Comparative study on the environmental impact of Portland cement paste that mixed with naphthalene or carboxylate based polymer solutions

• Published in: Journal of molecular liquids 2023-12, Vol.392, p.123164, Article 123164
• Main Authors: El-Gindy, Asmaa A., El-Tonsy, Maher M., Abdelkader, Hamid I., Mohsen, Alaa, Habib, Amr O., Gomaa, Esam A.
• Format: Article
• Language: English
• Subjects: Compressive strength; Density; Porosity; Portland cement; Skimanet; ViscoCrete
• ISSN: 0167-7322
• DOI: 10.1016/j.molliq.2023.123164

The Figure abstract is given here explaining the main processes as: 1- Molding process. including preparation of cube samples by molding 0.2- Remolded cubles,take out from the molds after curing.3-Stop reaction at 28 day,leaving in oven at constant temperature 80 °C for 24 h to stop hydration reaction. 5- UV effect in closed cupboard 5-Compressive strength measurements. [Display omitted] •Two types of polymers were applied to protect the concrete mixture from negative effects on the cement structure.•The effect of solar UV radiation on cement samples was studied and found it is limited and enclosed to surface thin layers.•Porosity, density, total dissolved solids, X-ray diffraction and EDX were carried out on cement samples before and after soaking in water for cement and mixed cement plus polymer samples.•Adding two types of polymers Sikament and Viscocrete separately to cement protect concrete construction against serious environmental impacts. The environmental impact is now a valuable coefficient for any human activity. The effect of solar UV radiation on the cement samples was limited and contained in the thin surface layer of the samples. In general, viscocrete was the most effective in protecting cement against solar ultraviolet radiation, where cement samples treated with the two polymers used separately showed greater compressive strength values than those recorded for samples treated with sikament polymer. This study is important since the mechanical properties of cement and concrete at early stages are important in the field of civil engineering. The effect of soaking in water on the ability of the cement to withstand the pressure on it was also studied, and several physical measurements were applied to samples of untreated cement and samples mixed with the mentioned polymers. These measurements included measuring the porosity, density, and total dissolved solids by X-ray diffraction, FTIR, and line scan EDX. These measurements were carried out on cement samples before, after, after soaking in water, as well as on cement samples mixed with polymers. The measurements were extended to the soaking water. So, adding two types of polymers (Sikament and Viscocrete) separately to cement could protect concrete constructions against serious environmental impacts. The EDX analysis of the samples used in this study showed that the Egyptian sources of raw materials used in the cement industry are rich sources of rare chemical elements. The importance of add