Establishing Porosity and Bulk Density Analysis Effect on Foundation and Fexible Pavement in Heterogeneous Sand and Silty Formation

It has been observed that anisotropic nature of rocks is assumed to be caused by disparity in their petrography (mineralogy, texture and micro-structures) including physical properties. These variations have been revealed to occur even in locations where there are only a few centimetres apart on most outcrops. Furthermore, comparable rock types in most localities may not yield the same engineering properties and therefore may not be appropriate for the same use. This condition has express in confirmatory tests on rocks that require lots of test samples and are therefore very expensive, time consuming and tedious [1,2]. Bulk density and porosity are two of the physical properties that have been observed to be imperative parameters that affect the mechanical properties, particularly Uniaxial Compressive Strength (UCS), base on the factors it is noted to affect the depositions of crystalline rocks. Slight variations in these parameters, particularly porosity, have been discovered to correspond to significant variations in UCS [3-6]. Studies has express that Porosity of a crystalline rock is the sum of microfractures, intra-granular pores and fluid inclusions [7-10]. Base on these facts Researchers were observed to take porosity of crystalline rocks for granted, by not testing for it, these were note for the facts that the result are normally extremely low values, whereas a slight disparity in this parameters can lead to important variation in UCS which can cause serious disruption of engineering designs. The establishments of a relationship between the two significant parameters of bulk density and porosity have definitely provided a way out of the likely impasse. This condition may always may also lead to a reduction in the cost and time required to test for them during investigation as the bulk density (which is an necessary test parameter) can be used to approximate the porosity of the rock. Moreso, such assessments make it possible to identify areas that require further survey, as well as to demarcate those that could possibly cause a future failure of engineering structures. The rocks of this complex have been variously classified by [2,5-9,11] classified the rocks as (a) the gneiss-migmatite-quartzite complex; (b) the schist belts which are low to medium grade supracrustal and meta-igneous rocks; (c) the Pan African granitoids (Older Granites) and other related rocks such as charnockitic rocks and syenites; and (d) minor felsic and mafic intrusive