Section 304 Section 304 Payment will be made under: 304-A: Granular Material, LVM, Class____, Group____ - per cubic yard 304-B: Granular Material, Class____, Group____ - per ton 304-C: Granular Material, AEA, Class____, Group____ - per cubic yard 304-D: Granular Material, Size - per ton 304-E: Granular Material, LVM, Size - per cubic yard 304-F: Size Crushed Stone Base - per ton 304-G: Size Crushed Stone Base, AEA - per cubic yard 304-H: Size Crushed Stone Base, LVM - per cubic yard SECTION 305 - IN-GRADE MODIFICATION
305.01 Description . This work consists of modifying in place materials by
incorporating other materials and constructing one or more courses in accordance with these specifications and in reasonably close co nformity with the lines, grades, and typical cross sections shown on the plans or established by the Engineer.
305.02 Materials .
305.02.1 Materials to be Modified . The materials to be modified shall consist of
material in place on the roadbed or material placed under this contract or a combination thereof. General conditions governing the use of materials shall be as set out in Section 106.
305.02.2 Stabilizer Aggregates . Stabilizer aggregates of the kind and size specified
shall meet the requirements of Subsection 703.20.
305.03 Construction Requirements.
305.03.1 Equipment . The methods and equipment used in performing the work shall
meet the requirements of Subsection l08.05 . Equipment necessary for proper prosecution of the work shall be on the project and approved by the Engineer prior to commencing work. Watering equipment shall have pressurized spray bars with suita ble nozzle openings. Mixing and scarifying equipment shall have positive depth controls. Rollers shall be of sufficient number, type , size, and weight to accomplish the required compaction. When measurement for payment for stabilizer ag gregate is to be made by the ton, the Contractor shall furnish approved platform s cales capable of weighing the entire loaded vehicle. Scales and their use shall be in accordance with the requirements set out in Subsection 40l.03.2.1.11, except they shall be installed at an approved location on or near the project.
305.03.2 Processing.
305.03.2 1--Before Addition of Stabilizer Aggregate. The material to be modified shall
be prepared in accordance with the requirements of Section 321. In addition, if the existing surface consists of bituminous surfacing, the surfacing shall be scarified, pulverized, and thoroughly mixed until all the ma terial will pass a three-inch sieve. The material shall then be brought to the designated lines, grades, and cross sections and to the required density. To ensure proper prosecution of the work, sufficient roadbed shall be prepared in advance of spreading stabilizer aggregate.
305.03.2 2--After Addition of Stabilizer Aggregate . After the roadbed and in-place
material have been prepared as specified and approved, the designated quantity of aggregate to be added sh all be uniformly spread. The Contractor shall organize the work so that delay in spreading and incorporation of aggregate will be only for the time necessary to haul the re quired quantity of stabilizer materials on a section of sufficient length to permit a single effective spreading, mixing, shaping, and compacting operation. Dumping of long lines of stab ilizer aggregates on the roadbed and prolonged periods of hauling adjacent thereto will not be permitted. Unless wet soil conditions prevent satisfact ory manipulation, aggregates shall be incorporated not later than the following day. Preliminary scarifying shall be carefully controlled, and the undisturbed foundation beneath the loose material shall have a crown conforming as nearly as practicable to that of the finished course. Mixing shall immediately follow the proper distribution of the aggregate and shall be performed with rotary or other agitating type mixers, supplemented by other equipment as necessary to pulverize the materials and th oroughly incorporate each into the other so that the resulting course will be uniform throughout. During mixing, sufficient water shall be added to bring the material to the proper moisture content. Mixing shall be carefully controlled to provide an undisturbed underlying foundation at the designed grade and cross section, and shall be continued until a minimum of 95.0 percent of all materials, exclusive of indivi dual rocks or stone, will pass a two-inch sieve. The first section of each modified course constructed will serve as a test section. The length of the test section shall be determined by the capabilities of the equipment selected to perform the work but will be at least 1000 feet and not more than 1500 feet for the designated width. The Contractor and Engineer will evaluate the results of the test section in relation to contract requirements. In case the Engineer determines the work does not comply with contract requirements, the Contractor’s procedure and augment or equipment shall be revise as necessary to provide work completed in accordance with the contract and shall correct all deficient work at no additional cost to the State. The Contractor shall be fully responsible for damage to or contamination of the underlying material or shoulder material a nd shall make corrections as necessary at no additional cost to the State. For the purpose of determining reasonable co nformity with the designated width of a course, the width of a course shall not vary from the designated edge lines by more than plus or minus three inches. A course whose compacted thickness is designate d to be more than eight inches shall be constructed in two or more layers of ap proximately equal thickness. The maximum compacted thickness of any one laye r shall not exceed eight inches. No material shall be placed on or mixed with frozen material.
