In-situ evaluation of design parameters and procedures for cementitiously treated weak subgrades using cyclic plate load tests : project capsule.
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2013-06-01
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;
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Abstract:Due to the soft nature of subsurface soils in southern Louisiana, roads often have to
be constructed on very weak subgrade soils with high in-situ moisture contents that
do not have the suffi cient strength/stiff ness to support the construction/traffi c loads,
which pose a signifi cant challenge for construction of highway projects. To solve such a
challenge, cementitious additives such as cement, lime, fl y ash, cement kiln dust (CKD),
and slag, alone or in combination can be used to treat/stabilize these soils to improve
their engineering properties such as strength and stiff ness, thus providing the needed
support for pavement construction. The long-term performance of treated/stabilized
soils is usually infl uenced by the type and characteristics of the parent subgrade soil, the
type and quantity of stabilization additive, the construction practices, the frequency and
magnitude of loading, and the environmental conditions.
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