Long-term behavior of cracked fiber reinforced concrete under service conditions

Monetti, Diego Hernán; Llano-Torre, Aitor; Torrijos, María Celeste; Giaccio, Graciela Marta; Zerbino, Raúl Luis; Martí‐Vargas, José R.; Serna, Pedro

doi:10.1016/j.conbuildmat.2018.10.230

Cited by 13 publications

(11 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, only a qualitative discussion of the results is meaningful. Generally, as in the case of uniaxial tension tests, the creep of SFRC is not drastic, specimens never experience tertiary creep or failure and creep coefficients are commensurable to those in compression [ 56 , 57 , 71 , 80 ]. As for results on PFRC, as in earlier described studies, the deformations tended to strongly depend on temperature.…”

Section: Research On the Materials Levelmentioning

confidence: 99%

“…One parameter that was identified as potentially having explanatory power was the crack opening rate COR [ 56 , 71 , 78 ]:

where COR i – j is the crack opening rate in time increment i – j , CMOD ct i and CMOD ct j are total crack opening at times t i and t j , respectively. COR tends to stabilize after a few weeks; hence, measurements should be performed for at least 90 days [ 71 ].…”

Section: Research On the Materials Levelmentioning

confidence: 99%

“…One parameter that was identified as potentially having explanatory power was the crack opening rate COR [56,71,78]:…”

Section: Long-term Bending Testsmentioning

confidence: 99%

See 2 more Smart Citations

Systematic Review on the Creep of Fiber-Reinforced Concrete

2020

View full text Add to dashboard Cite

Fiber-reinforced concrete (FRC) is increasingly used in structural applications owing to its benefits in terms of toughness, durability, ductility, construction cost and time. However, research on the creep behavior of FRC has not kept pace with other areas such as short-term properties. Therefore, this study aims to present a comprehensive and critical review of literature on the creep properties and behavior of FRC with recommendations for future research. A transparent literature search and filtering methodology were used to identify studies regarding creep on the single fiber level, FRC material level, and level of structural behavior of FRC members. Both experimental and theoretical research are analyzed. The results of the review show that, at the single fiber level, pull-out creep should be considered for steel fiber-reinforced concrete, whereas fiber creep can be a governing design parameter in the case of polymeric fiber reinforced concrete subjected to permanent tensile stresses incompatible with the mechanical time-dependent performance of the fiber. On the material level of FRC, a wide variety of test parameters still hinders the formulation of comprehensive constitutive models that allow proper consideration of the creep in the design of FRC elements. Although significant research remains to be carried out, the experience gained so far confirms that both steel and polymeric fibers can be used as concrete reinforcement provided certain limitations in terms of structural applications are imposed. Finally, by providing recommendations for future research, this study aims to contribute to code development and industry uptake of structural FRC applications.

show abstract

Section: Research On the Materials Levelmentioning

confidence: 99%

“…One parameter that was identified as potentially having explanatory power was the crack opening rate COR [ 56 , 71 , 78 ]:

Section: Research On the Materials Levelmentioning

confidence: 99%

See 1 more Smart Citation

Systematic Review on the Creep of Fiber-Reinforced Concrete

2020

View full text Add to dashboard Cite

show abstract

“…Several methodologies have been developed for multiple loading configurations and specimen sizes: flexure [5][6][7][8], direct tension [9][10][11], structural beams [12], round panels [13] and square panels [14,15]. Although these methodologies have been designed for standard FRCs, some of these methodologies have been applied to both standard FRC [16] and UHPFRC [17] specimens. To date, the most prevalent methodology for creep characterisation is the flexural creep test for prismatic specimens.…”

Section: Introductionmentioning

confidence: 99%

Recommendation of RILEM TC 261-CCF: test method to determine the flexural creep of fibre reinforced concrete in the cracked state

Llano-Torre

Ros

2021

Mater Struct

Self Cite

View full text Add to dashboard Cite

To date there is no clear consensus about how creep of cracked FRC structural elements should be considered. In recent years, different methodologies have been developed for multiple stress cases. The absence of a standardised methodology to evaluate flexural creep in the cracked state has hindered general comparisons and conclusions that could lead to significant advances in this topic. Since 2014, the study of the creep behaviour of cracked FRC has been coordinated by the RILEM TC 261-CCF. All the available creep methodologies were analysed in terms of procedure, equipment and results. A comprehensive Round-Robin Test (RRT) on the creep behaviour of cracked sections of FRC was proposed and undertaken by a total of 19 participant laboratories from 14 countries all over the world. The analysis and conclusions of the RRT results and the different methodologies provided the basis for this recommendation. This recommendation focuses on the test method to evaluate the flexural creep of FRC specimens in the cracked state. Guidelines on specimen production, detailed test equipment, experimental setup and test procedure as well as the definitions of the most relevant parameters are provided.

show abstract

“…Long-term behavior of concrete under different conditions has been quite studied, i.e. service conditions (cracking and induced stress) of fiber reinforced concrete [9], effect of compressive strength and reinforcement ratio on glass-fiber reinforced concrete [10], and a numerical expression for the effect of bending moment on long-term behavior [11].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of RC Beams Made with Recycled Aggregates Under 12-Month Long Term Loading

Oad

Memon

Buller

et al. 2019

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

In the present era of infrastructure development, demolishing waste management poses serious problems, particularly in urban centers. Vast development requires huge amounts of conventional concrete aggregates resulting in serious environmental problems. Therefore, efforts are carried out in utilizing demolishing waste, particularly demolishing concrete as coarse aggregates used in new concrete. This article presents laboratory investigations of flexural behavior of reinforced concrete beams made with partial replacement of natural coarse aggregates with coarse aggregates from demolished concrete under 12-month long-term loading. Two batches of beams were cast and cured for 28 days. In the first batch three RC beams with partial replacement of natural coarse aggregates were cast, while in the second batch 6 RC beams with all-natural coarse aggregates were prepared. Out of these six beams three beams were tested under short-term loading to determine maximum load. 50% of this load was used as sustained load on the remaining all beams. The beams were mounted on purpose made frames and deflection, strain, and cracking were recorded on daily basis. After the elapse of the defined time the beams were tested under central point load until failure. Result comparison shows a 4.96% increase in deflection and 2.33% reduction in peak load. Based on the results of this study it is concluded that demolished concrete as coarse aggregates in new concrete shows reasonably good performance under 12-month long-term loading.

show abstract

Long-term behavior of cracked fiber reinforced concrete under service conditions

Cited by 13 publications

References 18 publications

Systematic Review on the Creep of Fiber-Reinforced Concrete

Systematic Review on the Creep of Fiber-Reinforced Concrete

Recommendation of RILEM TC 261-CCF: test method to determine the flexural creep of fibre reinforced concrete in the cracked state

Flexural Behavior of RC Beams Made with Recycled Aggregates Under 12-Month Long Term Loading

Contact Info

Product

Resources

About