58 MAY 2019 | Ci | www.concreteinternational.com
Larry Rowland, FACI, is Manager of
Marketing and Technical Services,
Lehigh White Cement Company,
Allentown, PA. He is Chair of ACI
Committee 524, Plastering, and a
member of numerous ACI Committees.
He serves on the Organizing Committee
for the Second International Interactive
Symposium on Ultra-High Performance
Concrete, to be held in Albany, NY, June 2-5, 2019. Rowland
is a Certified Construction Product Representative with the
Construction Specifications Institute, a recognized expert on the
topics of architectural and decorative concrete, and a committed
promoter of innovative concrete building design. He received
the 2016 ACI Concrete Sustainability Award.
Michele Di Marino is Chief Sales,
Marketing & Commercial Development
Officer at Cementir Holding SpA, Rome,
Italy. He has 20 years of international
management experience, half spent
in cement and building materials. Di
Marino is leading the global commercial
strategy for the whole range of products
in Cementir’s scope, and he is driving
the Cementir innovation platform and its
strategic opportunities, including the conception, development,
and commercialization of AALBORG EXTREME Light 120.
ACI member Jesper Sand Damtoft is
Director of Research and Development,
Quality, and Technical Sales Support
of Cementir Holding. He is in charge
of Cementir’s Research and Quality
Center in Aalborg, Denmark. Damtoft
has more than 30 years of experience
in the development of new cement and
intensive high-performance binder systems can be traced back
to this previous work.
Like its UHPC predecessors, AALBORG EXTREME
Light 120 has the potential to fundamentally change the
way many researchers and designers see concrete.3 Because
the clay-based binder additives can be manufactured in a
very light color, the new UHPC mixture has been produced
with white portland cement, yielding a white mixture
suitable for use in architectural applications. The material’s
high flow rate further encourages its application in
The binder technology and predosed admixture loading is
formulated to deliver at least 45 minutes of open working
time. Once consolidated, it has a relatively short setting time.
It also develops strength rapidly and is able to achieve
compressive strengths of 85 MPa (12,000 psi) in just 24 hours
at standard production temperatures of about 23°C (73°F).
Applications for this material are expected to include
structural-architectural building components suited for UHPC,
such as thin geometrically complex building elements.
Examples of these types of applications include the single-
and double-curvature concrete panels produced by the
innovative Dutch concrete producer mbX. Using their own
white UHPC mixture, mbX produced the architectural
concrete screens for the London, England, Crossrail
Farringdon Station as designed by Grimshaw Architects. mbX
is now using AALBORG EXTREME Light 120 as their
high-performance concrete mixture of choice.
The search for more sustainable concrete binder systems
drove the innovation behind the new product. It makes use of
cutting-edge combinations of white portland cement, ground
carbonates, and dehydroxylated clays, along with other
specialized materials. This new material has now arrived in
North America and is expected to provide a more sustainable
way to achieve the design aspirations of an architectural
community poised to tap into the promise of UHPC.
—Lehigh White Cement Company,
1. Ferreiro, S.; Herfort, D.; and Damtoft, J.S., “Effect of Raw Clay
Type, Fineness, Water-to-Cement Ratio and Fly Ash Addition on
Workability and Strength Performance of Calcined Clay—Limestone
Portland Cements,” Cement and Concrete Research, V. 101, Nov. 2017,
2. Kunther, W.; Dia, Z.; and Skibsted, J., “Thermodynamic Modeling
of Hydrated White Portland Cement–Metakaolin–Limestone Blends
Utilizing Hydration Kinetics from 29Si MAS NMR Spectroscopy,”
Cement and Concrete Research, V. 86, Aug. 2016, pp. 29-41.
3. Antoni, M.; Baquerizo, L.; and Matschei, T., “Investigation of
Ternary Mixes Made of Clinker Limestone and Slag or Metakaolin:
Importance of Reactive Alumina and Silica Content,” Calcined Clays for
Sustainable Concrete, K. Scrivener and A. Favier, eds., Springer, 2015,
Selected for reader interest by the editors.