The influence of the addition of three commercially available superplasticizers employed for maximising the solid loading of Portland cement pastes has been investigated. Cement pastes were prepared form deionized water and a commercial ordinary Portland cement 32.5 R. Cement and water were mixed with a vane stiffer according to ASTM Standard C305. The water/cement ratio was kept fixed to 0.32. The superplasticizers tested are based on mixtures of synthetic polyfunctional polymers (Fluiment 40), on highly-branched polymers containing specific functional groups (Fluiment SAE 25), and on polycyclic, copolymers with modified structures carrying hydroxylated side chains (Concretan RX). Rheological tests were performed at 25°C with the rate controlled coaial cylinder viscometer Rotovisko Haake 20, system M5-osc., measuring device MV2P with serrated surfaces. The tests were performed under both continuous and oscillatory flow conditions.

OPTIMIZATION OF PORTLAND CEMENT PASTES

PAPO, Adriano;
2005-01-01

Abstract

The influence of the addition of three commercially available superplasticizers employed for maximising the solid loading of Portland cement pastes has been investigated. Cement pastes were prepared form deionized water and a commercial ordinary Portland cement 32.5 R. Cement and water were mixed with a vane stiffer according to ASTM Standard C305. The water/cement ratio was kept fixed to 0.32. The superplasticizers tested are based on mixtures of synthetic polyfunctional polymers (Fluiment 40), on highly-branched polymers containing specific functional groups (Fluiment SAE 25), and on polycyclic, copolymers with modified structures carrying hydroxylated side chains (Concretan RX). Rheological tests were performed at 25°C with the rate controlled coaial cylinder viscometer Rotovisko Haake 20, system M5-osc., measuring device MV2P with serrated surfaces. The tests were performed under both continuous and oscillatory flow conditions.
File in questo prodotto:
File Dimensione Formato  
SilInd70_001.pdf

non disponibili

Tipologia: Altro materiale allegato
Licenza: Non pubblico
Dimensione 449.91 kB
Formato Adobe PDF
449.91 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11390/694822
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 2
social impact