Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Adsorption behavior of PNS superplasticizer and its relation to fluidity of cement paste
The adsorption behavior of a polynaphthalenesulfonate (PNS) superplasticizer and its relation to the fluidity of cement paste has been investigated for six cements at a given dosage of PNS superplasticizer. The results show that incompatible cements have a higher adsorption capacity of PNS superplasticizer because of a lack of soluble alkali sulfates. There is an inverse relationship between the amount of PNS adsorbed and the mini-slump area value of the cement pastes at 30 min, that is, the higher the amount of PNS adsorbed, the lower the initial slump value, and the higher the slump loss. The addition of some Na2SO4 contributes to increase the slump area by reducing the amount of PNS adsorbed. Moreover, it has been found that additional calcium sulfate does not prevent the adsorption of PNS on cement particles as sodium sulfate does in cement pastes having W/C = 0.35. The contribution of alkali sulfate on dispersing mechanism of PNS superplasticized cement pastes is explained in relation with initial slump and its loss.
Adsorption behavior of PNS superplasticizer and its relation to fluidity of cement paste
The adsorption behavior of a polynaphthalenesulfonate (PNS) superplasticizer and its relation to the fluidity of cement paste has been investigated for six cements at a given dosage of PNS superplasticizer. The results show that incompatible cements have a higher adsorption capacity of PNS superplasticizer because of a lack of soluble alkali sulfates. There is an inverse relationship between the amount of PNS adsorbed and the mini-slump area value of the cement pastes at 30 min, that is, the higher the amount of PNS adsorbed, the lower the initial slump value, and the higher the slump loss. The addition of some Na2SO4 contributes to increase the slump area by reducing the amount of PNS adsorbed. Moreover, it has been found that additional calcium sulfate does not prevent the adsorption of PNS on cement particles as sodium sulfate does in cement pastes having W/C = 0.35. The contribution of alkali sulfate on dispersing mechanism of PNS superplasticized cement pastes is explained in relation with initial slump and its loss.
Adsorption behavior of PNS superplasticizer and its relation to fluidity of cement paste
Kim, Byung-Gi (Autor:in) / Jiang, Shiping (Autor:in) / Jolicoeur, C. (Autor:in) / Aitcin, P.C. (Autor:in)
Cement and Concrete Research ; 30 ; 887-893
2000
7 Seiten, 20 Quellen
Aufsatz (Zeitschrift)
Englisch
The adsorption behavior of PNS superplasticizer and its relation to fluidity of cement paste
| British Library Online Contents | 2000
The adsorption behavior of PNS superplasticizer and its relation to fluidity of cement paste
| Online Contents | 2000
The fluidity of fly ash-cement paste containing naphthalene sulfonate superplasticizer
| Online Contents | 2004
The fluidity of fly ash-cement paste containing naphthalene sulfonate superplasticizer
| British Library Online Contents | 2004