Compressive and Tensile Properties of Smart Piezoresistive Acrylamide Grouted Sand-PPT Presentation

PPT Presentation

Pdf Summary

The presentation describes the development of smart piezoresistive acrylamide-grouted sand for real-time monitoring of ground and infrastructure risks, including sinkholes and dam failures. The material combines sand, acrylamide grout, and conductive fibers, allowing changes in its electrical response to indicate mechanical behavior.<br /><br />Researchers characterized the material under compression and splitting-tension loading and evaluated its stress–strain and piezoresistive responses. They found that resistivity is the appropriate electrical property for monitoring. Measurements at 300 kHz can reduce the influence of the monitoring probes. Adding 0.03% conductive fibers—either carbon or basaltic—produced the best piezoresistive performance.<br /><br />Vipulanandan p-q models predicted the material’s stress–strain and piezoresistive behavior. The Vipulanandan failure model also matched the test data better than the Drucker–Prager model.<br /><br />The results support using smart grouted sand as a material that can both reinforce ground and provide information about its condition, potentially enabling earlier detection of failure.

Keywords

smart piezoresistive sand

acrylamide grout

real-time monitoring

sinkhole detection

dam failure

conductive fibers

resistivity

stress-strain behavior

Vipulanandan model

ground reinforcement