Influence of Cellulose Ethers on the Carbonation Behavior of Cement Pastes: Fid-Bau Portal

Fachinformationsdienst BAUdigital

Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik

Influence of Cellulose Ethers on the Carbonation Behavior of Cement Pastes

Zhi, Fangfang / Tang, Xiaodan / Wang, Liang / Bai, Zhipeng / Na, Binbin / Zhang, Lei / Yang, Guohui / Jiang, Linhua

Cellulose ethers (CE) are generally used in cement-based materials as viscosity modifying admixtures. However, previous investigations scarcely focused on the effect of CE on the carbonation behavior of host materials. This work studied the effect of CE on the carbonation behavior of cement pastes. The carbonation resistance of samples was determined using the carbonation depth and pH values. The changes in hydration products and microstructure of host materials were monitored to reveal the underlying mechanisms using electrochemical impedance spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, scanning electron microscopy, and mercury intrusion porosimetry. The results indicate that CE decrease the portlandite (CH) content and inhibit the growth of CH crystal with a smaller size and eroded edges, thus increasing its reactivity with ${CO}_{2}$ during carbonation. CE increase the porosity and coarsen the pore structure because of the air-entrainment effect in cement pastes, promoting the ${CO}_{2}$ diffusion in the system. As a result, CE decrease the carbonation resistance of cement pastes with increasing the CE content.

Zugriff

Zugriff prüfen

Verfügbarkeit in meiner Bibliothek prüfen

Bestellung bei Subito €

Seitennavigation

Dokumentinformationen

Ähnliche Titel

Exportieren, teilen und zitieren

Influence of Cellulose Ethers on the Carbonation Behavior of Cement Pastes

Zhi, Fangfang / Tang, Xiaodan / Wang, Liang / Bai, Zhipeng / Na, Binbin / Zhang, Lei / Yang, Guohui / Jiang, Linhua

Cellulose ethers (CE) are generally used in cement-based materials as viscosity modifying admixtures. However, previous investigations scarcely focused on the effect of CE on the carbonation behavior of host materials. This work studied the effect of CE on the carbonation behavior of cement pastes. The carbonation resistance of samples was determined using the carbonation depth and pH values. The changes in hydration products and microstructure of host materials were monitored to reveal the underlying mechanisms using electrochemical impedance spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, scanning electron microscopy, and mercury intrusion porosimetry. The results indicate that CE decrease the portlandite (CH) content and inhibit the growth of CH crystal with a smaller size and eroded edges, thus increasing its reactivity with ${CO}_{2}$ during carbonation. CE increase the porosity and coarsen the pore structure because of the air-entrainment effect in cement pastes, promoting the ${CO}_{2}$ diffusion in the system. As a result, CE decrease the carbonation resistance of cement pastes with increasing the CE content.

Influence of Cellulose Ethers on the Carbonation Behavior of Cement Pastes

Zhi, Fangfang / Tang, Xiaodan / Wang, Liang / Bai, Zhipeng / Na, Binbin / Zhang, Lei / Yang, Guohui / Jiang, Linhua

Cellulose ethers (CE) are generally used in cement-based materials as viscosity modifying admixtures. However, previous investigations scarcely focused on the effect of CE on the carbonation behavior of host materials. This work studied the effect of CE on the carbonation behavior of cement pastes. The carbonation resistance of samples was determined using the carbonation depth and pH values. The changes in hydration products and microstructure of host materials were monitored to reveal the underlying mechanisms using electrochemical impedance spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, scanning electron microscopy, and mercury intrusion porosimetry. The results indicate that CE decrease the portlandite (CH) content and inhibit the growth of CH crystal with a smaller size and eroded edges, thus increasing its reactivity with ${CO}_{2}$ during carbonation. CE increase the porosity and coarsen the pore structure because of the air-entrainment effect in cement pastes, promoting the ${CO}_{2}$ diffusion in the system. As a result, CE decrease the carbonation resistance of cement pastes with increasing the CE content.

Zugriff

Zugriff prüfen

Verfügbarkeit in meiner Bibliothek prüfen

Bestellung bei Subito €

Seitennavigation

Dokumentinformationen

Ähnliche Titel

Exportieren, teilen und zitieren

Dokumentinformationen

Titel:

Influence of Cellulose Ethers on the Carbonation Behavior of Cement Pastes

Weitere Titelangaben:

J. Mater. Civ. Eng.

Beteiligte:

Zhi, Fangfang (Autor:in) / Tang, Xiaodan (Autor:in) / Wang, Liang (Autor:in) / Bai, Zhipeng (Autor:in) / Na, Binbin (Autor:in) / Zhang, Lei (Autor:in) / Yang, Guohui (Autor:in) / Jiang, Linhua (Autor:in)

Erschienen in:

Journal of Materials in Civil Engineering ; 37

Erscheinungsdatum:

01.05.2025

ISSN:

1943-5533 , 0899-1561

DOI:

https://doi.org/10.1061/JMCEE7.MTENG-19121

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

Cellulose ethers (CE) , Carbonation , Microstructure , Electrochemistry , Cement

Ähnliche Titel

Cellulose ethers and yield stress of cement pastes

Brumaud, Coralie / Baumann, Robert / Schmitz, Marc et al. | Tema Archiv | 2014

Cellulose ethers and yield stress of cement pastes

Brumaud, C. / Baumann, R. / Schmitz, M. et al. | British Library Online Contents | 2014

Cellulose ethers and yield stress of cement pastes

Brumaud, Coralie | Online Contents | 2014

Carbonation of hardened cement pastes: Influence of temperature

Drouet, Emeline / Poyet, Stéphane / Le Bescop, Patrick et al. | British Library Online Contents | 2019

Carbonation of hardened cement pastes: Influence of temperature

Drouet, Emeline / Poyet, Stéphane / Le Bescop, Patrick et al. | British Library Online Contents | 2019