Stress, Displacement, and Expansive Cracking Around a Single Spherical Aggregate Under Different Expansive Conditions.
Stress, Displacement, and Expansive Cracking Around a
Single Spherical Aggregate Under Different Expansive
Garboczi, E. J.
Cement and Concrete Research, Vol. 27, No. 4, 495-500,
aggregates; stress (mechanics); displacement; cracking
There seems to have been some confusion in recent years
regarding the stress and displacements induced in a
concrete material when either the matrix, the aggregate,
or a shell around the aggregate is expensive. The case
of a single spherical aggregate, surrounded by a single
shell of arbitrary thickness, all of which are embedded
in a matrix, can be solved exactly for any combination
of elastic moduli and expansive strains. Solutions of
this problem under various choices of parameters are
used to illustrate the features of stress, displacement,
and expansive cracking that are possible. These
solutions can then be used to help better understand the
features seen under the microscope in concretes that
have been damaged by different expansive forces.