Download 03 30 00 Cast In Place Concrete

DIVISION 3
CONCRETE
SECTION 03 30 00
CAST-IN-PLACE CONCRETE
1.0
GENERAL
1.1
DESCRIPTION
A.
Work included: Provide all cast-in-place concrete as indicated on the Drawings,
specified herein, and needed for a complete and proper installation.
1.
B.
Related work described elsewhere:
1.
2.
3.
4.
1.2
A.
Standards: Comply with standards specified in this Section and as listed in Section 01
08 50. In case of conflict between the referenced standards, the more stringent
requirements shall govern.
B.
Qualifications of installers:
1.
Throughout the progress of installation of the work of this Section, provide at least
one person who shall be thoroughly familiar with the specified requirements,
completely trained and experienced in the necessary skills, and who shall be
present at the site and shall direct all work performed under this Section.
2.
In actual installation of the work of this Section, use adequate numbers of skilled
workmen to insure installation in strict accordance with the approved design.
3.
In acceptance or rejection of work performed under this Section, the
Architect/Engineer will make no allowance for lack of skill on the part of workmen.
Quality control:
1.
In lieu of taking test cylinders of new cast in place concrete, the contractor shall
guarantee that the specified cast in place concrete shall be free from defects of
materials and workmanship for two (2) years from the date of final certificates.
Repair and or replace the defective work and materials and other associated
work required to repair or replace concrete, which becomes defective during the
guarantee period, without additional costs to the Owner. This guarantee will not
apply to defects caused by the failure of work by others, if such defects were
impossible to detect at the time of examination of the other work.
SUBMITTALS
A.
1.4
Alternates: Section 01 11 00
Excavating, Filling, and Grading: Section 02 22 00
Concrete Form-work: Section 03 10 00
Concrete Reinforcement: Section 03 20 00
QUALITY ASSURANCE
C.
1.3
Coordinate placement of concrete pads required in Division 16.
General: Comply with pertinent provisions of Section 01 33 00.
PRODUCT HANDLING
A.
13-173B
Protection: Use all means necessary to protect the materials of this Section before,
during, and after installation and to protect the work and materials of all other trades.
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SECTION 03 30 00
CAST-IN-PLACE CONCRETE
B.
1.5
Replacements: In the event of damage, immediately make all repairs and replacements
necessary to the approval of the Architect/Engineer and at no additional cost to the
Owner.
ALTERNATES
A.
The emergency generator pad has been designed to accommodate the larger fuel tank
that is requested in Alternate E-1.
2.0
PRODUCT
2.1
MATERIALS
A.
Portland Cement: Cement used for General Construction unless otherwise indicated,
shall conform to ASTM C150 Type I. All cement used shall be from the same mill and
manufacturer and shall be of uniform color and shade.
B.
Aggregate: The analysis of aggregate shall be submitted with mix information report as
previously specified. The same aggregate shall be used throughout the job.
1.
Coarse aggregate; hard, clean, durable, uncoated crushed stone conforming to
ASTM C33. Maximum size aggregate allowed is 1/5 of the narrowest dimension
between forms, not larger than 3/4 the minimum clear spacing between
reinforcing bars and not larger than 1/4 the thickness of the slabs. Percentages
by weight passing:
a.
b.
c.
d.
2.
2.2
1-1/2" Sieve
3/4" Sieve
3/8" Sieve
No. 4 Sieve
- 95 to 100
- 35 to 70
- 10 to 30
- Not More Than 5
Fine aggregate; hard, clean, durable natural sand, manufactured sand free from
silt, loam, and clay conforming to ASTM C33.
C.
Mixing water: Clean, potable and free from oil, acid, vegetable matter, alkalies, and
other salts.
D.
Admixtures:
1.
Air entraining admixture, ASTM C-260.
2.
Water reducing admixture: ASTM C-494, Type A, D.
3.
High range water reducing admixture (superplasticizer): "Eucon 37" by The
Euclid Chemical Company or "Sikament" by Sika Chemical Corporation. The
admixture shall conform to ASTM C 494, Type F or G.
4.
Non-corrosive, non-chloride accelerator:
"Accelguard 80" by The Euclid
Chemical Company or approved equal. The admixture shall conform to ASTM C
494, Type C or E.
