Estimation of Concrete Strength in Sewer Systems
Environmental conditions in sewer systems are such that the concrete in the sewer structures are attacked and heavy losses are inflicted. In this paper, the results of an in-situ study of the effects of environmental and service conditions on the surface strength of concrete are presented. In these...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Water and Wastewater Consulting Engineers Research Development
2015-10-01
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| Series: | آب و فاضلاب |
| Subjects: | |
| Online Access: | http://www.wwjournal.ir/article_9893_dc6fd4b5ac0f0f24b758cbcb1f8a8cde.pdf |
| _version_ | 1818944967444267008 |
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| author | Mahmood Naderi Hassan Roostaei |
| author_facet | Mahmood Naderi Hassan Roostaei |
| author_sort | Mahmood Naderi |
| collection | DOAJ |
| description | Environmental conditions in sewer systems are such that the concrete in the sewer structures are attacked and heavy losses are inflicted. In this paper, the results of an in-situ study of the effects of environmental and service conditions on the surface strength of concrete are presented. In these investigations, different concrete mixes with different strengths were examined in the sewer system in the city of Malayer where the ambient pH (inside the sewage pipe and above the passing sewage line) ranged from 4 to 6. The in-situ, twist-off method was used for measuring the surface strength of concrete samples. Results indicate that concrete strength decreased with reducing pH level. Under neutral conditions, however, the strength of almost all the concrete specimens increased after 135 days. Finally, the concrete specimens with no additives exhibited reduced strength while those containing 10 percent micro-silica showed an increase in strength. |
| first_indexed | 2024-12-20T07:51:38Z |
| format | Article |
| id | doaj.art-6eda3b65b83e43fa940f7cf03ea13942 |
| institution | Directory Open Access Journal |
| issn | 1024-5936 2383-0905 |
| language | English |
| last_indexed | 2024-12-20T07:51:38Z |
| publishDate | 2015-10-01 |
| publisher | Water and Wastewater Consulting Engineers Research Development |
| record_format | Article |
| series | آب و فاضلاب |
| spelling | doaj.art-6eda3b65b83e43fa940f7cf03ea139422022-12-21T19:47:49ZengWater and Wastewater Consulting Engineers Research Developmentآب و فاضلاب1024-59362383-09052015-10-0126451649893Estimation of Concrete Strength in Sewer SystemsMahmood Naderi0Hassan Roostaei1Assoc. Prof., Imam Khomeini International University, QazvinFormer MSc Student of Structural Engineering, Takestan Islamic Azad University, TakestanEnvironmental conditions in sewer systems are such that the concrete in the sewer structures are attacked and heavy losses are inflicted. In this paper, the results of an in-situ study of the effects of environmental and service conditions on the surface strength of concrete are presented. In these investigations, different concrete mixes with different strengths were examined in the sewer system in the city of Malayer where the ambient pH (inside the sewage pipe and above the passing sewage line) ranged from 4 to 6. The in-situ, twist-off method was used for measuring the surface strength of concrete samples. Results indicate that concrete strength decreased with reducing pH level. Under neutral conditions, however, the strength of almost all the concrete specimens increased after 135 days. Finally, the concrete specimens with no additives exhibited reduced strength while those containing 10 percent micro-silica showed an increase in strength.http://www.wwjournal.ir/article_9893_dc6fd4b5ac0f0f24b758cbcb1f8a8cde.pdfTwist-Off MethodAdditivesSewage SystemsConcrete strength |
| spellingShingle | Mahmood Naderi Hassan Roostaei Estimation of Concrete Strength in Sewer Systems آب و فاضلاب Twist-Off Method Additives Sewage Systems Concrete strength |
| title | Estimation of Concrete Strength in Sewer Systems |
| title_full | Estimation of Concrete Strength in Sewer Systems |
| title_fullStr | Estimation of Concrete Strength in Sewer Systems |
| title_full_unstemmed | Estimation of Concrete Strength in Sewer Systems |
| title_short | Estimation of Concrete Strength in Sewer Systems |
| title_sort | estimation of concrete strength in sewer systems |
| topic | Twist-Off Method Additives Sewage Systems Concrete strength |
| url | http://www.wwjournal.ir/article_9893_dc6fd4b5ac0f0f24b758cbcb1f8a8cde.pdf |
| work_keys_str_mv | AT mahmoodnaderi estimationofconcretestrengthinsewersystems AT hassanroostaei estimationofconcretestrengthinsewersystems |