Abstract：Under the loading condition of isothermal process , the experimental result shows that the inf rared radia2 tion energy of concrete is varied markedly with the change of pressure. This change is caused completely by pres2 sure , and independent of temperature with no intermediate physical process of heat generating. This physical phe2 nomenon has not been presented before. The new principle , method and technology for the st ress measurement in concrete engineering are put forward. The experimental basis and the physical foundation are offered for the mea2 surement of st ress and temperature abnormality with the inf rared remote sensing , and for the engineering stability monitoring and unstability prediction , etc.
