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Journal articles on the topic 'Ultra High Performance Concrete'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Dobiáš, Daniel, and Radka Pernicová. "Diffusion of Chloride Ions in Ultra High Performance Concrete." Advanced Materials Research 1106 (June 2015): 21–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.21.

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The article is dealing with study of chloride ions diffusion in ultra-high performance concrete UHPC, which might be potentially dangerous. Life of concrete structures, in particular in transport sector is jeopardized by risk of steel reinforcement corrosion with regards to exposure of the concrete surface to direct impact of de-icing salts. Measured data were examined in relation to the depth of penetration of chloride ions into the concrete structure. Experiment results proved that UHPC concretes are more resistant to penetration of chlorides than normal strength concretes.

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2

Lee. "Fatigue Evaluation of Precast Concrete Deck Connection using Ultra-High Performance, Fiber Reinforced Concrete." Journal of the Korean Society of Civil Engineers 35, no. 2 (2015): 275. http://dx.doi.org/10.12652/ksce.2015.35.2.0275.

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3

Zdeb, T. "Ultra-high performance concrete – properties and technology." Bulletin of the Polish Academy of Sciences: Technical Sciences 61, no. 1 (March 1, 2013): 183–93. http://dx.doi.org/10.2478/bpasts-2013-0017.

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Abstract The paper deals with information concerning properties and technology of a new generation cementitious composite i.e. Ultra-High Performance Concrete. High performance here means both high strength and high durability under the influence of environmental factors. This group of composites is mainly represented by Reactive Powder Concretes (RPC), which show both outstanding durability and mechanical properties. Characteristic features of RPC are mainly due to the very low water-cement ratio, which involves application of superplasticizer, significant reduction of aggregate grains size as well as hydrothermal treatment. In the first part of the paper selected properties of RPC are compared to ordinary concrete and to other groups of new generation concrete. Moreover, fundamental technological factors influencing properties of RPC are described as well. The second part deals with the RPC developed at Cracow University of Technology. The presented test results are mainly focused on the influence of steel fibres content on mechanical properties of reactive powder concrete and hydrothermal treatment on composites microstructure. The quantitative and qualitative evaluation of this relationship expand the knowledge of the UHPC technology. Finally, the third part presents the most significant and newest structures which have been erected with the use of RPC

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4

Nguyen, Duy-Liem, Duc-Kien Thai, and Dong-Joo Kim. "Direct tension-dependent flexural behavior of ultra-high-performance fiber-reinforced concretes." Journal of Strain Analysis for Engineering Design 52, no. 2 (February 2017): 121–34. http://dx.doi.org/10.1177/0309324716689625.

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This research investigated the effects of direct tensile response on the flexural resistance of ultra-high-performance fiber-reinforced concretes by performing sectional analysis. The correlations between direct tensile and flexural response of ultra-high-performance fiber-reinforced concretes were investigated in detail for the development of a design code of ultra-high-performance fiber-reinforced concrete flexural members as follows: (1) the tensile resistance of ultra-high-performance fiber-reinforced concretes right after first-cracking in tension should be higher than one-third of the first-cracking strength to obtain the deflection-hardening if the ultra-high-performance fiber-reinforced concretes show tensile strain-softening response; (2) the equivalent bottom strain of flexural member at the modulus of rupture is always higher than the strain capacity of ultra-high-performance fiber-reinforced concretes in tension; (3) the softening part in the direct tensile response of ultra-high-performance fiber-reinforced concretes significantly affects their flexural resistance; and (4) the moment resistance of ultra-high-performance fiber-reinforced concrete girders is more significantly influenced by the post-cracking tensile strength rather than the tensile strain capacity. Moreover, the size and geometry effects should be carefully considered in predicting the moment capacity of ultra-high-performance fiber-reinforced concrete beams.

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5

Shengyu, Wang, and Zhan Yijian. "Study on Optimization of Working Performance of Ultra High Performance Concrete." E3S Web of Conferences 198 (2020): 01005. http://dx.doi.org/10.1051/e3sconf/202019801005.

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The water binder ratio is a key parameter in the mix design of ultra-high performance concrete. Aiming at the high sensitivity of ultra-high performance concrete to water consumption, the influence of water consumption on the performance of ultra-high performance concrete was studied in a narrow range. The compatibility ratio of raw materials of ultra-high performance concrete can be adjusted, but the space is small, so we try to improve the fluidity of concrete by physical and chemical means. The experimental results show that the fluidity of concrete increases slightly with the addition of glass beads, but the flexural properties of the concrete are adversely affected. With the addition of viscosity reducer, the workbility of concrete increases, but the compressive strength decreases.

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6

Li, Jun, and Chengqing Wu. "Damage evaluation of ultra-high performance concrete columns after blast loads." International Journal of Protective Structures 9, no. 1 (March 2018): 44–64. http://dx.doi.org/10.1177/2041419617743986.

