232LIME STABILIZED ROADBED

150

points below optimum and 3.0 percentage points above optimum of the laboratory specified optimum moisture content. If compaction cannot be completed in the same day started, the surface shall be sealed by rolling with a rubber-tired or non-vibratory smooth drum roller before suspending that day’s operation and the compaction continued the following day. If compaction cannot be obtained within the 72-hour limit noted in this Subarticle, the section involved shall be reprocessed by adding 25 % additional lime, based on the percentage of lime added prior, but not less than 1 percent, and the compaction operation restarted, all of which shall be at the sole expense of the Contractor. Throughout the entire compaction operation, depressions, defective areas, or soft spots which develop shall be corrected immediately by scarifying the area, adding lime when required, or removing the material and reshaping and compacting in accordance with these specifications at the expense of the Contractor.

The surface of the layer shall be smooth and conform to the lines, grades, and cross sections shown on the plans or established by the Engineer. Surface requirements shall be as specified in Subarticle

230.03(e)

The thickness of the lime stabilized layer will be determined from measurements taken at intervals not to exceed 200 feet {60 m} for projects less than one mile in length and taken at intervals not to exceed 500 feet {150 m} for projects greater than one mile in length. The thickness of the entire layer(s) shall not vary more than 3 inches {75 mm} plus or minus from that shown on the plans. Any section deficient by more than 3 inches {75 mm} shall be reconstructed immediately in accordance with these specifications. Any section exceeding the 3 inch {75 mm} tolerance shall have additional lime added to correct the deficiency and shall be remixed to the specified depth and width in accordance with these specifications. In each case, such reconstruction and additional lime added shall be at the sole expense of the Contractor.

Upon completion of the compaction and finishing of each layer, no vehicles or equipment other than watering equipment shall be permitted on the finished layer for the number of days listed here, unless otherwise authorized or stated herein. Minimum Curing Requirements Untreated Material Min. Curing Days (March 16th – November 30th) Min. Curing Days (December 1st – March 15th) PI ≤ 20 2 3 PI > 20 and PI < 35 4 5 PI ≥ 35 7 7

Proof rolling may be substituted as an indicator of adequate curing, subject to the Engineer’s approval. For sections that impact local traffic, completed sections of the lime-treated soil may be opened earlier to lightweight local traffic by demonstrating that the treated sections have hardened sufficiently to prevent marring or distorting the surface. Under such circumstances, the Contractor will ensure curing is not otherwise impaired. Throughout the cure period, the surface of the treated section shall be kept moist. It shall be the Contractor's responsibility to provide sufficient water and equipment to maintain a moist surface of all partially constructed or completed lime stabilized layers until a succeeding layer has been placed thereon or until final acceptance of the project. The Contractor may, on a layer to be covered by a conventional base or subbase layer, substitute at his expense an acceptable prime coat in lieu of watering during the curing period noted above. If the prime coat will be exposed to local traffic, it shall be thinly covered with an ALDOT No. 8, per The Contractor shall be responsible for the protection and maintenance of the treated layer until it is covered by another layer or the completion of the project. Any damage to the treated layer due to other phases of construction or any cracking or other defects that may occur due to any cause or reason before being covered by the next layer shall be repaired without additional compensation. An alternate repair method may be used if approved in writing. DETOUR BRIDGES 151

232.04Method of Measurement

The actual area of the roadbed stabilized as ordered, for each specified compacted depth, completed to the thickness and cross-section shown on the plans or directed, will be measured in square yards {square meters}. All calculations of areas measured for payment shall be based on measurements made to the nearest 0.1 yard {0.1 meter} with areas calculated to the nearest square yard {square meter}. The length will be measured along the surface of the completed roadbed at its center point. The width will be the top surface width of the completed roadbed specified on the plans or directed, measured perpendicular to the center line of roadbed. Additional areas required for crossovers, turnouts, etc., shall be measured by length and width along the surface of area processed. Lime actually incorporated in the work will be measured by the ton {metric ton}. In cases where Pure Quicklime (CaO) is slaked on the jobsite to produce a lime slurry, the pay quantity for lime will be measured in tons {metric tons} of hydrated lime as calculated using the certified lime purity for each truckload as follows: TOTAL TONS {METRIC TONS} HYDRATED LIME PRODUCED = (A x B x 1.32) + A (1.0 - B) Where: A = tons {metric tons} of Quicklime delivered B = certified percent purity Note: 1.32 = ratio of Molecular weights {masses} for Hydrated Lime (74) and Pure Quicklime (56)

232.05Basis of Payment

The ordered and accepted area of lime stabilization, measured as noted above, will be paid for at the contract unit price bid per square yard {square meter} of the class and depth specified. Said unit price bid shall be full compensation for all scarifying, pulverizing, mixing, shaping, watering, compacting, and application of lime and for all equipment, tools, labor, and incidentals necessary to complete and maintain the work. The accepted quantity of lime actually incorporated in the work except as noted herein, measured as provided above, will be paid for at the contract unit price per ton {metric ton} for lime, which price shall be payment in full for furnishing, transporting, storing, handling, preparation of slurry, and spreading; and for all equipment, tools, labor, and incidentals needed for completion of the work. Any additional soil material required to bring the roadbed to plan grade and section, and any unsuitable material excavated, will be measured and paid for under the appropriate item of Unclassified Excavation or Borrow. No direct payment will be made for blading, shaping, compacting, and like operations.

232-A Lime Stabilization, Class ____, ___ inches {mm} Thick - per square yard {square meter} 232-B Lime - per ton {metric ton} DETOUR BRIDGES

235.01Description

The work under this Section shall cover the work of furnishing all materials, construction, maintenance, and removal (unless otherwise directed) of any temporary detour bridge structure at the approximate location shown on the plans or directed.

235.02Materials

All timber used shall be a minimum of dense No. 1 structure grade pine or equivalent grade of other wood. Steel or other types of bridging material may be used; however, the grade of material used must be approved by the Bridge Engineer. Other materials shall conform to the requirements noted elsewhere in these Specifications for the type of material used.

235.03Construction Requirements

The alignment, length of bridge, grade, and typical cross section will be shown on the plans.