Field Tests

Project LocationFull-Scale Field Test Project Location: Kennesaw State University, Marietta Campus.

  • Construction of demonstration wall begins.

    Progress:

    • Wire frame baskets completed
    • Donated concrete broken into rubble of varying aggregate size, then dumped into baskets to create wall structure
  • Progress:

    • Demonstration Wall almost completed; still needs some more rubble and cement cover
    • Temporary fencing set in place at project site for house construction
  • Progress:

    • Foundation has been dug out. Rubble and cement to be filled in tomorrow
  • Progress:

    • Rubble samples collected for performing strength tests
    • Foundation formed using rubble and concrete
  • Progress:

    • Concrete placed to continue forming foundation
    • Rubble Baskets constructed from welded wire mesh and chicken wire netting
  • Progress:

    • Cement mixer used to help make concrete, speeding the process to complete foundation
    • Baskets for three walls were anchored along foundation with wood framing. Rubble is ready for placement
  • Progress:

    • Rubble filled into wire baskets for 3 of 4 walls
  • Progress:

    • More rubble brought to site (to fill final wall) along with large I-beams (for testing equipment)
    • Basket for final wall secured in place
  • Progress:

    • Rubble filled in all four walls
    • Placement of concrete finish (stucco) has begun
    • ATS has begun assembling the loading frame
  • Progress:

    • Concrete added to cover rubble and mesh on building structure
    • ATS completes construction of loading frame with hydraulic jack equipment
    • Parts for displacement frame and gages assembled
  • Progress:

    • Wall demolitions were conducted for the public, as demonstrated in the following videos.
    • Unreinforced concrete masonry showed extensive brittle failure when hit with the battering ram. The ram was only able to puncture holes in the "rubble wall", causing localized failure on the outer surface
    • Initial tests on static loading were conducted. Two hydraulic jacks were fixed to each wall corner. Each was loaded in increments from 100 psi to 790 psi. Displacement/deflection were recorded using: Displacement gage frame (homegrown), Video camera footage, Manual surveying techniques, and 3D point cloud scanner (laser scanning)
  • Progress:

    • Further static load testing was conducted
    • Hydraulic jack placed to apply loads to center of the wall
  • Progress:

    • Triangular rubble column subjected to sag test to measure potential deflection from rubble weight
  • Progress:

    • Rubble house demolition (service provided by ATS)

  • Progress:

    • Rubble removed from premises (courtesy ATS)

 

©