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As emerging advanced construction material, ultra-high performance concretes have seen increasing field applications over the past two decades to take advantages of their ultra-high mechanical strength and durability; yet the systematic study on its dynamic behaviour under impact and blast loads is not commonly seen. This article presents an experimental and numerical study on the static and dynamic behaviour of an existing ultra-high performance concrete material. Experimental study on its flexural behaviour under static loads is conducted and an inverse study is carried out to derive its uniaxial tensile constitutive law. The derived relationship is used in the material model in hydro-code LS-DYNA together with dynamic material properties to study ultra-high performance concrete columns under blast loads. The residual loading capacity of the column is studied and pressure–impulse diagrams for assessing the ultra-high performance concrete column damage under blast loads are proposed. Parametric study on effects of ultra-high performance concrete strength, column height, cross-section size and reinforcement ratio is performed and analytical equations are proposed for generating pressure–impulse diagrams for generic ultra-high performance concrete columns.

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7

Fang, YiChen. "Ultra high performance concrete shear walls." E3S Web of Conferences 294 (2021): 04004. http://dx.doi.org/10.1051/e3sconf/202129404004.

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The history of the development of Ultra-High Performance Concrete (UHPC) shear walls and the current status of today’s research as well as the future development prospects are comprehensively collated. The analysis process and conclusive results of the present-day domestic and international research on UHPC shear walls are highlighted. The load displacement curves, hysteresis curves and skeleton lines of ultra-high performance concrete shear walls under different experimental loads are collated and compared. Integrate the corresponding equations for shear bearing capacity and equations for the overall specimen load displacement curves. A finite element model of the ultra-high performance concrete shear wall is established to simulate and perform non-linear finite element analysis of its force process under unidirectional horizontal loading.

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8

Diederichs, Ulrich, Iris Marquardt, and Vít Petranek. "Rehydration of Ultra High Performance Concrete." Advanced Materials Research 897 (February 2014): 275–79. http://dx.doi.org/10.4028/www.scientific.net/amr.897.275.

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Ultra High Performance Concrete (UHPC) and High Strength Concrete (USC) are because of the high density of their matrices very susceptible to spalling during fire exposure. By aid of a heat treatment with maximum temperatures of about 450°C a network of capillaries and micro cracks could be formed, which leads like a porous medium to a relief of water vapor already at harmless low pressures and could prevent the materials from spalling. In the framework of the presented study on UHPC some orientating tests have been performed to obtain knowledge concerning alterations of the microstructure during thermal treatment at 150°C, 250°C, 350°C and 450°C and the subsequent storage in air with 100% relative humidity at 20°C as to allow water uptake and rehydration. The tests have shown that by aid of the said treatment generation of a respective porous system was achieved, which remained open for the transport of water vapor at high temperatures, also after water uptake and rehydration of the dehydrated cementitious matrix. However further studies are needed to get information about effects of the treatments on the mechanical properties and the durability of members.

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9

Sun, Jie. "Research Status and Prospects on the Ultra High Performance Concrete." Advanced Materials Research 168-170 (December 2010): 1506–8. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.1506.

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The ultra high performance concrete is a new cement-based composite material with ultra-high mechanical properties, excellent durability and excellent volume stability. In this paper, research and application of the ultra high performance concrete at home and abroad at present was introduced, existing problems of the ultra high performance concrete applied to much practical engineering were pointed out. Finally, the prospects of ultra high performance concrete were analyzed and the ultra high performance concrete is inevitable result of the sustainable development of modern concrete technology.

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10

Tagnit-Hamou, Arezki, Ablam Zidol, Nancy Soliman, Joris Deschamps, and Ahmed Omran. "Ground Glass Pozzolan in Conventional, High, and Ultra-High Performance Concrete." MATEC Web of Conferences 149 (2018): 01005. http://dx.doi.org/10.1051/matecconf/201814901005.

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Ground-glass pozzolan (G) obtained by grinding the mixed-waste glass to same fineness of cement can act as a supplementary-cementitious material (SCM), given that it is an amorphous and a pozzolanic material. The G showed promising performances in different concrete types such as conventional concrete (CC), high-performance concrete (HPC), and ultra-high performance concrete (UHPC). The current paper reports on the characteristics and performance of G in these concrete types. The use of G provides several advantages (technological, economical, and environmental). It reduces the production cost of concrete and decrease the carbon footprint of a traditional concrete structures. The rheology of fresh concrete can be improved due to the replacement of cement by non-absorptive glass particles. Strength and rigidity improvements in the concrete containing G are due to the fact that glass particles act as inclusions having a very high strength and elastic modulus that have a strengthening effect on the overall hardened matrix.

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11

Al-Basha, Ahmed J., William K. Toledo, Craig M. Newtson, and Brad D. Weldon. "Ultra-High Performance Concrete Overlays for Concrete Bridge Decks." IOP Conference Series: Materials Science and Engineering 471 (February 23, 2019): 032007. http://dx.doi.org/10.1088/1757-899x/471/3/032007.