5.
Prohibited admixtures: Calcium chloride. All admixtures shall not contain more
chloride ions than are present in municipal drinking water.
CONCRETE PROPERTIES
A.
Proportions strength and consistency of concrete:
1.
03 30 00 - 2
Proportions: Concrete shall be homogeneous, readily placeable, uniformly
workable, and proportioned in accordance with ACI 318. Proposed mix design
shall be submitted to Architect-Engineer for approval. The approved mix shall not
be changed without approval of Architect-Engineer.
13-173B
SECTION 03 30 00
CAST-IN-PLACE CONCRETE
2.
Strength: Concrete shall have a minimum compressive strength at 28 days of
3000 psi. Maximum slump shall be 4 inches. The method for determining the
cement/water ratio for each batch shall be one which is closely controlled and
easily checked at any time. All concrete shall contain the specified waterreducing or water-reducing-retarding admixture and/or high-range water-reducing
admixture (superplasticizer). All concrete slabs, placed at air temperature below
50oF shall contain the specified non-corrosive non-chloride accelerator. All
concrete required to be air-entrained shall contain an approved air-entraining
admixture. All pumped concrete, concrete for industrial slabs, architectural
concrete, concrete required to be water-tight and concrete with a water-cement
ratio below 0.50 shall contain the specified high-range water reducing admixture
(superplasticizer).
3.
Consistency: Concrete exposed to the weather shall contain 6% plus or minus
one entrained air with use of admixtures.
All
concrete
containing
the
high-range
water-reducing
admixture
(superplasticizer) shall have a maximum slump of 8" unless otherwise approved
by the Architect/Engineer. The concrete shall arrive at the job site at a slump of
2" to 3", be verified, then the high-range water-reducing admixture added to
increase the slump to the approved level. All other concrete shall have a
maximum slump of 3" for slabs and 4" for other members.
2.3
CURING MATERIALS
A.
Liquid curing and sealing compounds: Conform to ASTM C309 Type 1 and be equal to
the following acceptable products:
1.
2.
3.
Sonneborn; Kure-N-Seal
Symons; Cure & Seal
Euclid Chemical Company; Rez-Seal
This material shall not be used on any surface against which additional concrete is to be
placed. Curing compound may only be used on floors receiving additional finishes as
approved by subcontractor responsible for such finishes. Calcium Chloride is not
permitted refer to Article 2.1.D.5.
2.4
B.
Sheet material: Conform to ASTM C171, lap and tape joints.
C.
Absorptive mat or fabric: Jute or burlap cloth weighing approximately 9 oz. per sq. yd.
shall conform to AASHTO M182. Use two layers.
OTHER MATERIALS
A.
Expansion and control joint filler material:
1.
Premolded expansion joint filler; conforming to ASTM D1752 3/8" thick x depth of
slab.
2.
Bond breaker: 15# roofing felt or 6 mil. polyethylene film x depth of slab. Provide
in all locations where concrete would otherwise bond to wall material.
3.
Control joint filler; self leveling horizontal joint filler conforming to Fed. Spec. TTS-0022/e Type 1 Class A and be equal to the following acceptable products.
a.
b.
c.
B.
13-173B
Sonneborn; Sonolastic Paving Joint Sealant
A. C. Horn; Hornflex
Euclid Chemical Company; Thiokol Sealant
Vapor barrier under interior building slabs:
03 30 00 - 3
SECTION 03 30 00
CAST-IN-PLACE CONCRETE
1.
10 mil polyethylene film in compliance with ASTM E1745, or equal.
2.
Provide Vapor Seal with Plasmatic Core as Manufactured by W.R. Meadows.
a.
C.
Install using the “Butt Joint” method and as per manufacturer’s
recommendations.
Bonding compound: The compound shall be a polyvinyl acetate, rewettable type, "Euco
Weld" by The Euclid Chemical Company or "Weldcrete" by The Larson Company.
Structural bonding epoxy adhesive: The compound shall be a two (2) component, 100%
solids, 100% reactive compound suitable for use on dry or damp surfaces, "Euco
Epoxy" #463 or #620 by The Euclid Chemical Company or "Sikadur Hi-Mod" by Sika
Chemical Corporation.
