Second,obtains closed but including burrs contour lines by using contour lines connection and deformed dilation.

Tests on swelling deformation of expansive soils;

Effect of swelling deformation on stability of expansive soil slope

This paper founds the relation of porosity, permeability and swelling deformation under considering swelling deformation made by coal adsorption gas, and by analysis it can be concluded that as gas stress in the coal bed increases, the swelling deformation becomes bigger, the porosity being much smaller, so as to weaken the permeability of the coal bed and make it difficult for gas flow.

Two models of steel slag filled-up road embankment are made to simulate their dilatancy.

Experimental research on expansive deformation of tertiary red sandstone in Nanjing;

Based on the measuring results of expansive deformation of self-stressing concrete reinforced with various ratios of reinforcement as well as steel fiber volume fractions at the ages from 1 day to 28 days, the different phases of expansive deformation with the age were investigated.

Addition to initial expansive rate and final expansive deformation,half-value time of expansive deformation process was employed to construct the mathematical property set of deformation-time model.