CPEM Chapter 5--Compaction & Stabilization Equipment

CPEM Chapter 5--Compaction & Stabilization...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
1 INSTRUCTOR: DUSTIN OLSON, MBA CM 335 Construction Planning, Equipment, and Methods—Chapter 5 1912 Case steam roller COMPACTION ROLLERS COMPACTION The engineering properties of most soils can be improved by compaction. Compaction is the art of mechanically densifying materials.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 COMPACTION v Load bearing capacity The engineering properties improved by compaction. v Control of shrinkage and swelling v Reduced permeability COMPACTION Soil gradation The three major factors influencing soil density are: Moisture content Compactive effort 123.5 Must work in the box. COMPACTION The amount of water present in a soil mass affects the compaction operations and achievable soil density. Disking to dry the soil.
Background image of page 2
3 using the COMPACTION The most common methods of reducing soil moisture are by using the scarifying teeth on a grader or by disking. COMPACTION May have to add water. ADDING WATER Normally, it is good practice to adjust water content to OMC = 2%. But this depends on wind, temperature, and soil type. The OMC is ______? The Maximum dry density is ______?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 COMPACTION OMC is 15% COMPACTION Maximum dry density 120 COMPACTION Lift. A layer of soil placed on top of soil previously placed in an embankment. The term can be used in reference to material as spread or as compacted. COMPACTION
Background image of page 4
5 SOIL TYPES NON-COHESIVE SMALL GRAINED < #200 MESH SIEVE COHESIVE COMPACTION Effective roller capability soil ranges . COMPACTION Densification is accomplished by : Ø Static weight (pressure) Ø Impact (sharp blow) COMPACTION Ø Vibration (shaking) Densification is accomplished by : Ø Kneading (manipulation)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 STATIC WEIGHT TAMPING FOOT COMPACTOR Static weight & Kneading Leveling blade PAD CONFIGURATION Tamping foot Pad foot TAMPING FOOT COMPACTOR It is suitable for compacting all fined-grained soils , but is generally not suitable for use on cohesionless granular soils.
Background image of page 6
7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/07/2012 for the course CM 335 taught by Professor Staff during the Fall '08 term at BYU.

Page1 / 19

CPEM Chapter 5--Compaction &amp;amp; Stabilization...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online