A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran
The quality of concrete is highly dependent on the characteristics of its aggregate, such as the size, minerals, and their chemical properties. Even a small amount of impurities, such as hydrated sulfates, chlorine (salt), and acidic pH of the rock material, can adversely affect the quality of the c...
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| Format: | Article |
| Language: | English |
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University of Tehran
2016-06-01
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| Series: | International Journal of Mining and Geo-Engineering |
| Subjects: | |
| Online Access: | http://ijmge.ut.ac.ir/article_57305_e98e3c632bdf1f9a8e4f63799b37853a.pdf |
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| author | Behzad Tokhmechi Seyed Fazlolah Saghravani Parham Janfeshan Araghi Hosein Marvi Mohamad Esmaeel Borhani Abolfazl Darbani |
| author_facet | Behzad Tokhmechi Seyed Fazlolah Saghravani Parham Janfeshan Araghi Hosein Marvi Mohamad Esmaeel Borhani Abolfazl Darbani |
| author_sort | Behzad Tokhmechi |
| collection | DOAJ |
| description | The quality of concrete is highly dependent on the characteristics of its aggregate, such as the size, minerals, and their chemical properties. Even a small amount of impurities, such as hydrated sulfates, chlorine (salt), and acidic pH of the rock material, can adversely affect the quality of the concrete. Thus, many national codes and standards are developed for testing, selecting, and employing the rock materials in concrete. For instance, Iranian standards 446, 449, 1702, 4978, 4984, 7174, and 86721 are currently serving this purpose. In the present research, a new real-time system was developed in order to replace the customary chemical analysis and size distribution tests. 20 samples were taken from two mines, selected by the Building Material Committee of Semnan Province, in order to determine the dissolved chlorine and sulfate, pH, density as well as size distribution. The new system is constituted of hydraulic jacks and a reservoir, designed to take samples from the conveyer in given time intervals. The samples were washed with distilled water and real-time analyses of dissolved chlorine and pH were performed. The results showed 85% agreement with the results from laboratory analyses. The correct classification rate (CCR) was 92% for 13 samples. |
| first_indexed | 2024-12-11T21:45:53Z |
| format | Article |
| id | doaj.art-296094d3fe75441fae30a6e8789f5bb0 |
| institution | Directory Open Access Journal |
| issn | 2345-6930 2345-6949 |
| language | English |
| last_indexed | 2024-12-11T21:45:53Z |
| publishDate | 2016-06-01 |
| publisher | University of Tehran |
| record_format | Article |
| series | International Journal of Mining and Geo-Engineering |
| spelling | doaj.art-296094d3fe75441fae30a6e8789f5bb02022-12-22T00:49:38ZengUniversity of TehranInternational Journal of Mining and Geo-Engineering2345-69302345-69492016-06-01501132257305A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, IranBehzad Tokhmechi0Seyed Fazlolah Saghravani1Parham Janfeshan Araghi2Hosein Marvi3Mohamad Esmaeel Borhani4Abolfazl Darbani5Associate Professor, Faculty of Mining, Petroleum and Geophysics Engineering, University of Shahrood, IranAssistant Professor, Faculty of Civil Engineering, University of Shahrood, IranPh.D. Candidate, Faculty of Civil Engineering, Isfahan University of Technology, IranAssistant Professor, Faculty of Electrical and Robotic Engineering, University of Shahrood, IranMining Engineer, Zaminnegar Pasargad Co., IranCivil Engineer, Semnan Provincial GovernmentThe quality of concrete is highly dependent on the characteristics of its aggregate, such as the size, minerals, and their chemical properties. Even a small amount of impurities, such as hydrated sulfates, chlorine (salt), and acidic pH of the rock material, can adversely affect the quality of the concrete. Thus, many national codes and standards are developed for testing, selecting, and employing the rock materials in concrete. For instance, Iranian standards 446, 449, 1702, 4978, 4984, 7174, and 86721 are currently serving this purpose. In the present research, a new real-time system was developed in order to replace the customary chemical analysis and size distribution tests. 20 samples were taken from two mines, selected by the Building Material Committee of Semnan Province, in order to determine the dissolved chlorine and sulfate, pH, density as well as size distribution. The new system is constituted of hydraulic jacks and a reservoir, designed to take samples from the conveyer in given time intervals. The samples were washed with distilled water and real-time analyses of dissolved chlorine and pH were performed. The results showed 85% agreement with the results from laboratory analyses. The correct classification rate (CCR) was 92% for 13 samples.http://ijmge.ut.ac.ir/article_57305_e98e3c632bdf1f9a8e4f63799b37853a.pdfconcrete mixture, dissolved chloride, pHreal-time analysis, rock material |
| spellingShingle | Behzad Tokhmechi Seyed Fazlolah Saghravani Parham Janfeshan Araghi Hosein Marvi Mohamad Esmaeel Borhani Abolfazl Darbani A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran International Journal of Mining and Geo-Engineering concrete mixture, dissolved chloride, pH real-time analysis, rock material |
| title | A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran |
| title_full | A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran |
| title_fullStr | A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran |
| title_full_unstemmed | A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran |
| title_short | A real-time approach toward the chemical quality control of rock material (Case study: Gravel mines in Semnan, Iran |
| title_sort | real time approach toward the chemical quality control of rock material case study gravel mines in semnan iran |
| topic | concrete mixture, dissolved chloride, pH real-time analysis, rock material |
| url | http://ijmge.ut.ac.ir/article_57305_e98e3c632bdf1f9a8e4f63799b37853a.pdf |
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