All UHPC Products Are Not the Same

More than 30 years of research and recent commercial success have proven the promise of Ultra-High Performance Concrete (UHPC). Its strength and durability have brought UHPC into the spotlight for public agencies and private firms seeking superior alternatives for concrete construction. Now the question is often not “will it work?” but “how is it made?”

Reluctance to adopt UHPC is often driven by an aversion to unnecessary changes to existing supply chains, distribution methods, and installation techniques. Ready-mix suppliers and batch plants seek seamless integration of UHPC, but many are under the impression that is not possible. UHPC skeptics see a new technology that has promise, but that also upends established norms of a successful industry— and these skeptics would be right, at least for most UHPC products.

All UHPC products are not created equal. Fibrous reinforcement is the common feature, but strength, curing, and handling are just a few areas that will vary depending on the manufacturer. UHPC manufacturers may have unique requirements for sourcing and mixing. Special oversight and equipment might be required. Pre-mixed bags are the most common packaging, often without the option to use locally sourced materials.

In fact, many purveyors of UHPC will have you believe that it is a complex, high-tech, heavily proprietary concoction of special sands and cements with unique admixtures that justifies its very high price. This is just a fairy tale.

Cor-Tuf has proven that UHPC can be mixed, distributed, and installed in line with traditional concrete techniques. Particular sands and specialized cements are required by most producers, but not by Cor-Tuf.

Local cements, sands, equipment and labor are crucial factors for competitive and reliable concrete production. Imported materials and high-handed restrictions are understandably deterring some stakeholders from other UHPC products. Less flexibility for distributors and contractors equates to missed deadlines and blown budgets. Compatibility with local production is a requirement promised and honored by Cor-Tuf.

Many UHPC products will claim compatibility with ready-mix trucks. What they don’t tell you is that they rented someone’s truck and took 30 minutes opening imported pre-mixed bags. This isn’t practical, and it’s not going to cut it in the real world of concrete construction. With Cor-Tuf UHPC, pull up your existing truck to the same batch plant used for the past three decades, and have it fully loaded and mixing within two to four minutes.

Cor-Tuf makes the message clear when it comes to UHPC. Our product stands out from the crowd due to versatility and quality. You get all the benefits of UHPC, including higher strength, weather resistance, and longer service life, using the same concrete procedures used for generations. Avoid the imitation products because all UHPC products are not created equal. Your sand, your cement, our Cor-Tuf UHPC.

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PRODUCT DATA SHEET

CTL Group Material Testing Results*


Concrete Performance
Test MethodCuring Conditions at CTL Group AgeTest Results
Compressive StrengthASTM C 3973°F/100% RHat 1 day9,050 psi
Compressive StrengthASTM C 3973°F/100% RHat 3 days11,140 psi
Compressive StrengthASTM C 3973°F/100% RHat 14 days16,000 psi
Compressive StrengthASTM C 3973°F/100% RHat 28 days21,000 psi
Compressive StrengthASTM C 3973°F/100% RHat 56 days23,000 psi
Compressive StrengthASTM C 1856Controlled Curingat 28 days25,500 psi
Length Change of HHCASTM C 15773°F/50% RH28 days
(26 days Dry)
-0.033%
Chloride PenetrabilityASTM C 1202
AASHTO T277
73°F Limewater
190°F water 5 days;
190°F air 2 days;
73°F water until testing
28 days
28 days
≤100 (Negligible)
≤100 (Negligible)
** Flexural StrengthASTM C 160973°F Limewater28 daysL/600 = 2800 psi or better
** Flexural StrengthASTM C 160973°F Limewater28 daysL/150 = 1500 psi or better
Direct Tensile StrengthAASHTO T39773°F Limewater28 days1000 psi or better
Modulus of ElasticityASTM C 46973°F Limewater28 days6800 ksi
Abrasion Resistance, Ave LossASTM C94473°F Limewater58 days0.016 oz
Freeze Thaw Resistance RDMASTM A 66673°F Limewater28 days600 cycles, 96%

Notes:
*Testing results confirmed by independent laboratory CTL
Group. Results are based on laboratory mixes.
**Data per UCF Material Study 5/10/2022
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Client: Cor-Tuf UHPC CTL Project No: 059330
Date: 1/20/2020

What Makes UHPC Ultra-High Performance

UHPC achieves its superior performance through a dense nano-scale matrix that is far less permeable than conventional concrete. This matrix is combined with steel fiber reinforcement, which provides exceptional ductility and crack resistance.

Though exact formulations and results vary by producer, UHPC generally incorporates a blend of Portland cement, sand, supplementary cementitious materials, chemical admixtures, and fibers – resulting in a material dramatically stronger, tougher, and longer lasting than traditional concrete.

Cor-Tuf Outperforms Conventional Concrete and Other UHPCs

Feature Cor-Tuf UHPC Conventional Concrete Other UHPCs
Compressive Strength 25,000+ psi 4,000–6,000 psi 18,000–22,000 psi
Ease of Placement ✅ Standard Equipment ✅ Standard Equipment ❌ Specialized Tools
Bonding & Ductility Extreme Low Moderate
Freeze-Thaw Resistance 1000+ Cycles 20–80 Cycles 300 Cycles
Chloride Permeability Near Zero High Low
Lifespan 100+ Years 25–30 Years 50–60 Years

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