material elastic [
   	 name = aggregates
   	 rho = 2.7e-9   # density
   	 E   = 10 # young's modulus
   	 nu  = 0    # poisson's ratio
]

material elastic [
   	 name = paste
   	 rho = 2.7e-9   # density
   	 E   = 1 # young's modulus
   	 nu  = 0    # poisson's ratio
]