Compressive and flexural properties of ultra-high performance fiber-reinforced cementitious composite: The effect of coarse aggregate

Wu, Fanghong; Xu, Lihua; Chi, Yin; Zeng, Yanqin; Deng, Fangqian; Chen, Qian

doi:10.1016/j.compstruct.2019.111810

Cited by 87 publications

(10 citation statements)

References 31 publications

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“…Regarding the water/binder factor (w/b), some authors suggest that this factor should be less than 0.40 [ 17 , 18 , 19 ], contrary to what is observed in conventional concretes, where the w/b factor ranges from 0.45 to 0.65 [ 20 , 21 , 22 ]. Regarding cement consumption, it is usual for it to be between 400 to 700 kg/m 3 [ 23 , 24 , 25 , 26 ], while for CC, the cement consumption is usually between 260 to 380 kg/m 3 [ 25 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

106

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This review article proposes the identification and basic concepts of materials that might be used for the production of high-performance concrete (HPC) and ultra-high-performance concrete (UHPC). Although other reviews have addressed this topic, the present work differs by presenting relevant aspects on possible materials applied in the production of HPC and UHPC. The main innovation of this review article is to identify the perspectives for new materials that can be considered in the production of novel special concretes. After consulting different bibliographic databases, some information related to ordinary Portland cement (OPC), mineral additions, aggregates, and chemical additives used for the production of HPC and UHPC were highlighted. Relevant information on the application of synthetic and natural fibers is also highlighted in association with a cement matrix of HPC and UHPC, forming composites with properties superior to conventional concrete used in civil construction. The article also presents some relevant characteristics for the application of HPC and UHPC produced with alkali-activated cement, an alternative binder to OPC produced through the reaction between two essential components: precursors and activators. Some information about the main types of precursors, subdivided into materials rich in aluminosilicates and rich in calcium, were also highlighted. Finally, suggestions for future work related to the application of HPC and UHPC are highlighted, guiding future research on this topic.

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Section: Introductionmentioning

confidence: 99%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

106

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“…The comparison between the CA-UHPC type of C30 and C32 shows that the initial flexural stiffness and the flexural stiffness at the serviceability limit state were also enhanced by the incorporation of 2% steel fiber. Furthermore, the comparison of the C32 and C02 specimens indicates that the incorporation of moderate coarse aggregate in UHPC core also enhances the flexural stiffness of CA-UHPCFST beam, since the coarse aggregate can increase the stiffness and elastic modulus of concrete [ 36 ].…”

Section: Test Results and Discussionmentioning

confidence: 99%

Experimental Investigation of Flexural Behavior of Ultra-High-Performance Concrete with Coarse Aggregate-Filled Steel Tubes

Zeng

et al. 2021

Materials

Self Cite

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This paper presents an experimental investigation of flexural behavior of circular ultra-high-performance concrete with coarse aggregate (CA-UHPC)-filled steel tubes (CA-UHPCFSTs). A total of seven flexural members were tested under a four-point bending load. The failure modes, overall deflection curves, moment-versus-curvature relationships, moment-versus-strain curves, strain distribution curves, ductility, flexural stiffness and ultimate flexural capacity were evaluated. The results indicate that the CA-UHPCFSTs under bending behaved in a good ductile manner. The CA-UHPC strength has a limited effect on the ultimate flexural capacity, while the addition of steel fiber can improve the ultimate flexural capacity. Increasing the steel tube thickness leads to higher flexural stiffness and ultimate flexural capacity. There is a significant confinement effect between the steel tube and the CA-UHPC core in the compressive zone and centroidal plane after the specimen enters the elastic-plastic stage, while the confinement effect in the tensile zone is minimal. Moreover, the measured flexural stiffness and ultimate flexural capacity were compared with the predictions using various design specifications. Two empirical formulas for calculating the initial and serviceability-level flexural stiffness of CA-UHPCFSTs are developed. Further research is required to propose the accurate design formula for the ultimate flexural capacity of CA-UHPCFSTs.

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“…e main reason for the improvement is the increase of the dosage of coarse aggregate. Some researchers also observed that when the content of coarse aggregate does not exceed a certain threshold, the compressive strength of UHPC-CA increase when the coarse aggregate content increase [37,44]. It was reported that adding coarse aggregate to the UHPC matrix results in forming an equivalent skeleton, due to the aggregate interlocking, to enhance the rigidity of concrete, thus, improving the overall compression performance of UHPC-CA [44], as depicted in Figure 10.…”

Section: Workabilitymentioning

confidence: 94%

“…us, it is necessary to investigate other sizes of coarse aggregate employed into the packing model. In previous studies, the upper limit of coarse aggregate particle size is usually 8, 10, 16, or 20 mm [37,44,46,47]. For the Table 5: e relationship between the volume fraction of CA and q under di erent maximum particle sizes based on the MAA model.…”

Section: Empirical Prediction Of the Optimal Coarse Aggregatementioning

confidence: 99%

Influence of Distribution Modulus on the Compressive Strength of Ultra‐High‐Performance Concrete with Coarse Aggregate (UHPC‐CA)

Zhang

et al. 2022

Advances in Civil Engineering

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The Modified Andreasen and Andersen model (MAA model) is commonly chosen to realize condensed particle packing in ultra-high-performance concretes (UHPCs). In the MAA model, the q (distribution modulus) is a parameter that plays a critical role in the UHPC matrix design. The objective of this study is to figure out the influence of the q for the compressive strength of UHPC-containing coarse aggregate (UHPC-CA). Therefore, a series of investigations were conducted, covering the following aspects: first, the traditional design procedure, based on the MAA model, of UHPC-CA is revised by taking water and steel fibers into account in the particle packing system. The results show that the revised design process of UHPC-CA yielded more excellent products with better workability and compressive strength. Second, different q values which are 0.2, 0.21, 0.22, 0.23, and 0.25 are employed. The results show that when q is 0.25, the maximum compressive strength can be achieved. However, the flowability decreases with the increase of the q value. Third, an empirical calculation of the optimal coarse aggregate content in the light of different q values and maximum size of coarse aggregate are proposed.

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Compressive and flexural properties of ultra-high performance fiber-reinforced cementitious composite: The effect of coarse aggregate

Cited by 87 publications

References 31 publications

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Experimental Investigation of Flexural Behavior of Ultra-High-Performance Concrete with Coarse Aggregate-Filled Steel Tubes

Influence of Distribution Modulus on the Compressive Strength of Ultra‐High‐Performance Concrete with Coarse Aggregate (UHPC‐CA)

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