Concrete Technology and Design of Concrete Structures
In counterfort type retaining walls i) the vertical slab is designed as a continuous slab ii) the heel slab is designed as a continuous slab iii) the vertical slab is designed as a cantilever iv) the heel slab is designed as a cantilever The correct answer is

(i) and (ii)
(i) and (iv)
(iii) and (iv)
(ii) and (iii)

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

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

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Concrete Technology and Design of Concrete Structures
Due to circumferential action of the spiral in a spirally reinforced column

Both the capacity of column and ductility of column increase
Capacity of column is decreased
Capacity of column is decreased but ductility of column increases
Ductility of column reduces

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