00597.11 675 Section 00597 - Sound Walls
Description
00597.00Scope - This Work consists of furnishing and constructing sound walls at the locations
shown or as directed.
Use one of the following sound wall types:
• Concrete block walls • Precast concrete panel walls • Concrete panel fence walls
00597.01Variables - The amount and kind of Work required to construct a sound wall varies
according to the type of wall selected. Be responsible for determining the Work required for each wall type and for the variables in quantities, including shoring, excavation, backfilling, excess material, staging Work and other details of the Work .
Materials
00597.10Materials - Obtain all manufactured materials for the selected sound wall type from the
same company. Only one type of wall will be allowed on the Project unless otherwise specified.
Store concrete masonry units and cementitious materials at the Project Site in a manner which will protect the materials from contact with Soil and weather. Store mortar and grout materials in original unbroken packages.
00597.11Concrete Block Sound Wal ls:
• Hollow, load- bearing blocks, graded N -1, f'm = 1,300 psi with 2,000 psi 28-Day strength on net cross sectional area, according to ASTM C90 • Kiln dried to 33 percent total absorption • Split face surface on wall block exposed faces • Standard block on unexposed areas and pilasters • Nominal 8 inch by 8 inch by 16 inch blocks for walls and nominal 16 inch by 8 inch by 16 inch blocks for pilasters • Manufactured with water repellent admixture meeting the requirements of 00597.11(h) Do not tint concrete blocks. Use uniform colored blocks along the length of individual walls.
• Nominal 8 inch by 4 inch by 16 inch cap blocks for walls and nominal 16 inch by 4 inch by 16 inch cap blocks for pilasters • Same color as concrete blocks Manufactured with water repellent admixture meeting the requirements of 00597.11(h)
00597.12 676 (d) Concrete - For pile footings, furnish concrete according to Section 00440. For all other components, including spread footings, furnish concrete according to Section 00540.
ultimate compressive strength of at least 2,500 psi at 28 D ays. Furnish coarse grout meeting the requirements of ASTM C476 with a suitable consistency for pouring without segregation of materials. Furnish water repellent admixture in the mortar.
of 02440.10.
from the QPL.
and cap precast units. Incorporate water repellent admixture of the same manufacturer and meeting the requirements of ASTM C1384 in the mortar. Proportion and mix the admixture according to t he manufacturer’s recommendations to control efflorescence and ensure compatibility and bond of the wall components. Ensure no loss of flexural bond strength as a result of adding the admixture. Statistically compare the flexural bond strength of blocks with admixture to a control (blocks without admixture). Test CMU and mortar according to ASTM C1072 as directed by ASTM C1384.
Select a water repellent admixture from the following list or other approved equal:
Blocktite by Euclid Chemical www.euclidche mical.com 800-321 -7628
Dry-Block by Grace Construction Products www.graceconstruction.com 877-423 -6491
Hycrete M1000 by Hycrete Technologies www.hycrete.com 866-492 -7383
00597.12Precast Concrete Panel Sound Walls:
Section 00540.
00597.13Concrete Panel Lock Fence Sound Walls:
manufacturer's test results and certificate of compliance according to 00165.35.
Section 00440. For all other components, furnish concrete meeting the requirements of Section 00540. 00597.41 677 Construction
00597.40General - Perform structure excavation according to Section 00510 to the limits and stages
shown. All sound walls, regardless of type, shall conform to the top of wall profile shown. Provide footings as shown or approved.
00597.41Concrete Block Sound Walls :
pattern. Place masonry according to accepted standards of good practice and Work in masonry construction and as shown.
If Work is discontinued, protect the top of the wall with a well -secured waterproof cover.
Do not perform masonry Work when the surrounding temperature is less than 35 °F unless provisions are made for heating and drying materials and for protecting the Work .
Do not backfill walls until at least 24 hours after damp-proofing is applied. Use clean, dry, ice- free, and frost-free masonry units. Do not dampen units before or during laying unless approved.
Place the first course of masonry on the footing in a full mortar bed. Mortar joints between units shall be 3/8 inch thick with full mortar coverage on vertical and horizontal face shells only. Vertical joints shall be shoved tight.
