Pdf synopsis ultrahigh performance concrete uhpc has evolved in the last couple of decades and it is relatively new type of concrete. Theoretically, we are able to use it for daily applications, wherever. The term ultrahigh performance concrete uhpc refers to a relatively new. Characteristics of concrete linked to ballistic resistance. Ultrahigh performance concrete uhpc is a relatively new building material, which has been fabricated since 1990s. Uhpc, ballistic resistance, concrete, compressive strength. While normal concrete has a strength rating in the range of 3,000 to 4,000 psi pounds per square inch, ultra high performance concrete has a strength rating many times that. First use of ultrahigh performance concrete for an innovative train station canopy by v. Fresh behaviour of ultrahigh performance concrete uhpc.
Uhpchss ribbed deck system uhpcfrp waffle deck system hybrid fulldepth uhpcfrp deck system can be implemented using accelerated bridge construction abc techniques to help meet the growing demand for rapid bridge rehabilitation and reconstruction across the united. Ultrahigh performance concrete advances in the science of concrete materials have led to the development of a new class of cementitious composites, namely ultrahigh performance concrete uhpc. Various tests have confirmed uhpcs performance in the laboratories. Mechanical properties of ultrahigh performance concrete. Ultrahighperformance concrete american concrete institute. 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. Ultrahigh performance concrete uhpc is defined as a cementitious based composite material with compressive strengths above 150 mpa, preand postcracking tensile strengths above 5 mpa, and enhanced durability.
Fifteen reinforced concrete beams are cast with honeycombs on the tension side, repaired and then tested under four pointloading. Ultra high performance concrete is a modern creation that is changing the way we look at construction. Ultrahigh performance concrete uhpc is an advanced construction material that affords new opportunities for. Both were initially intended to improve performances and to simplify the construction system no vibration, less or no passive reinforcement, but the price to pay is a much sharper mix design and a loss of robustness. Ontario concrete awards structural design innovation award ontario concrete awards material development and innovation award hodder avenue underpass a modular construction approach and a unique uhpc pier cap design 9th international confer ence on short and medium span bridges. Ultra high performance concrete pathway to commercialization. Fiber reinforcement architectural uhpc precast products are fiber reinforced with fibers having a minimum tensile strength of 140 ksi and a diameter of up to 300 microns. Sources of the steel fibers are available in the u. The dry materials in uhpc are cement, silica fume, ground quartz and silica sand. 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 bridges, structural beams and seawall anchor plates. Ultrahigh performance concrete uhpc is an advanced construction material that affords new opportunities for the future of the highway infrastructure.
The basic raw materials of uhpc are familiar to everyone who knows concrete. Pdf files can be viewed with the acrobat reader foreword ultrahigh performance concrete uhpc is an advanced construction material that affords new opportunities for the future of the highway infrastructure. Workshop agenda illinois dot auditorium, springfield, il august 22, 2018 topic duration minutes start end 1. Engineering application of ultrahigh performance concrete in bridges uhpc is an advanced class of cementitious composite material composed of an optimized gradation of granular constituents, with a waterto cementitious materials ratio less than 0. Easy options buy bare or with the aluminum nosing and recyclable patented construction cover for a nohassle, codecompliant stair.
The next generation of concrete, ultrahigh performance concrete uhpc, exhibits exceptional strength and durability characteristics that make i. Caast ultrahigh performance concrete by spring valley. Environmental protection agency program helping organizations andindividuals fight climate change through superior energy efficiency. The study was carried out on an 8story reference building, with all three solutions designed to achieve the same thermal performance. The repair materials used include ultra high performance concrete uhpc, ultra high performance fiber reinforced concrete uhpfrc, normal. Mix design and performance evaluation of ultrahigh. Shawnessy light rail transit station, calgary, canada. Performance of ultrahigh performance concrete self. Innovative use of ultrahigh performance concrete for. The remainder of this paper is organized as follows. This photo shows the casting of fluid ultrahigh performance concrete uhpc from a wheelbarrow into the void space between the top flanges of two deckbulbtee prestressed concrete girders. It permits the construction of both more slender and more durable concrete structures with a prolonged service life and thus improved sustainability. Uhpc has many advantages over conventional concrete but is still in limited practice due to limited design codes and high cost.
Similar to selfconsolidating concrete scc, uhpc flowability. Three dimensional fracture material model for ultrahigh. Concrete technology today is now available on the internet at continued on page 2 figure 1 above. First use of ultrahigh performance concrete for an.
