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what is the design mix concretedetermination of the proportions of cement aggregates and water to achieve the required strengths in
concrete mix proportionsconcrete mix proportions should be chosen in such a way that concrete of adequate workability is obtained workability of
modulus of elasticity of light-weight concrete the modulus of elasticity of light-weight concrete is about 50 to 55 of that of normal-weight concrete
light-weight aggregate prestressed concretethe use of light-weight aggregate concrete for prestressed concrete construction is well established
state the moulds in prestressed concretemoulds for pre-tension work should be sufficiently strong and rigid so that they can withstand the effects of
mobile computing1what is wireless protocol requirements and also explain in brief medium access control protocol2illustrate fdma and tdma
define the meaning of grout - concretegrout should be made with any type of recommended cement and using water of a required quality if very large
strength of concrete at the transfer stage concrete strength in the member at the transfer stage should conform to the design requirements the
state the modulus of elasticity of concrete the youngs modulus of elasticity of concrete is primarily influenced by the elastic properties of the
determine the term- shrinkage of concreteshrinkage of concrete is primarily due to gradual loss of moisture which results in change in volume the
define the concept of creep of concretecreep of concrete is another important characteristic it represents progressive strains in concrete which
durability requirements for concreteeven though the alkaline environment of concrete protects steel carbonation of hydrated cement may decrease the
determine about the hard-drawn steel wireshard-drawn steel wires which are indented or crimped are preferred for pre-tensioned members as their bond
state about the prestressing steel for prestressed concrete members the high-tensile steel used generally consists of wires bars or strands the high
permissible stresses in steel as per the indian code the permissible stresses in the tendons at the time of initial prestressing should not exceed 80
determine the types of untensioned reinforcement reinforcement used as untensioned steel should be one of the following types a mild steel and
explain the term - untensioned reinforcementin prestressed concrete construction use of untensioned reinforcement also has to be made alongwith
explain about the hydrogen embrittlement as a result of the action of acids on high-tensile steels liberation of hydrogen takes place it penetrates
what is stress corrosion stress corrosion takes place in prestressed concrete tendons due to the combined actions of corrosion and static tensile
state the term - relaxation of stress in steel if we keep a high-tensile steel wire stretched and maintained at a constant strain the value of the
tensile stressesit has been possible to introduce tensile stresses of upto 850 nmm2 in tendons with the use of this method but the method is not
fundamentals of it1explain the impact of information technology on governments and educational organizations2explain application and system
chemical prestressing in prestressed concrete normally tendons are stretched and are retained in a stretched condition by concrete consequently
state the procedure of prestressingwhen these wires cool down concrete is poured in the moulds in which these tendons are provided in a stretched
what is thermo-electric prestressing we know that stretched tendons are used in prestressed concrete stretching of tendons may be accomplished by