Analysis of Additives in Gypsum Coatings Based on Melamine, Polycarbonate Salts, Polycarboxylate, and Polycarboxylic Acids
| Autor: | Joaquín Julian Pastor Pérez, José Antonio Flores Yepes, Ana María Codes Alcaraz, Antonio Martínez Gabarrón, Luis Miguel Serna Jara |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Gypsum polycarboxylic acids engineering.material chemistry.chemical_compound Flexural strength melamine synthetic polymers of melamine Materials Chemistry Polycarbonate chemistry.chemical_classification Surfaces and Interfaces Polymer polycarbonate salts citric acid Engineering (General). Civil engineering (General) Hardness gypsum Surfaces Coatings and Films Compressive strength chemistry Chemical engineering polycarboxylates visual_art visual_art.visual_art_medium engineering TA1-2040 Citric acid Melamine |
| Zdroj: | Coatings Volume 11 Issue 10 Coatings, Vol 11, Iss 1204, p 1204 (2021) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11101204 |
| Popis: | In this paper, we evaluate different gypsum coating additives that are available on the market, which are categorized by their chemical bases. The results will serve as a reference for future investigations of new additive bases in order to improve the properties of gypsum. As such, the objective of the this study is to assess the workability, mechanical behavior, and crystalline structure of calcium sulfate combined with different retarding and fluidifying bases, including melamine bases, which have a compressive strength of 19.32 N/mm2 and handling times with polycarbonate salts of up to 117.58 min. The following study presents the results of standard mechanical tests, analyzing semi-hydrated calcium sulfate (without additives) as a reference, along with the addition of melamines, synthetic melanin polymers, polycarbonate salts, polycarboxylates, and a polycarboxylic acid (citric acid). We already know that the addition of these additives will modify the mechanical properties of calcium sulfate, such as the Shore C surface hardness, flexural strength, modulus of elasticity, and compression resistance, which is the object of this study. |
| Databáze: | OpenAIRE |
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