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A platform for research: civil engineering, architecture and urbanism
Cyclic Plate Load Testing for Assessment of Asphalt Pavements Supported on Geogrid Stabilized Granular Foundation
This paper presents first of its kind field testing results with frequency and stress controlled in situ cyclic plate load tests (PLTs) to assess the performance of geogrid stabilized base layer under asphalt pavements. Field testing was conducted on two test sections in northern Minnesota with and without geogrid stabilization in the base layer. Cyclic PLTs were conducted on a 304.8 mm diameter flat plate using sinusoidal loading at frequencies ranging between 1.4 to 0.01 Hz and three cyclic stress levels (931 kPa, 655 kPa, and 345 kPa). Comparison testing with falling weight deflectometer (FWD) was also conducted at three applied dynamic loads. Cyclic PLT data was analyzed to determine the frequency and stress-dependent in situ composite resilient modulus (Mr-Comp), back-calculated asphalt dynamic modulus (E’AC), and resilient modulus of the base (Mr-Base) and subgrade (Mr-SG). Statistical analysis of the cyclic PLT results showed that there is about 11% increase in the composite modulus in geogrid section than in control section. Similar analysis of the FWD test results did not show statistically significant benefit with the presence of geogrid. Statistical analysis of the cyclic PLT results indicated that the Mr-SG has the most influence on Mr-Comp followed by the presence of geogrid, and Mr-Base. E’AC has the least influence on the composite response.
Cyclic Plate Load Testing for Assessment of Asphalt Pavements Supported on Geogrid Stabilized Granular Foundation
This paper presents first of its kind field testing results with frequency and stress controlled in situ cyclic plate load tests (PLTs) to assess the performance of geogrid stabilized base layer under asphalt pavements. Field testing was conducted on two test sections in northern Minnesota with and without geogrid stabilization in the base layer. Cyclic PLTs were conducted on a 304.8 mm diameter flat plate using sinusoidal loading at frequencies ranging between 1.4 to 0.01 Hz and three cyclic stress levels (931 kPa, 655 kPa, and 345 kPa). Comparison testing with falling weight deflectometer (FWD) was also conducted at three applied dynamic loads. Cyclic PLT data was analyzed to determine the frequency and stress-dependent in situ composite resilient modulus (Mr-Comp), back-calculated asphalt dynamic modulus (E’AC), and resilient modulus of the base (Mr-Base) and subgrade (Mr-SG). Statistical analysis of the cyclic PLT results showed that there is about 11% increase in the composite modulus in geogrid section than in control section. Similar analysis of the FWD test results did not show statistically significant benefit with the presence of geogrid. Statistical analysis of the cyclic PLT results indicated that the Mr-SG has the most influence on Mr-Comp followed by the presence of geogrid, and Mr-Base. E’AC has the least influence on the composite response.
Cyclic Plate Load Testing for Assessment of Asphalt Pavements Supported on Geogrid Stabilized Granular Foundation
White, David J. (author) / Vennapusa, Pavana (author) / Siekmeier, John (author) / Gieselman, Heath (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 296-307
2019-03-21
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2019
Geogrid reinforcement of asphalt pavements
| TIBKAT | 1983
Cyclic plate load test on geogrid-reinforced granular pad
| British Library Conference Proceedings | 2002