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12

Pereira Prado, Lisiane, Ricardo Carrazedo, and Mounir Khalil El Debs. "Interface strength of High-Strength concrete to Ultra-High-Performance concrete." Engineering Structures 252 (February 2022): 113591. http://dx.doi.org/10.1016/j.engstruct.2021.113591.

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13

Kim, Haena, Byungkyu Moon, Xinyu Hu, Hosin (David) Lee, Gum-Sung Ryu, Kyung-Taek Koh, Changbin Joh, Byung-Suk Kim, and Brian Keierleber. "Construction and Performance Monitoring of Innovative Ultra-High-Performance Concrete Bridge." Infrastructures 6, no. 9 (August 30, 2021): 121. http://dx.doi.org/10.3390/infrastructures6090121.

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The application of Ultra-High-Performance Concrete (UHPC) materials in rehabilitating bridges and constructing primary bridge components is increasing rapidly across the world because of their superior strength and durability characteristics when compared to regular concretes. However, there have been few new bridges constructed using UHPC materials with regular formworks, ready-mix trucks, and construction equipment. This paper presents a comprehensive report encompassing the design, construction, and performance monitoring of a new bridge constructed in Iowa using a unique UHPC technology that includes steel fibers of two different lengths embedded in the concrete. By using optimized lengths of steel fibers, both the tensile strength and the toughness were increased. The UHPC material was produced with local cement and aggregates in the US using typical ready-mix concrete equipment. This paper discusses the experience gained from the design and construction process including mix design, batching, delivery of steel fibers to the ready-mix concrete batch unit, and post-tensioning of precast slabs at the jobsite. For four years after construction, the joints of the bridge decks were monitored using strain sensors mounted on both sides of the deck joints. The strain values were quite similar between the two sides of each joint, indicating a good load transfer between precast bridge girders. A bridge was successfully constructed using a unique UHPC technology incorporating two different lengths of steel fibers and utilizing local cement and aggregates and a ready-mix truck, and has been performing satisfactorily with a good load transfer across post-tensioned precast girder joints.

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14

Ženíšek, Michal, Tomáš Vlach, and Lenka Laiblová. "Aggregate Segregation of Ultra-High Performance Concrete." Key Engineering Materials 760 (January 2018): 164–68. http://dx.doi.org/10.4028/www.scientific.net/kem.760.164.

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This article deals with the aggregate segregation of ultra-high performance concrete. The main objective of this research was to determine which aspects of the design most affect segregation. It was studied the change of grading curve, water/powder ratio and consistency. Quartz sand with approximately rounded grains and maximum aggregate size up to 4 mm was used for the production of specimens. Segregation was evaluated after cutting the hardened concrete specimens according to the drop of grains of aggregate. The results show that segregation is by the far most affected by the consistency of concrete. Change of the grading curve or change the water/powder ratio has had no or little influence on segregation.

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15

Wang, Haolei, Tao Sun, Chen Tang, and Jiejun Wang. "Experimental and numerical investigation of steel–ultra-high-performance concrete continuous composite beam behavior." Advances in Structural Engineering 23, no. 10 (March 7, 2020): 2220–36. http://dx.doi.org/10.1177/1369433220911140.

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This article proposes a new kind of continuous composite beam that consists of steel box-girder and ultra-high-performance concrete waffle slab. The ultra-high-performance concrete helps increase the ultimate capacity and span of structure while reducing the risk of cracking that occurs with ordinary concrete. In order to investigate the mechanical properties of this new type of composite structure, two scaled specimens were designed and tested. One was a steel–ultra-high-performance concrete continuous composite beam, whereas the other, as a control specimen, was a prestressed steel-concrete continuous composite beam. The test results indicate that the bending capacity of steel–ultra-high-performance concrete continuous composite beam is 1.2 times that of steel-concrete continuous composite beam; the cracking strength of steel–ultra-high-performance concrete continuous composite beam is larger than 20 MPa, much higher than the conventional one; the crack development pattern of steel–ultra-high-performance concrete continuous composite beam has its own characteristics, and the cracks appeared in ultra-high-performance concrete slab dominated by micro-cracks with smaller length are numerous and intensive. A finite element model was developed to predict the behavior of steel–ultra-high-performance concrete continuous composite beam. Comparing the numerical and experimental results indicates that, generally, the numerical model can simulate the structural behavior of steel–ultra-high-performance concrete continuous composite beam reasonably. Based on the numerical model, a series of parameter analyses were performed, which indicate that the strength grade of steel, web, and bottom plate thickness play an important role in improving the bending capacity of steel–ultra-high-performance concrete continuous composite beam; the axial tensile strength of ultra-high-performance concrete, rib, and top plate height of ultra-high-performance concrete slab can enhance the bending capacity to a certain extent.

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16

Kim, Joung Rae, Hyo-Gyoung Kwak, Byung-Suk Kim, Yangsu Kwon, and El Mahdi Bouhjiti. "Finite element analyses and design of post-tensioned anchorage zone in ultra-high-performance concrete beams." Advances in Structural Engineering 22, no. 2 (July 20, 2018): 323–36. http://dx.doi.org/10.1177/1369433218787727.