Uhpc blended with fibers has excellent crack resistance and can suppress crack growth to reduce maintenance costs 8,9. Our research teams have completed an environmental lifecycle analysis on three different rainscreen cladding panel solutions. With a strength 10 times higher than traditional concretes, it can resist bending and can withstand major transformations such as pressure or dilation without breaking. The term includes a broad range of materials such as defectfree, dense particle, engineered composite, multiscale particle, and fiberreinforced cementitious.
The effects of such phase transformations of constituents in uhpc on the overall mechanical response of thematerial have not been quanti. It sounds simple enough, but uhpc is an order of magnitude different from traditional categories of concrete. Uhpc is a class of concrete defined by its exceptionally high flexural and compressive strength. Selfconsolidating characteristics desired for smr modular construction facilitate rapid construction of steel plateconcrete sc beams and walls thinner and lighter modules withstands the harsh environments and mechanical loads. Box 5, 5600 mb eindhoven, the netherlands bheidelbergcement benelux, the netherlands article info article history. Ultrahigh performance concrete connections for prefabricated bridge elements. Uhpc has several advantages over conventional concrete but the use of it is limited due to the high cost and limited design codes.
C 5 and c 6 are material parameters controlling the exponential shape of normal crack stressstrain diagram. Within the last few decades, research has been conducted on what is known as ultra high performance concrete uhpc. The mechanical and durability properties of uhpc make it an ideal candidate for use in developing new solutions to pressing concerns about highway. Civil engineer epfl rehabilitation of concrete structures using ultrahigh per. Concrete uhpc, lower watertopowder ratios and high contents of. Pier specimens were constructed with the same configuration, except that the segment of the column right above the precast foundation had varying material and. The low watertobinder ratio wb, high binder content, the use of steel fibers, and the absence of coarse aggregate make uhpc significantly different from conventional concrete in both the. These materials conform to the mill certificate specifications. Applications include bridge beams and decks, solid and perforated wall panelsfacades, urban furniture, louvers, stairs, largeformat floor tiles, pipes and marine. Impact energy absorbed by the sample of uhpc is 3 times higher than traditional hac selfcompactant concrete. I ntroduction ultra high performance concrete uhpc is a mortar or concrete material that has.
How to make ultra high performance concrete hunker. Design and performance verification of uhpc piles for deep. Nine uhpcconcrete composite slabs tested by yin et al. Concrete, ultrahigh performance concrete that has a minimum specified compressive strength of 150 mpa.
Aci documents are requested to contact aci via the errata website at. 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. Ultrahigh performance concrete in geotechnical and. Uhpc 10,500 psi light weight precast concrete treads. Comparison of compressive strength standard concrete uhpc ultra high. The rebar can be seen extending from the girders into the void. Using innovative and new materials for foundation applications makes the aashto objective of 75 years service life achievable. Structures, aci manual of concrete practice part 1.
To achieve desired properties, uhpc is typically produced with low watercementitious materials wcm ratio i. Pdf mechanical properties of ultra high performance concrete. Munaf alramahee and kevin mackie, department of civil. Ultra light weight a honey comb core is coated with special uhpc mix to reduce weight up to 70% per square foot. Development of an ecofriendly ultrahigh performance concrete uhpc with ef.
Special uhpc mix 10,500 psi provides the toughest concrete tread in the industry. Going to a uhpc with strength higher than 200 mpa certainly is another big step forward. Selected chapters from the german concrete yearbook are now being published in the new english betonkalender series for the benefit of an international, isbn 9783433030875 buy the ultrahigh performance concrete uhpc. Concrete uhpc a new type of uhpc which features a compressive strength higher than 150 mpa. A brief description of the current design models for non. Minimum cement content 3545 mpa 45 mpa 8% 1,5 kg m2 21,5 mm 200 cm 750 mm ep 4,5j nm 350400 kg m3 a. Ultrahigh performance concrete uhpc connections for.
Ultrahigh performance concrete uhpc is a new class of concrete that has superior flowability, as well as mechanical and durability properties. The facilities must include a projector, projector screen, and flip. For the purposes of this document, uhpc is limited to concrete that has a minimum specified compressive strength of 22,000. Development of an ecofriendly ultrahigh performance.
Rehabilitation of concrete structures using ultrahigh per. Compared to conventional concrete, it has superior mechanical strength, durability and impact resistance. The purpose of the workshops is to facilitate the implementation. Ultrahighperformance concrete uhpc is a class of advanced cementitious materials with greater strength, tensile ductility, and durability properties when compared to conventional or even highperformance concrete. Ultra high performance concrete uhpc with a high compressive strength of. Publishers pdf, also known as version of record includes final page. 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. Ultrahigh performance concrete fhwa us department of.