PROJECT MANUAL Specifications Seafood Removal Walmart Store No 1186 Liberty TX

times and flows readily into spaces between reinforcement.
4. Use placement procedures to avoid segregation.
5. Deposit concrete as near as possible to its final position.
6. Hardened/Densified Floor Slabs: Place concrete in one continuous placement up to a maximum of 5,000
square feet. Placement over 5,000 sq ft may be performed provided written approval by Wal-Mart is
obtained contingent upon the Contractor’s demonstration of ability, equipment, and personnel to handle the
increased areas.
7. Integral color concrete floor slabs:
a. Clean tools to prevent contamination. Clean and bag boots when working on surface.
b. Employ methods to prevent dust and air-born debris from entering building and settling on slab
surface during finishing operations.
8. Do not place concrete over standing water, mud, frost, ice or snow.
9. Do no use wet screeds.
G. Consolidation:
1. Consolidate concrete complying with ACI 301 by vibrating, spading or rodding so that concrete is
thoroughly worked around reinforcing, embedded items and into the corner of forms.
2. Consolidate each layer of concrete with previously placed layers in manner that will eliminate air or stone
pockets which may cause honeycombing, pitting or places of weakness.
3. Do not insert vibrator into portions of concrete that have begun to set.
4. Do not use vibrators to transport concrete.
5. Keep spare vibrator on job site during concrete operations.
6. Use internal vibrator for formed elements, not form vibrators.
7. Slabs:
a. Consolidate slabs with vibrating laser screed.
b. Use internal vibration along construction joints at both formed and slab abutments. Vibrate under
plate dowels. Mark forms before concreting to properly locate dowels after concreting.
c. Do not use grate tampers, jitterbugs, or mesh rollers.
H. After concrete placement, adjust forms and bracing as necessary to maintain proper alignment and eliminate
leakage of cement paste.
3.11 FLOOR SLAB FINISHING PROCEDURES
A. General:
1. Do not add water to any slab surface during finishing operations.
2. Do not add cement to any slab surface during finishing operations.
3. Perform no finishing operation while water is present on slab surface.
B. Initial Leveling:
1. Complete bull floating, darbying and straight-edging before any bleed water is present on slab surface.
2. Use a checkrod or highway straightedge 10 feet wide minimum for initial and later leveling instead of bull
float where overall floor tolerances specified are greater than FF 20 / FL15.
C. Hand and Power Floating:
1. Do not start floating until following conditions are met:
a. Bleeding is complete and water is gone, including water sheen on slab surface.
b. Concrete will sustain the weight of finishers without creating more than 1/8 to 1/4 inch indentations.
c. Mortar is not thrown by rotating blades of power float.
2. The finisher shall determine the proper time to start finishing procedures for interior slab placements on the
basis the above conditions. It is noted for advisory purposes, however, that typical setting characteristics of
concrete materials will allow for initial power floating to begin 3-1/2 hour’s ± 1 hour after initial strike-off
(screeding), at which time the concrete should support a finisher on foot without more than approximately a
1/4 inch indentation in the slab surface. Variations in concrete materials, nature and proportion of
03312-19
Walmart #1186 – Liberty, TX 04/20/11
CMA/10118.034