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Because of the Labor
Day holiday, the next issue of the Executive Report
is scheduled for Monday, September 10, 2007.
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Paper
Mill Draws on RCC Pavement
For expansion and process improvements at a Maine paper mill,
roller-compacted concrete (RCC) offered the classic trinity
of benefits for industrial pavement: low cost, high strength,
and rapid construction.
New equipment at the mill required a hard paved surface for
a clean operating environment, improved efficiency, and reduced
maintenance. With winter approaching, construction time also
became a factor.
RCC met all the project requirements. To meet the need for heavy
equipment and truck loading, engineers specified a 9-inch-thick
slab. The RCC mix design—including 7% silica fume—reached
7-day strengths of 6,800 psi.
Although it was the first RCC paving job for Lane Construction,
the contractor completed the 2,100-cubic-yard project in just
two days. And because of RCC's lower cost, the project was expanded.
Lane paved 100,000 square feet instead of the 75,000 square
feet in the original plan and budget.
A complete case history of the project is on PCA's Web site
and is the subject of a new publication. (See
below.)
More at www.cement.org/pavements
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Fellowship Recipients
Present Results
Five past recipients of grants for PCA's
Education Foundation will present the results of their research
in a fellowship session at PCA's Fall Committee Meetings.
The five presentations on sponsored projects are scheduled
for Monday, September 10, at 10:00 am:
- "Assessment of Confinement Models
for Reinforced Concrete Columns Subjected to Seismic Loading,"
University of British Columbia, Kevin Riederer (student)
and Kenneth J. Elwood (professor)
- "Extending the Use of the Pressure
Meter to Evaluate the Air Void System in Fresh Concrete,"
The University of Texas at Austin, Tyler Ley (student) and
Kevin J. Folliard (professor)
- "Pervious Concrete for Solid/Liquid
Separation and Waste Remediation," University of Kentucky,
Joe David Luck (student) and Stephen R. Workman (professor)
- "Use of Cement Kiln Dust for Reconstruction
of Bituminous Roads," University of Wisconsin-Madison,
Jeremy Baugh (student) and Tuncer B. Edil (professor)
- "Innovative Reuse of Cement Manufacturing
Byproducts: Hydrologic Modeling of Artificial Soil as an
Evapotranspirative Cover System," University of Missouri-Columbia,
Alexandra Wayllace (student) and William J. Likos (professor)
Following the presentations, an Education
Foundation Fellowship Awards Luncheon will recognize the seven
fellowships awarded in 2007.
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Board Adopts Town
Meeting Forum for Fall
PCA's Fall
Meeting will be held on October 21-23, 2007, at Pinehurst Resort,
Pinehurst, North Carolina. On Monday
morning, the Board will conduct two town meeting styled discussions,
one on market development issues and the other on research
and technical issues. These open forums are an opportunity
for input on key issues. Directors are invited to bring their
senior executives to sit in on the session and participate
in the discussion.
In addition to the PCA Board of Directors,
the board of the Cement Association of Canada will also meet.
The agenda also includes meetings of PCA's Government Affairs
Counsel and Legal Counsels Committee.
Contact
Jan Farnsworth
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Nominate Your Top
Recycling/Reclaiming Project
Roads & Bridges magazine is
now taking nominations for its Recycling/Reclaiming Awards.
Projects will be awarded in the following categories: hot in-place
recycling, cold in-place recycling, cold planing, and full-depth
reclamation. To qualify, projects must have been in the design
or construction phase over the past 18 months.
Nomination deadline is October 1.
PCA is preparing several projects for nomination. If you have
a project to nominate, please contact Greg
Halsted or Patti Flesher.
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Global Survey Shows 'Green' Construction
Costs Are Dramatically Lower Than Believed
The real estate and construction markets
misjudge the costs and benefits of "green" buildings,
creating a major barrier to more energy efficiency in the building
sector, a new study by the World Business Council for Sustainable
Development (WBCSD) reports.
Respondents to a 1,400 person global survey estimated the additional
cost of building green at 17 percent above conventional construction,
more than triple the true cost difference of about 5 percent.
At the same time, survey respondents put greenhouse gas emissions
by buildings at 19 percent of world total while the actual number
is 40 percent, more than double.
The findings are disclosed in a new report titled "Energy
Efficiency in Buildings: Business Realities and Opportunities."
The project is co-chaired by Lafarge and United Technologies
Corporation. Other participating companies are CEMEX, DuPont,
Electricite de France, Gaz de France, Kansai, Philips, Sonae
Sierra, and Tepco.
The report is available at www.wbcsd.org
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Beneficial
Reuse of Materials in the Cement Manufacturing Process: The
reuse of alternative materials in the manufacturing process
provides a proven method for the recovery of energy and material
values from materials that would otherwise be considered wastes
The industry’s goal for the future is to continue to emphasize
the beneficial reuse of materials, meeting EPA’s objectives
for resource recovery and contributing to the reduction of greenhouse
gases and other criteria pollutants. This describes the manufacturing
process, the factors for evaluating alternative materials, and
the types of fuel and raw material alternatives that can be
used beneficially (SN2868; no charge; PDF only).
