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Cementx Pavement Blog

SOIL-CEMENT CONTINUES TO BE BIG IN TEXAS DAMS

7/12/2017

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By: Kenneth D. Hansen, PE
Texas is entering a new era in dam building to satisfy the need for increased water supply for municipalities, industry and agriculture. The five mile long Lane City Reservoir (links to information sheet and  video) in Wharton County will be the first large reservoir built in Texas this century. It will be closely followed by Lower Bois d’Arc Dam in Fannin County, an expansion of Harris reservoir in Brazoria County and Allens Creek reservoir in Austin County.

All of these new embankment dams are expected to utilize soil-cement to protect their upstream slopes from waves which could be generated by hurricane force winds. Soil-cement in Texas has proven to be a less costly and a better performing solution for slope protection than rock riprap- which is not readily available in most of Texas.

The use of soil-cement for protecting major dams in Texas goes back more than 50 years. Much has been learned from the performance of these early soil-cement protected dams. These lessons will be summarized by me during a Soil-Cement Short Course to be held at Wharton, Texas on September 14, 2017. The program includes a night tour of soil-cement being placed by the latest specialized equipment and methods on the Lane City reservoir being built for the Lower Colorado River Authority (LCRA).  Phillips and Jordan is contractor for the CH2M-designed embankment.

What has been learned from the original Bonny Reservoir, Colorado soil-cement test section built by the US Bureau of Reclamation in 1951 will be presented.  It will be followed by lessons I learned from being involved in the following major soil-cement protected projects in Texas – Toledo Bend Dam, the cooling water reservoirs for the Barney M. Davis Power Station and the South Texas nuclear plant, Palmetto Bend Dam (forms Lake Texana) and Choke Canyon Dam. All of these dams have been performing as designed for more than 35 years. 
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In addition to hearing about the purpose, design and construction of the Lane City reservoir, registrants will be introduced to soil-cement being used to protect stream banks.  Soil-cement for this application has been well received and well tested for protection of erodible sandy river banks from floods in urban areas of Arizona, southern California, New Mexico and Colorado.

Ken Hansen Bio
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NEW FDR GUIDE RELEASED, FEATURED IN CCT'S STABILIZATION/RCC SEMINARS

7/7/2017

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By: Jan R. Prusinski, PE
The National Concrete Pavement Technology Center (CP Tech Center) at Iowa State University has recently published a comprehensive "Guide to Full-Depth Reclamation (FDR) with Cement."  This 90-page manual was developed in cooperation with the Portland Cement Association and many product experts from around the country, including CCT's own Matthew Singel.  It will serve as a centerpiece in CCT's just-announced one-day seminar series "Best Practices for Cement Stabilization and Roller-Compacted Concrete Pavements," to be held at seven Texas locations between August and December, 2017.

FDR is often the lowest-cost method of recycling failed asphalt pavements into highly durable bases.  It is an in-place operation that pulverizes the existing surface and base, then adds a small amount of cement to provide a fast-curing and long-lasting base that stands up to heavy trucks and saturated conditions.  Construction is fast, often completed in one day, so light traffic can be applied afterwards; and the need to excavate huge amounts of old material and replace it with new base material--and the associated heavy truck traffic--is avoided.

The guide provides not only an introduction to FDR with cement, but it also comprehensively covers key topics:
  • Properties and materials
  • Project evaluation (when is FDR appropriate?)
  • Structural design
  • Mix design
  • Construction
  • Inspection and testing
  • Long-term performance
The guide is geared for design, testing and construction professionals, so that they can properly utilize this highly economical and durable asphalt pavement recycling method.  

If you are interested in being trained in this technique, using the new guide, please consider attending one of the CCT's 7 upcoming seminars.  To find out more about FDR, and download the guide, visit the CP Tech Center's website.
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100 YEAR-OLD CONCRETE STREET: AN EXAMPLE OF HOW TO IMPROVE ASCE'S D+ GRADE

7/7/2017

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By: Jan R. Prusinski, PE
San Antonio's Belknap Place is over a century old, and still going strong.  Last May, it was commemorated with a Texas State Historical Marker, and in December the American Concrete Pavement Association presented its Longevity Award to the City for Belknap Place.  As President Trump contemplates a $1 trillion infrastructure investment, and the ASCE discusses America's overall D+ in its 2017 Infrastructure Report Card, Belknap Place stands as a monument to wise public investment in a resilient technology. Click here for a Belknap Place slideshow and report.
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    PURPOSE

    The Cementx Pavement Blog seeks to make pavement owners, engineers and contractors smarter about selecting, designing, constructing and maintaining pavements. New blog postings began February 1, 2017; however, we carried over pavement-related blog postings from our older blog, the "Texas Cement and Concrete Blog," which ran until December 2016.

    Authors

    Jan R. Prusinski, PE
    Executive Director

    Richard B. Rogers, PE
    Sr. Director, Concrete Pavements

    Matthew W. Singel
    ​Director, Soil-Cement and RCC Pavements

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​The Cement Council of Texas promotes the proper use of cement and concrete in pavements, infrastructure, buildings, homes and other construction applications.  We are the non-profit trade association of portland cement manufacturers and shippers in Texas.

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​Email: info@cementx.org
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The materials and information contained herein are for general guidance and reference purposes only for professionals competent to evaluate the significance and limitations of their content.  The materials and information do not constitute a standard, specification, or regulation.  Third party materials reflect the views of the authors, who are responsible for the accuracy of the facts, data, opinions, findings, and conclusions presented therein.  The contents do not necessarily reflect the official views or policies of the Cement Council of Texas.
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  • Home
  • Pavements
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  • News & Resources
    • News
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  • Blog
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  • About
    • Who We Are
    • CCT Members
    • CCT Staff >
      • Richard B. Rogers, PE
      • Amy C. Swift
      • Nancy Aguirre Beltran, PhD., EIT
      • Randy Bowers, PE
    • Contact and Subscribe