COMPLETE REVISION
May 2007
Process Industry Practices
Structural
PIP STS03001
Plain and Reinforced Concrete Specification
PURPOSE AND USE OF PROCESS INDUSTRY PRACTICES
In an effort to minimize the cost of process industry facilities, this Practice has
been prepared from the technical requirements in the existing standards of major
industrial users, contractors, or standards organizations. By harmonizing these technical
requirements into a single set of Practices, administrative, application, and engineering
costs to both the purchaser and the manufacturer should be reduced. While this Practice
is expected to incorporate the majority of requirements of most users, individual
applications may involve requirements that will be appended to and take precedence
over this Practice. Determinations concerning fitness for purpose and particular matters
or application of the Practice to particular project or engineering situations should not
be made solely on information contained in these materials. The use of trade names
from time to time should not be viewed as an expression of preference but rather
recognized as normal usage in the trade. Other brands having the same specifications
are equally correct and may be substituted for those named. All Practices or guidelines
are intended to be consistent with applicable laws and regulations including OSHA
requirements. To the extent these Practices or guidelines should conflict with OSHA or
other applicable laws or regulations, such laws or regulations must be followed.
Consult an appropriate professional before applying or acting on any material
contained in or suggested by the Practice.
This Practice is subject to revision at any time.
© Process Industry Practices (PIP), Construction Industry Institute, The
University of Texas at Austin, 3925 West Braker Lane (R4500), Austin,
Texas 78759. PIP member companies and subscribers may copy this Practice
for their internal use. Changes, overlays, addenda, or modifications of any
kind are not permitted within any PIP Practice without the express written
authorization of PIP.
PRINTING HISTORY
December 1995
July 2001
May 2007
Issued
Complete Revision
Complete Revision
Not printed with State funds
COMPLETE REVISION
May 2007
Process Industry Practices
Structural
PIP STS03001
Plain and Reinforced Concrete Specification
Table of Contents
1. Introduction................................. 2
1.1 Purpose ............................................. 2
1.2 Scope................................................. 2
2. References .................................. 2
2.1 Industry Codes and Standards .......... 2
2.2 Government Regulations................... 3
3. Definitions ................................... 3
4. Requirements.............................. 4
4.1 General .............................................. 4
4.2. Materials ............................................ 7
4.3. Execution ........................................... 8
4.4 Loading of Self-Supporting
Members.......................................... 14
Tables
Table 1 - Tolerances for Embedments
Table 2 - Maximum Sizes of Aggregate
Table 3 - Supplier Data Requirements
Process Industry Practices
Page 1 of 15
PIP STS03001
Plain and Reinforced Concrete Specification
1.
COMPLETE REVISION
May 2007
Introduction
1.1
Purpose
This Practice provides requirements for cast-in-place concrete construction.
1.2
Scope
This Practice describes the technical requirements for furnishing and installing
materials and for proportioning, mixing, placing, testing, and curing of plain and
reinforced concrete.
This Practice supplements ACI 301-05, Specifications for Structural Concrete.
2.
References
Applicable parts of the following Practices, industry codes and standards, and references
shall be considered an integral part of this Practice. The edition in effect on the date of
contract award shall be used, except as otherwise noted. Short titles are used herein where
appropriate.
