Problem-1 The BEPZA authority decides to conduct a field compaction test by their own facilities. They already bought Ottawa sand, which is necessary for the field compaction test. However, the density is to be determined prior to its application, and hence, sand samples were sent to the geotechnical laboratory of CUET for the determination of density. The concerned staff of the laboratory has recorded the necessary data required for the determination of the density of the supplied soils, which is given in the following table: Trial Wt. of mould + dry soil (gm) Remarks 1 13471 Wt. of mould (gm) = 10028.00 Dia of mould (cm)=16.3, 16.3, 16.3 2 13465 3 13472 Height of mould (cm)=10.2, 10.2, 10.2 Determine the bulk and dry density of supplied Ottawa sand. Also, determine the void ratio of the soils.

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Asphalt Binders and Mixtures

Asphalt binders are subsidiary products procured during the refining process of petroleum while manufacturing gasoline, diesel, and similar petroleum products. Asphalt binders are obtained from the residue that remains after the distillation of petroleum, this residue is further subjected to steam distillation and oxidation to remove the traces of gas oil present in the residue. Certain additives or modifiers are also added to asphalt binders to alter them to suit different applications.