Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dispersing performance of different kinds of polycarboxylate (PCE) superplasticizers in cement blended with a calcined clay
https://orcid.org/0000-0002-4129-4784
Graphical abstract Display Omitted
Highlights A calcined clay (CC) rich in meta illite and smectite was used as SCM. CC increased the water demand of the composite cements considerably. At 50% clinker substitution, PCE dosages increased by ~100% compared to OPC. Methallyl ether (HPEG)-based PCEs were found most effective in both cement and CC. Adsorption measurements suggest PCE interaction with OPC stronger than with CC.
Abstract This study investigates the dispersing effectiveness of purposely selected methacrylate ester (MPEG), isoprenol ether (IPEG) and methallyl ether (HPEG) based polycarboxylate (PCE) superplasticizers of different molecular structures in cements blended with 0–50 wt% of a calcined clay (CC) rich in meta illite–smectite. It was found that the water demand of the composite cements increases lineraly with the rate of clinker substitution, and that PCE dosages also increase proportionally with the amount of CC, namely approximately doubled at 50% clinker substitution. Among the PCEs, HPEG polymers proved most effective while MPEG and especially IPEG PCEs required higher dosages.
Dispersing performance of different kinds of polycarboxylate (PCE) superplasticizers in cement blended with a calcined clay
https://orcid.org/0000-0002-4129-4784
Graphical abstract Display Omitted
Highlights A calcined clay (CC) rich in meta illite and smectite was used as SCM. CC increased the water demand of the composite cements considerably. At 50% clinker substitution, PCE dosages increased by ~100% compared to OPC. Methallyl ether (HPEG)-based PCEs were found most effective in both cement and CC. Adsorption measurements suggest PCE interaction with OPC stronger than with CC.
Abstract This study investigates the dispersing effectiveness of purposely selected methacrylate ester (MPEG), isoprenol ether (IPEG) and methallyl ether (HPEG) based polycarboxylate (PCE) superplasticizers of different molecular structures in cements blended with 0–50 wt% of a calcined clay (CC) rich in meta illite–smectite. It was found that the water demand of the composite cements increases lineraly with the rate of clinker substitution, and that PCE dosages also increase proportionally with the amount of CC, namely approximately doubled at 50% clinker substitution. Among the PCEs, HPEG polymers proved most effective while MPEG and especially IPEG PCEs required higher dosages.
Dispersing performance of different kinds of polycarboxylate (PCE) superplasticizers in cement blended with a calcined clay
https://orcid.org/0000-0002-4129-4784
Graphical abstract Display Omitted
Highlights A calcined clay (CC) rich in meta illite and smectite was used as SCM. CC increased the water demand of the composite cements considerably. At 50% clinker substitution, PCE dosages increased by ~100% compared to OPC. Methallyl ether (HPEG)-based PCEs were found most effective in both cement and CC. Adsorption measurements suggest PCE interaction with OPC stronger than with CC.
Abstract This study investigates the dispersing effectiveness of purposely selected methacrylate ester (MPEG), isoprenol ether (IPEG) and methallyl ether (HPEG) based polycarboxylate (PCE) superplasticizers of different molecular structures in cements blended with 0–50 wt% of a calcined clay (CC) rich in meta illite–smectite. It was found that the water demand of the composite cements increases lineraly with the rate of clinker substitution, and that PCE dosages also increase proportionally with the amount of CC, namely approximately doubled at 50% clinker substitution. Among the PCEs, HPEG polymers proved most effective while MPEG and especially IPEG PCEs required higher dosages.
Dispersing performance of different kinds of polycarboxylate (PCE) superplasticizers in cement blended with a calcined clay
Schmid, Marlene (Autor:in) / Plank, Johann (Autor:in)
13.05.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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