805Riprap and Curbing Stone

805.1 General Description

This section includes the requirements for riprap and curbing stone. Construction and material will be covered under the Special Provisions.

805.1.01 Related References

A. Standard Specifications General Provisions 101 through 150. B. Referenced Documents AASHTO T 96 AASHTO T 104 ASTM C 295 ASTM D 5519

805.2 Materials

805.2.01 Riprap

A. Requirements 1. Aggregate Quality All riprap stone shall be made of sound, durable rock pieces that meet these requirements: Aggregate Quality Maximum Percent Abrasion loss “B” grading 65 Soundness loss 15 Flat and slabby pieces (length five times more than the average thickness) 5 Weathered and/or decomposed pieces and shale 5 2. Gradation for Stone-Dumped riprap Type 1 and Type 3: Severe Drainage Conditions or Moderate Wave Action (Type 1)* Size By Volume Approx. Weight Percent Smaller Than 4.2 ft.³ (0.12 m³) 700 lbs. (320 kg) 100% 1.8 ft.³ (0.05 m³) 300 lbs. (135 kg) 50% - 90% 0.8 ft.³ (0.02 m³) 125 lbs. (55 kg) 20% - 65% *Between 0% and 15% of the Type 1 riprap shall pass a 4 in. (100 mm) square opening sieve. General Use Normal Drainage Conditions (Type 3)* Size By Volume Approx. Weight Percent Smaller Than 1.0 ft.³ (0.03 m³) 165 lbs. (75 kg) 100% 0.1 ft.³ (0.003 m³) 15 lbs. (7 kg) 10% - 65% *Between 0% and 15% of the Type 3 rip rap shall pass a 2 in (50 mm) square opening sieve. 3. Stone for Plain Riprap The stones shall be clean and free of rock dust and fines. a. Process the stone so that the largest pieces have a volume of 2 ft.³ (0.06 m³) or less. b. Ten percent or less of the total riprap weight can consist of spalls that pass a 5 in. (125 mm) sieve. 4. Stone Plain Riprap for Stream Details Stone Plain Riprap for Stream Details shall be clean and essentially free of rock dust and fines. Stone shall be relatively flat on either side in the same dimension, preferably the long dimension. The material shall be processed such that 90 percent of the particles within the size class shall have all dimensions within the ranges stated in the size classifications listed below: TYPE A: Stone in this size class shall meet the following gradation requirements: Size Percent by weight Passing 12 in. Sieve 100 Passing 4 in. Sieve 0-25 Passing No.4 Sieve (4.75 mm) 0-10 Test: Method of Test shall be in accordance with the following: Sieve Analysis AASHTO: T 27 For use as fill for upstream fill portions of Cross Vanes, Rock Vanes, J-Hook Vanes, and in other structures and areas as indicated on the plans and details, as directed and approved by the Engineer. TYPE B: Generally, 2-4 cubic feet and weighing 0.16-0.33 tons. Maximum weight for this size class can be 0.52 ton. The dimensions of these stones shall be 2 ft. x 1 ft. x 1 ft. to 2 ft. x 2 ft. x 1ft. Variability is allowed, however, with 1 ft. being the smallest dimension and 2.5 ft. being the largest dimension along any axis to be accepted within this size class. For use in Root Wad structures, Rock Vanes, Cross Vanes, J-Hook Vanes, and in other in-stream structures as indicated on the plans and details, as directed and approved by the Engineer. TYPE C: Generally, 4-8 cubic feet and weighing 0.33-0.66 tons. Maximum weight for this size class can be 1 ton. The dimensions of these stones shall be 2 ft. x 2 ft. x 1 ft. to 2 ft. x 2 ft. x 2 ft. Variability is allowed, however, with 1 foot being the smallest dimension and 2.5 feet being the largest dimension along any axis to be accepted within this size class. For use in Root Wad structures, Rock Vanes, Cross Vanes, J-Hook Vanes, and in other in-stream structures as indicated on the plans and details, as directed and approved by the Engineer. TYPE D: Generally, 12-18 cubic feet and weighing 1.0-1.5 Tons. Weight range can vary between 1 ton up to 2 tons. The dimensions of these stones shall be 3 ft. x 2 ft. x 2 ft. to 3 ft. x 3 ft. x 2 ft. Variability is allowed, however, with the smallest dimension being 2 ft and 3.5 ft. being the largest dimension along any axis to be accepted within this size class. For use in in-stream structures such as Cross Vanes, J-Hook Vanes, Rock Vanes and in other structures and areas as indicated on the plans and details, as directed and approved by the Engineer. TYPE E: Generally, 24-72 cubic feet and weighing 2.0-6.0 tons. Weight range can vary between 2 tons up to and exceeding 6 tons with approval by the Engineer. The dimensions of this size class shall be to 6 ft. x 4 ft. x 3 ft. However, variability is allowed in that dimensions for this size class shall fall between the smaller 4 ft. x 3 ft. x 2 ft. and a maximum as determined by the Engineer. For use in large in- stream structures such as Cross Vanes, J-Hook Vanes, Rock Vanes, Step Pools, and in other structures and in areas indicated on the plans and details, as directed and approved by the Engineer. B. Fabrication General Provisions 101 through 150. C. A cceptance Test as follows: Test Method Percent wear AASHTO T 96 Petrographic analysis ASTM C 295 Riprap size ASTM D5519-07 Soundness (magnesium sulfate) AASHTO T 104 D. Materials Warranty General Provisions 101 through 150.

