A06_-_140L1721Q0050_-_Section_321540_1.pdf

BLM CO State Office

05/11/2020 CRUSHER FINES

BLM-CO GJFO Grand Valley Open OHV Staging Area Phase III 32 15 40 - 1

SECTION 32 15 40 - CRUSHER FINES SURFACING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Preparation, stockpiling, hauling, placing, and compacting of crusher fines (also referred to as “trail surfacing” or “trail mix” as indicated on the Drawings and specified herein.

B. Related Requirements:

1. The following is a list of Sections, which may be related to this section:

a. Section 31 20 00, Earth Moving

C. Referenced Standards

1. American Association of State Highway and Transportation Officials (AASHTO):

a. M147, Standard Specification for Materials for Aggregate and Soil Aggregate

Subbase, Base, and Surface Courses.

b. T11, Standard Method of Test for Materials Finer Than 75�m (No. 200) Sieve in

Mineral Aggregates by Washing.

c. T27, Standard Method of Test for Sieve Analysis of Fine and Coarse Aggregates.

d. T89, Standard Specification for Determining the Liquid Limit of Soils.

e. T90, Standard Specification for Determining the Plastic Limit and Plasticity Index of Soils.

f. T99, Standard Specification for the Moisture-Density Relations of Soils Using a 2.5 kg (5.5 pound) Rammer and a 305 mm (12 in) Drop.

g. Revised 08/2015

h. T180, Standard Specification for Moisture-Density Relations of Soils Using a 4.54 kg (10-lb) Rammer and a 457 mm (18-in) Drop.

i. T265, Standard Method of Test for Laboratory Determination of Moisture Content of Soils.

j. T310, Standard Specification for In-Place Density and Moisture Content of Soil and

Soil-Aggregate by Nuclear Methods (Shallow Depth).

2. ASTM International (ASTM):

a. C136, Standard Test Method for Sieve Analysis of fine and Coarse Aggregates

b. D698, Standard Test Methods for Laboratory Compaction Characteristics of Soil

Using Standard Effort (12 400 ft-lbf/ft3 (600 kN-m/m3)).

c. D1557, Standard Test Methods for Laboratory Compaction Characteristics of Soil

Using Modified Effort (56,000 ft-lbf/ft3(2,700 kN-m/m3)).

d. C88, Test Method for Soundness of Aggregates by Use of Sodium Sulfate or

Magnesium Sulfate.

e. D2488, Standard Practice for Description and Identification of Soils (Visual-Manual

Procedure)

f. D4791, Test Method for Flat Particles, Elongated Particles, or Flat and Elongated

Particles in Coarse Aggregate

3. Colorado Division of Transportation “Standard Specification for Road and Bridge

Construction” Current Edition

BLM-CO GJFO Grand Valley Open OHV Staging Area Phase III 32 15 40 - 2

1.3 MEASUREMENT AND PAYMENT

A. General: Measurement and payment for crusher fines will be either by the lump-sum method or by the unit-price method as determined by the listing of the bid items for earthwork indicated in the Bid Schedule or the Bid Form

1. Items Not Measured for Payment:

a. Compacting original ground or scarified sub grade will not be measured separately for payment, and all costs in connection therewith will be considered incidental to the material or structure to be placed or constructed on the compacted original ground or sub grade.

b. Sub grade preparation will not be measured separately for payment, and all costs in connection therewith will be considered incidental to the material or structure to be placed or constructed on the sub grade or bearing foundation

c. Applying herbicide will not be measured separately for payment.

d. Re-handling of stockpiled material will not be measured separately for payment, but will be considered incidental to the earthwork to which it pertains.

e. Spoiling excavated material and management of spoils stockpile will not be measured separately for payment.

2. Payment: Payment for crusher fines will be made at the Contract unit prices for the computed quantities as determined by the measurement methods specified herein.

Payment will be made only for items listed in the Bid Schedule of the Bid Form. All other work will be considered incidental to and included with the Bid Items.

1.4 SUBMITTALS

A. Contractor shall cooperate with Government in obtaining and providing samples of all specified materials.

B. Contractor shall submit certification from the supplier certifying the crusher fines, or approved equal, meets the requirements of this Specification.

C. Contractor shall submit certified laboratory test certificates for all items required in this section.

1. Sieve Analysis according to AASHTO T 99.

2. A Loose Wet Density of the material according to Jigging Method ASTM C 29.

3. Atterburg limits according to ASTM D 4318 PART 2

PART 2 - PRODUCTS

2.1 HERBICIDE

A. Herbicide shall be Casoron 4G granular weed and grass killer or approved equal.

2.2 SEPARATION GEOTEXTILE

A. Separation geotextile shall be woven CDOT class 2 from a CDOT approved vendor.

2.3 CRUSHER FINES

A. Crusher Fines shall be furnished and installed to a minimum 6” compacted depth.

B. Aggregates: Crushed stone shall consist of inert materials that are hard, durable, with stone free from surface coatings and deleterious materials.

C. Crusher Fines shall be compacted to 95% compaction.

D. Finishing:

BLM-CO GJFO Grand Valley Open OHV Staging Area Phase III 32 15 40 - 3

1. The final layer of crusher fines shall be finished with equipment capable of shaping and grading the finished surface.

