Development of expansive concrete for chemical prestressing applications
Expansive concrete is a specialized type of concrete that expands when mixed with water leading to a larger volume after setting. Such concrete is usually used to compensate for shrinkage. However, although expansive concrete can also be used in self-stressing concrete (chemical prestressing), still...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952300791X |
| _version_ | 1797454548805091328 |
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| author | Mohammed K. Dhahir Steffen Marx |
| author_facet | Mohammed K. Dhahir Steffen Marx |
| author_sort | Mohammed K. Dhahir |
| collection | DOAJ |
| description | Expansive concrete is a specialized type of concrete that expands when mixed with water leading to a larger volume after setting. Such concrete is usually used to compensate for shrinkage. However, although expansive concrete can also be used in self-stressing concrete (chemical prestressing), still such use is very limited. This is because achieving high expansion rates in expansive concrete while upholding desirable mechanical strength and durability characteristics presents a formidable challenge. This study aims to develop expansive concrete capable of achieving substantial expansion rates while maintaining robust mechanical attributes. The research also delves into the material's behaviour over an extended period of time. First, a thorough examination of existing literature was conducted to select the component of the mixture. The mixture was subsequently prepared using various replacement ratios of expansive agent (CSA) in relation to the weight of the cement. These ratios included: 0%, 10%, 12.5%, 15%, 17.5%, and 20%. To study the influence of curing, the specimens were divided into two groups: one immersed in water, while the other was left in dry conditions. The findings have revealed that high expansion values can be achieved when using moderate replacement rations of CSA in combination with continuous water curing. Conversely, low expansion rates were recorded for specimens cured in dry conditions. Notably, such specimens can expand later when exposed to water, which can adversely influence the strength and durability of the concrete. |
| first_indexed | 2024-03-09T15:38:46Z |
| format | Article |
| id | doaj.art-359299f8d13c47c29eef18e65bea995c |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-09T15:38:46Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-359299f8d13c47c29eef18e65bea995c2023-11-25T04:49:29ZengElsevierCase Studies in Construction Materials2214-50952023-12-0119e02611Development of expansive concrete for chemical prestressing applicationsMohammed K. Dhahir0Steffen Marx1Corresponding author.; Institute of Concrete Structures, TU Dresden, Dresden, GermanyInstitute of Concrete Structures, TU Dresden, Dresden, GermanyExpansive concrete is a specialized type of concrete that expands when mixed with water leading to a larger volume after setting. Such concrete is usually used to compensate for shrinkage. However, although expansive concrete can also be used in self-stressing concrete (chemical prestressing), still such use is very limited. This is because achieving high expansion rates in expansive concrete while upholding desirable mechanical strength and durability characteristics presents a formidable challenge. This study aims to develop expansive concrete capable of achieving substantial expansion rates while maintaining robust mechanical attributes. The research also delves into the material's behaviour over an extended period of time. First, a thorough examination of existing literature was conducted to select the component of the mixture. The mixture was subsequently prepared using various replacement ratios of expansive agent (CSA) in relation to the weight of the cement. These ratios included: 0%, 10%, 12.5%, 15%, 17.5%, and 20%. To study the influence of curing, the specimens were divided into two groups: one immersed in water, while the other was left in dry conditions. The findings have revealed that high expansion values can be achieved when using moderate replacement rations of CSA in combination with continuous water curing. Conversely, low expansion rates were recorded for specimens cured in dry conditions. Notably, such specimens can expand later when exposed to water, which can adversely influence the strength and durability of the concrete.http://www.sciencedirect.com/science/article/pii/S221450952300791XExpansive concreteCalcium sulfoaluminateChemical prestressingShrinkage compensatingRe-expansion phenomenon |
| spellingShingle | Mohammed K. Dhahir Steffen Marx Development of expansive concrete for chemical prestressing applications Case Studies in Construction Materials Expansive concrete Calcium sulfoaluminate Chemical prestressing Shrinkage compensating Re-expansion phenomenon |
| title | Development of expansive concrete for chemical prestressing applications |
| title_full | Development of expansive concrete for chemical prestressing applications |
| title_fullStr | Development of expansive concrete for chemical prestressing applications |
| title_full_unstemmed | Development of expansive concrete for chemical prestressing applications |
| title_short | Development of expansive concrete for chemical prestressing applications |
| title_sort | development of expansive concrete for chemical prestressing applications |
| topic | Expansive concrete Calcium sulfoaluminate Chemical prestressing Shrinkage compensating Re-expansion phenomenon |
| url | http://www.sciencedirect.com/science/article/pii/S221450952300791X |
| work_keys_str_mv | AT mohammedkdhahir developmentofexpansiveconcreteforchemicalprestressingapplications AT steffenmarx developmentofexpansiveconcreteforchemicalprestressingapplications |