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Inverted Pavements Project: CSSTP-008-00(292)01 Troup County “South LaGrange Loop” Georgia Construction Aggregates Associations 2009 Management Workshops.

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Presentation on theme: "Inverted Pavements Project: CSSTP-008-00(292)01 Troup County “South LaGrange Loop” Georgia Construction Aggregates Associations 2009 Management Workshops."— Presentation transcript:

1 Inverted Pavements Project: CSSTP (292)01 Troup County “South LaGrange Loop” Georgia Construction Aggregates Associations 2009 Management Workshops "Going Green While Saving Green" Grant Eager, PG Quality Assurance Manager Georgia Aggregates Lafarge North America

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3 Inverted Pavement Portland Cement Concrete “Test Section” “Typical Section” Typical Sections 6- inch stabilized Subgrade 10-inches GAB10-inches CTB 6-inches GAB-Special9.5-inches PCC

4 6.0 inch - Subgrade Meeting a minimum Soil Support Value of 5 Stabilized Subgrade MaterialSection Class IIB4 or Better Soil A.1 MaterialSection Type II Stabilizer Aggregate General Description This Work shall consist of constructing a stabilized subgrade course yielding a Soil Support Value (SSV) of 5.0 or greater in the top 6 in (150 mm) of the Plan-indicated thickness of the roadbed in both excavation and embankment areas. Also includes incorporating an aggregate stabilizer material uniformly throughout the subbase course in accordance to these Specifications and conforming to the lines, grades, and typical sections shown on the plans.

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10 10.0 inches -Cement-Treated Base Meeting a minimum Unconfined Compressive Strength of 300 PSI Cement-Treated Base General Description This Work includes constructing a pre-mixed, cement-treated base course composed of graded aggregate, Portland cement and water proportioned, uniformly blended, placed, compacted, and cured in accordance with these Specifications. This Work shall conform to the lines, grades, thickness, and typical cross-sections shown in the Plans or established by the Engineer. MaterialSection Graded Aggregate (Group I or Group II) Both Group I and Group II Graded Aggregate must meet the Soundness requirement of Section Cutback asphalt, RC-30, RC-70, RC-250 or MC-30, MC-70, MC Portland Cement (Type I or Type II) Water

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15 6.0 inches – Graded Aggregate Base Compaction to 86% of Apparent Gravity Graded Aggregate Base General Description This Work includes constructing a base course composed of mineral aggregates, constructed in accordance to these Specifications and to the lines, grades, thickness, and typical cross- section shown on the Plans or established by the Engineer. In lieu of traditional compaction requirements, the Graded Aggregate Base must be compacted to at least 86% of Apparent Density as established by the GDT23 test method to be accepted. MaterialSection Graded aggregate Cutback asphalt, RC-30, RC-70, RC-250 or MC-30, MC-70, MC Cutback Asphalt Emulsion, CBAE Blotter material (sand) G.3

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20 1.5 inches – 12.5 mm Superpave 2.0 inches – 19.0 mm Superpave 6.0 inches – Graded Aggregate Base Compaction to 86% of Apparent Gravity 10.0 inches -Cement-Treated Base Meeting a minimum Unconfined Compressive Strength of 300 PSI 6.0 inch - Subgrade Meeting a minimum Soil Support Value of 5 Pavement Surface 1.5 inches (12.5 mm) Superpave

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22 Inverted Pavements Project: CSSTP (292)01 Troup County “South LaGrange Loop” Georgia Construction Aggregates Associations 2009 Management Workshops "Going Green While Saving Green"


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