E. Gradations:

1. Gradation shall meet the gradation below or approved equal as approved by ENGINEER.

PART 3 - EXECUTION

3.1 GENERAL

A. Equipment:

1. Equipment shall be capable of performing the Work as described in this Section.

2. Equipment that is inadequate to obtain the results specified shall be replaced or supplemented as required to meet the requirements of this Section.

3. Any equipment that is used in an improper manner may be cause for rejection of the Work if in the opinion of Government the Work fails to meet the requirements of this Section.

4. Equipment used for compaction shall be the rolling type, vibratory type, or combination of both types, and shall be of sufficient capacity to meet the compaction requirements herein.

3.2 LAYOUT OF WORK

A. The Contractor shall stake or otherwise delineate the proposed alignment of the path according to the drawings. Obtain approval of the Government prior to proceeding with excavation and subgrade preparation.

B. Cut/fill bench for the crusher fines as shown on the drawings.

C. Grade area within limits of paving. Wet and roll subgrade to obtain a firm, uniform, compacted subgrade. Keep cut sides vertical and true to line horizontally with a uniform width.

3.3 WEED CONTROL

A. Herbicide/Chemical Applications

Standard US Sieve Size Percentage Passing by Weight

½ inch 100

⅜ inch 100

No. 4 65-80

No. 8 48-63

No. 16 40-49

No. 30 30-40

No. 50 20-27

No. 100 10-18

No. 200 10-12

Note: Materials shall consist of bank or pit run material.

BLM-CO GJFO Grand Valley Open OHV Staging Area Phase III 32 15 40 - 4

B. Apply Casoron 4G granular weed and grass killer or approved equal to prepared subgrade per manufacturer’s recommendations.

C. Apply Casoron 4G granular weed and grass killer at a rate of 250 - 300 pounds per acre. Apply approved equal at manufacturers recommended rate.

D. Herbicides or other chemicals shall be applied using well-maintained equipment by individuals working for Contractor who are properly licensed by any State and/or Federal Agency having jurisdiction over such applications. It shall be the responsibility of the Contractor to be knowledgeable of any and all current laws and regulations pertaining to herbicide and other chemical applications, and to notify Government or Governments Representative immediately if any request for herbicide or chemical applications by Government or Governments Representative is inappropriate as they pertain to these laws and regulations.

E. Herbicides or other chemicals shall not be applied during periods when wind or other physical conditions cause the herbicides or chemicals to be transported a distance of more than five (5) feet from the immediate area where they are being placed. It shall be the responsibility of the Contractor to stop Work immediately and notify the Government or Governments Representative if any weather or other physical condition exists, which would make the application of herbicides or other chemicals inappropriate.

F. All herbicides or other chemicals used shall be applied at a rate and strength, and by the method recommended by the manufacturer of the product being used.

3.4 SUB-GRADE PREPARATION

A. Make any corrections necessary to base furnished and installed under Section 31 20 00, Earth

Moving to bring grades to those necessary for drainage as shown on drawing.

B. Make sure proper drainage is available to ensure no standing water on the surface or adjacent to crusher fines including downspouts, when placed under roof overhang.

C. Place CDOT approved class 2 separation geotextile as shown on drawings.

3.5 PLACEMENT AND COMPACTION

A. The Contractor is responsible for controlling placement of the material; no additional compensation will be made for material placement in excess of the specified thickness or width.

B. Do not install crusher fines material during rain or snow. Do not install crusher fines on sub-grade that has standing water.

C. If the required compacted depth of the crusher fines exceeds 6 inches (6"), place course in two or more layers of approximately equal thickness. The minimum thickness of any one layer shall be four inches (4").

D. Add water to approximate optimum moisture content. Use roller or mechanical hand tamper for compaction. Compact to 95% Standard Proctor Density (ASTM D698-70) to a uniform thickness.

1. Use plate compactor on edges and hard to get areas.

2. Loose material shall not be present on final surface.

E. Top of path shall be flush with adjacent grade. Remove any excess gravel on edges. Ensure that there are no low spots, high spots, or standing water on or adjacent to path.

3.6 SURFACE FINISHING

BLM-CO GJFO Grand Valley Open OHV Staging Area Phase III 32 15 40 - 5

A. Use a smooth steel wheel roller for the final rolling of top surface of Crusher Fines. Water surface and evenly spread loose stones before final rolling. Make minimum of two complete passes over area to embed stones. Correct soft spots developed during rolling.

B. Compacted surface shall be smooth and free from waves and other irregularities. Unsatisfactory portions of base course shall be torn up, reworked, re-laid, and rerolled at no additional expense to the Owner.

3.7 INSPECTION

A. Finished surface shall be uniform and solid, with no evidence of chipping or cracking.

B. Compacted paving material shall be firm to the full depth of pavement with no soft areas.

C. Loose material shall not be present on the surface

D. No ruts shall be visible on the surface of the pavement.

E. Pavement sections that do not meet this specification, shall be repaired or replaced at the Contractor's expense.

3.8 REPAIRS

A. Excavate damaged area to depth of crusher fines paving material and square off sidewalls.

B. If area is dry, moisten damaged portion lightly and scarify.

C. Apply crusher fines to excavated area to finished grade.

D. Compact with an 8” to 10” hand tamp or 1000 lb. roller.

E. Repaired surface shall be smooth and free from waves and other irregularities. Unsatisfactory portions of base course shall be torn up, reworked, re-laid, and rerolled at no additional expense to the Owner.

END OF SECTION