What is the maximum dry unit weight to which this soil can be compacted without change in its moisture content?
From this figure the maximum dry unit weight is approximately 16.6 kN/m3. The corresponding optimum moisture content is 20%.
How do you calculate maximum dry unit weight of soil?
The maximum dry unit weight is determined using laboratory method for the standard proctor test. From the results obtained in this test, the compaction curve is drawn. The compaction curve is drawn using water content in x axis expressed in percentage versus dry unit weight of compacted soil plotted in y axis.
What is the dry unit weight?
Dry unit weight, which is the unit weight of a soil when all void spaces of the soil are completely filled with air, with no water.
What is effective unit weight?
The unit weight of a soil that, when multiplied by the height of the overlying column of soil, yields the effective pressure due to the weight of the overburden.
What is G in soil mechanics?
In soil mechanics, the specific gravity of soil solids (which is often referred to as the specific gravity of soil) is an important parameter for calculation of the weight-volume relationship. Thus specific gravity, Gs, is defined as. Gs = unit weight (or density) of soil solids only / unit weight (or density) or water.
What are the types of water flow in the soil?
Generally three types of water movement within the soil are recognized –saturated flow, unsaturated flow and water vapour flow (Fig. 23.1). Water in the liquid phase moves through the water filled pores within the soil (saturated condition) under the influence of gravitational force.Esfand 24, 1392 AP
What are the different types of soil unit weight?
Several unit weights are used in Soil Mechanics. These are the bulk, saturated, dry, and submerged unit weights.
What is the mass of soil?
The soil bulk density (BD), also known as dry bulk density, is the weight of dry soil (Msolids) divided by the total soil volume (Vsoil). The total soil volume is the combined volume of solids and pores which may contain air (Vair) or water (Vwater), or both (figure 1).
What is soil toughness index?
Toughness Index (It) It is ratio of Plasticity Index and Flow Index of a soil sample. This gives us an idea of shear strength of soil at its plastic limit. When toughness index is less than 1, the soil is said to be friable, which means it can be easily crushed at plastic limit.Ordibehesht 19, 1390 AP
What is sensitivity of soil?
Soil sensitivity is defined as the ratio of the undrained shear strength of undisturbed soil to the undrained shear strength of remoulded soil at the same water content, i.e. Soil sensitivity is an important measure of the loss of strength and structure in the soil body under the effect of static or seismic loading.
What is soil flow index?
The flow index (FI), which is the slope of the water content versus log10 of the blows number plot for the Casagrande cup method, is the measure of the rate at which soil mass loses its shear strength with increased water content.
What is a flow index?
Flow index is a measure of the rate at which a soil mass loses its shear strength with an increase in the water content.
What is soil index properties?
Soil index properties are properties which facilitate identification and classification of soils for engineering purposes. Plastic soils (clays) are normally described as cohesive as a distinction from non-plastic soils (sands and gravels) which are often called granular or non-cohesive.
What is the consistency index?
Consistency Index (CI)- This is a measure of how well an individual character fits on a phylogenetic tree. It is calculated by dividing the minimum possible number of steps by the observed number of steps.
What is consistency ratio?
A true Consistency Ratio is calculated by dividing the Consistency Index for the set of judgments by the Index for the corresponding random matrix. Saaty suggests that if that ratio exceeds 0.1 the set of judgments may be too inconsistent to be reliable.
How do you calculate random consistency index?
With a consistency index CI = (LAMDAmax -n)/(n-1) we calculate the consistency ratio CR=CI/RI where RI is a random index (consistency index for the n row matrixes of randomly generated comparisons in pairs – a table with calculated values applies.
What is flow behavior?
The flow behavior index (n) indicates the degree of non-Newtonian characteristics of the fluid. As the fluid becomes more viscous, the consistency factors (k) increases; as a fluid becomes more shear thinning “n” decreases. For drilling fluids, this is a desirable property and most drilling fluids are pseudoplastics.
What does rheology mean?
Rheology is the scientific field that encompasses the flow phenomena of matter (solids, liquids, and gases) and notably involves time-dependent behavior under the influence of stresses. From: Orthodontic Applications of Biomaterials, 2017.