Discard mortar when:
• Not used within 2 hours of initial mixing • Stiffened due to hydration past initial set • Stiffened due to evaporation • Allowed to stand 1 hour without mixi ng Grout all cells containing reinforcing bars. Walls and crosswebs forming cells to be filled shall be full-bedded in mortar to prevent leakage of grout. Grout may stop in cells containing bars where, and if, the reinforcement stops. Position vertical steel in the center of the cell and securely tie in place at intervals of not more than 5 feet. Use grout that is sufficiently fluid to flow into all grout spaces, leaving no voids. Perform grouting according to either "low -lift grouting" or "high-lift grouting" as follows:
• Do not exceed 4 feet high wall construction before placing grout. • Construct vertical cores or cells of a clear, unobstructed size measuring not less than 2 inches by 3 inches. • Rod or vibrate grout when placed. • Position reinforcing steel and tie in place. • Do not proceed with constructing the wall above a bond beam course until the vertical cells below the bond beam course and the bond beam course itself have been filled with grout. • When the time interval between Lifts will exceed 1 hour, stop the Lifts 1 1/2 inches below the top of the course. 00597.42 678
will exceed 4 feet, do the following:
• Leave cleanouts, with a minimum opening of 3 inches by 4 inches as shown, in the bottom course of the placement at each vertical cell. Keep cleanouts open until all mortar droppings have been removed and vertical reinforcing steel has been placed and inspected. • Remove excess mortar from vertical cores and expose an unobstructed vertical hole with a dimension of at least 2 inches and a cross -sectional area of at least 10 square inches. • Do not start grout Work until 24 hours after the portion of the wall to be grouted has been constructed. • Do not place grout in Lifts greater than 4 feet in height. Rod or vibrate grout not later than 10 minutes after placing and before the preceding Lift takes its permanent set. Extend rodding or vibrating 12 inches to 18 inches into the preceding Lift. • Do not begin grouting successive Lifts until at least 30 minutes have elapsed after rodding or vibrating the preceding Lift . • If the time interval between Lifts will exceed 1 hour, stop the Lifts 1 1/2 inch below the top of the course. • Place wire screen, small mesh, expanded metal lath or other approved material in mortar joints under each bond beam course to prevent filling vertical cells not intended to be filled.
high-build filler and rubber sealer. Treat at least 14 Calendar Days after the wall is completed. Apply filler by spr aying or rolling according to the manufacturer's recommendations. Apply two coats of sealer to a minimum thickness of 10 mils. The finished product shall be the color "Summer Gray".
masonry walls. Apply damp-proofing at least 14 Calendar Days after the walls are completed and according to the manufacturer's recommendations.
00597.42Precast Concrete Panel Sound Walls - Construct precast concrete panel sound wa lls
plumb, level and true. Panels shall be free of major cracks. Cracks in panels will be measured after the panel is placed and walls have been backfilled. Cracks greater than 0.02 inch may require repairs or panel replacement, at the discretion of the Engineer.
00597.43Concrete Panel Lock Fence Sound Walls - Construct concrete panel lock fence walls
according to the manufacturer's recommendations.
Measurement
00597.80Measurement - The quantities of sound walls will be measured on the area basis. Field
measurement of each sound wall will not be made. The quantity will be the quantity shown in the Schedule of Items for each sound wall unless changes are ordered in writing by the Engineer. The area of sound wall in the Schedule of Items is based on the following:
Vertical limits between the top and bottom of the wall panel or masonry units, exclusive of pilasters but including cap blocks. If the sound wall contains pilasters, the horizontal limits are between the centerline of pilasters shown in the Contract Plans wall elevation. 00597.90 679 If the sound wall does not contain pilasters, the horizontal limits are between changes in wall height or the ends of the wall.
If changes are ordered, an adjustment will be made only for the quantity difference involved in the ordered plan changes and will be limited to the area of the change, determined using the vertical and horizontal area limits described in this Subsection.
Payment
00597.90Payment - The accepted quantities of sound walls will be paid for at the Contract unit price,
per square foot, for the item "Sound Walls". Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment , labor, and Incidentals necessary to complete the Work as spec ified.
No separate or additional payment will be made for excavation, backfill, footings, concrete, reinforcement, waterproofing, or damp -proofing.