Szczegóły publikacji
Opis bibliograficzny
Pore structure of polymer-modified dry mix tile adhesive mortars / M. Kupiński, Ł. KOTWICA // W: ICCC 2023 [Dokument elektroniczny] : further reduction of CO2 - emissions and circularity in the cement and concrete industry : 16th International Congress on the Chemistry of Cement 2023 : September 18–22, 2023, Bangkok, [Thailand] : congress proceeding , Vol. 3 . — Wersja do Windows. — Dane tekstowe. — [Bangkok] : Thailand Concrete Association, [2023]. — S. 101–104. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: https://www.iccc-online.org/fileadmin/gruppen/iccc/proceeding... [2023-12-29]. — Bibliogr. s. 104, Abstr. — M. Kupiński - afiliacja: Henkel Polska Sp. z o. o., Stąporków
Autorzy (2)
- Kupiński Marcin
- AGHKotwica Łukasz
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 151116 |
|---|---|
| Data dodania do BaDAP | 2024-01-12 |
| Rok publikacji | 2023 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Creative Commons |
Abstract
Organic admixtures are used to alter the properties of cementitious mortars' properties. As they usually are or contain surfactants, a large number of air bubbles can be introduced, having a major impact on the mix performance in the fresh as well as in the hardened state. The air entraining and stabilization process can be influenced by a variety of factors, such as the pH of the pore solution, the presence of certain ions in the solution, surface charges on the grains of cement, or interference of different additives present in the mix. Thus, designing the pore structure and resulting properties of the mortar creates a significant technological challenge. In this paper, we are focusing on the combined air-entraining action of methylcellulose and redispersible polymer powder (copolymer of vinyl acetate and ethylene) on the mortars based on Portland Cement (PC), and binary blend of Calcium Sulfoaluminate Cement (CSA) and Calcium Sulfate (C$).An attempt to determine the pore structure of fresh mix was made, using the Air Void Analyzer (AVA), yet it failed due to the gelation of cellulose ether in contact with the air-release liquid (glycerin) necessary in this technique. Instead, the porosity of the hardened mortars was quantified by image analysis of the high-resolution scans of the samples. Significant differences in the introduced air pore size distribution were found, depending on the binder system used. The porosity of CSA-based mortars is finer than those of OPC-based mortars. Such materials also show a higher content of pores below 300 μm of equivalent diameter. The reasons behind such behavior remain unclear, which proves the high complexity of the topic.
