In order to study the direct shear properties of ultrahigh performance concrete uhpc structures, 15 zshaped monolithic placement specimens mpss and 12 zshaped waterjet treated specimens wjtss were tested to study the shear behavior and failure modes. Ductility of ultrahigh performance concrete and its. Uhpc was first developed in the early 1980s and since then has been used for applications needing exceptional strength and durability like nuclear power plants, thinprofile bridges, structural beams and seawall anchor plates. Ultrahigh performance concrete uhpc is a novel con. The material properties, mix design and curing regime are determined. Its performances allow a wide range of applications, from the most demanding structural ones bridges, walkways, stairs, roofs, to the most. Experimental study on shear performance of castinplace. During 1970s, any concrete mixtures which showed 40 mpa or more compressive strength at 28 days were. Highperformance concrete is also a highstrength concrete. Ultra high performance concrete uhpc is part of fhwas every day counts intended to highlight some advantages of accelerated project delivery and longterm durability minimizing repairs and future disruption to traffic. The relatively high initial cost of uhpc has restricted its wider. The filling consists of concrete of a wide strength range. Aci materials journaljanuary 2018 129 aci matias jna tchnica a in this study, lightweight sand is used as an internal curing agent in ultrahighperformance concrete uhpc. Bond of reinforcement in ultrahighperformance concrete.
Research on fire resistance of ultrahighperformance concrete. The methodology to develop such mix has been explained. Over the last twenty years, remarkable advances have taken place in the research and application of ultrahigh performance concrete uhpc, which exhibits excellent rheological behaviors that include workability, selfplacing and selfdensifying properties, improved in mechanical and durability performance with very high compressive strength, and. Ultrahighperformance fiberreinforced concrete, aci materials journal. Information about the openaccess article research on fire resistance of ultrahighperformance concrete in doaj.
Pdf mechanical properties of ultra high performance. The compressive strength of highperformance concrete and. Both the fhwa and fdot support the use of accelerated project delivery techniques such as uhpc and prefabricated bridge elements and systems pbes as an economical. Federal highway administration s ultrahigh performance concrete uhpc research and development program has produced a range of publications pertaining to the performance and use of uhpc. Ultrahigh performance concrete publications ultrahigh. The objective of this study is to analyse the performance of microsilica and fly ash in concrete when it is mixed in cement concrete for workability and strength of concrete using opc 53 grade.
Pdf high performance concrete ijirst international. In this study, ductility of members with ultrahigh performance concrete was investigated using momentcurvature analysis for the verification of safety under large deformation of ultrahigh performance concrete structural members. The load was applied exclusively on the concrete sections so that the load bearing behavior of the confined concrete core could be tested. Performance of grouted connections for prefabricated bridge deck elements. I came across this article talking about concrete being supplemented with milled glass being much stronger and more dense. This high performance concrete can be utilized in structural rehabilitation and accelerated bridge construction in addition to several other applications. The effects of steel fiber shape, steel fiber volume fraction and interface treatment on the direct shear properties of uhpc were. How do we gain benefits of ultrahighperformance concrete uhpc in arizona bridge projects without the high cost of proprietary mixes. Uhpc is a class of concrete defined by its exceptionally high flexural and compressive strength.
Ultra high performance concrete uhpc is a new class of concrete that has been developed in recent decades for its exceptional properties of strength and durability. Rehabilitation and strengthening of concrete structures. Application of ultrahigh performance concrete in bridge engineering in china baochun chen, mingzhe an, qingwei huang, hwaichung wu, wenjin huang, qiu zhao 2 the cross section, and could be cut with a saw for the sake of construction convenience. With advances in concrete technology, ultra high performance concrete uhpc has become a new focus for researchers and the concrete industry. Development of ultrahigh performance concrete against. In order to make uhpc structures more ductile and costeffective. Ultrahigh performance concrete portland cement association. Engineers are using ultrahigh performance concrete, or uhpc, to design bridges that are more constructible, durable, and resilient. Mohamed, mahmoud khater, sayed ahmed department of structural engineering, faculty of engineering, zagazig university, zagazig, egypt. In 2011, acis technical activities committee approved formation of aci committee 239, ultrahigh performance concrete. The material attributes are understood by studying the stress strain behaviour of uhpc. Flexural behavior of an ultrahighperformance concrete igirder benjamin a.
Ultrahigh performance concrete uhpc is a novel construction material exhibiting enhanced mechanical and durability properties, which can lead to economical construction through reducing the crosssections of structural members with associated materials savings and lower installation and labor costs tang 2004. Fhwa uhpc is a cementitious composite material composed of an optimized gradation of granular constituents, a watertocementitious materials ratio less than 0. Uhpc 101 ben graybeal, fhwa february 2017 what is ultrahigh performance concrete. Ultra high performance concrete concrete engineering. The paper proposes a method for predicting the flexural strength of prestressed uhpc beams with a compressive strength greater than 150 mpa, including an experimental program and associated numerical analyses. High strength and high performance concrete materials and. The maximum compressive strength of dsp can reach up to 345 mpa.
Numerical modeling for damaged reinforced concrete slab strengthened by ultrahigh performance concrete uhpc layer. Ultra high performance concrete free download as powerpoint presentation. A research program is conducted to evaluate the mechanical properties of ultra high performance concrete, target compressive strength at the age of 28 days being more than 150 mpa. Ultrahigh performance concrete uhpc is an advanced construction material that affords new opportunities for the future of the highway infrastructure.