2.1
Industry Codes and Standards
• American Concrete Institute (ACI)
– ACI 117 - Standard Specifications for Tolerances for Concrete
Construction and Materials
– ACI 211.1 - Standard Practice for Selecting Proportions for Normal,
Heavyweight, and Mass Concrete
– ACI 211.2 - Standard Practice for Selecting Proportions for Structural
Lightweight Concrete
– ACI 301-05 - Specifications for Structural Concrete
– ACI 302.1R - Guide for Concrete Floor and Slab Construction
– ACI 304R - Guide for Measuring, Mixing, Transporting, and Placing
Concrete
– ACI 304.2R - Placing Concrete by Pumping Methods
– ACI 305R - Hot Weather Concreting
– ACI 306R - Cold Weather Concreting
– ACI 306.1 - Standard Specification for Cold Weather Concreting
– ACI 308R - Guide to Curing Concrete
– ACI 347R - Guide to Formwork for Concrete
– ACI 504R - Guide to Sealing Joints in Concrete Structures
– ACI SP-66 - ACI Detailing Manual
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COMPLETE REVISION
May 2007
PIP STS03001
Plain and Reinforced Concrete Specification
• ASTM International (ASTM)
– ASTM A185/A185M - Standard Specification for Steel Welded Wire
Reinforcement, Plain, for Concrete
– ASTM A615/A615M - Standard Specification for Deformed and Plain
Carbon-Steel Bars for Concrete Reinforcement
– ASTM C33 - Standard Specification for Concrete Aggregates
– ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete
– ASTM C150 - Standard Specification for Portland Cement
– ASTM C618 - Standard Specification for Coal Fly Ash and Raw or
Calcined Natural Pozzolan for Use in Concrete
– ASTM C1012 - Standard Test Method for Length Change of HydraulicCement Mortars Exposed to Sulfate Solution
• National Ready Mixed Concrete Association (NRMCA)
– Quality Control Manual - Section 3, Certification of Ready Mixed
Concrete Production Facilities – Plant Certification Check List
2.2
Government Regulations
• U.S. Department of Labor, Occupational Safety and Health Administration
(OSHA)
– OSHA 29 CFR 1926 - Safety and Health Regulations for Construction
3.
Definitions
constructor: The party responsible for supplying the materials, equipment, tools,
supervision, and labor for the installation of the concrete in accordance with the contract
documents. Unless otherwise noted, the term constructor shall apply also to the
constructor’s subcontractor(s) and vendor(s).
contract documents: Any and all documents, including codes, studies, design drawings,
specifications, sketches, practices, and data sheets, that the purchaser or engineer of
record has transmitted or otherwise communicated, either by incorporation or reference,
and made part of the legal contract agreement or purchase order between the purchaser
and the constructor.
engineer of record: Purchaser’s authorized representative with overall authority and
responsibility for the engineering design, quality, and performance of the civil works,
structure, foundations, materials, and appurtenances described in the contract documents.
The engineer of record shall be licensed as defined by the laws of the locality in which
the work is to be constructed, and be qualified to practice in the specialty discipline
required for the work described in the contract documents.
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Plain and Reinforced Concrete Specification
COMPLETE REVISION
May 2007
manufacturer: The party who produces and warrants the performance of the (products,
materials and/or items) provided in accordance with the contract documents. The
(products, materials and/or items) shall:
a. Be manufactured in a controlled process
b. Have standard codes, specifications, tests
c. Possibly include shop drawings to assist in proper application, installation and/or
use
Unless otherwise noted, the term manufacturer shall apply also to the manufacturer’s
subcontractor(s) and/or vendor(s).
owner: The party who has authority through ownership, lease, or other legal agreement
over the (site, facility, structure or project) wherein (what is to be provided or installed)
will be used.
purchaser: The party who awards the contract to the constructor. The purchaser may be
the owner or the owner’s authorized agent.
supplier: The party responsible for supplying concrete materials in accordance with the
contract documents.
4.
Requirements
4.1
General
4.1.1
Concrete supply and construction shall be in accordance with all
requirements of ACI 301-05, except as modified or supplemented in this
Practice or by the contract documents.
4.1.2
The following ACI documents are acceptable practices and may be
helpful in meeting requirements of this Practice and ACI 301:
a. ACI 211.1 - Standard Practice for Selecting Proportions for Normal,
Heavyweight, and Mass Concrete
b. ACI 211.2 - Standard Practice for Selecting Proportions for
Structural Lightweight Concrete
c. ACI 302.1R - Guide for Concrete Floor and Slab Construction
d. ACI 304.2R - Placing Concrete by Pumping Methods
e. ACI 306R - Cold Weather Concreting
f.
