Concrete is one of the necessary elements for structural work in the modern construction. The material attributes are understood by studying the stress strain behaviour of uhpc. High toughness is achieved with the addition of fiber reinforcement. These steel grades are suitable for cold forming of structural and safetyrelated automotive components. It is a concrete mixture, which holds high durability and high strength when compared to conventional concrete. Reactive powder concrete rpc, as a one of uhsc types were studied. High strength concrete resists loads that cannot be resisted by normal strength concrete. This class of concrete has been demonstrated to facilitate solutions that address specific problems in the u.
Cip 33 high strength concrete what is high strength concrete. Pdf ultrahigh strength concrete mixtures using local. The strength, durability, resistance to chemical attack, and workability of high performance concrete are high. Ultra high performance concrete and advanced manufacturing methods for modular construction neet1 annual meeting september 29, 2015. Application of ultrahigh performance concrete to bridge.
Symposium on ultra high perform ance fiberreinforced concrete. High performance concrete seminar ppt with pdf report. One of the materials developed in recent years is ultra high strength concrete uhsc also known as reactive powder concrete rpc. 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.
The paper aims to develop theoretical expressions for the ductility design of very high strength concrete vhsc 100 mpa columns using curvature and a new flexural energybased ductility approach. This instantly reminded me of what creto deep penetrating sealer dps. Ultra high performance concrete has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability. Evaluation of ultrahighperformance fiberreinforced concrete. High strength concrete is defined based on its compressive strength at a given age whereas high performance concrete is defined based on performance criteria namely. Its mechanical properties were investigated and evaluated by.
Mechanical properties of ultrahigh performance fiber. Material property characterization of ultrahigh performance concrete publication no. Erdcgsl tr1522 impact of steel fiber size and shape on. Ultrahigh 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.
Ultra high performance concrete uhpc with a high compressive strength of more than. Concrete is the most widely used material in building construction. Ultra high strength concrete strength of materials concrete. Uhpc is a class of concrete defined by its exceptionally high flexural and compressive strength.
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. Ultra high strength fiber reinforced concrete using aramid. Ultra high performance concrete is a new type of concrete that is being developed by agencies concerned with infrastructure protection. Within the last few decades, research has been conducted on what is known as ultra high performance concrete uhpc. David bennett reports a break through in ultra high strength cement technology occurred in the 70s following two. 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.
The design recommendations herein are restricted to an upper limit to the characteristic cube strength of 105 nmm2. For the purposes of this document, uhpc is limited to concrete that has a minimum specified compressive strength of 22,000. Selfconsolidating ultra high performance concrete uhpc. High strength and high performance concrete materials and. Ultra high strength concrete uhsc is one of the most spectacular developments of recent years in the area of portland cementbased materials. Ultra high performance concrete uhpc is a class of advanced cementitious materials with greater strength, tensile ductility, and durability properties when compared to conventional or even high performance concrete. This report presents the development of ultra high performance concrete uhpc using locally available materials thatreduce construction costs compared with commercial products. Ultrahigh strength concrete, when restrained, may undergo thermal cracking due to excessive hydration heat when the water to binder ratio is as low as 0. The time period in which a specified strength should be achieved may range from a few 300 design and control of concrete mixtures eb001 table 171. The relatively high initial cost of uhpc has restricted its wider. The methodology to develop such mix has been explained. Reinforced with highcarbon metallic fibers, structural uhpc products can achieve compressive strengths up to 29,000 psi 200 mpa and flexural strengths up to 2,900 psi 20 mpa. In concrete society report 74, cementitious materials des king hon.
Ultrahigh performance concrete portland cement association. Uhpc is characterized by being a steel fibrereinforced cement composite material with compressive strengths in excess of 150 mpa, up to and possibly exceeding 250 mpa. 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. Recently, a new ultra high performance fiberreinforced concrete uhpc was introduced. Ultra high performance concrete ultra high performance concrete accidentally discovered when they added recycled, milled glass. When the term strength use with concrete it will express its compression strength how ever there is no specific classification limits according to strength but may be summarized as follow. Uhsc ultra high strength concrete this type of concrete is developed in the 1990s by bouygues laboratory in france. High compressive strength is achieved by the use of high cement dosage. 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. I came across this article talking about concrete being supplemented with milled glass being much stronger and more dense. The main activities for controlling quality on site are placing, compaction, curing and surface finishing. Silica fumes introduced for higher strength often result in larger.
In this regard, high strength concrete hsc is defined as concrete with a specified characteristic cube strength in excess of 60 nmm2. The possibility of achieving high strength, durability, and improved ductility with the use of ultra high strength concrete encourages researchers and engineers to use this modern material in many practical applications like nuclear waste containment structures, high rise structures, long span bridges, and walkways. The high strength level gives potential for considerable weight reduction and a costeffective way to. It is a type of high performance concrete generally with a specified compressive strength of 6,000 psi 40. Properties of cement mortar and ultrahigh strength. This material possesses a compressive strength greater than 21,750 psi 150 mpa. This high performance concrete can be utilized in structural rehabilitation and accelerated bridge construction in addition to several other applications.
