Transportationengineering2012onwards.blogspot.com Website Review

notes are provided for transportation engineering, surveying, structure mechanics, soil mechanics, civil engineering materials and this problem deals with the sand cone test used to determine the density of the compacted soil. problem: a sand cone density test was conducted on a soil compaction at a land development project. it has the following data: mas* of the sand to fill the cone = 0.53 lbs mas* of the soil dug from the hole = 8.11 lbs (and have water content mas* of jug + sand + cone before used to fill the hole = 10.20 lbs mas* of jug+ sand cone after used = 3.20 lbs determine: (a) the density of the ottawa sand(pcf)                     (b) the volume of the cone (cubic feet)                     (c) the volume of the hole dug  + cone (cubic ft)                     (d)  the volume of the hole dug                     (e)  the dry density of the compacted sediments that are dredged from the water bodies such as reservoir, lakes or oceans are weak in strength and highly compressible, in general. this is nothing more than a waste material. however, it can be treated with certain chemicals such as the bentonite and opc(ordinary portland cement) to give it the desired properties of a fill material in back-fills.  it is found that the opc acts as the binder and provides the strength, while the bentonite provides the volume and also the strength to the clay. therefore this treated soil can then be used as the fill, or also it can be used to form the dikes or trenches above. solved example of pinned truss - the average normal and shear stresses in members and pins respectively and pin diamater. a simple truss has pin-connected members. the members carry only axial forces, but the pins have to bear the shear stresses. given example shows the calculation for the minimum required diameter of pin connected in double shear. problem: two structural members ab and bc (shown below) are connected by a pin at b that is subjected to two 5-kip horizontal forces. the