Effects of hybrid fibers on workability, mechanical, and time-dependent properties of high strength fiber-reinforced self-consolidating concrete

Li, K.F.; Yang, Caiqian; Huang, Wei; Zhao, Yanbing; Wang, Yi; Pan, Yong; Xu, Fu

doi:10.1016/j.conbuildmat.2021.122325

Cited by 36 publications

(14 citation statements)

References 27 publications

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“…Then, the concrete blocks were stacked on top of the specimen beams at the locations pre-marked in (ii) to achieve accurate loading of each specimen beam. For the loading force, referring to existing studies [10,14,16], its size was about 30% of the predicted ultimate load capacity of the ceramsite concrete beam. Dial indicators were used to measure the deflection of the specimen beams.…”

Section: Loading and Testing Methodsmentioning

confidence: 99%

“…Factors that affect the creep of concrete are usually the loading age [6,10,11] and body surface ratio [12,13] of structural members, the slump [14] and sand content [15] of concrete, the relative humidity [16] and air content [17] of the working environment where concrete members reside, etc. Existing studies showed: (i) The tensile creep of high-absorbent ceramsite concrete was lower than that of low-absorbent ceramsite concrete and ordinary ceramsite concrete [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Volume-to-Surface Area Ratio on the Creep Behavior of Steel Fiber Ceramsite Concrete Beams

Zhu

et al. 2022

Coatings

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To explore the influence of the volume-to-surface area ratio (V/S) on the creep of ceramsite concrete beams, the creep performance of ceramsite concrete beams with different V/S was studied through a long-term deformation observation test, theoretical derivation analysis and finite element modeling. First, by observing the creep deflection of ceramsite concrete beams with five different V/Ss for 180 days, the relationship between creep deflection and loading time as well as the influence of V/S on creep deflection were obtained. Then, referring to the ACI209 and ACI435 creep coefficient calculation formula, the creep theory of ceramsite concrete beams involving V/S was established. Finally, the numerical model was built according to the test parameters. The results showed that the growth rate of the creep of ceramsite concrete beams increased rapidly in the early stage, but gradually slowed down with the passage of time and tended to be stable after 120 days of loading. The V/S had a significant impact on the creep of ceramsite concrete beams. In the first 7 days, the creep growth rate of each beam was approximately the same. Thereafter, the higher the V/S was, the lower the creep became. After 28 days, the creep of ceramsite concrete beams with varied V/Ss showed sharp differences. After the V/S exceeded 30, the increasing V/S could effectively reduce the creep value and the creep growth rate under a long-term load. The calculated results were in good agreement with the measured values, which fully reflected its creep variation. The finite element simulation further verified the influence of V/S on the creep of ceramsite concrete beams and the reliability of the creep calculation formula.

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Section: Loading and Testing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Volume-to-Surface Area Ratio on the Creep Behavior of Steel Fiber Ceramsite Concrete Beams

Zhu

et al. 2022

Coatings

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“…Meanwhile, PVA fibers reduced the compressive strength and displayed limited restraining effects on the specific creep. However, the positive synergetic effects of hybrid fibers can reverse the reductions in compressive strength caused by the PVA fiber and increase flexural performances with multi-scale bridge effects (Li et al, 2021).…”

Section: )mentioning

confidence: 99%

Specialists Preparation For New Technologies Development Of The Nuclear Industry Construction Complex

Leonidovna¹

2021

European Proceedings of Social and Behavioural Sciences

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The article highlights the problem of forming the construction complex personnel readiness for industry innovations while constructing nuclear energy facilities. The authors consider this problem in the light of the Knowledge Management methodology and the modern approaches of the Nuclear Energy Agency under the auspices of the Organization for Economic Cooperation and Development (OECD -NEA) to understanding the quality of human resources as intangible assets that affect the reduction in the cost of nuclear energy construction projects. The authors promote the idea of considering advanced training and retraining programs as a mean of "soft force" in personnel management in solving organizational tasks of implementing a construction facility, since the engineering literacy of specialists and accumulated experience contribute to increasing labor productivity and reducing investment costs. The authors critically assess the content of the programs and propose to increase the methodological potential with intellectual resources developed on the basis of the experience and practice of the world modern achievements of the NPP construction, including the practice of experimental work of developing and applying self-consolidating concrete. The article provides an overview of modern publications reflecting the advantages and problems of SCC from various sides.

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“…Adding diligently and equivalently spread discontinuous detached fibres, in small quantities, to concrete, expressively improves the performance against static and dynamic loads [23][24][25]. The consequences of fibre inclusion in the SCC mixes are explored on its mechanical properties such as compressive strength, split tensile strength and flexural strength of fibre reinforced SCC and established that incorporation of fibres into SCC though reduces workability (which can be counteracted through effective use of PCE based chemical admixtures), effectively increases the mechanical properties [26]. The influence of alkali-resistant (AR) glass fibre, as discrete reinforcement, at 0.03%, 0.06% and 0.1% on durability characteristics of concrete was explored and reported that, for all the grades of concrete, incorporation of AR fibres at 0.1%, maximum enhancement in durability characteristics of concrete was achieved [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…The consequences of fibre inclusion in the SCC mixes are explored on its mechanical properties such as compressive strength, split tensile strength and flexural strength of fibre reinforced SCC and established that incorporation of fibres into SCC though reduces workability (which can be counteracted through effective use of PCE based chemical admixtures), effectively increases the mechanical properties [26]. The influence of alkali-resistant (AR) glass fibre, as discrete reinforcement, at 0.03%, 0.06% and 0.1% on durability characteristics of concrete was explored and reported that, for all the grades of concrete, incorporation of AR fibres at 0.1%, maximum enhancement in durability characteristics of concrete was achieved [26][27][28]. This contradicts with the outcome of the study [26] stating that 1% AR fibres incorporation improves the durability performance of concrete [28], hence further research may be required to ascertain the effects of AR fibres in SCC.…”

Section: Introductionmentioning

confidence: 99%

Fresh and Hardened Properties of Ternary Blended Fast Setting Early Strength Fibre Reinforced Self Compacting Concrete

Diddi¹,

Sharma²,

Srivastava³

et al. 2022

cea

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Effects of hybrid fibers on workability, mechanical, and time-dependent properties of high strength fiber-reinforced self-consolidating concrete

Cited by 36 publications

References 27 publications

Influence of Volume-to-Surface Area Ratio on the Creep Behavior of Steel Fiber Ceramsite Concrete Beams

Influence of Volume-to-Surface Area Ratio on the Creep Behavior of Steel Fiber Ceramsite Concrete Beams

Specialists Preparation For New Technologies Development Of The Nuclear Industry Construction Complex

Fresh and Hardened Properties of Ternary Blended Fast Setting Early Strength Fibre Reinforced Self Compacting Concrete

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