I. Highway Planning, Management, Performance Evaluation & Instrumentation

4. INSTRUMENTATION AND MICRO-PROCESSOR APPLICATIONS

B. ON GOING PROJECTS
3. Design and Development of Roller Mounted Nuclear Density Gauge for Continuous Measurement of Density at the time of Construction of Pavement Layers
Date of Start:
August 2003
(i) Central Road Research Institute, New Delhi (R, I)
(ii) Council of Scientific and Industrial Research (CSIR), New Delhi (S)

 

Present Status and progress
Roller mounted nuclear density gauge has been developed. Laboratory studies have been conducted with the gauge. To check the consistency of the readings as the gauge revolves, the readings were obtained when the drum touches the density standards at various points on its circumference. The results show that there is no change in readings as the drum revolves. Studies were also conducted with changing the speed at which the gauge moves and we found that there is no effect of change in speed on count-rate

Soil densities obtained in the field by conventional method were compared with the results obtained using the gauge. The results are comparing well with those obtained by conventional method.