Table 2 Material and binding mechanisms demonstrated with CRC.

TypeReferences
Discrete materials
  Bricks (square, rectangular, and heterogeneous)(14, 37, 42, 47)
  Struts(16, 26, 36, 40, 56)
  Sandbags(24, 57)
  On-site materials (rocks)(8, 17, 19, 62)
  Alternative (popcorn and toothpicks)(57, 61)
Continuous materials
  Hardening foams(10, 11, 30, 53)
  Fibers(31, 35, 66, 75)
  Concrete(2, 28)
Material binders
  Active and passive interlocking features(48, 64, 74, 76)
  Magnetism(13, 27)
  Glue(15, 36, 57)
  Melted plastic filaments(77)
  Living plants(63)