CDG Engineers and Associates Andalusia, Alabama
Document 00910 Form of Addendum
DOCUMENT 00910 FORM OF ADDENDUM - NO. 2 DATE:
May 13, 2016
PROJECT:
North Montgomery Landfill Cell 10A
PROJECT NUMBER: 061683710 OWNER:
City of Montgomery 117 Division Street Montgomery, AL 36104
ENGINEER:
CDG Engineers and Associates 1840 East Three Notch Street Andalusia, AL 36421
TO:
Prospective Bidders
This Addendum forms a part of the Contract Documents and modifies the Bidding Documents dated April 2016. Acknowledge receipt of this Addendum in the space provided in the Bid Form. Failure to do so may disqualify the Bidder. This Addendum consists of six (6) pages.
CHANGES TO THE CONTRACT DOCUMENTS AND SPECIFICATIONS: SECTION 02060-AGGREGATE – Revision to Section 2.1 B – Aggregate for Leachate Collection System
ISSUED THIS 13th DAY OF May, 2016
____________________________________ R. Daniel Wells, P.E. Sr. Project Manager
00910 - 1
CDG Engineers and Associates, Inc. Andalusia, Alabama
Section 02060 Aggregate
SECTION 02060 AGGREGATE PART 1 GENERAL 1.1
1.2
1.3
SUMMARY A.
Section Includes: 1. Coarse aggregate materials. 2. Fine aggregate materials. 3. Aggregate materials for Leachate Collection System.
B.
Related Sections: 1. Drawings and general provisions of the Contract including General and Supplemental General Conditions, and Technical Specifications.
REFERENCES A.
American Association of State Highway and Transportation Officials: 1. AASHTO M147 - Standard Specification for Materials for Aggregate and SoilAggregate Subbase, Base and Surface Courses. 2. AASHTO T180 - Standard Specification for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop.
B.
ASTM International: 1. ASTM C136 - Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates. 2. ASTM D698 - Standard Test Method for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3)). 3. ASTM D1557 - Standard Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort (6,000 ft-lbf/ft3 (2,700 kN-m/m3)). 4. ASTM D2487 - Standard Classification of Soils for Engineering Purposes (Unified Soil Classification System). 5. ASTM D4318 - Standard Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils.
SUBMITTALS A.
Section 01330 - Submittal Procedures.
B.
Samples: Submit, in air-tight containers, 10 lb sample of each type of fill to testing laboratory.
C.
Materials Source: Submit name of imported materials suppliers.
D.
Manufacturer's Certificate: Certify Products meet or exceed specified requirements.
02060-1
CDG Engineers and Associates, Inc. Andalusia, Alabama
1.4
Section 02060 Aggregate
QUALITY ASSURANCE A.
Furnish each aggregate material from single source throughout the Work.
PART 2 PRODUCTS 2.1
COARSE AGGREGATE MATERIALS A.
Coarse aggregate shall consist of crushed or uncrushed gravel, crushed stone. Or crushed slag, having hard, strong, durable pieces, free from adherent coatings.
B.
AGGREGATE MATERIALS FOR LEACHATE COLLECTION SYSTEM The material shall meet the requirements of Class I and Class II of ASTM D2321 nonangular 1/2 inch to 2 inch crushed stone. The material shall be worked into the pipe haunch to create lateral support for the pipe. The crushed stone shall be granite or similar approved non-calcareous material. Sieve Size 2 inches 1-1/2 inch 1 inch 3/4 inch 1/2 inch 3/8 inch No. 4 No. 8 No. 16 No. 50 No. 200
C.
Percent Passing 100 100 70 to 100 0 to 15 0 to 5 0 to 5 ---------------------
Coarse Aggregate Type A1 limestone or granite (ALDOT Aggregate size No.4) shall be graded in accordance with the following limits: Sieve Size 2 inches 1-1/2 inch 1 inch 3/4 inch 1/2 inch 3/8 inch No. 4 No. 8 No. 16 No. 50 No. 200
D.
