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- W2183664229 abstract "An apparatus for study of the coefficient o f th ermal expansion of steel, glass and other bui ld ing and in sulatin g materials like gypsum, cellular concrete, has been se t up. The apparatu s is based on Linear Va ri able Differentia l Transducer. The measured values have been compared with the standard values and found within ± 5 to 10 %. The details of apparatus have also been discussed . Changes in temperature of materials are generally accompanied by dimensi onal changes. This phenomenon is refened to as thermal expansion. In the absence of changes in the character of atomic bonding and structural modifications, thermal expansioin occurs' in a continuous and usually monoatomic manner. Thermal expansion of solids can display disconti nuous or irrevers ible behaviour due to such effects on crystallographic 2 transformations. Recrystallization of structural reanangements in such materials as glasses, decomposition reactions, densification of porous solids, creep deformation, can contribute to unusual thermal expansion behaviour. Thermal expansion is one of the thermal properties of mateials, the study of which is very essential in engineering design. The thermal shock resistance is a relative measure of degree of resistance of material to sudden temperature changes without cracking and is estimated fro m the ratio KS/aE (ref. 3-5), where K is the thermal conductivity; S is the strength, a is the coefficient of thermal expansion and E is the modulus of el astic ity. Thermal expansion is an important property that rel ates directl y to bonding forces between atoms in a sol id materials. The authors have developed method for measurin g the thelma I expansion of the sol ids used as building material s and insulations. This method is intended to provide a means of determining the coefficient of linear expansion of the materials which are not distOlted or indented by the thurst of the di alatometer on the specimens. The specimens is placed tightly with base of furnace so that expansion must be in the upward direction only. the temperature at which the thelma I expansion is measured is fix ed by temperatme controller device." @default.
- W2183664229 created "2016-06-24" @default.
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- W2183664229 date "2000-08-01" @default.
- W2183664229 modified "2023-09-27" @default.
- W2183664229 title "Apparatus for measurement of thern1al expansion of building and insulating materials" @default.
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