Influence of cement and admixture on autogenous shrinkage of cement paste

Tazawa, Ei-ichi; Miyazawa, S.

doi:10.1016/0008-8846(95)00010-0

Cited by 247 publications

(66 citation statements)

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“…at the start of the autogenous shrinkage measurements, a negative shrinkage, or expansion of concrete was registered at some concrete compositions. This phenomenon has already been noted by some researchers (Hammer 1998;Tazawa and Miyazawa 1995), while in most literature the autogenous expansion is not mentioned at all, probably because it does not occur at all times, or because the autogenous shrinkage of normal strength concrete is rarely tested. Possible causes of this occurrence are:…”

Section: Autogenous Expansion Of Concretementioning

confidence: 88%

“…The initial autogenous expansion of concrete may be due to a greater quantity of belite (C 2 S) in cement, which swells and hence reduces autogenous shrinkage (Tazawa and Miyazawa 1995). However, as all mixtures were made with the same type of cement, the initial autogenous expansion of concrete is most probably due to the quantity of water as it was presented above.…”

Section: Autogenous Expansion Of Concretementioning

confidence: 91%

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Autogenous Shrinkage and Expansion Related to Compressive Strength and Concrete Composition

Marušić

Štirmer

2016

ACT

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An extensive research was undertaken in order to determine the dependence of shrinkage of high and normal strength concrete on the compressive strength and concrete composition. The part of research concerning dependence of autogenous shrinkage on compressive strength is presented in this paper. Ten groups of concrete, with the total of twenty nine mixtures, were prepared. Concrete mixtures of each individual group were made using the same quantity of water, while the quantity of cement (CEM II/A-S 42,5R) and mineral admixture (silica fume) was varied in each group. Concrete groups differed according to the quantity of water. Autogenous shrinkage of concrete was monitored together with the influence of initial curing in water on concrete shrinkage. Initial autogenous expansion was noticed during testing autogenous shrinkage, especially on normal strength concrete. Based on the analysis of experimental results, the dependence of autogenous shrinkage at one day of concrete age on compressive strength was defined. The dependence of autogenous shrinkage at later ages on compressive strength of concrete was also presented. Finally, the autogenous shrinkage components of best-known theoretical shrinkage prediction models were compared with experimental data.

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Section: Autogenous Expansion Of Concretementioning

confidence: 88%

Section: Autogenous Expansion Of Concretementioning

confidence: 91%

Autogenous Shrinkage and Expansion Related to Compressive Strength and Concrete Composition

Marušić

Štirmer

2016

ACT

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“…On the other hand, those of Belite-rich low-heat Portland cement (LPC) were 26%, 55%, 3%, and 9%, respectively. A previous study revealed that the mineral composition of cement affects autogenous shrinkage significantly (Tazawa et al 1993, Tazawa et al 1997. Based on Eq.…”

Section: Methodsmentioning

confidence: 99%

“…These studies revealed that expansive additive (Tazawa et al 1992b, Hori et al 1998, Tanimura et al 2000, Schwartzentruber et al 2002, shrinkage-reducing chemical agent (Tazawa et al 1992b, Takeuchi et al 1997, Tanimura et al 2000, Weiss et al 1999, Holt et al 2000, Bentz et al 2001, Berke et al 2003, as well as Portland cement containing higher C 2 S content and lower C 3 A content are obviously effective in reducing autogenous shrinkage (Tazawa et al 1995, Takeuchi et al 1997, Hori et al 1998, Tanimura et al 2000. Additionally, the effect of the combination of the above-mentioned materials on reducing autogenous shrinkage has been investigated, and HSCs with lower risk of early-age cracking have been developed (Ogawa et al 1995, Chikamatsu et al 1997, Sato et al 1999, Tanimura et al 2000, Kameta et al 2000, Hori et al 2001, Tanimura et al 2001a, Tanimura et al 2002a.…”

