Influence of CaSO4·2H2O, CaSO4·12H2O and CaSO4 on the initial hydration of clinker having different burning degree

Uchikawa, Hiroshi; Uchida, Shunichiro; Ogawa, Kenji; Hanehara, Shunsuke

doi:10.1016/0008-8846(84)90027-9

Cited by 38 publications

(12 citation statements)

References 4 publications

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“…Time (hrs) 18 24 For the anions, the sol-ion concentration was initially at 120 meq/L. It gradually decreased to a plateau level at around 100 meq/L; subsequently it slightly increased.…”

Section: A Methods Of Incorporatin G Organic Ions Into the Charge Balamentioning

confidence: 99%

“…Uchikawa et al [18] also measured the concentration of the Ca Odler et al [19] examined the effects of the different fonns of the calcium sulfate and found that the rate of ettringite fonnation was reduced and the beginning of its conversion to the monosulfate was delayed if anhydrite was used as the CaSo 4 • com· pared to the hemihydrate or gypsum.…”

Section: Role Of Caso In Cement Paste Hydrationmentioning

confidence: 99%

“…Uchikawa et al [18] considered that the set mechanism was related (0 both ettringite formation and alite hydration. They stated that differences in the amount and the morphology of ettringite formed resulted in different set times, especially for the case of well burnt clinker.…”

Section: Role Of Caso In Cement Paste Hydrationmentioning

confidence: 99%

“…Time (hrs) 18 24 ., rn Table 7.1-5 shows the same calculations of the charge balance as Table 7.1-3 for the paste SM. This analysis of polymer anion seems to be also applicable to the melamine sulfonate superplasticizer.…”

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confidence: 99%

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Chemical Admixtures of Highway Concrete: Fundamental Research and a Guide to Usage, Part II - Quantitative Analysis of Interactions between Portland Cements and Superplasticizers

Diamond¹,

Matsukawa²

1993

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“…Time (hrs) 18 24 For the anions, the sol-ion concentration was initially at 120 meq/L. It gradually decreased to a plateau level at around 100 meq/L; subsequently it slightly increased.…”

Section: A Methods Of Incorporatin G Organic Ions Into the Charge Balamentioning

confidence: 99%

Section: Role Of Caso In Cement Paste Hydrationmentioning

confidence: 99%

Section: Role Of Caso In Cement Paste Hydrationmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Chemical Admixtures of Highway Concrete: Fundamental Research and a Guide to Usage, Part II - Quantitative Analysis of Interactions between Portland Cements and Superplasticizers

Diamond¹,

Matsukawa²

1993

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“…Before hydration occurs, cement paste behaves like a Bingham fluid with yield values between 500 and 1000 Pa [3,4] …”

Section: Introductionmentioning

confidence: 99%

Early chemical shrinkage due to dissolution and hydration of cement

Beltzung

Wittmann

2001

Mat. Struct.

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RtSUMtNew investigations into very early volume change of aqueous cement dispersions allow us to understand better what is meant by the general term "chemical shrinkage". In fact, early chemical shrinkage should be subdivided into dissolution shrinkage and hydration shrinkage, the latter taking place before as well as after the induction period. Shrinkage is evaluated by picnometry and by linear measurements carried out in three directions by means of an experimental set-up specially built to measure endogenous shrinkage right 8om the time after mixing. As expected, the volume of dissolved cement is a function of w/c-ratio, whereas the volume of early hydrated cement is independent of w/c-ratio. This relation is linear and the slope as well as the intersection of the straight line with the ordinate vary depending on the cement composition. Therefore, these values may be considered to be indicating characteristic cement properties. In this way it becomes possible to classify cements and to predict the extent of early chemical shrinkage of mortar and concrete by just knowing their w/c-ratio.

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Effect of false set related anomalies on rheological properties of cement paste mixtures in the presence of high range water reducing admixture

Mardani‐Aghabaglou

Felekoğlu

Ramyar

2020

Structural Concrete

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There are many studies related to the fresh state properties of the cementitious systems in the literature. However, there is no specific study about the effects of false set formation on fresh state properties of these systems. In this study, the effect of false set formation on fresh state and rheological properties of the cement paste mixtures containing high range water reducing (HRWR) admixture was investigated experimentally. For this aim, two different commercial CEMI 42.5 R. type cements produced by different companies were used. In order to investigate the effect of false set formation related anomalies on fresh state properties, paste mixtures were prepared with different mixing times. In the mixtures where false set related anomaly was the case, rheological properties were positively affected by prolonging the mixing time.

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Influence of CaSO4·2H2O, CaSO4·12H2O and CaSO4 on the initial hydration of clinker having different burning degree

Cited by 38 publications

References 4 publications

Chemical Admixtures of Highway Concrete: Fundamental Research and a Guide to Usage, Part II - Quantitative Analysis of Interactions between Portland Cements and Superplasticizers

Chemical Admixtures of Highway Concrete: Fundamental Research and a Guide to Usage, Part II - Quantitative Analysis of Interactions between Portland Cements and Superplasticizers

Early chemical shrinkage due to dissolution and hydration of cement

Effect of false set related anomalies on rheological properties of cement paste mixtures in the presence of high range water reducing admixture

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