The effects of different temperatures on compressive strength and bulk density were studied.

A test is done on pre-baked anode made from calcined coke in aspects of apparent density,real density,porosity,resistivity of powder,compressive strength,which shows compressed petroleum coke improves its chemical and physical performances.

In order to save the required energy for grinding the slag, the compressive strength of the slag is reduced by inducing cracks in it with the help of microwave.

These physical properties were correlated with the crushing strength of unglazed-fired tiles.

Support vector machine, a new computational method that have powerful prediction ability and can avoid over-fitting, has been used for optimizing processing parameters (content, particle size, and firing temperature of added silicon) in the preparation of alumina-carbon material and establishing the model of their influence on cold crushing strength of samples.

Based on the production data of 1997 s,the regression equation of the relationship among cold crushing strength,volume density and granular conformation of magnesitecarbon bricks is obtained.

The results show that: the fillers of SiO_2 based investment consist of SiO_2,Al_2O_3 and MgO,and the binder is NH_4H_2PO_4;for SiO_2 based investment,the bulk density and the compression strength decrease,the apparent porosity and the thermal expansion increase,when the specimens are heated to 900 ℃;the fil.

According to the geometrical structure of the elbow-rubber hose reinforced by spiraled cords threads, its calculation formulation of compression strength is derived on the base of the stress analysis with the inner-pressure.