More
info
Revision of Test Methods and Specifications for Controlling
Heat of Hydration in Hydraulic Cement: This research
analyzes and reviews current practice for determining heat of
hydration of hydraulic cement (ASTM C 186) for purposes of acceptance
and identifies alternative technologies. The study concludes
that isothermal conduction calorimetry offers a number of advantages
over the current practice based on isothermal solution calorimetry.
A draft test method was developed for ASTM ballot, and the logic
behind the major details of the test method is documented (SN3007;
no charge; PDF only).
More
info
Predicting Temperature Rise and Thermal Cracking
in Concrete: This study developed a simplified
thermal simulation tool for predicting the temperature rise
due to hydration within concrete elements, including those that
contain slag or fly ash. The goal was to perform a rough thermal
analysis without requiring detailed technical inputs. The simulation
is designed to perform its analysis on a 2-D section through
the element using a finite difference method, taking into account
surface convection and conduction to adjacent materials, as
well as solar radiation. An experimental program involving isothermal
heat-conduction calorimeter testing was used to help populate
the model with data for cementing materials commonly available
in Ontario, including several portland cements and a number
of blast-furnace slags and fly ashes at various replacement
levels. Results from the simulation are compared to the results
of two different field trials involving mass concretes with
high levels of SCM replacement (SN3030; no charge; PDF only).
More
info
Shapes in Stone: Images of Concrete Architecture
From PCA’s Photo Archive: Interesting, innovative,
beautiful, and often unusual concrete buildings are featured
in this DVD compilation of some 1100 photos from PCA’s
photo archive. The buildings, many of them firsts of their kind,
include residential, religious, commercial, and industrial structures
in the U.S. and Canada. This collection covers the period from
1850 to 1999 (DVD033; $35.00, less discounts).
More
info
RCC is Pavement of Choice for
Maine Paper Mill: This two-page case study describes
the use of roller-compacted concrete (RCC) as an industrial
pavement for a paper mill in Maine. RCC was selected because
of its high strength and rapid placement. The design achieved
7-day strengths of almost 1000 psi flexural and 6800 psi compressive
strength using a pre-blended cement containing 7% silica fume.
The 11,100 square yards of 9-in. thick RCC pavement was placed
in only 2 days. An added benefit was the lower cost of RCC allowed
the owner to place an additional 33% more pavement and still
meet the original budget (PL623; printed copies are $7.50, no
discounts, for a pack of 25; PDF is free).
More
info
Permeable Interlocking Concrete Pavements, 3rd Edition:
Permeable interlocking concrete pavements offer an environmentally
friendly way of providing long lasting, beautiful pervious walks
and driveways. This guide provides background and design specifications
for construction and maintenance of permeable pavement made
with concrete pavers (LT155; $24.00, no discount).
More
info
Permeable Interlocking Concrete Pavement: This
two-page Tech Brief (No. 19) is a nontechnical overview designed
to introduce the building industry and consumers to the value
of permeable interlocking concrete pavements. These systems
effectively filter and drain stormwater back into the soil,
while the availability of many lighter colors can help reduce
heat on site. These rich-looking pavers feature patterns and
textures to complement any landscaping (IS318; printed copies
are $15.00, no discounts, for pack of 50; PDF is free).
More
info
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For more information
or to register, contact Julie
Lisiecki.
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Pulverized
Fuel Guidelines for the Cement Industry
September 18, 2007
Bethlehem, Pa.
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Raw
Mix Chemistry
September 19, 2007
Bethlehem, Pa.
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ACI
Certification Program
September 21, 2007
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Aggregates
and Chemical Admixtures for Use in Concrete
October 1-2, 2007
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Kiln
Process
October 1-4, 2007
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Mill
Grinding
October 22-24, 2007
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Concrete:
Principles & Practices
October 22-25, 2007
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Troubleshooting:
Solutions to Concrete Field Problems
November 5-7, 2007
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Cement
Manufacturing for Process Engineers
November 5-8, 2007
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PCA
Fall Committee Meetings
September 10-12, 2007
Chicago, Ill.
More
information |
IEEE West
Coast Industry Technical Conference
September 20-21, 2007
Sheraton Gunter Hotel
San Antonio, Texas
More
information |
3rd Annual
Joint Western Regional Mine Safety and Health Conference
October 22-25, 2007
Las Vegas, Nev.
More
Information
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2nd Annual Southeastern U.S.
Mine Safety and Health Conference
November 13-13, 2007
Pensacola Beach, Fla.
More
Information
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of PCA and to individuals interested in PCA activities or
the cement, concrete, and construction industries.
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Skokie, Illinois 60077
847.966.6200 info@cement.org
500 New Jersey Ave. N.W.
7th Floor
Washington, D.C. 20001
202.408.9494 fax 202.408.0877 |
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©2007 Portland Cement Association
All rights reserved
The Portland Cement Association conducts market development,
research, education, and government affairs work on behalf
of
its members—cement companies in the United States and
Canada.
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