Effect of some admixtures on the setting time and strength evolution of cement pastes at early ages

Aggoun, Salima; Zouaoui, Mustapha Cheikh; Chikh, Nasr‐Eddine; Duval, R. M. Pradeilles

doi:10.1016/j.conbuildmat.2006.05.043

Cited by 152 publications

(73 citation statements)

References 7 publications

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“…On one hand, the conventional equations used to relate the evolution of mechanical properties and the maturity index might not apply to mixes with accelerators. On the other hand, changes in the characteristics of the support over which the material is sprayed may affect the heat transfer of the concrete layer [9,10].…”

Section: Introductionmentioning

confidence: 99%

Maturity method to predict the evolution of the properties of sprayed concrete

Galobardes

Cavalaro

Goodier

et al. 2015

Construction and Building Materials

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The maturity method provides a simple approach for assessing the strength evolution of concrete.Although it is already used in the precast industry, no reported applications with sprayed concrete may be found in the literature. Such concrete presents singular characteristics due to the spraying process and, in some cases, due to the introduction of accelerators that modify the kinetics of cement hydration.Consequently, the traditional equations that relate the evolution of mechanical properties and the maturity index might not apply in this case. The objective of this study is to adapt the maturity method to sprayed concrete. An experimental program was conducted with 24 concrete mixes sprayed in laboratory and tested for the evolution of temperature and compressive strength. An alternative equation was proposed to relate the maturity index and the mechanical properties. Subsequently, finite element models were developed to generalize the maturity curves considering the local design parameters.

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Section: Introductionmentioning

confidence: 99%

Maturity method to predict the evolution of the properties of sprayed concrete

Galobardes

Cavalaro

Goodier

et al. 2015

Construction and Building Materials

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“…Researchers have performed many tests on different accelerator blends and their effects on hydration, setting, and strength development [4,[7][8][9][10]. However, little research has been done on how these accelerators in combination with typical water-reducing and retarding admixtures affect the overall cracking potential of concrete.…”

Section: Introductionmentioning

confidence: 99%

Effects of chloride and chloride-free accelerators combined with typical admixtures on the early-age cracking risk of concrete repair slabs

Meagher

Shanahan

Buidens

et al. 2015

Construction and Building Materials

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“…The combined use of TEA and calcium nitrate was first suggested in 1981 [7]. Aggoun et al [8] recently showed that when calcium nitrate was used in combination with either TEA or TIPA, both the setting time and strength gain were accelerated for all of the cements used in the study.…”

Section: Introductionmentioning

confidence: 99%