Role of Anionic Group of Methylallyl Ether-Based PCEs on Behavior of Cementitious Systems with Various C3A Contents
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Asce-Amer Soc Civil Engineers
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the performances of methylallyl ether (HPEG) type polycarboxylate ether-based water reducing admixtures (PCE) partially substituted with phosphate and sulfonate anionic groups were investigated. The effects of synthesized PCE's on the fresh, rheological, and some hardened properties of mixtures prepared with cements having different C(3)A contents were examined. Increasing the phosphate and sulfonate substitution ratio of PCE up to a certain value improved the rheological properties of the mixtures. Best flow retention and rheological properties were obtained with 9% phosphate (P9) and 7% sulfonate (S7) PCEs. Due to the high PCE dosage used in the Marsh-funnel and mini slump experiments, the nonadsorbed PCE in the pore solution blocked the adsorbed polymers on the cement particles. Also, the hydrodynamic radius of the polymer had a significant effect on the adsorption and dispersion performance of PCE. Morover, with the increase of cement C(3)A content, the fresh properties of the mixtures were adversely affected. However, the increase in C(3)A content up to a certain value improved the hardened properties of the cementitious system. (c) 2024 American Society of Civil Engineers.
Açıklama
Anahtar Kelimeler
Polycarboxylate Ether (Pce), Adsorption, Anionic Groups, Rheology, Cement-Admixture Compatibility, C(3)A
Kaynak
Journal of Materials In Civil Engineering
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
36
Sayı
7
