309 ALASKA 2020 SECTION 612 SACKED CONCRETE SLOP E PROTECTION
612-1.01 DESCRIPTION . Construct sacked Portland cement concrete slope protection.
612-2.01 MATERIALS. Use materials that conform to the following:
Portland Cement . See Section 701 Aggregate. Plasticity Index of 5 maximum, as determined by ATM 204 and ATM 205. Meet the following gradation, as determined by ATM 304: Sieve Percent Passing 2-1/2 inch 100% No. 4 45 - 80% No. 200 0 - 10% Concrete Mix . Cement content: 4 sacks per cubic yard. Slump: 3 to 5 inches. Sacks . Use new or sound reclaimed sacks made of at least 10- ounce burlap or equivalent and approximately 19- 1/2 by 36 inches, measured inside the seams when the sack is laid flat. The capacity of each sack must be approximately 1.25 cubic feet.
612-3.01 CONSTRUCTIO N REQUIREMENTS. Smoothly finish the slopes on which the sacked
concrete is to be placed within 0.2 foot of the design grade. Place approximately 1 cubic foot of concrete in each sack. Immediately close the sack, place it in position, and lightly tamp it to conform with the slope and the adjacent sacks in place. “Stretcher,” as used herein, means a filled sack placed with its long dimension parallel to the contour of the slope. “Headers” are filled sacks placed at right angles to the stretchers. Lay the courses as follows:
1.First Course . Lay a double row of stretchers in a neatly trimmed trench.
2.Second Course. Lay a single row of headers.
3.Third and Remaining Courses . Place a single row of stretchers so tha t joints in succeeding courses are staggered. Place stretchers so that the folded ends will not be adjacent to one another. Place headers with the folds in toward the bank. Remove all dirt and debris from the top of the sacks before laying the next cours e on top. Do not place more than 4 courses of sacks in any tier until initial set has taken place in the first course of the tier. If delays occur in placing succeeding layers of sacks, apply dry cement to the joint before placing the succeeding course, as directed. Cure sacked concrete slope protection by sprinkling with a fine spray of water every 2 hours during the daytime for 3 days.
612-4.01 METHOD OF M EASUREMENT. By each sack complete in place.
310 ALASKA 2020 612-5.01 BASIS OF PA YMENT. Excavation and backfill are subsidiary. Payment will be made under: PAY ITEM Item Number Item Description Unit 612.0001.____ Sacked Concrete Slope Protection EACH 311 ALASKA 2020 SECTION 613 MONUMENTS AND MARKERS
613-1.01 DESCRIPTION . Furnish and install right -of-way monuments and culvert marker posts.
613-2.01 MATERIALS. Use materials that conform to the following:
Concrete Section 550, Class W Reinforcing Steel Section 503 Paint Acrylic resin or synthetic latex alkyd emulsion. Medium chrome yellow. Marker Posts Subsection 730- 2.05 and the details on the Plans
613-3.01 CONSTRUCTIO N REQUIREMENTS. Install right -of-way monuments according to the
Plans or as staked. Compact the foundation and backfill. Paint the portion of the monument that is above the ground. Install culvert marker posts at t he following locations:
1.The approach side of storm drain outfalls 30 inches and smaller
2.Field inlets that are not in paved parking lots
3.End sections to all cross culverts After driving, leave a 42- inch length of post above ground.
613-4.01 METHOD OF M EASUR EMENT. By each installation, complete in place.
613-5.01 BASIS OF PA YMENT. Payment will be made under:
PAY ITEM Item Number Item Description Unit 613.0001.____ Right -of-Way Monument EACH 613.0002.____ Culvert Marker Post EACH
Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 337–338 of 584.