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1 why are plasticizing admixtures called water reducing what is the distinction between normal and high-range
1 after reviewing the astm c 618 and c 989 standard specifications and other published literature write a critical note
1 when added to portland cement paste in very small amounts calcium chloride acts as a retarder but in large amounts it
1 discuss the mechanisms by which mineral admixtures improve the durability of concrete to acidic waters why is that
1 theoretically derived ideal gradings of aggregates for maximum density should be the most economical yet the practice
1 describe the significance of workability of concrete and the factors affecting the property2 according to the aci
with respect to the aci 2111 standard practice for selecting proportions for normal heavy-height and mass concrete
1 briefly state the influence of maximum aggregate size ie 19 mm vs 38 mm on the mixing water content and the cement
1 list four nondestructive test method for the evaluation of concrete quality which one can be used as a direct
1 explain the maturity concept its application and its limitations2 describe the difference between longitudinal and
in sec 62 we developed an eq 11-19 to determine the thickness of a lowvelocity horizontal layer derive a similar
a in high-rise buildings what are the advantages of constructing shear walls and columns with high-strength concreteb
1 what is the significance of super plasticized flowing concrete to the construction industry what changes may have to
1 explain how the impact method can determine the thickness of delamination in a concrete pavement2 devise a scheme to
1 explain why the determination of the corrosion rate in reinforced concrete is a critical parameter in all modern
a for a concrete mixture containing 370 kg of cement 1830 kg of aggregate ssd condition and 190 kg of mixing water
1 in the aci 306r recommended practice for cold-weather concreting explain why higher than ambient concrete
1 with the help of suitable curves show how accelerating and retarding admixtures affect the setting time of a concrete
why may the setting time of concrete be substantially different from the setting time of the cement from which the
what are harmful manifestations of plastic shrinkage of concrete ina reinforced columns andb slabsassuming that the air
1 define the following phenomena and give their significance and the factors affecting them slump loss segregation and
1 explain the two important objects of curing and how they are achieved ina coldweather concreting andb hot-weather
1 explain the operations covered by the following terms and discuss the significance of these operations retempering
electron control inc sells voltage regulators to other manufacturers who then customize and distribute the products to
the k ticket agency offers opera tickets for sale at a price of 40 per ticket jessica orders 5 tickets and promises to