Patching compound: "Euco Epoxy #460 Mortar" by the Euclid Chemical Company or
"Sikadur Lo-Mod" by Sika Chemical Corporation. The compound shall be epoxy type,
100% solids, suitable for use on dry or damp surfaces.
Patching compound (cementitious type): "Thin Coat" by The Euclid Chemical Company
or "Sikatop 122" by Sika Chemical Company.
Abrasive aggregate for nonslip aggregate finish: "Non-Slip" by The Euclid Chemical
Company, "Alundum" by North Company or approved equal.
D.
Non-shrink grout: The grout shall conform to CRD-C-621-80, "Corps of Engineers
specification for Non-Shrink Grout", "Euco NS" by The Euclid Chemical Company or
"Masterflow 713" by Master Builders or an approved equal.
E.
Aggregate/granular base: Section 02 22 00
3.0
EXECUTION
3.1
INSPECTION
A.
Examine the areas and conditions under which work of this Section will be performed.
Correct conditions detrimental to the proper and timely completion of the work. Do not
proceed until unsatisfactory conditions have been corrected.
1.
3.2
Coordinate placement of concrete pads required in Division 16.
CONCRETE PLACEMENT
A.
General: Place concrete in compliance with the practices and recommendations of ACI
304, and as herein specified.
B.
Procedures:
03 30 00 - 4
1.
The Contractor shall notify the Architect-Engineer's representative and testing
laboratory at least one day prior to making any pour.
2.
Install the provided items of other trades, which require being cast-in-place.
Properly locate in cooperation with other trades and secure in position before
concrete is poured. See the Drawings and other Divisions of these Specifications
for the extent, location and details of items to be embedded or placed in concrete.
3.
Concrete shall be placed in forms as nearly as practical in final position, and
worked around reinforcing and into corners of forms with an internal vibrator.
Care shall be taken not to over-vibrate concrete and to keep vibrator off the
reinforcing steel and off the forms.
13-173B
SECTION 03 30 00
CAST-IN-PLACE CONCRETE
3.3
4.
Runways shall be provided for wheeled concrete and handling equipment. Such
equipment shall not be wheeled over reinforcing nor shall runways be supported
on the reinforcing.
5.
Vibration shall not be used to move concrete in a horizontal direction after initial
placement.
6.
Concrete shall not be placed on muddy or frozen ground.
7.
The rate and method of placing concrete and arrangement of construction joint
bulkheads shall be such that the concrete between construction joints shall be
placed in one continuous operation.
8.
Use chutes or tremies for placing concrete where a drop of more than 6 feet is
required.
9.
Do not use concrete which becomes non-plastic and unworkable, or does not
meet the required quality control units, or which has been contaminated by
foreign materials.
10.
Concrete shall have a temperature not below 50oF and not above 85oF during
depositing. Suitable means shall be provided during freezing conditions for
maintaining concrete at a temperature not lower than 70oF for 3 days or 50oF for
5 days after placing. Methods and recommended practice shall be in accordance
with ACI 306 R-78, winter concreting, and ACI 305 R-77 (1982), hot weather
concreting. Admixtures shall not be used without prior approval of the ArchitectEngineer.
11.
Slabs on grade shall be placed on 4 inches compacted thickness of #467 washed
gravel or limestone with a vapor barrier and isolation joints as specified. Install
vapor barrier in accordance with manufacturer's printed directions.
12.
All exposed corners of concrete shall have ¾” X ¾” chamfer. See Section 03 10
00, Item 3.2.E.
13.
Concrete pour stops are to be placed at systematic locations to minimize
cracking.
JOINTS
A.
13-173B
Construction and contraction joints:
1.
Construction joints shall be located in accordance with ACI 301 as directed and
approved by the Architect-Engineer.
2.
If construction joints necessary for the progress of the work are not indicated on
the Drawings, show them in complete detail on the shop drawings.
3.
All reinforcing steel and welded wire fabric shall be continuous across joints,
except for slabs on grade.
4.
Provide keyways at least 1-1/2" deep in all construction joints, in walls, slabs, and
between footing and walls.