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This article presents analyses and the design of a post-tensioned anchorage zone made of ultra-high-performance concretes with three-dimensional finite element analyses. The structural behavior was investigated through the failure modes and cracking patterns to show the anchorage zone resistance enhancement with an increase of the strength in concrete. Since the anchorage failure is usually initiated from the local zone in the case of ultra-high-performance concrete beams that have compressive strength of more than 80 MPa, the placement of reinforcements can effectively be used to enhance the strength and ductility for the local zone. However, ultra-high-performance concrete requires a smaller amount of reinforcement than normal-strength concrete. Parametric analyses are carried out to show the effect of the spiral reinforcement on the strength of the anchorage zone, and comparison with the design guidelines in NCHRP Report 356 is made. Finally, improved guidelines are suggested to cover the design of ultra-high-performance concrete.

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17

Hu, Aoxiang, Xingwen Liang, Jing Yu, and Qingxuan Shi. "Tensile characteristics of ultra-high-performance concrete." Magazine of Concrete Research 70, no. 6 (March 2018): 314–24. http://dx.doi.org/10.1680/jmacr.17.00126.

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18

Ambily, Parukutty S., Kapali Ravisankar, Chockkalingam Umarani, Jamboor K. Dattatreya, and Nagesh R. Iyer. "Development of ultra-high-performance geopolymer concrete." Magazine of Concrete Research 66, no. 2 (January 2014): 82–89. http://dx.doi.org/10.1680/macr.13.00057.

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19

Qaidi, Shaker M. A., Dawood Sulaiman Atrushi, Ahmed S. Mohammed, Hemn Unis Ahmed, Rabar H. Faraj, Wael Emad, Bassam A. Tayeh, and Hadee Mohammed Najm. "Ultra-high-performance geopolymer concrete: A review." Construction and Building Materials 346 (September 2022): 128495. http://dx.doi.org/10.1016/j.conbuildmat.2022.128495.

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20

Smith, A. S. J., and G. Xu. "Classification of Ultra-high Performance Concrete (UHPC)." European Journal of Engineering and Technology Research 6, no. 6 (October 16, 2021): 87–96. http://dx.doi.org/10.24018/ej-eng.2021.6.6.2605.

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Ultra-high performance concrete (UHPC) been an advanced concrete introduced as reactive powder concrete (RPC) over twenty years ago, is now being employed for use in the construction industry of some developed countries like China, Germany and United States of America. Its excellent properties in structural performance and durability make it the civil engineering material that will reshape the future of the construction industry in terms of structural performance; and this paper aims at helping construction experts and developing countries to understand and accept UHPC for use in everyday construction works. The paper gives an in-depth review on the classification of UHPCs based on mix proportion and mechanical properties. Firstly, the mixture design and the mechanical properties of UHPC were discussed. Then UHPC was classified into different types based on mechanical properties and the manufacturer’s modification of the ingredients used for reactive powder concrete or multi-scale cement composite production. This review shows that Funk and Dinger model (also known as Modified Andreasen and Andersen model (MAA)) is the most accepted and widely used mix design method for UHPC. It also revealed that UHPC’s compressive strength, tensile strength and flexural strength are in excess of 150, 7 and 40 MPa respectively. It further classified UHPC into BCV®, BSI®, Cemtec®, Ceracem, Ductal, DURA and UHPC with coarse aggregate; and this classification (especially UHPC with coarse aggregate) is a good sign that local materials can be incorporated into UHPC by developing countries for cost minimisation.

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21

Voytko, Danielle, Paolo M. Calvi, and John Stanton. "Shear strength of ultra high-performance concrete." Engineering Structures 255 (March 2022): 113961. http://dx.doi.org/10.1016/j.engstruct.2022.113961.

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22

Smith, A. S. J., and G. Xu. "Classification of Ultra-high Performance Concrete (UHPC)." European Journal of Engineering and Technology Research 6, no. 6 (October 16, 2021): 87–96. http://dx.doi.org/10.24018/ejeng.2021.6.6.2605.

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Ultra-high performance concrete (UHPC) been an advanced concrete introduced as reactive powder concrete (RPC) over twenty years ago, is now being employed for use in the construction industry of some developed countries like China, Germany and United States of America. Its excellent properties in structural performance and durability make it the civil engineering material that will reshape the future of the construction industry in terms of structural performance; and this paper aims at helping construction experts and developing countries to understand and accept UHPC for use in everyday construction works. The paper gives an in-depth review on the classification of UHPCs based on mix proportion and mechanical properties. Firstly, the mixture design and the mechanical properties of UHPC were discussed. Then UHPC was classified into different types based on mechanical properties and the manufacturer’s modification of the ingredients used for reactive powder concrete or multi-scale cement composite production. This review shows that Funk and Dinger model (also known as Modified Andreasen and Andersen model (MAA)) is the most accepted and widely used mix design method for UHPC. It also revealed that UHPC’s compressive strength, tensile strength and flexural strength are in excess of 150, 7 and 40 MPa respectively. It further classified UHPC into BCV®, BSI®, Cemtec®, Ceracem, Ductal, DURA and UHPC with coarse aggregate; and this classification (especially UHPC with coarse aggregate) is a good sign that local materials can be incorporated into UHPC by developing countries for cost minimisation.

