durability properties of low-resistance self-compacting concrete

Assié, Stéphan; Escadeillas, Gilles; Marchese, Giulio; Waller, Vincent

doi:10.1680/macr.2006.58.1.1

Cited by 14 publications

(7 citation statements)

References 5 publications

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“…When the slope of the line obtained by the regression analysis method is taken as a parameter, it can be observed that the mixture E has the greatest slope, and thus the fastest water absorption of all tested mixtures. This is in accordance with the fact that the addition of fly ash improves the structure of the concrete and thus the water absorption is less, which corresponds to the attitude given in the literature [56]. Comparing only mixtures containing fly ash, FA-10 has the highest slope, followed by the FA-20 and finally the FA-50.…”

Section: Densitysupporting

confidence: 89%

Valorization of fly ash from a thermal power plant for producing high-performance self-compacting concrete

et al. 2020

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This study analyzes the feasibility of valorizing industrial by-product, fly ash from a thermal power plant as a partial replacement of mineral filler-limestone for the production of self-compacting concrete (SCC). Three types of SCC mixtures with different portions of fly ash and the reference mixture with limestone were designed. The synthesized SCCs in the fresh state were examined for density, entrained air content, flowability (Slump flow, Slump flow time (t500), V-funnel time (tv)), passing ability (L-box), and segregation resistance, while hardened state testing included: density, compressive and flexural strength, static modulus of elasticity, water permeability, resistance against freezing in the presence of de-icing salt, and SEM analysis. Taking into account the obtained results it can be concluded that the addition of fly ash has a positive impact on the concrete properties and that the optimal content of fly ash is 20 % with respect to the total filler mass.

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Section: Densitysupporting

confidence: 89%

Valorization of fly ash from a thermal power plant for producing high-performance self-compacting concrete

et al. 2020

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“…Linear regression analysis gave equations with high values of correlation coefficients. Obviously, E has the greatest slope, and thus the fastest water absorption, which is in accordance with the fact that the FA addition improves the concrete structure resulting in lower water absorption [21]. Comparing only mixtures with FA, FA-10 has the greatest slope, followed by FA-20 and finally by FA-50.…”

Section: Figure 2 Density Change Of Hardened Sccs Versus Timesupporting

confidence: 73%

Enhancing properties of concrete by addition of fly ash from a thermal power plant for application in geothermal systems

Vlahović¹,

Savić²,

Martinović³

et al. 2020

Proceedings of the 8th International Conference on Renewable Electrical Power Sources

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Electric power in Serbia is predominantly provided by thermal power plants. All of eleven existing thermal power plants in Serbia use coal, mainly lignite in the electricity production process thus generating about 6 million tons of fly ash per year. The estimated amount of fly ash from thermal power plants accumulated in Serbian landfills exceeds 200 million tons. On the other hand, during the last decades, respecting the principles of ecologically sustainable development has been imposed on industries, and one of them is the construction industry. Due to the presence of amorphous SiO2 and Al2O3, fly ash as pozzolanic material is convenient for the production of concrete and mortar. Consequently, multiple positive effects can be expected by the proper consumption of fly ash- reducing landfills and improving concrete properties. The idea of this study is to analyze the possibility of recycling fly ash from a thermal power plant by replacing a part of common mineral filler- limestone in the production of self-compacting concrete (SCC). Properties of conventional SCC with limestone and compositions with different fly ash content were compared. Considering that requirements for SCC should be satisfied and all properties remain or enhance in the case of fly ash addition, this study proved that all designed concretes can be used for structural applications.

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“…Fernández et al [10] ind ican, de 52 tipos de hormigones autocompactantes, un valor medio de fluencia específica de 57 µm/m/MPa y de 14 hormigones convencionales un valor de 85 µm/m/MPa, contrario a lo señalado en algunas investigaciones y documentos [11,12,13,14] en las que se afirma que la fluencia en el caso del hormigón autocompactante es mayor que el convencional. Parapinski et al [15], obtuvieron para una edad de 100 días valores entre 80 y 110 µm/m/MPa de fluencia específica, más cercanos a los obtenidos en el presente trabajo.…”

Section: Tabla 3 Otras Propiedades De Los Hacs Endurecidosunclassified

Caracterización mecánica y reológica de un hormigón autocompactante elaborado con finos de recuperación procedentes de la fabricación de mezclas asfálticas

Mingorance

Romero²,

Montero

et al. 2018

Libro De Comunicaciones / Livro Das Comunicações

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RESUMENEn el trabajo que se presenta se estudia la valorización de un fíller de recuperación, procedente de una planta de fabricación de aglomerados asfálticos, para su uso en la elaboración de hormigones autocompactantes (HAC) con aplicaciones estructurales. En primer lugar, se ha caracterizado el fíller para determinar su potencial aplicabilidad en este tipo de hormigones. Posteriormente, se ha diseñado y confeccionado un hormigón autocompactante con las prescripciones impuestas para una clase IIb de exposición ambiental, partiendo del método de dosificación de Okamura y ajustando mediante amasadas de prueba las proporciones hasta cumplir los requisitos normalizados de autocompactabilidad. Una vez logradas, el trabajo se ha centrado en la evaluación de las características mecánicas y reológicas del hormigón seleccionado, determinando su comportamiento en cuanto a su resistencia a compresión y tracción, módulo de deformación, coeficiente de Poisson, retracción por secado y fluencia. Los resultados obtenidos han confirmado que con este fíller de recuperación se pueden satisfacer plenamente los requisitos de autocompactabilidad exigidos por la normativa actual, si bien este hormigón exige una mayor dosis de aditivo superplastificante para lograrlos. Asimismo, el hormigón ha alcanzado valores en las propiedades mecánicas adecuados para su aplicación estructural aunque se ha observado mayor deformabilidad que en el hormigón de referencia. PALABRAS CLAVE:Hormigón autocompactante, fíller de recuperación, fluencia, retracción.

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Durability properties of low-resistance self-compacting concrete

Cited by 14 publications

References 5 publications

Valorization of fly ash from a thermal power plant for producing high-performance self-compacting concrete

Valorization of fly ash from a thermal power plant for producing high-performance self-compacting concrete

Enhancing properties of concrete by addition of fly ash from a thermal power plant for application in geothermal systems

Caracterización mecánica y reológica de un hormigón autocompactante elaborado con finos de recuperación procedentes de la fabricación de mezclas asfálticas

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