A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effectiveness of Controlling Pavement Roughness Due to Expansive Clays with Vertical Moisture Barriers
This report summarizes the results and conclusions of a five year study of the effectiveness of vertical moisture barriers in controlling the roughness of pavements resting on expansive clay subgrades. During the study, vertical moisture barriers were installed at six sites in three of the seven climatic zones in Texas. Site maps are given for each site showing the location of the moisture barriers and the moisture sensors relative to the pavements along which they were placed. The moisture (suction) was monitored on both sides of the barrier for the remainder of the period of this study. In addition, the surface profiles of these pavements in each lane were measured every six months with the TxDOT GM profilometer. Samples of the soil were taken and laboratory tests of the Atterberg limits, grain size distribution and suction vs. water content relations were made. Measured pavement roughness as indicated by the serviceability index, International roughness index, and bump height are compared with the same values predicted using the computer program and show that realistic trends can be predicted. Appendices show how to measure suction with filter paper and record all of the field measurements of suction and pavement roughness that have been made in this study.
Effectiveness of Controlling Pavement Roughness Due to Expansive Clays with Vertical Moisture Barriers
This report summarizes the results and conclusions of a five year study of the effectiveness of vertical moisture barriers in controlling the roughness of pavements resting on expansive clay subgrades. During the study, vertical moisture barriers were installed at six sites in three of the seven climatic zones in Texas. Site maps are given for each site showing the location of the moisture barriers and the moisture sensors relative to the pavements along which they were placed. The moisture (suction) was monitored on both sides of the barrier for the remainder of the period of this study. In addition, the surface profiles of these pavements in each lane were measured every six months with the TxDOT GM profilometer. Samples of the soil were taken and laboratory tests of the Atterberg limits, grain size distribution and suction vs. water content relations were made. Measured pavement roughness as indicated by the serviceability index, International roughness index, and bump height are compared with the same values predicted using the computer program and show that realistic trends can be predicted. Appendices show how to measure suction with filter paper and record all of the field measurements of suction and pavement roughness that have been made in this study.
Effectiveness of Controlling Pavement Roughness Due to Expansive Clays with Vertical Moisture Barriers
R. Jayatilaka (author) / D. A. Gay (author) / R. L. Lytton (author) / W. K. Wray (author)
1993
238 pages
Report
No indication
English
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