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23

Koudelková, Veronika, Tereza Sajdlová, and Jiří Němeček. "Micromechanical Homogenization of Ultra-High Performance Concrete." Applied Mechanics and Materials 821 (January 2016): 518–25. http://dx.doi.org/10.4028/www.scientific.net/amm.821.518.

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Mechanical properties and durability of Ultra-High Performance Concretes (UHPC) are closely associated with composition and microstructure of tested samples. In this work, determination of effective elastic properties of UHPC composite was performed for a representative volume element using combination of microstructural investigations (scanning electron microscope imaging, image analysis of back scattered electron micrographs and nanoindentation) and analytical methods of micromechanics. Based on the volumetric content and micromechanical behavior of individual components an effective elastic modulus of the whole composite was predicted and compared with macroscopically measured value with good agreement within 5%.

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24

Kook, Kyung-Hun, Hyun-Oh Shin, Im-Jong Kwahk, and Young-Soo Yoon. "Bond Characteristics of Ultra High Performance Concrete." Journal of the Korea Concrete Institute 22, no. 6 (December 31, 2010): 753–60. http://dx.doi.org/10.4334/jkci.2010.22.6.753.

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25

Zhang, Jisong, and Yinghua Zhao. "Development of sustainable ultra-high performance concrete." IOP Conference Series: Earth and Environmental Science 61 (April 2017): 012076. http://dx.doi.org/10.1088/1755-1315/61/1/012076.

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26

McMurry, Grace, Brad Weldon, and Craig Newtson. "Workforce Development for Ultra-High Performance Concrete." MATEC Web of Conferences 271 (2019): 07005. http://dx.doi.org/10.1051/matecconf/201927107005.

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Ultra-high performance concrete (UHPC) is a cementitious material with a dense microstructure that contributes to high compressive strengths as well as enhanced durability properties. UHPC also possesses significant post-cracking strength and ductility due to the addition of fibers. These characteristics produce a material that provides advantages over conventional concrete; however, high costs attributed to materials and production, lack of industry familiarity and knowledge, and the absence of standardized design procedures have impeded its wide-spread use. To help disseminate knowledge on UHPC, the first of two workforce development symposiums on UHPC was held on April 17 – 18, 2018 in Las Cruces, New Mexico. The symposium consisted of presentations and hands-on demonstrations to introduce UHPC and distribute the findings of almost a decade of research conducted in New Mexico to a diverse audience including members of the New Mexico Department of Transportation, contractors, designers, researchers, and concrete suppliers.

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Pourbaba, Masoud, Abdolreza Joghataie, and Amir Mirmiran. "Shear behavior of ultra-high performance concrete." Construction and Building Materials 183 (September 2018): 554–64. http://dx.doi.org/10.1016/j.conbuildmat.2018.06.117.

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28

Kim, Yail J. "Recent Advances in Ultra-high Performance Concrete." Journal of the Korean Recycled Construction Resources Institute 1, no. 3 (December 30, 2013): 163–72. http://dx.doi.org/10.14190/jrcr.2013.1.3.163.

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29

von Werder, Julia, Sebastian Simon, Christian Lehmann, Christian Selleng, Patrick Fontana, and Birgit Meng. "Autoclaving of ultra-high performance concrete (UHPC)." ce/papers 2, no. 4 (September 2018): 131–36. http://dx.doi.org/10.1002/cepa.866.

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30

Wang, Jingyu, Wancheng Yuan, Ruiwei Feng, Junjun Guo, and Xinzhi Dang. "Dynamic performances of ultra-high-performance fiber-reinforced concrete–strengthened concrete columns subjected to blast impacts." Advances in Structural Engineering 23, no. 14 (June 12, 2020): 3009–23. http://dx.doi.org/10.1177/1369433220924797.

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Normal functionality of common concrete structures such as bridges and buildings relies heavily on the structural resistance under accidental or anthropogenic blast events. As one of the widely used structural types, reinforced concrete columns need to be highly considered when blast events occur to avoid severe socio-economic losses. To improve the blast–impact resistance of conventional reinforced concrete columns, this article makes the following contributions: (1) proposes to adopt the advanced ultra-high-performance fiber-reinforced concrete to strengthen the columns as a protective layer; (2) validates the superiority of ultra-high-performance fiber-reinforced concrete–strengthened columns through comparative study and specifies the controlling design parameters through sensitivity analysis; (3) implements and compares various ultra-high-performance fiber-reinforced concrete reinforcement methods; and (4) develops a numerical formula to predict the residual capacity of ultra-high-performance fiber-reinforced concrete–strengthened columns under blast impacts as a suitable alternate of the complicated and time-consuming finite element simulations.

