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Calculate the Modulus of elasticity of concrete
A pre-stressed concrete beam, having a cross-section of 150 mm width and 400 mm depth, is used over a span of 8 m. Straight tendons. which are having a stress of 1200 N/mm2, are provided with a constant eccentricity of 60 mm. The sectional area of tendons is 120 mm2. What shall be the percentage increase in stress in the wires when the beam supports a live load of 5 kN/m over whole of its span. The density of concrete is 24 kN/ m3. Modulus of elasticity of concrete and steel may be taken as 36 kN/m2 and 210 kN/m2 respectively.
Define Structural Damage - underwater inspection of bridge? Structural damage to the substructure below waterline can be classified as under: i. Construction damage or error
CEMENT RATIO MEANS
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A sample in a variable head permeameter is 8 cm in diameter and 10 cm high. The permeability of the sample is estimated to be 10 × 10 -4 cm/s. If it is desired that the head in th
Define Carbonation - underwater inspection of bridge? Carbon dioxide is present in the air and attacks the concrete directly. It has the effect of destroying the normal passivi
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Q. What is Imp rest Stores? Material obtained not for specific works but as a standing advance for the purpose of material urgent requirements as and when they arise should wit
In case of simple bending after simply supported beam, derive that M/I = s /y = E/R.
Define the Spalling - underwater inspection of bridge? A spall is a roughly circular or oval depression in the concrete. Corroding reinforcement can cause spalls and reinforcin
a) What are the laws governing compaction of (i) cohesion less soils like sand and (ii) moderately cohesive soils like sandy clay ? b) To what compaction pressure does the
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