Concrete Technology and Design of Concrete Structures
High carbon content in the steel causes

increase in both tensile strength and ductility
increase in tensile strength but decrease in ductility
decrease in both tensile strength and ductility
decrease in tensile strength but increase in ductility

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Concrete Technology and Design of Concrete Structures
In prestressed concrete

both forces of tension and compres-sion as well as lever arm remain unchanged
forces of tension and compression change but lever arm remains unchanged
forces of tension and compressions remain unchanged but lever arm changes with the moment
both forces of tension and compres-sion as well as lever arm change

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Concrete Technology and Design of Concrete Structures
As compared to ordinary portland cement, high alumina cement has

higher initial setting time but lower final setting time
higher initial and final setting times
lower initial and final setting times
lower initial setting time but higher final setting time

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