Evaluation of early age cracking in rendering mortars with polypropylene fibers
The incorporation of fibers in concrete produces an improvement in the characteristics of the material as observed in different studies. In order to obtain the same good results, fibers are added to rendering mortars to reduce some of their drawbacks. However, this type of mortar has some specific c...
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| 言語: | eng |
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ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
2018
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ojs-article-726572019-01-08T18:41:31Z Evaluation of early age cracking in rendering mortars with polypropylene fibers Monte, Renata Barros, Mercia Maria Semensato Bottura Figueiredo, Antonio Domingues de rendering mortar; polypropylene fiber; cracking; mechanical strength; ring test The incorporation of fibers in concrete produces an improvement in the characteristics of the material as observed in different studies. In order to obtain the same good results, fibers are added to rendering mortars to reduce some of their drawbacks. However, this type of mortar has some specific characteristics, such as hydrated-lime utilization or higher air, which is not usual in concrete. Thus, this study aims to evaluate the potential of polypropylene fibers to reduce early age cracking caused by restrained shrinkage in rendering mortars. Two types of mortars were used to verify possible differences in the way they responded to the introduction of fiber. The influence of the fiber content was also investigated. Mortars were evaluated in fresh state, and mechanical behaviors were measured at several ages. The restrained shrinkage cracking was followed for 21 days using the ring test method. The use of polypropylene fibers leads a smaller value of total crack width and a delay of the first crack. Also, the elastic modulus shows a higher correlation with the mortars crack width. Both parameters were successfully used to predict the mortars crack width. The ring test method may be a suitable test method to evaluate the capacity of fibers to control the crack formation in rendering mortars. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído FAPESP - Fundação de Amparo a Pesquisa do Estado de São Paulo 2018-06-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://seer.ufrgs.br/ambienteconstruido/article/view/72657 Ambiente Construído; v. 18, n. 2 (2018): Edição especial sobre Tecnologia das Argamassas; 21-32 Ambiente Construído; v. 18, n. 2 (2018): Edição especial sobre Tecnologia das Argamassas; 21-32 Ambiente Construído; v. 18, n. 2 (2018): Edição especial sobre Tecnologia das Argamassas; 21-32 1678-8621 1415-8876 eng https://seer.ufrgs.br/ambienteconstruido/article/view/72657/48340 Direitos autorais 2018 Ambiente Construído https://creativecommons.org/licenses/by/4.0 |
| institution |
Universidade Federal do Rio Grande do Sul |
| collection |
OJS |
| language |
eng |
| format |
Online |
| author |
Monte, Renata Barros, Mercia Maria Semensato Bottura Figueiredo, Antonio Domingues de |
| spellingShingle |
Monte, Renata Barros, Mercia Maria Semensato Bottura Figueiredo, Antonio Domingues de Evaluation of early age cracking in rendering mortars with polypropylene fibers |
| author_facet |
Monte, Renata Barros, Mercia Maria Semensato Bottura Figueiredo, Antonio Domingues de |
| author_sort |
Monte, Renata |
| title |
Evaluation of early age cracking in rendering mortars with polypropylene fibers |
| title_short |
Evaluation of early age cracking in rendering mortars with polypropylene fibers |
| title_full |
Evaluation of early age cracking in rendering mortars with polypropylene fibers |
| title_fullStr |
Evaluation of early age cracking in rendering mortars with polypropylene fibers |
| title_full_unstemmed |
Evaluation of early age cracking in rendering mortars with polypropylene fibers |
| title_sort |
evaluation of early age cracking in rendering mortars with polypropylene fibers |
| description |
The incorporation of fibers in concrete produces an improvement in the characteristics of the material as observed in different studies. In order to obtain the same good results, fibers are added to rendering mortars to reduce some of their drawbacks. However, this type of mortar has some specific characteristics, such as hydrated-lime utilization or higher air, which is not usual in concrete. Thus, this study aims to evaluate the potential of polypropylene fibers to reduce early age cracking caused by restrained shrinkage in rendering mortars. Two types of mortars were used to verify possible differences in the way they responded to the introduction of fiber. The influence of the fiber content was also investigated. Mortars were evaluated in fresh state, and mechanical behaviors were measured at several ages. The restrained shrinkage cracking was followed for 21 days using the ring test method. The use of polypropylene fibers leads a smaller value of total crack width and a delay of the first crack. Also, the elastic modulus shows a higher correlation with the mortars crack width. Both parameters were successfully used to predict the mortars crack width. The ring test method may be a suitable test method to evaluate the capacity of fibers to control the crack formation in rendering mortars. |
| publisher |
ANTAC - Associação Nacional de Tecnologia do Ambiente Construído |
| publishDate |
2018 |
| url |
https://seer.ufrgs.br/ambienteconstruido/article/view/72657 |
| work_keys_str_mv |
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1709370581967699968 |