High performance concrete hpc exceeds the properties and constructability of normal concrete. High performance concrete hpc it is very important to follow the manufacturers care and maintenance guide to retain your products warranty. While all high strength concrete is also high performance, not all high performance concrete is high strength. High performance concrete has several advantages like improved durability characteristics and much lesser micro cracking than normal strength concrete. A pdf file on high performance concrete giving full details about. 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 performancerelated criteria. Highperformance concrete an overview sciencedirect topics.
For instance, cement with low c3a is the most desired type of cement to produce highperformance concrete because the c3a creates incompatibility of cement with a. Normal and spe cial materials are used to make these specially designed concretes that must meet a combination of performance requirements. Pdf development of high performance concrete with locally. Ultrahigh performance fiber reinforced concrete uhpfc is a new class of materials that combine a very strong and dense cementicious matrix with a high fiber content. Introduction to concrete portland cement association.
Also explore the seminar topics paper on high performance concrete with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. American concrete institute defines high performance concrete as concrete meeting special combination of performance and uniformity requirements that cannot always be achieved routinely using conventional material and normal mixing, placing and curing method. Strutandtie modeling stm for concrete structures, design examples. High performance concrete hpc is a relatively new term for concrete that conforms to a set of standards above those of the most common applications, but not limited to strength. Explore high performance concrete with free download of seminar report and ppt in pdf and doc format. High performance concrete is a term used to describe concrete with special properties not attributed to normal concrete.
This innovative material produces concrete elements that are up to 10 times stronger than conventional concrete. High performance concrete hpc introduction concrete is the most widely used construction material in india with annual consumption exceeding 100 million cubic meters. Compilation and evaluation of results from high performance concrete projects. High performance concrete hpc is that which is designed to give optimized performance characteristics for the given set of materials, usage and exposure conditions, consistent with requirement of cost, service life and durability. In the case of high performance concrete, reinforcement can be minimized andor the dimensions of the structural members can be reduced.
Highperformance concrete hpc is concrete that has been designed to be more durable and, if necessary, stronger than conventional concrete. In fasttrack paving, use of highearlystrength mix tures allows traffic to open within a few hours after con crete is placed. High performance concrete an overview sciencedirect topics. Microstructure, properties, and materials hpc classification. High performance concrete hpc is concrete that has been designed to be more durable and, if necessary, stronger than conventional concrete. There were fewer and narrower cracks in the frc even though the frc had more shrinkage than the control. To establish a clear understanding of high performance concrete hpc, the fhwa is proposing to define hpc by using longterm performance criteria. Table 1a shows some properties and areas of application of hpcs. For the purposes of this specification, high performance concrete hpc is considered as concrete engineered to meet specific needs of a project. Developing performance specification for high performance. A highperformance concrete has been successfully developed for a digitallycontrolled printing process which can build architectural and structural components without formwork.
Uhpfc, reinforcement, structural element, tension, tests. View ultrahigh performance concrete research papers on academia. With high cement content, the use of superpasticizers and silica fume and the need for more stringent quality. It covers new materials for producing higher strength concrete, production methods, mechanical properties. High performance means that the concrete has one or more of the following properties.
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. Guide specification for high performance concrete for bridges ii keywords. Guide specification for highperformance concrete for bridges ii keywords. High performance concrete and its applications in the field. A mix design procedure for high performance concrete mixes has been presented in this paper. Fine concrete, llc is one of a select group of firms in the united states holding a sublicense to design and fabricate with ductal, an ultra high performance concrete. Development of high performance concrete and evaluation of. Aashto, abrasion resistance, admixtures, aggregates, airentrained concrete, air void analyzer, alkalicarbonate reactivity, alkalisilica reactivity, asr, astm, bridge, cement, cementitious materials. High performance concrete hpc is designed to provide several benefits in the construction of concrete structures as tabulated below. The compressive strength of highperformance concrete and. This book provides the state of the art on recent progress in the highperformance concrete applications written by researchers and experts in the field. Applications of high performance lightweight concrete. Applications of high performance concrete in hydropower.
