Elementary characterization of samples of Portland cement, natural gypsum and phosphogypsum mortars from Brazil
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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Proteção Radiológica - SBPR
2019
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| _version_ | 1876438120463859712 |
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| author | Danielle Cristine Narloch |
| author_facet | Danielle Cristine Narloch |
| contents | Elementary characterization of samples of Portland cement, natural gypsum and phosphogypsum mortars from Brazil Danielle Cristine Narloch Sergei Anatolyevich Paschuk Janine Nicolosi Corrêa Catarina Alzira Montenegro Peddis Torres Alessandro Luiz de Lara Juliana Machado Casali Wellington Mazer Gustavo Macioski Allan Felipe Nunes Perna Biología gypsum phosphogypsum Portland cement ray fluorescence construction materials Portland cement, the basic ingredient of concrete and is manufactured by crushing, milling and proportioning limestone, sand, clay, iron ore and secondary materials such as shells, chalk or marl combined with shale slate or blast furnace slag, fly ash, gypsum, phosphogypsum, and some others. Evaluating the physical and mineralogical characteristics of the cement and its chemical composition is essential to establish the quality of the product. Therefore, the objective of this work is to characterize and quantify the most common chemical elements in the samples of Brazilian Portland cement, natural gypsum, and phosphogypsum mortars by means of Energy Dispersive X-ray Fluorescence Spectroscopy (EDXRF), as well as to evaluate the compressive strength of these mortars. For analysis of the compressive strength, initially prepared samples were submitted to a destructive mechanical test. Subsequently samples were milled and compacted to form thin tablets, which were submitted to the EDXRF analysis. The qualitative and semi-quantitative analyzes showed that for phosphogypsum mortar the largest mass fractions were found of 49.8±2.5% (Si), 24.66±0.96% (S) and 22.10±0.42% (Ca). For gypsum mortar those values were found of 43.41±0.45% (Ca), 33.8 ± 0.8% (S) and 18.9±1.2% (Si), respectively; and for Portland cement mortar, the predominant elements in those samples have the mass fractions of 64.20±0.52% (Ca) and 27.3±1.5% (Si). The results showed that obtained values of mass fraction of the elements Si, S, K, Ca, Ti, Fe are in rather good agreement with quantities indicated for manufacture. Besides, gypsum and phosphogypsum presented almost the same composition and compressive strength. 2019 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280838033 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.7 |
| format | Artículo científico |
| id | redalyc_722280838033 |
| institution | Redalyc |
| language | en |
| publishDate | 2019 |
| publisher | Sociedade Brasileira de Proteção Radiológica - SBPR |
| spellingShingle | Elementary characterization of samples of Portland cement, natural gypsum and phosphogypsum mortars from Brazil Danielle Cristine Narloch Biología gypsum phosphogypsum Portland cement ray fluorescence construction materials Elementary characterization of samples of Portland cement, natural gypsum and phosphogypsum mortars from Brazil Danielle Cristine Narloch Sergei Anatolyevich Paschuk Janine Nicolosi Corrêa Catarina Alzira Montenegro Peddis Torres Alessandro Luiz de Lara Juliana Machado Casali Wellington Mazer Gustavo Macioski Allan Felipe Nunes Perna Biología gypsum phosphogypsum Portland cement ray fluorescence construction materials Portland cement, the basic ingredient of concrete and is manufactured by crushing, milling and proportioning limestone, sand, clay, iron ore and secondary materials such as shells, chalk or marl combined with shale slate or blast furnace slag, fly ash, gypsum, phosphogypsum, and some others. Evaluating the physical and mineralogical characteristics of the cement and its chemical composition is essential to establish the quality of the product. Therefore, the objective of this work is to characterize and quantify the most common chemical elements in the samples of Brazilian Portland cement, natural gypsum, and phosphogypsum mortars by means of Energy Dispersive X-ray Fluorescence Spectroscopy (EDXRF), as well as to evaluate the compressive strength of these mortars. For analysis of the compressive strength, initially prepared samples were submitted to a destructive mechanical test. Subsequently samples were milled and compacted to form thin tablets, which were submitted to the EDXRF analysis. The qualitative and semi-quantitative analyzes showed that for phosphogypsum mortar the largest mass fractions were found of 49.8±2.5% (Si), 24.66±0.96% (S) and 22.10±0.42% (Ca). For gypsum mortar those values were found of 43.41±0.45% (Ca), 33.8 ± 0.8% (S) and 18.9±1.2% (Si), respectively; and for Portland cement mortar, the predominant elements in those samples have the mass fractions of 64.20±0.52% (Ca) and 27.3±1.5% (Si). The results showed that obtained values of mass fraction of the elements Si, S, K, Ca, Ti, Fe are in rather good agreement with quantities indicated for manufacture. Besides, gypsum and phosphogypsum presented almost the same composition and compressive strength. 2019 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280838033 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.7 |
| title | Elementary characterization of samples of Portland cement, natural gypsum and phosphogypsum mortars from Brazil |
| topic | Biología gypsum phosphogypsum Portland cement ray fluorescence construction materials |
| url | https://www.redalyc.org/articulo.oa?id=722280838033 |