Characteristics of 3D-printing ultra-high performance fibre-reinforced concrete under impact loading

Yang, Yekai; Wu, Chengqing; Liu, Zhongxina; Li, Jun; Yang, Tian; Jiang, Xiquan

doi:10.1016/j.ijimpeng.2022.104205

Cited by 32 publications

(3 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the increasing number of vehicles and their improper operation by humans, accidental vehicle crashes have occurred frequently in recent years [1,2], which has led to a serious threat to critical infrastructure and architectural structures, especially reinforced concrete (RC) structures [3,4]. RC structures experience severe spalling damage and reduced structural integrity under impact loading due to the brittle properties of the concrete, which in turn increases the risk of structural collapse [5,6]; therefore, structural protection of important reinforced concrete structures against impact load has attracted increasing attention in recent decades.…”

Section: Introductionmentioning

confidence: 99%

Impact Performance of RC Beams Reinforced by Engineered Cementitious Composite

2023

Buildings

View full text Add to dashboard Cite

To mitigate potential damage to RC structures subjected to impact load—especially spalling damage—engineered cementitious composite (ECC) is applied, with the aim of reinforcing the RC members, so as to improve their impact performance. In the present study, the response of beams, with and without ECC reinforcement, to impact loading was investigated. Firstly, the mechanical properties of the ECC were characterized by quasi-static compression and tension tests, as well as by dynamic direct tension tests. Then, the K&C model (Karagozian and Case Concrete Model) was employed to delineate the ECC behavior, whose parameters were calibrated using the test data. Subsequently, models of RC beams with and without ECC reinforcement, validated using the drop weight test, were established to investigate the impact response. The numerical results suggested that the performance of the impact resistance of the ECC-reinforced RC beams was significantly improved. The damage degree of the ECC-reinforced members was effectively reduced, the degree of deformation was effectively controlled, and the energy consumption capacity was significantly increased while the impact load and transferred load increased. In particular, the method of multiple separate layers as reinforcement, proposed in this study, was found to reduce effectively the response and damage extent, improve the energy dissipation, and control the impact load and transferred load within certain levels. In addition, the multiple separate ECC layers effectively prevented the crack propagation caused by the cracking of the member, ensured the residual integrity of the member, and further improved the performance of the impact resistance of the member comprehensively.

show abstract

Section: Introductionmentioning

confidence: 99%

Impact Performance of RC Beams Reinforced by Engineered Cementitious Composite

2023

Buildings

View full text Add to dashboard Cite

show abstract

“…In terms of mechanical performance, unlike cast specimens, printed structures exhibit anisotropic and isotropic properties [17,18]. Therefore, it is crucial to evaluate the mechanical properties in different loading directions through compressive and flexural tests [19]. The anisotropy of 3DCP has been studied by several researchers.…”

Section: Introductionmentioning

confidence: 99%

“…The anisotropy of 3DCP has been studied by several researchers. According to their findings, 3DCP is more anisotropic and has less strength in the direction parallel to the vertical axis, compared to the other two directions [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of Commercially Available Premix UHPC-Based 3D Printable Concrete

et al. 2022

View full text Add to dashboard Cite

Several recent studies have attempted to formulate printable cementitious materials to meet the printing requirements, but these materials are designed to work with specific printing equipment and printing configurations. This paper aims to systematically develop and perform characterization of a commercially available ultra-high-performance concrete-class material (UHPC) modified to be printable. Four percentages of superplasticizer were used (100%, 94%, 88%, 82%) to adjust the UHPC mixture for 3D-printing requirements. A superplasticizer amount of 88% was considered adequate to meet the requirements. Several fresh and hardened properties of UHPC were measured experimentally: shape-retention ability and green strength were investigated in fresh state, and compressive and flexural strength were evaluated in three loading directions to evaluate the anisotropic effects. Furthermore, the strength of the interlayer bond was investigated. The UHPC developed in this study met the criteria for extrudability, buildability, and shape retention to ensure printability. In comparison with mold-cast UHPC, printed UHPC exhibited superior flexural performance (15–18%), but reduced compressive strength (32–56%). Finally, the results demonstrated that a commercially available UHPC-class material can be used for 3DCP, which possesses all necessary properties, both fresh and hardened.

show abstract

3D printed Ultra-High Performance Concrete: Preparation, Application, and Challenges

Bai

Chen

Li³

et al. 2023

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Abstract3D printed ultra-high performance concrete (3DP-UHPC) plays an important role in the realization of ultra-high compressive and tensile strengths. Considering the particular characteristics of UHPC, the conversion of UHPC to 3DP-UHPC is a complex phenomenon and has been the subject of numerous studies. It is very important to be able to design a thixotropic structure in the early hydration stage for bridging the gap between the slow setting of UHPC and the rapid setting of the 3D printing procedure. In the design and application of 3DP-UHPC, requirements such as the ratio of coagulant and flocculant, fiber alignment, reinforced 3D printed no-rebar reinforced concrete, safety, cost etc. need to be taken into account. We present a comprehensive review of 3DP-UHPC in concrete construction from preparation to application, including design method, raw materials, mechanical, reinforced methods, and applications. Finally, recommendations are provided to promote the application of 3DP-UHPC in engineering practice.

show abstract

Characteristics of 3D-printing ultra-high performance fibre-reinforced concrete under impact loading

Cited by 32 publications

References 53 publications

Impact Performance of RC Beams Reinforced by Engineered Cementitious Composite

Impact Performance of RC Beams Reinforced by Engineered Cementitious Composite

Mechanical Performance of Commercially Available Premix UHPC-Based 3D Printable Concrete

3D printed Ultra-High Performance Concrete: Preparation, Application, and Challenges

Contact Info

Product

Resources

About