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. 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. 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. High value concrete highstrength concrete materials 9. Ultrahigh performance concrete has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability compared to conventional and highperformance concretes. Ultrahigh performance concrete fhwa us department of. The enhanced strength and durability properties of uhpc are mainly due to optimized. With the aim of achieving a specified compressive strength of 20 ksi, a uhpc mixture is formulated. Reactive powder concrete rpc, as a one of uhsc types were studied. 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. High strength concrete and high performance concrete are not synonymous because strength and performance of concrete are different properties of concrete. The high strength level gives potential for considerable weight reduction and a costeffective way to. Ultrahigh performance concrete portland cement association. 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.
High compressive strength is achieved by the use of high cement dosage. 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. Evaluation of ultrahighperformance fiberreinforced concrete. David bennett reports a break through in ultra high strength cement technology occurred in the 70s following two. For the purposes of this document, uhpc is limited to concrete that has a minimum specified compressive strength of 22,000. Ultra high performance concrete ultra high performance concrete accidentally discovered when they added recycled, milled glass. The term ultrahigh performance concrete uhpc refers to a relatively new class of advanced. This research aims to investigate and evaluate an ultra high strength concrete uhsc cast using economical materials. Uhpc is a class of concrete defined by its exceptionally high flexural and compressive strength. High early strength concrete high early strength concrete, also called fasttrack concrete, achieves its specified strength at an earlier age than normal concrete. Producers of highstrength concrete know what factors affect compressive strength and know how to manipulate those factors to achieve the required strength.
More than two decades of research work on high strength concrete. Civil engineering animated videos, civil engineering videos social m. Ultra high performance concrete and advanced manufacturing methods for modular construction neet1 annual meeting september 29, 2015. Ultra high strength concrete uhsc is one of the most spectacular developments of recent years in the area of portland cementbased materials. Ultra high strength fiber reinforced concrete using aramid. Properties of cement mortar and ultrahigh strength. 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. Repair of steel beamgirder ends with ultra high strength concrete phase ii spr 5. Recently, a new ultra high performance fiberreinforced concrete uhpc was introduced. Selfconsolidating ultra high performance concrete uhpc. This page contains high performance concrete seminar and ppt with pdf report. Ultrahigh performance concrete uhpc is a cementitious composite characterized by high compressive strength, typically greater than 120. The design recommendations herein are restricted to an upper limit to the characteristic cube strength of 105 nmm2.
This class of concrete has been demonstrated to facilitate solutions that address specific problems in the u. The methodology to develop such mix has been explained. Within the last few decades, research has been conducted on what is known as ultra high performance concrete uhpc. Silica fumes introduced for higher strength often result in larger. Concrete is the most widely used material in building construction. It is a concrete mixture, which holds high durability and high strength when compared to conventional concrete. Material property characterization of ultrahigh performance concrete publication no.
Fhwahrt06103 august 2006 research, development, and technology turnerfairbank highway research center 6300 georgetown pike mclean, va 221012296. The main activities for controlling quality on site are placing, compaction, curing and surface finishing. 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. Ultra high performance concrete uhpc is a new class of concrete that has superior performance characteristics compared to conventional concrete.
Uhpc is a range of formulations which may be used for many different architectural and structural applications. Ultrahigh strength concrete mixtures using local materials. These steel grades are suitable for cold forming of structural and safetyrelated automotive components. 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.
Mechanical properties of ultrahigh performance concrete. Ultra high performance concrete uhpc with a high compressive strength of more than. Its mechanical properties were investigated and evaluated by. 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. This instantly reminded me of what creto deep penetrating sealer dps. Ultra high strength concrete strength of materials. 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. Experimental testing of resistance of ultrahigh performance. Pdf this paper presents the development of ultra high strength concrete uhsc using local materials. Erdcgsl tr1522 impact of steel fiber size and shape on. The term includes a broad range of materials such as defectfree, dense particle, engineered composite, multiscale particle, and fiberreinforced cementitious. So, high performance concrete is superior to ordinary concrete in all properties. Ultra high strength concrete free download as powerpoint presentation.
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. Symposium on ultra high perform ance fiberreinforced concrete. High strength and high performance concrete materials and. In concrete society report 74, cementitious materials des king hon. High strength concrete resists loads that cannot be resisted by normal strength concrete. Normal strength concrete 10 mpa 40 mpa high strength concrete 40 mpa 100 mpa ultra high strength concrete. Pdf ultrahigh strength concrete mixtures using local.
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. Concrete is one of the necessary elements for structural work in the modern construction. 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. Uhsc mixture proportions were developed using local materials so that uhsc may be made more. The material attributes are understood by studying the stress strain behaviour of uhpc. 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. High performance concrete seminar ppt with pdf report. This report presents the development of ultra high performance concrete uhpc using locally available materials thatreduce construction costs compared with commercial products. This material possesses a compressive strength greater than 21,750 psi 150 mpa. The strength, durability, resistance to chemical attack, and workability of high performance concrete are high. This video animation, animated video explains the concept of high strength concrete. The material properties, mix design and curing regime are determined.
Ultra high performance concrete is a new type of concrete that is being developed by agencies concerned with infrastructure protection. Cip 33 high strength concrete what is high strength concrete. 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. Authors arash esmaili zaghi, kay wille, kevin zmetra, kevin mcmullen, dominic kruszewski, and alexandra hain 8. 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.
Ultra high strength concrete strength of materials concrete. 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. It is a type of high performance concrete generally with a specified compressive strength of 6,000 psi 40. Ultrahigh performance concrete uhpc is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square. This paper presents the development of ultra high strength concrete uhsc using local materials. Application of ultrahigh performance concrete to bridge. There are several advantages of high performance concrete hpc application in building construction which are not achievable using conventional concrete. 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.
High toughness is achieved with the addition of fiber reinforcement. Mechanical properties of ultrahigh performance fiber. 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. It is observed that mechanical properties are on higher. Manufacture of highstrength concrete involves making optimal use of the basic ingredients that constitute normal strength concrete. 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. This high performance concrete can be utilized in structural rehabilitation and accelerated bridge construction in addition to several other applications. Ultra high strength concrete uhsc is the latest spectacular development in the domain of portland cementbased materials. 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 mechanical properties of uhpc include compressive strength greater than 21. 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. Site experience indicates that more compaction is normally needed for high strength concrete with high.
One of the materials developed in recent years is ultra high strength concrete uhsc also known as reactive powder concrete rpc. 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. Pdf ultrahigh strength and performance concrete properties. I came across this article talking about concrete being supplemented with milled glass being much stronger and more dense. High performance concrete seminar and ppt with pdf report. Pdf mechanical properties of ultra high performance. Ultra high performance concrete has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability. 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. The mechanical properties such as compressive strength, split tensile strength, youngs modulus of elasticity and flexural strength of ultrahigh strength concrete.
In the decade, buildings around the world have become higher and so the structural strength demand for concrete is increased, they require high strength. In this regard, high strength concrete hsc is defined as concrete with a specified characteristic cube strength in excess of 60 nmm2. Uhpc formulations generally consist of a high cementitious content. The relatively high initial cost of uhpc has restricted its wider. 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. Uhsc ultra high strength concrete this type of concrete is developed in the 1990s by bouygues laboratory in france. 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. Ultrahigh performance concrete uhpc structures underwent fast development in. Pdf ultrahigh strength concrete mixtures using local materials.
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