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Author: |
Grant Lee |
Created: |
7/7/2009 12:54 PM |
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Industry-related issues are identified and explored to give some insight into perceptions held about precast reinforced concrete pipe and boxes. |
By Grant Lee on
2/3/2010 11:05 AM
The applications for precast concrete boxes go far beyond the common application of roadway culverts and small bridges. The ways they can be used for projects keeps expanding.
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By Grant Lee on
1/2/2010 6:03 AM
Concrete is one of the world’s most commonly used building materials. In its simplest form, concrete is a mixture of paste and aggregates.
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By Grant Lee on
12/3/2009 9:16 PM
In regions susceptible to massive flooding and wildfires, the application of concrete pipe and boxes for culverts and associated storm sewers makes sense because concrete culverts don’t burn, they resist buoyancy, have installation savings, are strong and durable, can be used for stormwater retention, and producers are nearby to supply products in a hurry.
If the decisions to use materials and products that corrode quickly, incinerate, or float away are not technical in nature, then the public deserves an answer from their elected officials why their taxes are being used to support temporary roads, sewers and culverts.
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By Grant Lee on
11/5/2009 7:07 AM
Concrete pipe mixtures incorporate industrial by-products (such as fly ash and slag cement), which reduces the use of virgin materials, reduces the amount of cement needed, reduces the energy needed to manufacture the product and conserves natural resources. In addition, concrete made with fly ash is more durable and has a higher ultimate strength.
The steel that is used in reinforced concrete pipe is typically made of 90 to 100% recycled steel, which itself can be recycled. Materials that can be recycled at the end of their intended use reduce the amount of waste that is land filled and reduces the need for virgin construction material.
Concrete pipe is renewable and 100% recyclable. Due the durability and strength of concrete pipe, it can be reused.
We are always interested in ways that concrete pipe can be reused in applications other than storm and sanitary sewers, and culverts. When concrete pipe is excavated for replacement with larger diameter pipelines to accommodate growth, how have you re-used the pipe?
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By Grant Lee on
10/13/2009 7:46 AM
Precast concrete pipe outperforms plastic or metal conduits for stormwater and sanitary sewer applications. Concrete’s rigidity and mass allow for easy and secure placement in the trench, without disrupting line or grade. Plus, precast concrete pipe joints are easily assembled, which helps minimize the time needed for installation. Precast concrete pipe is the best option when installation time matters, or when the soil poses challenges to installation.
Since concrete pipe is a rigid product that is often more than 85% dependent on the pipe strength and approximately 15% dependent on the strength derived from the soil envelope, installation is made easy. The installation of plastic or metal pipes can take longer than precast concrete pipe. That’s because the structural and hydraulic integrity of flexible pipes rely heavily on how well the surrounding soil is prepared at installation. Widely accepted Standard Installations provide options for installing concrete pipe that are not options for flexible pipe.
It is important to fully understand the differences between rigid and flexible pipe installations, especially when time is a factor in the construction schedule and long-term performance is an element of a municipality's asset management program.
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By Grant Lee on
8/4/2009 8:04 PM
Much of the concrete sewer and highway drainage infrastructure working for us today was installed decades ago – some installed at the close of the 19th century, and beginning of the twentieth. Storm and sanitary sewers, and culverts made of concrete pipe and boxes are a legacy that will benefit Canadians for generations. Do you agree? Why do you believe that concrete pipe remains a product of choice for many contractors.
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By Grant Lee on
7/8/2009 8:48 PM
The gravity pipe industry is, and will continue to be, a specifications-driven industry. It will be based on advances in scientific knowledge and the application of that science by engineers. With globalization quickly engulfing our economy and subsequently our industry, projecting what the industry may be like even ten years from now, is a challenge.
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