Properties of cement systems possessing cross-linked superplasticizers
ACI Materials Journal, cilt.118, sa.5, ss.83-91, 2021 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 118 Sayı: 5
- Basım Tarihi: 2021
- Doi Numarası: 10.14359/51732931
- Dergi Adı: ACI Materials Journal
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Computer & Applied Sciences, Metadex, DIALNET, Civil Engineering Abstracts
- Sayfa Sayıları: ss.83-91
- Anahtar Kelimeler: Cross-link, Polycarboxylate, Rheology, Strength
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
Cross-linked polycarboxylates were synthesized and characterized with Fourier-transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and thermogravimetric analysis (TGA). A comparative investigation of the mechanism behind the relationship between the molecular structure and performance (in terms of rheology, workability retention, and compressive strength) is the novelty of this research. Presence of cross-linkages in polymer structure provided high workability and workability-retaining ability to cement pastes. A moderate cross-link density was determined as an important factor for cement dispersion (cross-link/side chain/main chain units molar ratios are 0.2/0.8/10). On the other hand, compressive strengths of designed concretes were significantly affected from the structure of superplasticizers-namely, highly cross-linked polymer provided better compressive strength (73.5 MPa and 72.5% strength increment to the basis of plain concrete). Finally, it was thought that cross-linked polycarboxylate-type superplasticizers could be the functional alternatives of their traditional counterparts, especially for the applications which required more workability and workability retention.