Ultra high strength concrete free download as powerpoint presentation. Eventually, the study aims to evaluates the feasibility of vhsc columns for different ductility classes, considering the limitation of providing a higher volume of transverse reinforcement due to. High early strength concrete high early strength concrete, also called fasttrack concrete, achieves its specified strength at an earlier age than normal concrete. Pdf this paper presents the development of ultra high strength concrete uhsc using local materials. Ultrahigh performance concrete fhwa us department of. Pdf ultrahigh strength and performance concrete properties. Not only does high strength concrete allow for more applications, it also increases the strength per unit cost, per unit weight, and per unit volume as well. More than two decades of research work on high strength concrete. High strength could result in more economical structures through increasing span lengths, reducing the number of beam lines, and decreasing transportation and erection costs lane and podolny, 1993.
Ultrahigh strength concrete mixtures using local materials. The enhanced strength and durability properties of uhpc are mainly due to optimized. In the decade, buildings around the world have become higher and so the structural strength demand for concrete is increased, they require high strength. 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 include workability, selfplacing and selfdensifying properties, improved in mechanical and durability performance with very high compressive strength, and nonbrittleness behavior. High value concrete highstrength concrete materials 9.
Site experience indicates that more compaction is normally needed for high strength concrete with high. Ultrahigh performance concrete has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability compared to conventional and highperformance concretes. Ultrahigh performance concrete uhpc structures underwent fast development in. Ultra high performance concrete uhpc is an advanced construction material that affords new opportunities for the future of the highway infrastructure. Ultra high performance concrete uhpc is a new class of concrete that has superior performance characteristics compared to conventional concrete. Ultra high strength concrete uhsc is the latest spectacular development in the domain of portland cementbased materials. Ductility design of reinforced veryhigh strength concrete. It consists of a special concrete where its microstructure is optimized by precise gradation of all particles in the mix to yield maximum density. Ultrahigh performance concrete uhpc is a cementitious composite characterized by high compressive strength, typically greater than 120. Ultrahigh performance concrete uhpc, as a new cementbased material, is different from traditional high strength concrete hsc and steel. Ultra high performance concrete uhpc is a family of materials that typically exhibit compressive strengths in excess of 21,000 psi 150 mpa and high durability due to negligible interconnected porosity. Uhsc mixture proportions were developed using local materials so that uhsc may be made more. Ultrahigh performance concrete uhpc is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square. Mechanical properties of ultrahigh performance concrete.
Pdf on jun 1, 2011, ofelia corbu and others published ultrahigh strength and performance concrete properties find, read and cite all the. There are several advantages of high performance concrete hpc application in building construction which are not achievable using conventional concrete. 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. Uhpc formulations generally consist of a high cementitious content.
The mechanical properties of uhpc include compressive strength greater than 21. The term ultrahigh performance concrete uhpc refers to a relatively new class of advanced. So, high performance concrete is superior to ordinary concrete in all properties. The mechanical properties such as compressive strength, split tensile strength, youngs modulus of elasticity and flexural strength of ultrahigh strength concrete. Ultra high strength concrete strength of materials. One such example is ultrahigh strength fiber reinforced concrete ufc having excellent fluidity with a low waterbinder ratio, which achieves an ultra high compressive strength exceeding 180 nmm 2. Repair of steel beamgirder ends with ultra high strength concrete phase ii spr 5. Manufacture of highstrength concrete involves making optimal use of the basic ingredients that constitute normal strength concrete. 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. Pdf mechanical properties of ultra high performance. Civil engineering animated videos, civil engineering videos social m. Normal strength concrete 10 mpa 40 mpa high strength concrete 40 mpa 100 mpa ultra high strength concrete. Authors arash esmaili zaghi, kay wille, kevin zmetra, kevin mcmullen, dominic kruszewski, and alexandra hain 8.
This page contains high performance concrete seminar and ppt with pdf report. High performance concrete seminar and ppt with pdf report. The material properties, mix design and curing regime are determined. Pdf ultrahigh strength concrete mixtures using local materials. With the aim of achieving a specified compressive strength of 20 ksi, a uhpc mixture is formulated. Repair of steel beamgirder ends with ultra highstrength. Nanosilica, ultra high strength concrete, silica fume, binder content introduction concrete is a highly heterogeneous material produced by mixture of finely powdered cement, aggregates of various sizes and water with inherent physical, chemical and mechanical properties. Initially this new type of concrete, developed by pierre richard, the former scientific director of the french bouygues company, was known as reactive powder concrete rpc richard and cheyrezy, 1994.
Mdf and dsf the new ultra high strength concretes a new generation of ultra high strength concretes has been developed to rival the properties of metal. This paper presents the development of ultra high strength concrete uhsc using local materials. Uhsc mixture proportions were developed using local materials so that uhsc may be made more affordable to a wider variety of applications. The term includes a broad range of materials such as defectfree, dense particle, engineered composite, multiscale particle, and fiberreinforced cementitious. Over the last twenty years, remarkable advances have taken place in the research and application of ultra high performance concrete uhpc, which exhibits outstanding mechanical properties and.
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