Section: Introductionmentioning

confidence: 99%

Serviceability Performance Evaluation of RC Flexural Members Improved by Using Low-Shrinkage High-Strength Concrete

Tanimura¹,

Satō

Hiramatsu³

2007

ACT

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This paper aims to show the importance of autogenous shrinkage for the serviceability performance of reinforced high-strength concrete (HSC) flexural beams, and also the effectiveness of low-shrinkage HSCs (LS-HSC) made by using expansive additive and/or shrinkage-reducing chemical agent and/or Belite-rich low-heat Portland cement for improving the flexural serviceability performance of beam. From the design equation point of view, this paper also proposes a new concept for evaluating flexural crack width and deformation of RC beams taking into consideration the early age deformation of concrete before loading. The experimental results show that autogenous shrinkage of HSC significantly affects increases in crack width and deformation of RC beams, while LS-HSCs markedly improves their serviceability performance. The present concept, which takes into account strain change in tension reinforcement and curvature change in the cracked section before and after loading, is effective in explaining the effects of shrinkage and expansion of concrete before loading on maximum crack width and flexural deformation of RC beams. JSCE (Japan Society of Civil Engineers) code equations for predicting maximum crack width and flexural deformation into which the present concept is incorporated improve the prediction accuracy compared with conventional equations and show fairly good agreement with experimental results.

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“…These studies revealed that expansive additive (Tazawa et al 1992b;Hori et al 1998;Tanimura et al 2000;Schwartzentruber et al 2002), shrinkage-reducing chemical agent (Tazawa et al 1992b;Weiss et al 1999;Tanimura et al 2000;Holt et al 2000;Bentz et al 2001;Berke et al 2003), as well as Portland cement containing higher C 2 S content and lower C 3 A or C 4 AF content (Tazawa et al 1995) are effective for reducing autogenous shrinkage. Additionally, the effect of the combination of the above-mentioned materials on reducing autogenous shrinkage has been investigated, and HSCs with lower risk of early-age cracking have been developed (Ogawa et al 1995;Chikamatsu et al 1997;Sato et al 1999a;Kameta et al 2000;Tanimura et al 2000;Hori et al 2001;Tanimura et al 2001b;Tanimura et al 2002b).…”

Section: Introductionmentioning

confidence: 99%

Early Age Deformation and Resultant Induced Stress in Expansive High Strength Concrete

Ito

Maruyama

Tanimura³

et al. 2004

ACT

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Expansive additive is well known to be effective in compensating early-age shrinkage and the resultant induced stress in reinforced high-strength concrete (HSC) members. On the other hand, there have been few studies on numerical analysis methods for evaluating such early-age induced stress, which are vital to verify the risk of cracking. The present study formulates a 3-dimensional finite element method as well as a practical calculation method based on the beam theory, both of which consider the principle of superposition and linear stress-strain relationship of creep, in order to evaluate the early-age shrinkage/expansion-induced stress in reinforced members. The applicability of the proposed methods is evaluated by comparing computed values with experimental values on shrinkage/expansion-induced stress in RC beam specimens composed of various HSCs, using expansive additive and/or shrinkage reducing chemical agent and/or low-heat Portland cement. The results demonstrate that the proposed finite element method can accurately simulate induced stress in the reinforced concrete beams, even when expansive additive is used, and this indicates that the linear stress-strain relationship may be valid for expansive high strength concrete. Furthermore, there is a good agreement between the finite element method and a practical calculation method based on the beam theory, even in the case of RC beams with stirrups that cause a three-dimensional restraint condition in concrete.

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Influence of cement and admixture on autogenous shrinkage of cement paste

Cited by 247 publications

References 0 publications

Autogenous Shrinkage and Expansion Related to Compressive Strength and Concrete Composition

Autogenous Shrinkage and Expansion Related to Compressive Strength and Concrete Composition

Serviceability Performance Evaluation of RC Flexural Members Improved by Using Low-Shrinkage High-Strength Concrete

Early Age Deformation and Resultant Induced Stress in Expansive High Strength Concrete

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