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accelerated pavement testing

Pavement Design and Accelerated Pavement Testing Research Facilities

March 1, 2022 By EMI

This is a guest blog by Emil G. Bautista

Traditionally, pavement engineers around the world, and mainly in the United States, design flexible and rigid pavements based on the American Association of State Highway and Transportation Officials (AASHTO) method. This methodology was developed in the late 1950s in Ottawa, Illinois, under what was called then the AASHO Road Tests. The AASHO Road tests are considered by many road engineers to be one of the first references of experimental data that takes into consideration the interaction between the vehicle and the road in the design of the pavement, and aid in determining how traffic influences the deterioration of roadways. For this reason, the AASHO Road Tests can be considered as one of the very first accelerated pavement testing (APT) facilities.

With the help of the AASHO Road tests from the 1950s, the performance of the pavement structures of known thickness under moving loads of known magnitude and frequency was observed, and the results obtained were the source to develop the pavement design guides that pavement engineers use to design flexible and rigid pavement structures.  The first version of what is known today as the AASHTO Pavement Design guide was published in 1961, with major updates issued in 1972 and 1993. In 1998, a supplement to the 1993 guide was published and its use continues nowadays in the United States and around the world.

[Read more…] about Pavement Design and Accelerated Pavement Testing Research Facilities

Filed Under: Civil Engineering Tagged With: AASHO Road Tests, AASHTO, accelerated pavement testing, Emil G. Bautista, empirical methods, LTPP, Mechanistic-Empirical Pavement Design Guide, Pavement Design, pavement design guides, pavement engineers, pavement structures, Pavement Testing Research Facilities, rigid pavements

Implementation of Research from Accelerated Pavement Testing Facilities

September 21, 2021 By EMI

This is a guest blog by Emil G. Bautista

In my last blog, I emphasized the importance of our highway system to our society in supporting the economy of countries around the world by continuously moving people and goods from one point to another, and the role that accelerated pavement testing (APT) facilities plays in providing DOT and industry engineers, through research and the collection of quality data, with the tools to achieve the common goal of ensuring lasting effects on tomorrow’s infrastructure with the decisions we make today.

Since the construction of MnROAD on Interstate-94 by the Minnesota Department of Transportation (MnDOT) in 1993, other APTs have been constructed. I previously mentioned the National Center for Asphalt Technology (NCAT) test track in Alabama originally constructed in 2000. More recently, we can see how the example set by these two APTs is influencing the construction of others; the Florida Department of Transportation (FDOT) has initiated the construction of a 2.5-mile concrete test road, long a northbound segment of US-301, which is expected to open to traffic by the end of 2021.

These test road facilities provide the ground for a comprehensive in-service performance assessment of different pavement technologies and innovative concepts while considering the interaction between factors such as traffic loading, materials properties, environmental conditions, design features, and construction practices. APTs serve as the foundation for engineers to work toward implementing new and emerging technologies, and it is of great importance to be able to have not one, but multiple APTs throughout the country that can work together in providing quality data on materials, weather, and traffic from different regions.

Working together is a key factor on the road toward implementation of the research conducted on these facilities. An African proverb says: “If you want to go quickly, go alone. If you want to go far, go together.” This a great way to see implementation by working together as a major factor to accomplish it, but it is also important to understand that it takes time and, therefore, things do not necessarily happen quickly. Implementing research findings from advanced pavement testing facilities requires the creation of alliances and associations that can group state agencies, industry, academia, and consultants.

Click Here to Read a Spanish Version of this Article

[Read more…] about Implementation of Research from Accelerated Pavement Testing Facilities

Filed Under: Civil Engineering Tagged With: accelerated pavement testing, advanced pavement testing facilities, APTs, emerging technologies, Emil G. Bautista, pavement technologies, problem-solving skills, test road facilities, traffic loading

Accelerated Road Research Facilities – The Key to Improving Our Highways

August 17, 2021 By EMI

This is a guest blog by Emil G. Bautista
Accelerated Road Research Facilities - The Key to Improving Our Highways

Highways as well as road research are an important part of the infrastructure of every country in the world. They provide the framework to move people and goods from one point to another, and this makes them an important piece to our economy and quality of life. As of 2006, according to the Bureau of Transportation Statistics, there were approximately 4.1 million miles (6.6 million kms) of roads in the United States, of which 2.7 million miles (4.3 million kms) were paved and 1.4 million miles (2.3 million kms) were unpaved.

Using a simple A-to-F school report card format, the American Society of Civil Engineers (ASCE) provides a comprehensive assessment of the United States infrastructure in their Infrastructure Report Card prepared every four years. For the year 2021, highways are graded as D with over 40% of the system in poor or mediocre condition. If we look into ways to improve the grade of our highway system, it is key to target investments and allocate funding — and for this, it is important that routine, reliable data becomes the standard.

For this reason, and looking into road research, it is important that decision-makers and engineers rely on accelerated pavement testing (APT) facilities to collect detailed performance data with the aid of different pavement sensors. Since APTs are considered large-scale, real-world laboratories, they allow us to conduct cutting-edge experimentation while avoiding the risk of failure on actual roadways.

Click Here to Read a Spanish Version of this Article

[Read more…] about Accelerated Road Research Facilities – The Key to Improving Our Highways

Filed Under: Civil Engineering Tagged With: accelerated pavement testing, Accelerated Road Research, American Society of Civil Engineers, Bureau of Transportation Statistics, decision-makers and engineers, Dr. Emil G. Bautista, economy and quality of life, infrastructure, Infrastructure Report Card, national research, pavement sensors, road performance, Road Research Facilities, United States infrastructure

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