Uniformity of in situ properties of self-compacting concrete in full-scale structural elements

Zhu, Wenzhong; Gibbs, John C.; Bartoš, Petr

doi:10.1016/s0958-9465(00)00053-6

Cited by 89 publications

(49 citation statements)

References 2 publications

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“…It is a highly workable concrete that can easily flow through heavily RC sections without the need for mechanical vibration. Its development represents one of the most significant recent advances in concrete technology (Khayat and Workability 1999;Zhu et al 2001). Due to the high workability requirement, guidelines associated with the design of SCC recommended the use of chemical admixtures such as high-range water reducer (HRWR) and viscosity modifying admixtures (VMA) with minimum water content varying between 0.37 and 0.4 (EFNARC 2005).…”

Section: Introductionmentioning

confidence: 99%

Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Mahmoud

Ibrahim

El-Chabib

et al. 2013

Int J Concr Struct Mater

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The use of sustainable technologies such as supplementary cementitious materials (SCMs), and/or recycled materials is expected to positively affect the performance of concrete mixtures. However, it is imperative to qualify and implement such mixtures in practice, if the required specifications of their intended application are met. This paper presents the results of a laboratory investigation of self-consolidating concrete (SCC) containing sustainable technologies. Twelve mixes were prepared with different combinations of fly ash, slag, and recycled asphalt pavement (RAP). Fresh and hardened concrete properties were measured, as expected the inclusion of the sustainable technologies affected both fresh and hardened concrete properties. Analysis of the experimental data indicated that inclusion of RAP not only reduces the ultimate strength, but it also affected the compressive strength development rate. The addition of RAP to mixes showed a consistent effect, with a drop in strength after 3, 14, and 28 days as the RAP content increased from 0 to 50 %. However, most of the mixes satisfied SCC fresh properties requirements, including mixes with up to 50 % RAP. Moreover, several mixes satisfied compressive strength requirement for pavements and bridges, those mixes included relatively high percentages of SCMs and RAP.

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Section: Introductionmentioning

confidence: 99%

Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Mahmoud

Ibrahim

El-Chabib

et al. 2013

Int J Concr Struct Mater

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“…Para la realización en laboratorio de estos ensayos físicos y mecánicos se fabricaron probetas cilíndricas (diámetro, 15 cm; altura, 30 cm), cúbicas (10x10x10 cm 3 …”

Section: Programa Experimentalunclassified

“…Para mejorar las propiedades mecánicas a tracción y a flexión del hormigón estructural, se añaden también fibras cortas, de acero principalmente en forma de grapas o hilos, además de las necesarias barras de refuerzo, pero en mayor fracción volumétrica (1-2%) que la requerida para el control de la microfisuración a edades tempranas (3,4). Estas mezclas de hormigones reforzados con mayores cantidades de fibras cortas de acero presentan consistencia seca o muy seca en los ensayos de cono de Abrams.…”

Section: Introductionunclassified

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Aumento de la tenacidad de hormigones autocompactables reforzados con fibras cortas de polipropileno

Melián¹,

Barluenga²,

Olivares³

2010

Mater. construcc.

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“…SCC has proven advantages enhancing construction productivity, reducing the overall cost of the structure, improving the work environment, achieving sustainable characteristics, increasing the practically allowable reinforcement rate, and increasing the construction rate and overall quality of the cast structures [7][8][9]. Though not a real disadvantage, a practical drawback could be the necessary quality control of its fresh properties, since this aspect involves the execution of simple but new tests methods to which people at site are still not familiar.…”

Section: Introductionmentioning

confidence: 99%

Hardened properties of self-compacting concrete — A statistical approach

Filho¹,

Barragán

Casas

et al. 2010

Construction and Building Materials

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This work presents a statistical stud y on the variability of the mechanical properties of hardened self-compacting concrete, including the compressive strength, splitting tensile strength and modulus of elasticity. The comparison of the experimental results with those derived from several codes and recommendatio ns allows evaluating if the hardened behavio ur of self-compacting concrete can be appropriately predicted by the existing formulations. The variables analyzed include the maximum size aggregate, paste and gravel content. Results from the analyzed self-compacting concretes presented variability measures in the same range than the expected for conventional vibrated concrete, with all the results within a confidence level of 95%. From several formulations for conventional concrete considered in this study, it was observed that a safe estimation of the modulus of elasticity can be obtained from the value of compressive strength; with lower strength self-compacting concretes presenting higher safety margins. However, most codes overestimate the material tensile strength.

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Uniformity of in situ properties of self-compacting concrete in full-scale structural elements

Cited by 89 publications

References 2 publications

Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Aumento de la tenacidad de hormigones autocompactables reforzados con fibras cortas de polipropileno

Hardened properties of self-compacting concrete — A statistical approach

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