Civil engineering animated videos, civil engineering videos social m. The test results show that at room temperature, the 56day compressive strength of the uhpc1 mix was 155. In this paper we propose a model to evaluate the compressive. Longterm performance of structures has become vital to the. High performance concrete is a concrete mixture, which possess high durability and high strength when compared to conventional concrete. Fhwahrt60 june 20 research, development, and technology turnerfairbank highway research center 6300 georgetown pike mclean, va 221012296 coverhrt. Evaluation of ultrahighperformance fiberreinforced concrete. Introduction high performance concrete hpc should have at least one property like high strength, high durability, acid resistance, selfcompaction, low permeability to water, chemicals or other aggressive media, as compared to normal concrete, to qualify as hpc. The term ultrahigh performance concrete uhpc refers to a relatively new class. Highstrength concrete pennsylvania state university. Material property characterization of ultra high performance concrete 6. For new construction or repairs where concrete thickness exceeds 2 inches, you.
Ultrahigh performance concrete uhpc, as a new cementbased material, is different from traditional high strength concrete hsc and steel. High performance concrete is a concrete having high strength, high durability, high resistance to chemical attack and high workability. High performance concrete is a concrete in which certain characteristics are developed for a particular application and environment, so that it will give excellent performance in the structure in which it will be placed. Highperformance concrete hpc exceeds the properties. High density concrete, high strength concrete and high performance concrete.
Highperformance concrete has been primarily used in tunnels, bridges, and tall buildings for its strength, durability, and high modulus of elasticity fig. Concrete is the most widely used construction material in india with annual consumption exceeding 100 million cubic meters. There are several advantages of high performance concrete hpc application in building construction which are not achievable using conventional concrete. This page contains high performance concrete seminar and ppt with pdf report. Cip 33 high strength concrete what is high strength concrete it is a type of high performance concrete generally with a specified compressive strength of 8,000 psi 55 mpa or greater. However, high performance concrete is made with cement, fly ash and plasticizers which decreases the specific density of the concrete admixture resulting in highest possible strength of the concrete. Pdf material aspects for highstrength high performance concrete.
The results show that partial cement replacement up to 20% produce, higher compressive strengths than control concretes, nevertheless the strength gain is less than 15%. A stateoftheart report for the bridge community publication no. Introduction high performance concrete hpc is a concrete mixture, which possess high durability and high strength when compared to conventional concrete. 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. Highperformance concrete almost always has a higher strength than normal concrete. Pdf highstrength highperformance lightweight concrete. High performance concrete hpc can go a long way in addressing concerns about providing more durable and longer lasting concrete as well as meeting strength and other performance related criteria. 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. Fhwa report fhwahrt06103 material property characterization of ultra high performance concrete.
It is a concrete mixture, which holds high durability and high strength when compared to conventional concrete. This report details the laboratory developmental work on producing high performance concrete for highway applications. Uhpc is being considered for use in a wide variety of highway infrastructure applications. Advanced cementitious material high strength, high. Portland cement, coarse and fine sand can be replaced with plasticizers to accelerate the strength gaining process of admixture and reduce the. In this respect, the guidance and recommendations in the concrete society technical report 49 are very relevant. Fatigue test results indicate that higher allowable tensile stresses for hpc can be used if the concrete remains uncracked. High performance concrete is necessary for the construction of high rise building and long span bridges.
Hrm has been introduced to be a beneficial alternative for silica fume, required in the formulation of high strengthperformance. Pdf strength and durability of high performance concrete. For example, a normal strength concrete with very high durability and very low permeability is considered to have highperformance properties. Recently, a new ultra high performance fiberreinforced concrete uhpc was introduced. Using high strength concrete or highperformance concrete with a low wb ratio in structural applications is more sustainable than normal strength concrete. For the purposes of this specification, high performance concrete hpc is considered as concrete engineered to meet specific needs of a project. High performance concrete hpc is more homogeneous than normal strength concrete nsc. Mechanical properties of ultrahigh performance concrete. High strength and high performance concrete materials and. The book will be valuable for all concrete technologists and construction engineers wishing to take. Advantages disadvantages pennsylvania state university. A substantial reduction of quantity of mixing water is the. Highstrength concrete is defined based on its compressive strength at a given age whereas highperformance concrete is defined based on performance criteria namely. A pdf file on high performance concrete giving full details about high performance concrete, their use,advantages,disadvantages,strength.
Compressive strength 18 to 35 ksi modulus of elasticity 6200 to 8000 ksi creep coefficient 0. Highperformance concrete an overview sciencedirect topics. Sakrete highstrength concrete mix is a preblended mixture of sand, coarse aggregate, and cementitious materials. Guide specification for high performance concrete for bridges. In order to know the intrinsic differences between normal type concrete and high performance concrete, microstructure and composition of hpc are studied. It is a type of high performance concrete generally with a specified compressive strength of 6,000 psi 40.
