Calcium nitrate counteracting PCE superplasticizer retardation

Karel Lesage; Özlem Cizer; Geert De Schutter; Bram Desmet; John Vantomme; Lucie Vandewalle

Calcium nitrate counteracting PCE superplasticizer retardation

Karel Lesage, Özlem Cizer, Geert De Schutter, Bram Desmet, John Vantomme, Lucie Vandewalle

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Calcium nitrate (CN) has been used as a cement hydration accelerator in varying dosages in order to explore its potential to compensate hydration retardation caused by a polycarboxylic ether (PCE) superplasticizer. The initial setting time, obtained from Vicat needle penetration tests, was found to decrease for increasing CN dosage until 4 percent of the cement mass was added. For dosages beyond this amount, the initial setting time slightly increased. The detected alite and aluminate hydration products appeared to have an influence on the structure evolution during setting. It is assumed that the AFt needles destruct the C-S-H network, which could lead to lower needle penetration resistance.

Original language	English
Title of host publication	10th International Conference on Superplasticizers and Other Chemical Admixtures 2012
Pages	89-101
Number of pages	13
Edition	288 SP
Publication status	Published - 2012
Event	10th International Conference on Superplasticizers and Other Chemical Admixtures 2012 - Prague, Czech Republic Duration: 28 Oct 2012 → 31 Oct 2012

Publication series

Name	American Concrete Institute, ACI Special Publication
Number	288 SP
ISSN (Print)	0193-2527

Conference

Conference	10th International Conference on Superplasticizers and Other Chemical Admixtures 2012
Country/Territory	Czech Republic
City	Prague
Period	28/10/12 → 31/10/12

Keywords

Calcium nitrate
Hydration accelerations
Superplasticizer retardation

Cite this

@inproceedings{6f00114aaa384edebb968c206ca36b1a,

title = "Calcium nitrate counteracting PCE superplasticizer retardation",

abstract = "Calcium nitrate (CN) has been used as a cement hydration accelerator in varying dosages in order to explore its potential to compensate hydration retardation caused by a polycarboxylic ether (PCE) superplasticizer. The initial setting time, obtained from Vicat needle penetration tests, was found to decrease for increasing CN dosage until 4 percent of the cement mass was added. For dosages beyond this amount, the initial setting time slightly increased. The detected alite and aluminate hydration products appeared to have an influence on the structure evolution during setting. It is assumed that the AFt needles destruct the C-S-H network, which could lead to lower needle penetration resistance.",

keywords = "Calcium nitrate, Hydration accelerations, Superplasticizer retardation",

author = "Karel Lesage and {\"O}zlem Cizer and \{De Schutter\}, Geert and Bram Desmet and John Vantomme and Lucie Vandewalle",

year = "2012",

language = "English",

isbn = "9781622766406",

series = "American Concrete Institute, ACI Special Publication",

number = "288 SP",

pages = "89--101",

booktitle = "10th International Conference on Superplasticizers and Other Chemical Admixtures 2012",

edition = "288 SP",

note = "10th International Conference on Superplasticizers and Other Chemical Admixtures 2012 ; Conference date: 28-10-2012 Through 31-10-2012",

}

Lesage, K, Cizer, Ö, De Schutter, G, Desmet, B, Vantomme, J & Vandewalle, L 2012, Calcium nitrate counteracting PCE superplasticizer retardation. in 10th International Conference on Superplasticizers and Other Chemical Admixtures 2012. 288 SP edn, American Concrete Institute, ACI Special Publication, no. 288 SP, pp. 89-101, 10th International Conference on Superplasticizers and Other Chemical Admixtures 2012, Prague, Czech Republic, 28/10/12.

Calcium nitrate counteracting PCE superplasticizer retardation. / Lesage, Karel; Cizer, Özlem; De Schutter, Geert et al.
10th International Conference on Superplasticizers and Other Chemical Admixtures 2012. 288 SP. ed. 2012. p. 89-101 (American Concrete Institute, ACI Special Publication; No. 288 SP).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Calcium nitrate counteracting PCE superplasticizer retardation

AU - Lesage, Karel

AU - Cizer, Özlem

AU - De Schutter, Geert

AU - Desmet, Bram

AU - Vantomme, John

AU - Vandewalle, Lucie

PY - 2012

Y1 - 2012

N2 - Calcium nitrate (CN) has been used as a cement hydration accelerator in varying dosages in order to explore its potential to compensate hydration retardation caused by a polycarboxylic ether (PCE) superplasticizer. The initial setting time, obtained from Vicat needle penetration tests, was found to decrease for increasing CN dosage until 4 percent of the cement mass was added. For dosages beyond this amount, the initial setting time slightly increased. The detected alite and aluminate hydration products appeared to have an influence on the structure evolution during setting. It is assumed that the AFt needles destruct the C-S-H network, which could lead to lower needle penetration resistance.

AB - Calcium nitrate (CN) has been used as a cement hydration accelerator in varying dosages in order to explore its potential to compensate hydration retardation caused by a polycarboxylic ether (PCE) superplasticizer. The initial setting time, obtained from Vicat needle penetration tests, was found to decrease for increasing CN dosage until 4 percent of the cement mass was added. For dosages beyond this amount, the initial setting time slightly increased. The detected alite and aluminate hydration products appeared to have an influence on the structure evolution during setting. It is assumed that the AFt needles destruct the C-S-H network, which could lead to lower needle penetration resistance.

KW - Calcium nitrate

KW - Hydration accelerations

KW - Superplasticizer retardation

UR - https://www.scopus.com/pages/publications/84875734974

M3 - Conference contribution

AN - SCOPUS:84875734974

SN - 9781622766406

T3 - American Concrete Institute, ACI Special Publication

SP - 89

EP - 101

BT - 10th International Conference on Superplasticizers and Other Chemical Admixtures 2012

T2 - 10th International Conference on Superplasticizers and Other Chemical Admixtures 2012

Y2 - 28 October 2012 through 31 October 2012

ER -

Calcium nitrate counteracting PCE superplasticizer retardation

Abstract

Publication series

Conference

Keywords

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