805.2.02 Curbing Stone

A. Requirements 1. Type A: Provide Type A curb that meets these requirements: a. Curb thickness and height as shown on the plans b. Cut in lengths of not less than 5 ft. (1.5 m) nor more than 10 ft. (3 m) c. Tops dressed to an even, smooth surface for the full length d. Have straight, even edges e. Top sloped ¼ in. (6 mm) from back to front f. Have squared ends to permit joints to be constructed not more than ½ in (13 mm) wide for the full depth of the curb. g. Backface hand dressed at least 4 in. (100 mm) below that part of the back that will be exposed h. Front face hand dressed to a depth of 1 in. (25 mm) below the indicated elevation of the base course, pavement or gutter i. Have ends of circular curb sections cut along radial lines to permit joints to be constructed not more than ½ in. (13 mm) wide j. Circular curb conforms accurately to the required radius k. Dressed surfaces do not contain projections or depressions more than 3/8 in. (10 mm) from the plane surface of the curb 2. Type B: Provide Type B curb that meets these requirements: a. Dimensions shall be 5 in. (125 mm) thick, 17 in. (425 mm) deep, and 5 ft. (1.5 m) long, unless otherwise specified. b. Front face to have a top margin draught with a smooth face 10 in. (250 mm) deep c. Have a smooth face (Note: A quarry face may be considered a smooth face if free from holes and all bumps exceeding allowed tolerances are pointed level d. Tops of curbs present even, smooth faces for the full length e. Have squared joints that when abutted with adjacent sections, present no crack or joint exceeding ½ in. (13 mm) in width f. Have ends of circular curb sections cut along radial lines to permit joints to be constructed not more than ½ in. (13 mm) wide g. Circular curb conforms accurately to the required radius h. The allowable tolerances for Type B Curb dimensions are as follows: Measurement Item Dimension & Tolerance Thickness 5 ¼ in. (131 mm) +/- ¼ in. (6mm) Depth 17 in. (425 mm) +/- 1 in. (25 mm) Top Surface ¼ in. (6 mm) in 5 ft. (1.5 m) Side Surface ½ in. (13 mm) in 5 ft. (1.5 m) B. Fabrication General Provisions 101 through 150. C. Acceptance Test for Percent Wear according to AASHTO T 96 D. Materials Warranty General Provisions 101 through 150.