Wednesday, June 17th, 2020
Roller compacted concrete (RCC) is a modified blend of concrete materials such as fly ash, Portland cement, water, sand, aggregates and additives that contains much less water than conventional Portland cement concrete. It has been in use for more than 50 years around the world and was initially used for dam construction as it was able to be placed quickly, had similar desirable properties to concrete and did not generate a high heat during hydration which can be a problem when placing mass concrete such as for dams. It began to be used in pavements, initially as a base or subbase but has been gaining more popularity in its use as a pavement surface. The RCC material is typically delivered by dump trucks and spread by specially modified asphalt concrete spreading equipment. RCC mixtures are compacted with the use of vibratory, tamper bar screeds, and typically but not always with static rollers to achieve a target density. RCC mixtures are relatively dry and depend on the stiffness as supplied to the job site to support the paver screed and rollers during placement and compaction operations. It does not require reinforcing or joint steel and is placed without forms.
The primary discussion topics of this webinar include:
- Basics of RCC pavement thickness design
- RCC Pave Software (Portland Cement Association Procedure)
- USACE Procedure (Army and Air Force)
- American Concrete Institute
- American Concrete Paving Association
- Subgrade preparation and materials for bases/subbases
- Material characteristics
- Use of recycled materials
- RCC Materials and mix design
- RCC detailing and transition treatments
- Quality assurance/control
- Key features to ensure pavement longevity
- Understand the key factors to determine the use of RCC for pavements
- Understand the importance of key design features
- Recognize important pavement material requirements
- Recognize construction requirements to ensure success
- Understand the factors that may impact the performance of RCC pavements
Instructor: David K. Hein, P.Eng.
David Hein is a consulting Civil Engineer with over 35 years of experience in the design, evaluation and management of pavement infrastructure. He recently retired from Applied Research Associates, Inc. of Toronto, Ontario. He is the past president of the American Society of Civil Engineers Transportation and Development Institute, long term member of the Transportation Association of Canada and has represented Canada on the World Road Association pavements and asset management committees since 2002. He has been involved in numerous national and international projects including many of the public/private/ partnership highway construction projects across Canada and the United States. Mr. Hein has completed numerous pavement design, evaluation and management projects throughout British Columbia including both design and management of the Sea to Sky Highway and is a regular instructor completing specialty design, construction and maintenance courses for the British Columbia Ministry of Transportation.
Webinar time: 9:00am - 10:30am Pacific Standard Time (PST)
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