Classification of A-2 soilUse plasticity chart to determine whether thesoil is A-2-4, A-2-5, A-2-6 or A-2-721August31,2025TUDelft
August 31, 2025 21 Classification of A-2 soil • Use plasticity chart to determine whether the soil is A-2-4, A-2-5, A-2-6 or A-2-7
AASHTO plasticity chart70A7A6PI [%]10A4A5040100LL [%]22August31,2025TUDelft
August 31, 2025 22 AASHTO plasticity chart PI [%] 70 10 0 40 LL [%] 100 A 6 A 7 A 4 A 5
Classificationof finegrainedsoilsUse plasticity chartto determine whether soil isan A-4, A-5, A-6 or A-7 soil If soil hashighLLfurtherclassificationcanbedone using Group Index (GI),23August31,2025TUDelft
August 31, 2025 23 Classification of fine grained soils • Use plasticity chart to determine whether soil is an A-4, A-5, A-6 or A-7 soil • If soil has high LL further classification can be done using Group Index (GI)
Influencefactors onmechanicalcharacteristicsType of material.Gradation.Plasticitycharacteristics.Moisture content Drainage.COMPACTION!!August31,202524TUDelft
August 31, 2025 24 Influence factors on mechanical characteristics • Type of material. • Gradation. • Plasticity characteristics. • Moisture content. • Drainage. • COMPACTION !!
If thesefactors are notwell takeninto acountthen .......25August31,2025元TUDelft
August 31, 2025 25 If these factors are not well taken into acount then