403HOT BITUMINOUS PAVEMENT

New Hampshire Department of Transportation Standard Specifications – 2016

Description

1.1This work shall consist of cons tructing one or more courses of bituminous pavement on a prepared base as shown on the

plans or as ordered. The methods may be classified as hand or machine. 1.1.1 Hand method shall include only the paving of ra ised islands, slopes, cattle passes, areas between rails at railroad crossings, existing sidewalks, drives, drive aprons, curb patch between concrete barrier and pavement, curb patch between granite curb and pavement, and paving of 50 tons or less added after the completion of paving operations. 1.1.2 Machine method shall include all paving not classified as hand method.

1.2When specified this work shall consist of constructing one or more courses of hot bituminous pavement using modifier to

create higher strength.

1.3This work shall consist of constructing bituminous pavement under nighttime operation and will be indicated in the item

description. The location shall be as shown on the plan or as ordered. Materials

2.1Materials and their use shall conform to the requirements of 401.2.

2.2Temporary bituminous pavement shall conform to Ta ble 401-1. Thickness shall be as shown on the plans or as ordered by

the Engineer. Construction Requirements

3.1Construction requirements shall be as prescribed in 401.3.

3.2For temporary pavement only, amend portions of 401.3.12 as follows:

3.2.1 The requirements of 401.3.12.2.1 shall apply except rolling may be accomplished with a dual vibrating steel drum roller. 3.2.2 Delete 401.3.12.3.

3.3For temporary bituminous pavement only delete 401.3.13.7.

3.4Temporary bituminous pavement shall be removed when no longer needed.

Methods of Measurement

4.1Hot bituminous pavement will be measured as prescribed in 401.4.

4.1.1 Hot bituminous pavement, machine or hand method (night) will be measured in the same manner as 4.1. No separate measurement will be made for lighting necessary at the plant or at the site Hot Bituminous pavement transferred by the Mater ial Transfer Vehicle (MTV) will be measured as prescribed in 401.4. Basis of Payment

5.1The accepted quantities of hot bituminous pavement will be paid for at the Item Bid Price per ton for the bituminous mixture,

complete in place. 5.1.1 The accepted quantity of hot bituminous pavement, machine or hand method (night) will be paid for at the Contract unit price per ton complete in place. 5.1.2 No separate payment will be made for any costs of plant or project lighting, or overtime for night work needed due to night operations.

5.2Bridge wearing course will be paid under machine method.

5.3The accepted quantity of temporary bituminous pavement will be paid for at the Contract unit price per ton complete.

5.3.1 Removal of the temporary pavement will not be paid for under other items of the Contract but will be subsidiary.

New Hampshire Department of Transportation Standard Specifications – 2016 Pay items and units:

403.11Hot Bituminous Pavement, Machine Method Ton

9 Hot Bituminous Pavement, Machine Method, High Strength Ton

403.12Hot Bituminous Pavement, Hand Method Ton

403.351 Hot Bituminous Pavement, Aggregate 35 percent Wear,

Machine Method Ton

2 Hot Bituminous Pavement, Aggregate 35 percent Wear, Hand

Method Ton

403.4Material Transfer Vehicle (MTV) Ton

403.6Pavement Joint Adhesive Linear Foot

403.61Pavement Joint Adhesive (Bridge Base) Linear Foot

403.65Echelon Paving Linear Foot

403.911 Hot Bituminous Bridge Pavement, 1” Base Course Ton

15 Hot Bituminous Bridge Pavement, 1” Base Course, Aggregate

50 Percent Wear Ton

403.98Hot Bituminous Concrete Leveling, Machine Method Ton

403.99Temporary Bituminous Pavement Ton

403.XXXX1 Hot Bituminous Pavement, _______(QC/QA Tier 1) Ton 403.XXXX2 Hot Bituminous Pavement, ______ (QC/QA Tier 2) Ton 403.XXX9X Hot Bituminous Pavement, ________ (Night) Ton

1010.3Quality Control/Quality Assurance (QC/QA) for Asphalt Dollar

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of preparing and applying one or more seal coats of bituminous material to a gravel or stone course.

This work shall also consist of a tack coat applied to a bituminous concrete surface or a Portland cement concrete surface. Materials

Bituminous material shall be the type and grade specified or ordered and shall conform to the requirements of Section 702.

Blotter material shall be natural sand composed of hard, durable particles, free from loam, showing uniform resistance to

abrasion. Gradation shall conform to Table 520-2. Construction Requirements

Limitations. Bituminous material shall not be applied on a wet surface, or when weather conditions would prevent the proper

application and curing of the coat. The quantities, rate of application, temperatures, and areas to be treated shall be approved before application of bituminous material.

Equipment.

Equipment required for this work shall be as follows:

applied uniformly on varia ble widths of surface up to 12 ft , at readily determined and controlled rates from 0.02 to 2.0 gal/yd2, with uniform pressure, and with an allowable variation from any specified rate not to exceed 0.02 gal. Distributor equipment shall include a tachometer, pressure gauges, accurate volume measuring devices or a calibrated tank, and a thermometer for measuring temperatures of tank contents. Distributors shall be equipped with a power unit for the pump and with full circulation spray bars adjustable laterally and vertically. The spray bar shall contain spray nozzles providing a fan-shaped spray pattern adjusted so the vertical axis is perpendicular to the pavement surface. The spray pattern and spray bar height shall be adjusted to provide a uniform application of the tack coat without double coverage. The distributor shall be equipped with a mechanical device to adjust the spray height as material is discharged to keep a uniform height above the pavement for full coverage without overlapping. The distributors hall also be equipped with a hand-held spray attachment for applying the material to areas inaccessible to spray bars and to fill in irregular areas to provide full coverage. Approved sampling valves shall be installed in distributors and transport tank tr ucks to permit taking representative samples of the contents. The recommended location of the sampling valve is in the rear bulkhead of the tank roughly one-third of the height above the bottom. The inlet pipe shall project into the contained liquid as sho wn in AASHTO T 40. At least 1 qt of material shall be drained off through the sampling valve and discarded before the desired sample is taken. New sample containers will be furnished by the Engineer. To prevent the loss of solvents, containers shall be sealed with a tight fitting cover immediately after being filled.

bituminous material.

Preparation of Surface to be Treated.

3.3.1 Tack coat. The existing surface shall be patched and shall be free of irregularities to provide a reasonably smooth and uniform surface to receive the treatment. Unstable corrugated areas shall be removed and replaced with suitable patching materials. The edges of existing pavements that are to be adjacent to new pavement shall be cleaned to permit the adhesion of bituminous materials.

Application of Bituminous Material.

3.4.1 Tack coat. Bituminous material shall be uniformly applied with an approved applicator. When ordered, a pressure distributor shall be used. The tack coat shall be applied in such a manner as to offer the least inconvenience to traffic and to permit one-way traffic without pickup or tracking of the bituminous material. 3.4.1.1 A tack coat shall be applied immediately prior to placement of pavement. The rate of application of emulsified asphalt shall be between 0.02 and 0.08 gal/yd2, based on the application table below. The Engineer may further modify the rate depending on the relative absorbance and texture of the pavement surface.