Concrete basicsaddresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. Thus for ductal concrete, about ten cnrs laboratories worked with lafarge on reactive powder concrete. Ductal has high compressive strength and flexural resistance compared to other concretes. Intended use of the product concrete products are used in a wide variety of applications in. Reliable, energyefficient and environmentallyconscious, the versatility of concrete is evident in the fact that it can be formed into almost any shape when newly mixed yet durable once set times are reached. Most of the structural shell to be used for connecting the louvered ductal panels is a partially grouted cmu concrete masonry unit wall system. Concrete is used in many applications such as highways, wall panels. Concretes concretes for the 21st centuryfor the 21st century press book june 2007. For ordinary concrete, the creep coefficient can reach 34.
Material characteristics of normal strength concrete nsc and high performance concrete hpc. Concrete surfaces to be in contact with ductal should be sound, have a roughened or exposed aggregate finish with 0. Concretes concretes for the 21st centuryfor the 21st century. Comparison between tables 2a and 2b shows that uhpdc generally has superior mechanical and durability properties over nsc and hpc in all disciplines voo and foster, 2010. It looks as though it is rising out of the road or growing out of and fusing with the landscape. Special concretes pdf in the general use of the word concrete, the idea implied is the conventional. Improved understanding of the phenome non enabled the advent of prestressed concrete. Concrete basicsaims to provide a clear, concise explanation of all aspects of making quality concrete. Our solutions and products cement, concrete, aggregates. Ductals tm characteristics result in a concrete product that is much less permeable than standard concrete, more abrasion resistant, and longer lasting by an order of 34 times than that of traditional concrete. First use of ultrahigh performance concrete for an.
Name, address, and telephone of the responsible party company lafarge north america inc. Uhpc product they called ductal and it is still in use ultrahigh performance concrete a type of concrete you havent heard about, but should by joe nasvik workers are placing ultrahigh performance concrete uhpc on a bridge deck for the iowa department of transportation. The limitations that have defined our concept of concrete for the past century are now breaking down as designers, contractors and precasters begin to explore the potential of ultrahigh performance, fiber reinforced concrete uhpfrc manufactured by lafarge under the trade name ductal. Durability 0 2 mm carbonation depth of penetration 0. At present, the novel uses of concrete in prestressed concrete. Concrete can either be made directly on a construction site, or delivered as readymix concrete in a concrete truck, as is most often the case in developed countries. Each of the largescale 18 ft long x 11 ft wide ductal panels now in production by gate precast will contain a series of ribs, and cover a total surface area of 8,650 sq ft.
Shawnessy light rail transit station, calgary, canada. Vertical shaft kilns were replaced with rotary kilns and ball mills were used for grinding cement. On 15 july the new company was officially launched around the globe under the name of lafargeholcim, creating a new leader in the building materials sector. Ductal premix is an ultrahigh performance material used to produce a specialized concrete used in construction. Engineered cementitious composite ecc, originally developed at the university of michigan, has a typical moderate tensile strength of 4.
An ultrahigh strength concrete looking for problems. Ductal, a new ultra high performance concrete fineconcrete. Lintels, concrete block, pavers, precast pipe, precast concrete, lafarge pipe, storm pipe, sanitary pipe, insulcore building wall panels, precast panels, ductal panels 1. Significantly stronger than conventional concrete, it offers better resistance to abrasion, chemicals, freezethaw. When water is added to this mixture, it sets, meaning that the mixture hardens. All dirt, oil, grease, and other bondinhibiting materials should. A stateoftheart report for the bridge community publication no. On 15 july the new company was officially launched around the globe under the name of lafargeholcim, creating a new leader in the building. Ductal ultrahigh performance, fiber reinforced concrete uhpfrc is a revolutionary material that offers superior strength, durability, ductility and aesthetic design flexibility. There are, however, m any variations of this procedure and a few are listed below. Metallic fibers steel or organic fibers polyvinyl alcohol and admixtures superplasticizer are added to ductal premix by the enduser. Reactive powder concrete is a relatively new material and research into the properties and. How will aci 239 contribute to the development of uhpc in the us.
Find materials for this course in the pages linked along the left. Capital initiatives in this company are cofunded by the european regional development fund and enterprise ireland under the border, midland and western regional operational programme 20142020. Rearrange individual pages or entire files in the desired order. Ductal presents a genuine revolution in the concrete sector. Envel, ultra high performance concrete shape architectural. Freely browse and use ocw materials at your own pace. Concrete is the most widely used construction material in the world with more than six billion tons produced each year. The term concrete refers to a mixture of aggregates, usually sand. Conceived for an external use, the tops are in ductal concrete, a component of the highest quality and technology, made up of very fine natural mineral. Ductals proprietary blend configuration allows for detailed, unique casts, that are longlasting.