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31

Xu, Li Bin, Nai Qian Feng, and Ir Dr Ch'ng Guan Bee. "Performance Research on Ultra-High Performance Self-Compaction Concrete (UHP-SCC)." Advanced Materials Research 671-674 (March 2013): 1745–50. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.1745.

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With development of concrete technology, the self-compaction concrete, as a green material, has been studied and widely applied thanks to its characteristics like self-leveling, self-compacting and desirable fillability. At present, high performance and ultra-high performance is an important trend in development of self-compaction concrete technology. Working performance, physical performance, endurance quality, ultra-high pumpability and microstructure of C100UHP-SCC are studied in this paper. The initial fluidity of studied UHP-SCC reaches above 550mm and maintains for 3h without loss, its compressive strength on 28d is more than 100MPa, which can ensure the architectural structure to last for 100 years and enable ultra-high pumping over 400m. The technical parameters mentioned above provide valuable reference for design and construction of super high-rise buildings which are above 1000m.

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32

S, Sundararaman, and Azhagarsamy S. "Performance of Ultra-High Performance Concrete Containing Mineral Admixtures." International Journal of Civil Engineering 2, no. 10 (October 25, 2015): 6–8. http://dx.doi.org/10.14445/23488352/ijce-v2i10p102.

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33

Mai, Viet-Chinh, and Sang Mook Han. "Structural Performance of Deteriorated Concrete Culverts Rehabilitated by Ultra High Performance Concrete." Journal of the Korean Society for Advanced Composite Structures 13, no. 2 (April 30, 2022): 43–51. http://dx.doi.org/10.11004/kosacs.2022.13.2.043.

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34

Graybeal, Benjamin A. "Ultra-high-performance concrete connections for precast concrete bridge decks." PCI Journal 59, no. 4 (September 1, 2014): 48–62. http://dx.doi.org/10.15554/pcij.09012014.48.62.

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35

Oberndorfer, Thomas, Frank Hunger, and Oliver Fischer. "Glued timber concrete composite walls using ultra-high-performance concrete." Acta Polytechnica CTU Proceedings 33 (March 3, 2022): 417–23. http://dx.doi.org/10.14311/app.2022.33.0417.

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This paper gives a short introduction of the development of cross laminated timber (CLT) concrete composite walls with a glued connection. In the composite walls, prefabricated ultra-high-performance concrete (UHPC) lamellas replace timber lamellas at the core layer of the CLT elements. To check the feasibility of gluing timber to UHPC small-scale shear, delamination and bonding tests were performed and showed promising results. The load bearing behaviour was analysed with centrically and eccentrically loaded tests on wall segments. Analytic modelling of the wall experiments using an effective bending stiffness, based on shear analogy method, showed a good correlation to the experimental results.

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Flores, Elsy Y., Jordan Varbel, Craig M. Newtson, and Brad D. Weldon. "Ultra-High-Performance Concrete Shear Keys in Concrete Bridge Superstructures." MATEC Web of Conferences 271 (2019): 07006. http://dx.doi.org/10.1051/matecconf/201927107006.

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Many existing bridges have adjacent girders that utilize grouted shear keys to transfer loads laterally across the superstructure. Cracking and leaking often cause degradation of the shear key and the girder. This work investigates the potential for using non-proprietary ultra-high performance concrete (UHPC) as a grouting material for repair of deteriorated shear keys by testing bond strength between UHPC and substrate concrete surfaces that were either formed or scarified by chipping. Bond strengths were adequate for both surface textures even though texture depth was substantially less than recommended by ACI 546. Scanning electron microscopy has also been used to investigate the bonded area. This microscopic scanning has shown fly ash residue remaining on the substrate after bond failure, indicating that the supplementary cementitious materials produce much of the bond. Ongoing work for this project also includes full-scale testing of UHPC shear keys between pre-stressed channel girders.

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Xiong, Ming-Xiang, and J. Y. Richard Liew. "Spalling behavior and residual resistance of fibre reinforced Ultra-High performance concrete after exposure to high temperatures." Materiales de Construcción 65, no. 320 (November 10, 2015): e071. http://dx.doi.org/10.3989/mc.2015.00715.

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Bae, B. I., Hyun Ki Choi, and Chang Sik Choi. "Ductility of Ultra-High Performance Concrete and its Correlation with Tensile Strength Increase." Key Engineering Materials 665 (September 2015): 21–24. http://dx.doi.org/10.4028/www.scientific.net/kem.665.21.

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In this study, ductility of members with ultra-high performance concrete was investigated using moment-curvature analysis for the verification of safety under large deformation of ultra-high performance concrete structural members. For the analysis of members with ultra-high performance concrete, mathematical stress-strain model was selected among the results conducted by other researchers on the compressive and tensile behavior of high strength concrete and fiber reinforced concrete. According to the investigation on ductility of members with ultra-high performance concrete, decrease of ductility was observed with increase of tensile strength of concrete under the same reinforcement ratio. Members with 2~3% of reinforcement ratio, which usually be used in the field engineering, show the decrease of ductility with increase of fiber volume fraction. As a results of parametric study, limitation of maximum reinforcement ratio ( or limitation of net tensile strain ) suggested by current design code is not safe when using ultra-high performance concrete.

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Chen, Baochun, Jialiang Zhou, Dong Zhang, Khaled Sennah, and Camillo Nuti. "Shear performances of reinforced ultra-high performance concrete short beams." Engineering Structures 277 (February 2023): 115407. http://dx.doi.org/10.1016/j.engstruct.2022.115407.

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Hu, Yuqing, Huiguang Yin, Xiaomeng Ding, Shuai Li, and JQ Wang. "Shear behavior of large stud shear connectors embedded in ultra-high-performance concrete." Advances in Structural Engineering 23, no. 16 (July 9, 2020): 3401–14. http://dx.doi.org/10.1177/1369433220939208.

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In this article, the static shear behavior of large-headed studs embedded in ultra-high-performance concrete was investigated by push-out test and numerical analysis. A total of nine push-out specimens with single and grouped studs embedded in ultra-high-performance concrete and normal strength concrete slabs were tested. In the testing process, only shank failure appeared without cracks occurring on the surface of ultra-high-performance concrete slab when the steel–ultra-high-performance concrete specimens reached ultimate shear capacity. The shear capacity of specimens with large studs embedded in ultra-high-performance concrete slab increased by 10.6% compared those in normal concrete, and the current design codes such as Eurocode4, AASHTO LFRD 2014, and GB50017-2003 all underestimate the shear capacity of such kind of steel–ultra-high-performance concrete composite structures according to experimental results. Numerical models were established using ABAQUS with introducing damage plasticity material model. The influence of stud diameter, concrete strength, thickness of clear cover, and spacing of studs on the static shear behavior was thoroughly investigated via parametric analysis. Based on the experimental and numerical analysis, the existence of wedge block and the decrease of axis force are beneficial for improving the shear capacity of stud shear connectors.

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Liu, Shu Hua, Zhi Yang Gao, and Mei Juan Rao. "Study on the Ultra High Performance Concrete Containing Limestone Powder." Advanced Materials Research 250-253 (May 2011): 686–89. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.686.

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A new kind of ultra high performance concrete containing limestone powder was studied in this paper. The results show that the compressive strength of the ultra high performance concrete containing limestone powder is higher than 120MPa; the hydration activity and the accelerating effect of limestone powder are obvious under the condition of high temperature. The limestone powder hydrated and formed calcium monocaboaluminate hydrates. The cost would be reduced when adding certain amount of limestone powder when confect ultra high performance concrete. It is economical and feasible.

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Teng, Jin-Guang, Yu Xiang, Tao Yu, and Zhi Fang. "Development and mechanical behaviour of ultra-high-performance seawater sea-sand concrete." Advances in Structural Engineering 22, no. 14 (July 3, 2019): 3100–3120. http://dx.doi.org/10.1177/1369433219858291.

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Ultra-high-performance concrete is typically defined as an advanced cementitious material that has a compressive strength of over 150 MPa and superior durability. This article presents the development of a new type of ultra-high-performance concrete, namely, ultra-high-performance seawater sea-sand concrete. The development of ultra-high-performance seawater sea-sand concrete addresses the challenges associated with the shortage of freshwater, river-sand and coarse aggregate in producing concrete for a marine construction project. When used together with corrosion-resistant fibre-reinforced polymer composites, the durability of the resulting structures (i.e. hybrid fibre-reinforced polymer–ultra-high-performance seawater sea-sand concrete structures) in a harsh environment can be expected to be outstanding. The ultra-high strength of ultra-high-performance seawater sea-sand concrete and the unique characteristics of fibre-reinforced polymer composites also offer tremendous opportunities for optimization towards new forms of high-performance structures. An experimental study is presented in this article to demonstrate the concept and feasibility of ultra-high-performance seawater sea-sand concrete: ultra-high-performance seawater sea-sand concrete samples with a 28-day cube compressive strength of over 180 MPa were successfully produced; the samples were made of seawater and sea-sand, but without steel fibres, and were cured at room temperature. The experimental programme also examined the effects of a number of relevant variables, including the types of sand, mixing water and curing water, among other parameters. The mini-slump spread, compressive strength and stress–strain curve of the specimens were measured to clarify the effects of experimental variables. The test results show that the use of seawater and sea-sand leads to a slight decrease in workability, density and modulus of elasticity; it is also likely to slightly increase the early strength but to slightly decrease the strengths at 7 days and above. Compared with freshwater curing, the seawater curing method results in a slight decrease in elastic modulus and compressive strength.

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Ojha, P. N., Piyush Mittal, Abhishek Singh, Brijesh Singh, and V. V. Arora. "Optimization and evaluation of ultra high-performance concrete." Journal of Asian Concrete Federation 6, no. 1 (June 30, 2020): 26–36. http://dx.doi.org/10.18702/acf.2020.6.6.26.

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Echavarría, César, Hernán Cañola, and Wilmar Echeverri. "Analysis of bolted ultra-high performance concrete joints." Lámpsakos, no. 24 (March 16, 2021): 15. http://dx.doi.org/10.21501/21454086.3715.

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El hormigón de ultra-alto desempeño (UHPC) es un material compuesto con una notable capacidad de autocompactación y una alta resistencia a la compresión. Actualmente, la construcción de prefabricados en UHPC, debido a sus propiedades excepcionales, es considerada como una opción interesante en los proyectos de ingeniería civil. El desarrollo de métodos prácticos y confiables para el diseño de conexiones con pernos de elementos en UHPC ha sido considerado como un factor crucial en futuros proyectos de construcción. En este artículo, se estudian las concentraciones de tensión y los modos de falla frágiles en conexiones con pernos de paneles UHPC. Los resultados experimentales son comparados con una solución analítica que estima las concentraciones de tensión usando las propiedades elásticas de los materiales anisotrópicos y la geometría de las conexiones. Se analizan la influencia de la distancia al borde y de las propiedades elásticas de las placas UHPC en el desarrollo de fallas en conexiones con pernos. La solución analítica propuesta en esta investigación considera ecuaciones de forma cerrada que pueden ser usadas para evaluar las concentraciones de tensión en la conexión. Los resultados de laboratorio en conexiones con pernos de paneles UHPC se ajustan a las predicciones del modelo analítico. Un modelo analítico teórico es sin duda un precursor para cualquier estudio experimental o numérico de conexiones con pernos de elementos de hormigón de ultra-alto desempeño.

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Yang, Jian, and Zhi Fang. "Behavior of Prestressed Ultra High Performance Concrete Beams." Key Engineering Materials 400-402 (October 2008): 385–90. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.385.

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An experimental program was formulated to investigate the characteristics of complete stress-strain curve of UHPC in uniaxial compression and flexural behaviors of prestressed UHPC beams. The particular focus was the influence of the partial prestress ratio and jacking stress on the flexural response of UHPC beams. The tests of beams demonstrated that the UHPC beams have an excellent behavior in load carrying capacity, crack distribution and deformability; their ultimate deflection can reach 1/34～1/42 of the span. Based on this investigation, theoretical correlations for the prediction structure response of UHPC beams are proposed.

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Mohebbi, Alireza, and Benjamin Graybeal. "Prestress loss model for ultra-high performance concrete." Engineering Structures 252 (February 2022): 113645. http://dx.doi.org/10.1016/j.engstruct.2021.113645.

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47

Ojha, P. N., Piyush Mittal, Abhishek Singh, Brijesh Singh, and V. V. Arora. "Optimization and evaluation of ultra high-performance concrete." Journal of Asian Concrete Federation 6, no. 1 (June 30, 2020): 26–36. http://dx.doi.org/10.18702/acf.2020.6.6.1.26.

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48

Long, Wu Jian, Wei Lun Wang, Qi Ling Luo, and Bi Qin Dong. "Factorial Design Approach of Ultra-High Performance Concrete." Applied Mechanics and Materials 405-408 (September 2013): 2847–50. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.2847.

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In order to understand the influence of mixture parameters on ultra-high strength self-consolidating concrete (UHS-SCC) behaviour, an experimental design was carried out in this investigation. In total, 19 SCC mixtures were prepared to determine several key responses that affect the slump flow and compressive strength of UHS-SCC. The statistical models derived from the factorial design approach can be used to quantify the effect of mixture parameters and their coupled effects on fresh and mechanical properties of SCC.

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Kim, Sung-Wook, Sung Choi, Kwang-Myong Lee, and Jung-Jun Park. "Autogeneous Shrinkage Characteristics of Ultra High Performance Concrete." Journal of the Korea Concrete Institute 23, no. 3 (June 30, 2011): 295–301. http://dx.doi.org/10.4334/jkci.2011.23.3.295.

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50

Sovják, Radoslav, Filip Vogel, and Birgit Beckmann. "TRIAXIAL COMPRESSIVE STRENGTH OF ULTRA HIGH PERFORMANCE CONCRETE." Acta Polytechnica 53, no. 6 (December 31, 2013): 901–5. http://dx.doi.org/10.14311/ap.2013.53.0901.

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The aim of this work is to describe the strength of Ultra High Performance Concrete (UHPC) under triaxial compression. The main goal is to find a trend in the triaxial compressive strength development under various values of confinement pressure. The importance of triaxial tests lies in the spatial loading of the sample, which simulates the real loading of the material in the structure better than conventional uniaxial strength tests. In addition, the authors describe a formulation process for UHPC that has been developed without using heat treatment, pressure or a special mixer. Only ordinary materials available commercially in the Czech Republic were utilized throughout the material design process.

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