For instance, cement with low c3a is the most desired type of cement to produce high performance concrete because the c3a creates incompatibility of cement with a superplasticizer. It is well known that conventional concrete designed on the basis of compressive strength does not meet many functional requirements such as impermeability, resistance to frost, thermal cracking adequately. Highperformance concrete was prepared by using ceramic waste as coarse aggregate. Chemical and physical properties of cement can help in selecting desired cement to produce highperformance concrete. High performance companies fill 60 percent of topmanagement roles with internal candidates, while low performance companies fill only percent internally, according to a survey of more than 5,000 executives conduct. Unfortunately, many specifications are a combination of performance. Hpc mixtures are composed of essentially the same materials as conventional concrete mixtures, but the proportions are designed, or engineered, to provide the strength and durability needed for the structural and environmental requirements of the. High performance concrete specifications and practices for bridges documents the types of specifications and practices used by state transportation agencies to produce high performance concrete for bridges. The influences of several factors, such as the contents of ceramic coarse aggregates, fly ashes and silica fumes, on the properties of concrete material were investigated. Highperformance concrete hpc is a relatively new term for concrete that conforms to a set of standards above those of the most common applications, but not limited to strength. Since rheological parameters and compressive strength are fundamental properties of concrete in two different stages of production, the correlation between rheological parameters and compressive strength has been used instead of using watercement ratio versus compressive strength relationship. In some instancesssuch as when concrete can obtain high early strength. High performance concrete and its applications in the. While all highstrength concrete is also highperformance, not all.
Introduction to concrete concretess versatility, durability, sustainability, and economy have made it the worldss most widely used construction material. According to the abramss theory strength depends on. Hpc mixtures are composed of essentially the same materials as conventional concrete mixtures, but the proportions are designed, or engineered, to provide the strength and durability needed for the structural and environmental requirements of the project. The term includes a broad range of materials such as defectfree, dense particle, engineered composite, multiscale particle, and fiberreinforced cementitious. Within the last few decades, research has been conducted on what is known as ultra high performance concrete uhpc. The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm h in. To call concrete high performance implies that it is specialized. These mix design options require the use of supplementary cementing materials scms at varying minimum replacement percentages with maximum water to cementitious ratios. High performance concrete hpc has been defined as concrete that which possesses high workability, high strength. Highperformance concrete specifications ideally should be performance oriented.
Table 1 shows the properties and areas of application of high performance concretes. In this paper we propose a model to evaluate the compressive. The strength and the stiffness of coarse aggregate directly influence the behavior of hardened concrete. Ultra high performance concrete pathway to commercialization. However, high strength concrete is defined as concrete that has a compressive strength of 55mpa or higher, as per aci code.
Aci defined highperformance concrete as a concrete meeting special combinations of performance and uniformity requirementsthat cannot always be achieved routinely using conventional constituents and normal mixing, placing, and curing practice. Although in normal concrete, strength is controlled by the paste or by the transition zone between paste and aggregate, the strength of high performance concrete depends not only on the strength but. Concrete is defined as highstrength concrete solely on the basis of. Since rheological parameters and compressive strength are fundamental properties of concrete in two. Various applications of high performance lightweight concrete are discussed. Concrete technology notes pdf ct notes pdf eduhub sw. High performance concrete seminar report, ppt, pdf for. An innovative solution is also proposed for the first time that ensures a satisfactory seismic performance of existing reinforced concrete structures. A mix design procedure for highperformance concrete mixes has been presented in this paper. Mix design of high performance concrete using silica fume and.
In case of any doubt about the proper maintenance procedure, please contact id created, inc. 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. This type of concrete is mainly used for columns, walls, etc. However, a highperformance concrete with both high strength and high workability cannot be produced by just these means because lowering the waterbinder ratio leads to lower workability and. Ground granulated blast furnace slag ggbfs in the blast furnace, magnetic iron ore fe3o4 and haematic iron ore fe2o3 are fed along with limestone into a high temperature chamber containing coke. Although in normal concrete, strength is controlled by the paste or by the transition zone between paste and aggregate, the strength of high. The definition of high performance concrete, applicable to hydropower structures, may differ with that of the definition used for high performance concrete used for infrastructure say bridges wherein high performance concrete is required for early high strength. Residual strength is directly proportional to the fiber content. Guide specification for high performance concrete for bridges.