Since rheological parameters and compressive strength are fundamental properties of concrete in two. Ultrahigh performance concrete fhwa transportation. Pdf high performance concrete by pierreclaude aitcin. High performance concrete seminar ppt with pdf report. High strength concrete is specified where reduced weight is important or where architectural considerations call for small support elements. Using high strength concrete or high performance concrete with a low wb ratio in structural applications is more sustainable than normal strength concrete. Third, allowable stress design discourages the use of high strength concrete. Workability characteristics of the fresh concrete are analyzed and hardened concrete properties tested in this research are compressive strength, chloride ion permeability, and creep and drying shrinkage properties.
Constitutive modelling for high strength high performance concrete. High performance means that the concrete has one or more of the following properties. Highperformance concrete may be defined as concrete with strength and durability significantly beyond those obtained by normal means. High density concrete, high strength concrete and high.
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. This video animation, animated video explains the concept of high strength concrete. To call concrete high performance implies that it is specialized. Development of high performance concrete and evaluation of. The compressive strength of silica fume concretes was investigated at low watercementitious materials ratios with a naphthalene sulphonate superplasticizer. Ultrahigh performance concrete fhwa us department of. However, strength is not always the primary required property. Pdf the merits of highstrength high performance concrete hshpc depend on the quality of constituent materials.
The guide is intended to provide safe design guidance, based on the best available information, especially in the areas not adequately covered by cp65. High strength concrete girders incorporating midspan flexural cracks can be expected to perform adequately under fatigue loading conditions when extreme fiber tensile stress is limited to the current allowable level. High strength concrete is defined based on its compressive strength at a given age. High performance concrete is defined as concrete with much higher early strength and greatly enhanced durability against freezing and thawing in comparison with conventional concrete. High strength concrete and high performance concrete are not synonymous because strength and performance of concrete are different properties of concrete. The merits of highstrength high performance concrete hshpc depend on the quality of constituent materials. It has also been used in shotcrete repair, poles, parking garages, and agricultural applications. For better workability, durability, high tensile strength, environment friendly material, modern world accepting high performance concrete quickly. Pdf material aspects for highstrength high performance. These materials may cost more than materials of lower quality. High performance concrete an overview sciencedirect topics. For the purposes of this document, uhpc is limited to concrete that has a minimum specified compressive strength of 22,000. Bickley and fung 2001 demonstrated that 40 mpa 6,000 psi high. Today compressive strengths exceeding 20,000 psi 140 mpa have been used in castinplace buildings.
The compressive strength of highperformance concrete and. The definition of high performance concrete utilized for the project includes high strength concrete, workability, and durability. By carrying loads more efficiently than normal strength concrete, high strength concrete also reduces the total amount of material placed and lowers the overall cost of the structure. Aci, aashto, code developments, high performance concrete, high strength concrete, nchrp.
The use of this quality mixture, ensuring your finished project will last you for years to come. The constituent materials play the vital roles to improve the performance of hshpc. A mix design procedure for high performance concrete mixes has been presented in this paper. Hpc does not simply mean high strength concrete hsc, but also includes other enhanced material properties such as earlyage strength, increased flow ability, high modulus of elasticity moe, low permeability, and resistance to chemical and physical. High performance concrete seminar and ppt with pdf report. Introduction it is important to note the high strength and high. High performance concrete is also a high strength concrete but it has a few more attributes specially designed for high range of properties. High density concrete high densityheavyweight density should be more than 2600 kgm3 dens crete offers more strength can be used everywhere, in all construction practices. During 1970s, any concrete mixtures which showed 40 mpa or more compressive strength at 28 days were.
High strength concrete must meet high performance standards consistently in order for it to be effective. Ultra high performance concrete has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability compared to conventional and high performance concretes. Conference paper pdf available august 2011 with 2,233 reads. Densification and strengthening of the transition zone, many desirable properties can be improved. Cp65 but who have little or no experience of high strength concrete hsc. It covers all aspects of hpc from materials, properties and technology, to construction and testing. Highstrength concrete and highperformance concrete are not synonymous because strength and performance of concrete are different properties of concrete. In other words all the mechanical properties of concrete are superior in a high performance concrete. This concrete contains one or more of cementious materials such as fly ash, silica fume or ground granulated blast furnace slag and usually a super plasticizer.
On the other side cost of concrete is attributed to the. Properties of highperformance concrete containing high. Materials and methods for high performance concrete. High strength concrete and high performance concrete happho. According to henry russell, aci defines high performance concrete as concrete that meets special performance and uniformity requirements that cannot always be achieved routinely.
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