Uploaded March 2025 | Updated September 2026, 22 hours ago
Geogrids have been used in several TxDOT Districts to reinforce Hot-Mix Asphalt (HMA) in order to minimize reflective cracking. Field evaluations have revealed that polymeric geogrids within HMA resulted in an additional promising benefit—increasing structural capacity and consequently reducing the HMA overlay required thickness. Despite strong field evidence, important questions remain concerning proper geogrid selection criteria for this new application. Researchers evaluated different types of polymeric and glass geogrids thru instrumented field test sections along State Highway 21 (SH21). This project validated constructability and assessed long-term field performance to develop practical specifications for TxDOT on use of geogrids with HMA.
For more information on research project 0-7002, check out the TxDOT Research Library project record here:
https://library.ctr.utexas.edu/Presto/content/Detail.aspx?ctID=M2UxNzg5YmEtYzMyZS00ZjBlLWIyODctYzljMzQ3ZmVmOWFl&rID=NjQ2&qrs=RmFsc2U=&q=KHJwLlN0dWR5Tm86KCIwLTcwMDIiKSlPUihjYXRhbG9nLlN0dWR5Tm86KCIwLTcwMDIiKSk=&ph=VHJ1ZQ==&bckToL=VHJ1ZQ==&rrtc=VHJ1ZQ==
For access to all TxDOT research, please visit the TxDOT Research Library at https://ctr.utexas.edu/library/
Geogrids have been used in several TxDOT Districts to reinforce Hot-Mix Asphalt (HMA) in order to minimize reflective cracking. Field evaluations have revealed that polymeric geogrids within HMA resulted in an additional promising benefit—increasing structural capacity and consequently reducing the HMA overlay required thickness. Despite strong field evidence, important questions remain concerning proper geogrid selection criteria for this new application. Researchers evaluated different types of polymeric and glass geogrids thru instrumented field test sections along State Highway 21 (SH21). This project validated constructability and assessed long-term field performance to develop practical specifications for TxDOT on use of geogrids with HMA.
For more information on research project 0-7002, check out the TxDOT Research Library project record here:
https://library.ctr.utexas.edu/Presto/content/Detail.aspx?ctID=M2UxNzg5YmEtYzMyZS00ZjBlLWIyODctYzljMzQ3ZmVmOWFl&rID=NjQ2&qrs=RmFsc2U=&q=KHJwLlN0dWR5Tm86KCIwLTcwMDIiKSlPUihjYXRhbG9nLlN0dWR5Tm86KCIwLTcwMDIiKSk=&ph=VHJ1ZQ==&bckToL=VHJ1ZQ==&rrtc=VHJ1ZQ==
For access to all TxDOT research, please visit the TxDOT Research Library at https://ctr.utexas.edu/library/