Special mixing, placing, and curing prac tices may be needed to produce and handle highperform ance concrete. This report details the laboratory developmental work on producing high performance concrete for highway applications. Various authors and researchers proposed different definitions fibre reinforced concrete frc is concrete for high performance concrete hpc. The document provides mandatory language that the specifier can cut and paste into project specifications. High performance concrete is an engineered concrete obtained through a careful selection and proportioning of its constituents. Chemical and physical properties of cement can help in selecting desired cement to produce high performance concrete. High performance concrete, categorization of high performance concrete, materials used in high performance concrete, applications of high performance concrete 1. For example, self compacting concrete is a specific part of high performance concrete, which distinguishes itself with selfconsolidation properties coupled with high flowability. High strength and high performance concrete materials and.
Normal and special materials are used to make these specially designed concrete that must meet a combination of performance requirements. The proposed definition consists of four durability and four strength parameters. High performance concrete, silica fume, superplasticizer and compressive strength. Not all properties can be achieved at the same time. Coke is partially oxidized to carbon monoxide, which reduces the ores to iron. Here you can download the free lecture notes of concrete technology pdf notes ct pdf notes with multiple file links to download. The effects of aggregate type, size, and content on the behavior of normal and highstrength concrete, and the relationships between compressive strength, flexural strength, and fracture energy are discussed. Highperformance concrete hpc exceeds the properties and constructability of normal concrete. Experimental investigation on high performance concrete. 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. The term concrete refers to a mixture of aggregates, usually sand.
Preparation and properties of highperformance concrete. Hpc is a construction material which is being used in increasing volumes in recent years due to its long term performance and better rheological, mechanical and durability properties than cc. The compressive strength of silica fume concretes was investigated at low watercementitious materials ratios with a naphthalene sulphonate superplasticizer. Highperformance companies fill 60 percent of topmanagement roles with internal candidates, while lowperformance companies fill only percent internally, according to a survey of more than 5,000 executives conduct. The concrete technology notes pdf ct notes pdf book starts with the topics covering portland cement, mineral and chemical admixtures, classification of aggregate, factors affecting workability, water cement ratio, compression tests, factors in the choice of mix. The results show that the compressive strength of semiporcelain coarse aggregate concrete are slightly lower than that of natural concrete. Ultrahigh performance concrete research papers academia. Pdf development of high performance concrete international. In 1998, the technical activities committee and its subcommittee on highperformance concrete derived and approved an official aci definition. A high performance concrete has been successfully developed for a digitallycontrolled printing process which can build architectural and structural components without formwork. Mar 06, 2014 high performance concrete hpc is a specialized series of concrete designed to provide several benefits in the construction of concrete structures that cannot always be achieved routinely using conventional ingredients, normal mixing and curing practices. Hardened properties of highperformance printing concrete.
Superplasticizer is added to keep the mix workable. Concrete is the most widely used material in building construction. Trbs national cooperative highway research program nchrp synthesis 441. The concrete in the mouldcast state had high strengths 107 and 11 mpa compressive and flexural strength respectively, low drying shrinkage and a density of 2250 kgm 3. High performance concrete hpc is a specialized series of concrete designed to provide several benefits in the construction of concrete structures that cannot always be achieved routinely using conventional ingredients, normal mixing and curing practices. High performance lightweight concrete is produced by carefully mixing specified amount of cement, sand, lightweight aggregate, different pozzolans such as fly ash, silica fume, shale, metakaolin, calcined clay and superplasticizer. Highperformance concrete has been primarily used in the construction of tunnels, bridges, pavements, high rise building structures because of its strength, durability, and high modulus of elasticity. High performance concrete the development of high performance concrete hpc is a giant step in making concrete a hightech material with enhanced characteristics and durability. Recent studies performed on a highperformance fiberreinforced concrete in a bridge deck found that adding fibers provided residual strength and controlled cracking. High performance concrete specifications and practices for.
Aci american concrete institute has defined hpc as a concrete in which certain characteristics are developed for a particular application and environment. Table 172 lists properties that can be selected for highperformance concrete. Aashto, abrasion resistance, admixtures, aggregates, airentrained concrete, air void analyzer, alkalicarbonate reactivity, alkalisilica reactivity, asr, astm, bridge, cement, cementitious materials, chemical admixtures, chloride ion pene. Introduction it is important to note the highstrength and highperformance concrete are not synonymous. This book summarizes recent developments in the field of high performance concrete, and helps engineers appreciate the potential of high performance concrete in construction. Txdot currently defines high performance concrete hpc as mix design options 14. High performance concrete strength of materials concrete. Developments and applications of highperformance concrete.
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