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SECTION 03 30 00
CAST-IN-PLACE CONCRETE
B.
5.
For slabs on grade, locate the unindicated joints in a manner to divide the slab
into areas not in excess of 225 SF with one dimension being not greater than
120% of the other dimension.
6.
Prior to resumption of concreting, the surfaces of previously placed concrete shall
be roughened, cleaned and wetted immediately before additional concrete is
placed.
Isolation joints in slabs on grade: Provide isolation joints at points of contact between
slabs on grade and vertical surfaces where indicated and specified herein:
1.
Premolded expansion joint filler
a.
b.
2.
C.
3.4
All exterior slabs where indicated or required
Interior slabs which received floor finish and base
Bond breaker; All interior slabs.
Control joints: Provide control joints on slabs on grade to form panels, patterns or as
indicated on the Drawings and specified herein:
1.
Control joints shall be maximum of 1/4" wide by 1/3" of slab thickness.
2.
Form joint by sawing as soon as concrete has hardened sufficiently to permit
sawing without excessive raveling. Clean each joint thoroughly and cover with
masking tape until concrete is cured.
3.
Fill control joints with self-leveling horizontal joint filler in accordance with
manufacturer's directions.
CONCRETE FINISHING
A.
Finish of formed surfaces:
1.
Rough form finish: Provide as-cast rough form finish to formed concrete surfaces
that are to be concealed in the finish work or by any other construction.
a.
2.
3.
03 30 00 - 6
Standard rough form finish shall be the concrete surface having the texture
imparted by the form facing material used, with tie holes and defective
areas repaired and patched.
Smooth form finish: Provide as-cast smooth form finish for formed concrete
surfaces that are to be exposed to view, or that are to be covered with a coating
material other than cement plaster applied directly to the concrete.
a.
Produce smooth form finish by selecting form material to impart a smooth,
hard, uniform texture and arranging them orderly and symmetrically with a
minimum of seams.
Patch defective areas with cement mortar
immediately after removal of forms.
b.
Provide ¾” X ¾” chamfer on all exposed corners unless indicated on the
Drawings. See Section 03 10 00, Item 3.2.E.
c.
Repair and patch defective areas with all fins and other projections
completely removed and smoothed.
Related unformed surfaces: At tops of walls, horizontal offsets, and similar
unformed surfaces occurring adjacent to formed surfaces, strike off smooth and
finish with a smooth troweled finish.
13-173B
SECTION 03 30 00
CAST-IN-PLACE CONCRETE
3.5
CURING
A.
3.6
General: All concrete shall be cured for a period of not less than 7 days. Freshly placed
concrete shall be protected from premature drying by one of the following methods:
1.
Ponding or continuous sprinkling; provide one person on the job at all times for
this purpose.
2.
Absorptive mat or fabric kept continuously wet.
3.
Sheet material; lap and tape or cement joints and free edges weighted down to
prevent moisture loss.
4.
Liquid curing and sealing compound: Apply in accordance with manufacturer's
directions at a rate of 200 SF/Gal. in a uniform spray. This material shall not be
used on any surface against which additional concrete is to be placed. Curing
compound may only be used on floors receiving additional finishes as approved
by subcontractor responsible for such finishes.
PATCHING
A.
B.
General: After the forms have been removed, all exposed concrete surfaces shall be
inspected. All defective areas, as required by the Architect-Engineer, shall be patched
as herein specified.
1.
Do not fill or patch construction joints unless specifically authorized by the
Architect-Engineer.
2.
Do not patch any concrete in freezing weather.
3.
Chip away defective area to a depth of not less than one inch, with edges
perpendicular to the surface.
4.
Thoroughly apply bonding agent to area to be patched.
5.
A grout, of equal parts of Portland Cement and sand with sufficient water to allow
brushing, shall be brushed into area; followed immediately with patching mix.
6.
The patch shall be of same material as the concrete except the course aggregate
shall be omitted.
7.
The patch mix shall be thoroughly compacted into place and screeded off and
finished to match surrounding surfaces.
Remedial work: Reinforce or replace deficient work as directed by the ArchitectEngineer and at no additional cost to the Owner.
END OF SECTION 03 30 00
13-173B
03 30 00 - 7