In-situ measurements of interlocking concrete pavement response to vehicular loading and environment

This paper presents an innovative research project involving the design, construction and instrumentation of seven interlocking concrete pavement (ICP) crosswalks. In total there are four different structural designs presented. These were constructed at the Centre for Pavement and Transportation Technology (CPATT) test track and at the University of Waterloo Ring Road in 2007 and will involve the development of mechanistic-empirical design models for ICPs. Each of the test sections is instrumented with four sets of sensors to monitor the pavement performance under heavy truck traffic, typical municipal loadings and to quantify environmental effects. Data is collected at four hour intervals and includes stresses, strains and temperature. Moisture data is collected on weekly basis using time domain reflectometry probes. A database is being generated for all seven sections and the measured stress, strain, temperature and moisture measurements are analysed to evaluate the expected long-term performance of the structural components of ICP crosswalk designs. Truck loading data based on loading configuration is being collected using Weight-In-Motion at the CPATT test track. In addition, routine PFWD testing is performed to determine the in-situ conditions of the pavement structures. This paper outlines the design, instrumentation, and initial pavement performance for the seven crosswalk sections. The paper also provides some data and in-situ performance of the seven crosswalks.