The effect of the cavity pressure on the distribution of local shrinkage was investigated for five nominal hold pressures of 27.6 (4), 41.4 (6), 55.2, 68.9 (8), and 82.7 MPa (12 x [10.sup.3] psi).
The shrinkage distribution over a plaque surface was calculated from the measured locations of the scribe line intersections on the mold surface and the corresponding scribe line imprints on the molded plaque surface.
Mathematical models (Table 1) were fitted to the experimental data of volumetric shrinkage of the mass and unit volumetric shrinkage of the safflower grains.
The experimental data relative to the unit volumetric shrinkage and volumetric shrinkage of the mass were subjected to nonlinear and linear regression analyses, through the Gauss-Newton method.
Fatigue tests were performed under stress and strain control for the sound material condition and under stress control for the specimens with shrinkages.
For the specimens with shrinkages, the test frequencies f varied during testing depending on the magnitude of shrinkages in the specimens, due to a reduction in the specimen's stiffness as demonstrated in Figure 5.
Prism specimens measuring 100 x 100 x 515 mm were prepared for the drying shrinkage test.
The drying shrinkage of the concretes was measured right after the wet curing period.
Although the importance of moisture gradients in shrinkage
and cracking was pointed forward early , little has been revealed for the true moisture field due to the combination effects of thermal hydration and circumstance drying process.
Thus, the objectives of the present study are (i) to determine the effect of altered soil structure on soil shrinkage
processes after applying saline-sodic water, and (ii) to evaluate soil shrinkage
behaviour through parameters in relation to soil properties.
Four main types of shrinkage
associated with concrete are plastic shrinkage
, autogenous shrinkage
, carbonation shrinkage
, and drying shrinkage
Figure 2 shows the trend of variation in the shrinkage
stresses at 80 [degrees]C and varying RHs as a function of drying time.