How much does UHPC cost?
How much does UHPC cost?
Use of UHPC Pre-bagged UHPC has been selling for over $2000 per cubic yard. Also, fibers cost between $250 and $500 per cubic yard depending on dosage and source of fibers. It is therefore sometimes difficult to justify using materials that cost nearly $3000 per cubic yard.
What is UHPC material?
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; fibers are generally included in the mixture to achieve specified requirements …
How do I get UHPC?
UHPC is reinforced by steel fibers, which enhance the material’s tensile strength and energy dissipation capacity….The mixing process is as follows:
- The silica sand and silica fume are first dry-mixed for about five minutes.
- Water and HRWR are first mixed together and then added gradually to the dry material.
Why is UHPC limited in practice?
UHPC has many advantages over conventional concrete but is still in limited practice due to limited design codes and high cost As far as the constituents are concerned, steel fibers, finer silica sand and silica sand amounted for nearly half of the total cost.
When was UHPC made?
1994
UHPC was officially coined in 1994, and soon after was used in applications in North America. The U.S. Army Corps of Engineers first used UHPC in the 1980s, though UHPC did not become commercially available in the U.S. until 2000. However, in 1997 it was first used on a bridge in Quebec, Canada.
Which is more stronger white cement or GREY cement?
White cement is no more or less strong than grey cement.
What is the difference between high strength and high-performance concrete?
High-strength concrete is defined by its compressive strength at a given age, whereas high-performance concrete is defined by its performance criteria namely: high durability, high strength, and high workability. High-performance concrete (HPC) is one that has been designed to be far more durable than regular options.
What is silica fume concrete?
9 – Use of silica fume in concrete Condensed silica fume is a very fine, amorphous, and reactive mineral admixture. It reacts readily with the calcium hydroxide, which is produced during Portland cement hydration. Silica addition refines pore structure and produces concrete of improved mechanical strength.
What is UHPC concrete?
– Thinner sections; longer spans; lighter weight UHPC is one of the latest advances in concrete technology and it addresses the shortcomings of many concretes today: It provides high strength to weight ratio, high tensile strength, high ductility, and volume stability.
What is the best material for UHPC?
Fiber types often used in UHPC include high carbon steel, PVA, Glass, Carbon or a combination of these types or others. The ductile behavior of this material is a first for concrete, with the capacity to deform and support flexural and tensile loads, even after initial cracking.
When did UHPC become commercially available?
Since 2000, when UHPC became commercially available in the United States, a series of research projects has demonstrated the capabilities of the material. A handful of State departments of transportation have deployed UHPC components within their infrastructure, and many more are actively considering the use of UHPC.
Are there any Just-Add-Water UHPC products available?
Some manufacturers have created just-add-water UHPC pre-mixed products that are making UHPC products more accessible.