305.03.3 Shaping, Compacting and Finishing . Compaction shall start longitudinally
at the outer edges of the course and proceed toward the center. The material shall be sprinkled or aerated as necessary during compaction to maintain the needed moisture content for compaction. Shaping and compacting shall be carried out in a manner that will prevent lamination and shall continue until the entire depth and widt h of the course has reached the required density. Throughout the entire compaction op eration, the shape of the course shall be maintained by blading and rolling. Surface compaction and finishin g shall be performed so as to produce a smooth, closely knit surface, free from lamination, cracks, ridges, or loose material, and conforming to the required section and established lines and grades. Prior to subsequent construction or release of maintenance, all irregularities, depressions, soft spots, and other deficiencies shall be corrected to meet the requirements of these specifications without additional compensation. Density tests will be performed in accordance with the methods as provided in Subsection 700.03 and 700.04. Determination of acceptance of compaction of in-grade modification for required density will be performed on a lot to lot basis. Each lot will be 2,500 linear feet per layer placed. At the discretion of the Engineer, a residual portion of a lot completed during a day's operation may be considered as a separate lot or may be included in the previous or the subsequent lot, except that any day's operation of less than one full lot will be considered a lot. The lot will be divided into five approximately equal sublots with one density test taken at random in each sublot. The average of th e five density tests shall equal or exceed 93.0 percent with no single density test below 89.0 percent. In addition to the requirements for density a nd correction of deficiencies, the Contractor shall be fully responsible for constructing and maintaining a course which will remain firm and stable under constr uction equipment and other traffic the course will be subjected to prior to release of maintenance. The finished surface of a course shall confor m to the requirements shown on the plans within the tolerances allowable under Section 321 and shall be maintained until covered by a subsequent course or the work is released from maintenance.
305.04 Method of Measurement . Processing for in-grade modification will be
measured by the square yard, st ation, or mile, as designated. Stabilizer aggregates of the type or size specified will be measured by the cubic yard (LVM) or by the ton, as indicated in the bi d schedule of the contract. No measurement for payment for water will be made. When the method of measurement is by the ton, measurement will be made on the dry unit weight basis at the point of weighing. The moisture determination for computing the dry unit weight will be made in accordance w ith the methods set out in Subsection 700.03 at least once a day, and as many additional times as the Engineer deems necessary.
305.05 Basis of Payment . Processing for in-grade modification will be paid for at the
contract unit price per unit specified. Stabilizer aggregate will be paid for at the contract unit price per unit specified, which price shall be full compensation for completing the work. Payment will be made under: 305-A: Processing for In-Grade Modification - per square yard, station, or mile 305-B: Size __ Stabilizer Aggregate, Coarse - per cubic yard or ton 305-C: Stabilizer Aggr egate, Shell - per cubic yard or ton 305-D: Stabilizer Aggregate, Me dium - per cubic yard or ton 305-E: Stabilizer Aggregate, Fi ne - per cubic yard or ton SECTION 307 - LIME TREATED COURSES
307.01 Description . This work consists of constructing one or more courses of a
mixture of soil, hydrated lime and water, or a mixture of soil and hydrated lime slurry in accordance with these specifications and in r easonably close confor mity with the lines, grades, thicknesses, and typical cross sections shown on the plans or established by the Engineer. When lime slurry is used the Contractor shall mix hydrated lime with water to produce lime slurry or, at the Contractor’s option, produce lime slurry at the job site by the use of equipment specifically manufact ured for the slaking of quick lime. The use of quick lime by the dry applicatio n method will not be allowed unless the lime meets the requirements of Subsection 714.03.3.2 for Dry Quick Lime. The work shall include preparation of the roadbed, incorporation of lime or lime slurry, and processing to the proper grade, secti on and density in accord ance with one of the following methods: