214FINE GRADING

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This work shall consist of the final grading necessary to make the subgrade, the area under the surface course, the roadway

outside the surface course, and other locations as directed by the Engineer conform to the lines shown on the plans or established by the Engineer. Construction Requirements

3.1The surface of each course of material shall be fine graded to conform to the typical section of the plans prior to placing the

succeeding course. Each course shall be fine graded to conform to the lines and grades as shown on the plans. When fine grading to a specific slope prior to paving, the slope tolerance will be +/-0.2%. 3.1.1 Cross slope to b e measured by the following method: Measurements will be taken by placing a 10 -foot metal straight edge on the surface perpendicular to the traveled lane. A 4 -foot direct reading level shall be placed on top of it. Percent cross slope shall be read and recorded. A second reading 180 degrees to the first shall be taken and recorded and the two shall be averaged for the test result. 3.1.2 The use of automated grade and slope control will be required on all graders. 3.1.3 On projects or parts of projects where the Engineer deems that the use of automatic controls are impracticable, some or all of the controls in 3.1.2 may be waived.

3.2Shoulders, slopes, and ditches shall be shaped with suitable machinery supplemented by hand labor to reasonably smooth

surfaces that are in keeping with the character of the adjacent terrain and shall merge into the adjacent terrain without any noticeable break. Culverts and waterways shall be cleared of all obstructions. Rubbish, brush, loose rock, boulders, and all other debris from the construction work shall be removed and disposed of as directed.

3.3To be acceptable under this item, the entire roadway must present a uniformly finished appearance at the completion of the

work. 3.3.1 The Contractor shall give 24 hour not ice of the expected completion of the final fine grading prior to paving, to allow inspection by the Engineer. Method of Measurement

4.1Fine grading, except as specified in 4.2, will be measured as a unit. If the project is altered to require substantial changes in

the length, width, or character of the fine grading from such length, width, or character shown on the plans, the Contract Unit price will be subject to a negotiated revision.

4.2Fine grading of earth berms constructed in rock cuts will be m easured by the linear foot to the near est 1 -foot along the

adjacent ditch line. Basis of Payment

5.1The accepted quantities will be paid for at the Contract Unit price for fine grading not otherwise classified and per linear foot

for fine grading earth berms constructed in rock cuts.

5.2When no quantity for this item is included in the Contract, this work will be subsidiary.

Pay items and units: 214. Fine Grading Unit

214.3Fine Grading Earth Berms in Rock Cuts Linear Foot

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of furnishing and placing base courses on a previously prepared subgrade or course as shown on the

plans or as ordered.

1.2This work shall also include raising the grade of the edge of the roadway shoulders with crushed aggregate as shown on the

plans or as ordered to match the grade of the pavement course placed on the shoulders or to provide a base for shoulder pavement. Materials

2.1General.

2.1.1 The materials shall consist of hard, durable particles or fragments of stone or gravel. Materials that break up when alternately frozen and thawed or wetted and dried shall not be used for aggregate base course materials. Fine particles shall consist of natural or processed sand. The materials shall be free of harmful amounts of organic material. Unless otherwise specified, the percent wear of base course material shall not exceed 50 percent as determined by AASHTO T 96, Grading A. 2.1.2 Crushed stone shall be processed material obtained from a source that has been stripped of all overburden. The processed material shall consist of clean, durable fragments of ledge rock of uniform quality and reasonably free of thin or elongated pieces. 2.1.3 Materials for glass cullet shall either be separated/recyclables received from a recycling facility permitted (pursuant to RSA 149-M:10) by the Waste Management Division of the Department of Environmental Services and/or materials certified for Direct Re-Use in accordance with Env-Sw 1500. 2.1.3.1 Glass cullet shall meet the requirements of AASHTO M318.

2.2Gradation. The required gradation of base course material shall conform to Table 304-1.

2.3Sand. The maximum size of any stone or fragment shall not exceed three-fourths of the compacted depth of the layer being

placed but in no case larger than 6”.

2.4Gravel. The maximum size of stone particles shall not exceed three- fourths of the compacted thickness of the layer being

placed but in no case larger than 6”.

2.5Crushed gravel. At least 50 percent of the material retained on the 1” sieve shall have a fractured face.

2.6Crushed gravel for shoulder leveling. This material shall consist either of a crushed a ggregate, or a blend of crushed

aggregate and reclaimed asphalt or concrete materials. Reclaimed Asphalt Pavement (RAP) and/or Reclaimed Concrete Aggregate

requirements of Item 304.32 in Table 304- 1 prior to blending with reclaimed materials. The reclaimed materials shall meet the requirements of 2.6.1 or 2.6.2 as applicable prior to blending with crushed aggregate. 2.6.1 RAP for this purpose shall be processed by either crushing or screening such that 100% of the material passes the 1 ” sieve. Screening will only be allowed if the source of the RAP is pavement millings from cold planning bituminous surfaces. 2.6.2 RCA shall meet the requirements of AASHTO M 319, except for its gradation requirements. 100% of the mat erial shall pass the 1” sieve.

2.7Crushed aggregate for shoulders. This material shall meet the gradation requirements of Table 304-1.

2.8Gravel for drives. The material shall meet the requirements of gravel as shown in Table 304-1.

2.9Crushed gravel for drives. The material shall meet the gradation requirements of either crushed gravel or crushed stone

2.10Crushed stone base course (fine gradation). Acceptable sand may be blended as necessary to obtain the proper gradation

for the fine aggregate portion.