Parameters varied among the prestressed specimens and included the removal of all mild steel reinforcement and the effect of a composite castinplace concrete deck. A costeffective, nonproprietary uhpc mix or mixes for use in bridge element connections during accelerated bridge construction abc under arizona conditions. Highperformance concrete specifications ideally should be performance oriented. View ultrahigh performance concrete research papers on academia. Ultrahigh performance concrete uhpc is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square. For instance, reducing of construction time and construction material, construction quality improving, environmental. Ultrahigh performance concrete fhwa us department of. International journal of concrete structures and materials. Highstrength concrete is defined based on its compressive strength at a given age. Over the last twenty years, remarkable advances have taken place in the research and application of ultra high performance concrete uhpc, which exhibits excellent rheological behaviors that. Table 172 lists properties that can be selected for highperformance concrete. Pdf development of ultrahigh performance concrete with locally. A study has been made through this investigation to understand the behavior of uhpc members with steel fibers by using two approaches. The flexural behavior of prestressed ultra high performance concrete uhpc beams is investigated in this study.
An original concept is presented for the durable rehabilitation and strengthening of concrete structures. Chapters present case studies on the novel development of the new generation of uhpc with nano additives. Flexural strength of largescale ultra high performance. Ultra high strength concrete uhsc is the latest spectacular development in the domain of portland cementbased materials. International journal of engineering and innovative technology ijeit volume 4, issue 4, october 2014 4 mechanical properties of ultrahigh performance fiber reinforced concrete hamdy k. Uhpc is characterized by high compressive strength and excellent durability properties resulting in lighter structures and longer life. High strength concrete and highperformance concrete are not synonymous because strength and performance of concrete are different properties of concrete. Kenai, silica fume effect on hydration heat and compressive strength of highperformance concrete, aci journal of materials, pp. The term ultrahigh performance concrete uhpc refers to a relatively new class of advanced cementitious composite materials whose mechanical and durability properties far surpass those of conventional concrete. The relatively high initial cost of uhpc has restricted its wider use in the. The term ultrahigh performance concrete uhpc refers to a relatively new. Article pdf available in case studies in construction materials 9 september 2018. Nowadays, highperformance concrete hpc and ultrahighperformance concrete uhpc are ranked among advanced concrete technologies.
Ultra high performance concrete uhpc is a milestone in concrete technology and application. For the analysis of members with ultrahigh performance concrete, mathematical stressstrain model was selected among the results conducted by other researchers on. This article provides a comprehensive environmental assessment within life cycle assessment lca boundaries for ultrahighperformance concrete uhpc in comparison with conventional concrete cc, in terms of carbon, material, and water footprint. It permits the construction of both more slender and more durable concrete structures with a prolonged service life and thus improved sustainability. Flexural behavior and analysis of prestressed ultrahigh. National precast concrete association 3 introduction a s a material on the leading edge of concrete innovation, ultra high performance concrete uhpc provides a new technology to expand a precasters business with new products and solutions. Development of ultrahigh performance concrete against blasts. Ultrahigh performance concrete research papers academia. International research journal of engineering and technology irjet eissn. Not all properties can be achieved at the same time. Article in australian journal of civil engineering 21. This video highlights the mechanical and durability properties. Structures design office ultra high performance concrete. Unfortunately, many specifications are a combination of performance.
Impact resistance of a sustainable ultrahigh performance fibre reinforced concrete uhpfrc under pendulum impact loadings r. Receive an update when the latest issues in this journal are published. Laboratory punching shear tests on small slabs with macrofibers without bars by a. There is a common understanding that the environmental impacts of construction materials should be significantly reduced. Normal strength concrete ns 36mpa, high strength concrete hs 96mpa and ultra high performance concrete uhpc 160mpa were used.
Though ultra highperformance concrete uhpc is generally expensive, a university of michigan professor has concocted a nonproprietary blend at. Ultrahighperformance concrete uhpc is a relatively new class of advanced cementitious composite materials, which exhibits high compressive above 21. Behavior of ultra high performance concrete structures. Application of uhpc in bridge engineering in chinafzu. Pdf ultra high performance concrete uhpc hai hoang viet. Hpc is a concrete mixture which possess high workability, high strength, high modulus of elasticity, high density, high dimensional stability, low permeability and resistance to chemical attack. Ultra high performance concrete uhpc is a novel construction material exhibiting enhanced mechanical and durability properties, which can lead to economical construction through reducing the crosssections of structural members with associated materials savings and lower installation and labor costs tang 2004. The main idea is to use ultrahigh performance fibre reinforced concrete uhpfrc complemented with steel reinforcing bars to protect and strengthen those zones of the structure that are exposed to severe environmental influences and high mechanical loading. Mechanical properties of ultrahigh performance fiber. Ultrahigh performance concrete ultrahigh performance concrete accidentally discovered when they added recycled, milled glass.
Flexural behavior of an ultrahighperformance concrete i. From materials to structures presents a detailed overview of uhpc development and its related applications in an era of rising terrorism around the world. Ultra high performance concrete uhpc is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square inch 120 mpa with specified durability, tensile ductility and toughness requirements. Over the past 30 years, a wide range of ultrahighperformance concrete uhpc products and solutions have been developed and implemented on hundreds of structural and architectural projects in numerous countries. The application of the mentioned advanced technologies may have potential to improve the construction efficiency from several points of view. Ultrahigh performance concrete uhpc is promising in construction of concrete structures that suffer impact and explosive loads. Impact resistance of a sustainable ultrahigh performance. Efforts are to improve and develop high performance. The federal highway administration has been engaged in research on the optimal uses of uhpc in the highway bridge infrastructure since 2001 through its bridge of the future initiative. Dsp concrete contains high amount of sp and sf, it also uses heat and pressure curing.
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