👉Max of MDD and OMC?
🏷The relationship between maximum moisture content and maximum dry density of embankment soil is explained through the Compaction Curve, which is determined by the Proctor Test (Standard or Modified Proctor Test).
⭐️The key aspects of this relationship are:
1. Parabolic Relationship:
When soil is compacted at different moisture contents, the dry density first increases, reaches a peak (maximum dry density) at an optimum moisture content (OMC), and then decreases as moisture content continues to rise.
2. Optimum Moisture Content (OMC) & Maximum Dry Density:
The maximum dry density (MDD) occurs at an optimum moisture content (OMC), which is the water content at which soil particles are best packed.
If moisture is less than OMC, soil particles cannot fully rearrange, leading to lower density.
If moisture is more than OMC, excess water displaces soil particles and reduces density due to water occupying pore spaces.
3. Soil Type Effect:
Coarse-grained soils (sands, gravels): Have higher MDD and lower OMC.
Fine-grained soils (clay, silt): Have lower MDD and higher OMC because they retain more water due to high cohesion.
4. Field Application for Embankment Construction:
Proper compaction control ensures embankments achieve maximum stability.
Moisture control is essential—too dry leads to poor compaction, too wet leads to low strength.
Compaction equipment (rollers) and method (layer thickness, number of passes) impact final density.
In summary, MDD and moisture content have an inverse relationship beyond OMC, meaning too much or too little moisture reduces density. The goal in embankment construction is to compact soil near OMC to achieve MDD for stability and load-bearing capacity.
@etconp
🏷The relationship between maximum moisture content and maximum dry density of embankment soil is explained through the Compaction Curve, which is determined by the Proctor Test (Standard or Modified Proctor Test).
⭐️The key aspects of this relationship are:
1. Parabolic Relationship:
When soil is compacted at different moisture contents, the dry density first increases, reaches a peak (maximum dry density) at an optimum moisture content (OMC), and then decreases as moisture content continues to rise.
2. Optimum Moisture Content (OMC) & Maximum Dry Density:
The maximum dry density (MDD) occurs at an optimum moisture content (OMC), which is the water content at which soil particles are best packed.
If moisture is less than OMC, soil particles cannot fully rearrange, leading to lower density.
If moisture is more than OMC, excess water displaces soil particles and reduces density due to water occupying pore spaces.
3. Soil Type Effect:
Coarse-grained soils (sands, gravels): Have higher MDD and lower OMC.
Fine-grained soils (clay, silt): Have lower MDD and higher OMC because they retain more water due to high cohesion.
4. Field Application for Embankment Construction:
Proper compaction control ensures embankments achieve maximum stability.
Moisture control is essential—too dry leads to poor compaction, too wet leads to low strength.
Compaction equipment (rollers) and method (layer thickness, number of passes) impact final density.
In summary, MDD and moisture content have an inverse relationship beyond OMC, meaning too much or too little moisture reduces density. The goal in embankment construction is to compact soil near OMC to achieve MDD for stability and load-bearing capacity.
@etconp