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Define Sulphate Attack - underwater inspection of bridge?
Cement contains a proportion of tricalcium aluminates, which takes part in the hydration process. These can react with magnesium sulphate, which is present in concentrations of about 0.5% in seawater. The reaction is expansive, but the presence of chlorides inhibits the degree of expansion. The net result is softening and disruption of the concrete in the form of crumbling.
Soil plug in marine piling system of steel tubular pile with reinforced concrete infill At the time of initial driving process, open-ended steel piles are driven through the s
Q. Why does pipe jacking machine usually get stuck when the ground condition change from soil to very hard rock? When pipejacking machine moves from anarea of soil to very hard
A group of 16 piles of 50 cm diameter is arranged with a centre to centre spacing of 1.0 m. The piles are 9 m long and are embedded in soft clay with cohesion 30 kN/m 2 . Bearing r
Exponential distribution - Poisson distribution function: Let X follow exponential distribution with parameter θ. Find the pdf of Y = X 1/β where β( ≥ 1 ) is a constant.
Q- What is the difference between painting, polishing and varnishing as for as woodwork is concerned? What are their advantages and disadvantage? Ans. - Painting - P
Univariate normal distribution: Let X = (X I , X 2 , ..., X n ,) has the multivariate normal distribution (5.26) of Section 5.4. Show that Y = a X ' follows a univariate norma
Most of the existing rubber dams are of air-filled types. Water-filled rubber dams aren't preferred for the below reasons: (i) By giving same sheet length and dam height, tensi
A cylindrical specimen of saturated clay, 4.5 cm in diameter, and 9 cm long, is tested in an unconfined compression apparatus. Search the cohesion if the specimen fails at an ax
Drainage of Embankment Slopes: Slopes of high embankments get eroded by rain water. Deep rain cuts are formed, which endanger the pavement. In such cases, it is customary to
Define the Rectangular Weirs Sometimes referred to as "sharp crested weirs" if the top edge of the weir plate is narrow
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