Influence of limestone filler and viscosity-modifying admixture on the shrinkage of self-compacting concrete

Valcuende, M.; Picó-Marco, E.; Parra, C.; Ros, Pedro Serna

doi:10.1016/j.cemconres.2012.01.001

Cited by 69 publications

(45 citation statements)

References 25 publications

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“…These findings are consistent with the many studies conducted on the effect of admixtures on concrete pore structure (12)(13)(14).…”

Section: • Porosity Accessible To Watersupporting

confidence: 81%

“…Today, admixtures are essential components in concrete (12)(13)(14)(27)(28)(29)(30), and superplasticisers are the type most commonly used (accounting for 70% of the total) (30). The inclusion of small amounts of admixture (less than 1 wt%) substantially improves both the workability of fresh concrete and the properties of the hardened material.…”

Section: • Porosity Accessible To Watermentioning

confidence: 99%

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A statistical approach to the study of concrete carbonation

García-Lodeiro¹,

Palomo²,

Fernández-Jiménez³

et al. 2014

Mater. construcc.

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Carbonation is one of the factors that conditions reinforced concrete durability, while porosity is one of the parameters that determines the carbonation rate: as a rule, the greater the porosity, the higher the rate. While many papers have been published on the effect of CO 2 penetration in the pore solutions of concretes prepared under different experimental conditions, the literature has yet to address the joint effect of the factors considered in concrete design, such as the water/cement (w/c) ratio, type of cement, type of aggregate and presence of admixtures. The present paper discusses the findings of a statistical study of the impact of the aforementioned factors on both system porosity and carbonation rate. The type of cement, individually and in its interaction with the rest of the factors, proved to be the major determinant in concrete carbonation. RESUMEN:Una aproximación estadística al estudio de la carbonatación del hormigón.-La carbonatación es uno de los factores que supedita la durabilidad del hormigón armado, siendo la porosidad uno de los parámetros que más condicionan la velocidad de carbonatación. Son muchos los trabajos que estudian el efecto de la penetración del CO 2 en la solución de los poros de hormigones preparados bajo distintas condiciones experimentales, sin embargo, no se encuentran referencias que analicen de forma conjunta el efecto de ciertos factores como son la relación agua/cemento (a/c ratio), el tipo de cemento, el tipo de árido y la presencia de aditivos, normalmente consideradas a la hora de diseñar un hormigón. En este trabajo se discuten los resultados obtenidos tras realizar un estudio estadístico del efecto que tienen los factores previamente mencionados, tanto en la porosidad de estos sistemas como en su nivel de carbonatación. El cemento tanto de manera individual como en sus interacciones con el resto de los factores es el factor que mas afecta a la carbonatación del hormigón.

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“…These findings are consistent with the many studies conducted on the effect of admixtures on concrete pore structure (12)(13)(14).…”

Section: • Porosity Accessible To Watersupporting

confidence: 81%

Section: • Porosity Accessible To Watermentioning

confidence: 99%

A statistical approach to the study of concrete carbonation

García-Lodeiro¹,

Palomo²,

Fernández-Jiménez³

et al. 2014

Mater. construcc.

View full text Add to dashboard Cite

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“…More amount of binding material lead to finer pore structure which in turn gives rise to shrinkage [23] [24]. Less amount of coarse aggregates and higher amount of binder material increases creep and elastic shortening [25].…”

Section: Hardened Properties Of Concretementioning

confidence: 99%

Comparison of Shrinkage, Creep and Elastic Shortening of VMA and Powder Type Self-Compacting Concrete and Normal Vibrated Concrete

Bhirud¹,

Sangle²

2017

OJCE

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Self-compacting concrete (SCC) is flowing in nature and hence viscosity modified agent (VMA) or higher amount of binder is used for stability of mix. The mix proportion of SCC is also different from normal vibrated concrete (NC). This modifies the properties of concrete at fresh as well as at hardened state. Three mixes, one VMA type SCC, one powder type SCC and one NC, are considered with identical water to binder ratio. Properties at fresh state such as workability and segregation resistance and at hardened stage such as compressive strength, elastic modulus, shrinkage, creep and elastic shortening are determined and compared. Powder type SCC shows superior properties at fresh stage. Also compressive strength of powder type SCC is found better than that of VMA SCC and NC. Observations show more shrinkage, elastic shortening and creep for powder type SCC as compared with VMA SCC and NC.

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“…A high volume of limestone filler is also used frequently to increase the content of fine particles and optimize the particle packing in self-compacting concrete (SCC) mixes [2]. The use of limestone in cement or concrete seems to have many benefits, such as reducing water demand, improving strength development, and being economical [3,4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Cement Type and Water-to-Cement Ratio on the Formation of Thaumasite

Zhang

2017

Advances in Materials Science and Engineering

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Cement mortar prisms were prepared with three different cement types and different water-to-cement ratios plus 30% mass of limestone filler. After 28 days of curing in water at room temperature, these samples were submerged in 2% magnesium sulfate solution at 5 ∘ C and the visual appearance and strength development for every mortar were measured at intervals up to 1 year. Samples selected from the surface of prisms after 1-year immersion were examined by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The results show that mortars with sulfate resisting Portland cement (SRC) or sulphoaluminate cement (SAC) underwent weaker degradation due to the thaumasite form of sulfate attack than mortars with ordinary Portland cement (OPC). A lower water-to-cement ratio leads to better resistance to the thaumasite form of sulfate attack of the cement mortar. A great deal of thaumasite or thaumasite-containing materials formed in the OPC mortar, and a trace of thaumasite can also be detected in SRC and SAC mortars. Therefore, the thaumasite form of sulfate attack can be alleviated but cannot be avoided by the use of SAC or SRC.

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Influence of limestone filler and viscosity-modifying admixture on the shrinkage of self-compacting concrete

Cited by 69 publications

References 25 publications

A statistical approach to the study of concrete carbonation

A statistical approach to the study of concrete carbonation

Comparison of Shrinkage, Creep and Elastic Shortening of VMA and Powder Type Self-Compacting Concrete and Normal Vibrated Concrete

Influence of Cement Type and Water-to-Cement Ratio on the Formation of Thaumasite

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