Ductal is a proprietary premixed ultrahigh performance concrete whose physical characteristics exceed those of common concrete used in the construction of buildings. Where possible, a limit states approach consistent with the design requirements of the australian standard for concrete structures as3600 1994 has been adopted. Inspect all materials used in the construction of concrete. On 10 july 2015 lafarge merged with holcim, a swiss cement company. Rainscreen cladding panels face fastened ductal free. However, if you wish to skip to the next speaker, use the scroll bar at left to locate the speakers first slide indicated. In recent years, two new classes of hpfrcc have emerged.
Readymix concrete is a fresh product, which can be delivered and poured during a period of two hours after being manufactured, before starting to harden or set. Uhpc is being considered for use in a wide variety of highway infrastructure applications. The glenmore traillegsby pedestrian bridge, alberta 2007 is a single span, 53 m bridge that crosses 8 lanes of traffic, consisting of 2 cantilevered, high performance concrete abutments and a 33. Uhpc ultra high performance concrete this remarkably strong concrete can be used in combination with steel, stainless steel or organic fibers to clad or enhance a buildings aesthetics in a number of finishes, textures and configurations. This technological breakthrough offers new competitive solutions for engineers and construction contractors. We listen to your specific needs and requirements to supply and, if needed, develop together the best solution. Its light gray finish makes joi open air perfect for a contemporary and urban stage. Lafarge l concrete reborn 4 concrete, a material requiring cuttingedge scientific expertise manufacturing concrete concrete is a mineral material, composed of a mixture of aggregates, sand and water, agglomerated by a binding agent generally cement, which is composed essentially of limestone and clay and, in. He is also a fellow of astm, and the engineering institute of canada. Lecture notes mechanics and design of concrete structures. The ultrahigh performance fiberreinforced concrete uhpc product line ductal has expanded with a new formula that is applied by spraying on vertical walls, vaults and complex structures. Physical salt attack on concrete, part 2 aci spring 2012 convention march 18 21, dallas, tx r. Concrete facade renewal in warsaw sparkling concrete. Fhwahrt60 june 20 research, development, and technology turnerfairbank highway research center 6300 georgetown pike mclean, va 221012296 coverhrt.
Theory of creep and shrinkage in concrete structures. Ductal at a glance fiber reinforced ultrahigh performance concrete uhpc offers durable, thin panels low porosity for extreme durability ductile behavior due to addition of organic or glass fibers can be used in ventilated or rainscreen facade. It is significantly stronger than conventional concrete, with compressive strengths up to 30,000 psi and flexural strengths up to 6,000 psi. Introduction to concrete concretess versatility, durability, sustainability, and economy have made it the worldss most widely used construction material. Concrete technology today is now available on the internet at continued on page 2 figure 1 above. May 01, 2006 ductal is made by lafarge, a leading global producer of construction materials, and is available through lafarge north america. The proportions between the sorts aggregates and their quantities are establishing in table 5, so the grading curve of the final aggregate could be into the grading zone which was prescript.
First use of ultrahigh performance concrete for an innovative train station canopy by v. Concrete is a mixture of cement, aggregates and sand. Ductal uhpc rainscreen cladding panels concealed rail mounting. Ductal has approximately twice the strength of ecc, while ecc has approximately 20 times the tensile ductility of ductal. Ductal is a hightech construction material ultrahigh performance concrete uhpc with the superior qualities of resistance to compression, ductility, longevity, ecoefficiency, insulation and aesthetics. Composed of an optimized gradation of fine granular particles and a waterto. Ultrahigh performance concrete has a discontinuous pore structure that reduces liquid ingress, significantly enhancing durability compared to conventional and highperformance concretes. Cladia, innovative panels for external and internal facades.
Its selfconsolidating nature allows the mix to achieve never before seen. Use of ductal in the building is primarily a design statement. Ductal uhpc ultrahigh performance concrete cladding panel solution is designed to meet the specific requirements needed for a variety of buildings. Inspect all materials used in the construction of concrete work at their source, on the job, or both. Fhwahrt60 june 20 research, development, and technology turnerfairbank highway research center 6300 georgetown pike mclean, va 221012296 dd 1 67 11. It is significantly stronger than conventional concrete, with compressive strengths up. Anderson award winner, and a member of numerous aci committees including c232 on fly ash and c201 on durability. Aci concrete sustainability forum part 3 of 3 aci fall 2009 convention nov. Ductal js1212 is an early highstrength ultrahigh performance concrete uhpc that offers superior strength, durability, ductility and bond capacity, compared to conventional and high performance concretes and grouts. Ductal is made by lafarge, a leading global producer of construction materials, and is available through lafarge north america.
Concrete, ultrahigh performance concrete that has a minimum specified compressive strength of 150 mpa 22,000 psi with specified durability, tensile ductility and toughness requirements. It can withstand pressures up to 595,000 pounds more than the weight of seven semi trucks. Ductal is highly moldable and replicates form materials with amazing precision. Intended use of the product concrete products are used in a wide variety of applications in buildings and civil engineering projects. Developed by lafarge, ductal ultrahigh performance concrete uhpc possesses a unique combination of superior properties including strength, ductility, durability and enhanced aesthetics. As the global leader in building materials and the largest cement producer in the united states, we provide the widest range of cement, concrete and aggregates products.
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