Percent Passing 100 90 to 100 20 to 55 0 to 15 ----0 to 5 ---------------------
Coarse Aggregate Type A2 limestone or granite (ALDOT Aggregate size No.57) shall be graded in accordance with the following limits:
02060-2
CDG Engineers and Associates, Inc. Andalusia, Alabama
Section 02060 Aggregate
Sieve Size 2 inches 1-1/2 inch 1 inch 3/4 inch 1/2 inch 3/8 inch No. 4 No. 8 No. 16 No. 50 No. 200 E.
Percent Passing ----100 95 to 100 ----25 to 60 ----0 to 10 0 to 5 -------------
Coarse Aggregate Type A3 limestone or ganite (ALDOT Aggregate size No.78) shall be graded in accordance with the following limits: Sieve Size 2 inches 1-1/2 inch 1 inch 3/4 inch 1/2 inch 3/8 inch No. 4 No. 8 No. 16
F.
Percent Passing ------------100 90 to 100 40 to 75 5 to 25 0 to 10 0 to 5
Coarse Aggregate Type A4 limestone or granite (ALDOT 825B) shall be graded in accordance with the following limits, and shall meet the following specifications: Sieve Size 2 inches 1-1/2 inch 1 inch 3/4 inch 1/2 inch No. 4 No. 8 No. 16 No. 50 No. 200
Percent Passing 100 90 to 100 75 to 98 ----60 to 85 40 to 70 28 to 54 19 to 42 9 to 32 4 to 18
The fraction passing the No. 40 sieve shall not have a P.I. in excess of 6 nor a L.L. in excess of 25, and contain not more than 2/3 by weight passing the No. 200 sieve. 2.2
FINE AGGREGATE MATERIALS A.
Fine Aggregate Type A4 (Concrete Sand): Natural river or bank sand; washed; free of silt, clay, loam, friable or soluble materials, and organic matter; graded in accordance with ASTM C136; within the following limits: 02060-3
CDG Engineers and Associates, Inc. Andalusia, Alabama
Section 02060 Aggregate
Sieve Size 3/8 inch No. 4 No. 8 No. 16 No. 50 No. 100 B.
Percent Passing 100 95 to 100 80 to 100 50 to 90 5 to 30 0 to 10
Fine Aggregate Type A5 (Manufactured Sand): Natural river or bank sand; washed; free of silt, clay, loam, friable or soluble materials, and organic matter; graded in accordance with ASTM C136; within the following limits: Sieve Size 3/8 inch No. 4 No. 8 No. 16 No. 50 No. 100 No. 200
2.3
Percent Passing 100 95 to 100 ---50 to 80 20 to 50 10 to 25 5 to 12
SOURCE QUALITY CONTROL A.
Section 01400 - Quality Requirements.
B.
Coarse Aggregate Material - Testing and Analysis: Perform in accordance with ASTM D698, ASTM D1557, ASTM D4318, or ASTM C136.
C.
Fine Aggregate Material - Testing and Analysis: Perform in accordance with ASTM D698, ASTM D1557, ASTM D4318, or ASTM C136.
D.
When tests indicate materials do not meet specified requirements, change material and retest.
PART 3 EXECUTION 3.1
3.2
EXCAVATION A.
Coordinate removal of excess materials from site at no cost to the Owner.
B.
Remove excavated materials not meeting requirements for coarse aggregate materials and fine aggregate materials from site.
STOCKPILING A.
Stockpile materials on site.
B.
Stockpile in sufficient quantities to meet Project schedule and requirements. 02060-4
CDG Engineers and Associates, Inc. Andalusia, Alabama
3.3
Section 02060 Aggregate
C.
Separate different aggregate materials with dividers or stockpile individually to prevent mixing.
D.
Direct surface water away from stockpile site to prevent erosion or deterioration of materials.
E.
Stockpile unsuitable materials on impervious material and cover to prevent erosion and leaching, until disposed of.
STOCKPILE CLEANUP A.
Remove stockpile, leave area in clean and neat condition. Grade site surface to prevent free standing surface water. END OF SECTION
02060-5