ACI 308R - Guide to Curing Concrete
g. ACI 347R- Guide to Formwork for Concrete
h. ACI 504R - Guide to Sealing Joints in Concrete Structures
Page 4 of 15
4.1.3
Requirements of state or local agencies that have jurisdiction where the
concrete is to be placed shall apply.
4.1.4
Any conflicts or inconsistencies between this Practice, the design
drawings, or other contract documents shall be brought to the attention of
the purchaser for resolution.
Process Industry Practices
COMPLETE REVISION
PIP STS03001
Plain and Reinforced Concrete Specification
May 2007
4.1.5
Quality Control
4.1.5.1 A written quality control program and inspection procedures
document shall be submitted to the purchaser for approval. These
documents shall provide details of how compliance with the
requirements of this Practice and contract documents shall be
achieved.
4.1.5.2 Unless otherwise specified in the contract documents, the
purchaser shall be responsible for furnishing a testing agency to
act as the “owner’s testing agency” as defined by ACI 301.
4.1.5.3 The purchaser shall have the right to make inspections at any
time at the source of supply of materials, at the place of
preparation of materials, at the mixing plant if ready mixed
concrete is used, and during execution of all concrete work.
4.1.5.4 Samples for testing shall be obtained in accordance with ACI
301. The rate of sampling shall be in accordance with ACI 301
and the following:
a. For structures and foundations, samples shall be obtained in
accordance with the following requirements:
(1) One sample minimum per 100 cubic yards (76 cubic
meters) of concrete
(2) One sample minimum for each structure or foundation,
except if placing a number of items each smaller than
15 cubic yards (11 cubic meters)
(3) One sample minimum per 15 cubic yards (11 cubic
meters) if placing a number of items each smaller than
15 cubic yards (11 cubic meters)
b. For paving and slabs on grade, obtain one sample per
50 cubic yards (38 cubic meters) of concrete.
c. For underground pipe or electrical encasements and
fireproofing, obtain one sample at the beginning of each day
of concreting work.
d. For all other concrete, obtain samples in accordance with
Section 4.1.5.4.a.
e. Additional samples shall be obtained if observations of
tests for slump, temperature, or air content indicate
nonconformance with the contract documents.
4.1.5.5 For each concrete sample obtained, the following tests shall be
conducted in accordance with ACI 301:
a. Strength tests
b. Slump
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Plain and Reinforced Concrete Specification
COMPLETE REVISION
May 2007
c. Temperature
d. Air content
4.1.5.6 Test cylinder sets shall be dated and numbered consecutively.
4.1.5.7 Unless otherwise specified in the contract documents, concrete
quality assurance test reports shall be provided to the purchaser
weekly. Data in the test report shall include, but not be limited
to, the following:
a. Location of concrete on the job and associated drawing
numbers and structure/foundation identification
b. Specified strength (f ′c)
c. Date poured
d. Proportions of concrete mix or mix identification
e. 7- and 28-day compressive strength
f.
Slump, air and concrete temperatures at time of pour, time of
day concrete was batched, and time of day concrete was
poured
g. Air content
h. Name of inspector making cylinders and cylinder number
4.1.5.8 Where concrete is to be placed in the United States of America,
ready mixed concrete suppliers shall be certified in accordance
with one of the following:
a. Certification by holding a current NRMCA Certificate of
Conformance for Concrete Production Facilities
b. Certification from an independent testing agency stating
conformance with NRMCA Certification of Ready Mixed
Concrete Production Facilities
c. Certification from the State Department of Transportation
from the state of the project site location
The certifications shall be current for the duration of the concrete
supply.
4.1.6
Submittals
4.1.6.1 Before the start of work, documentation in accordance with the
requirements of ACI 301 which is listed in Table 3, as a
minimum, shall be submitted to the purchaser for review and
approval.
4.1.6.2 If required by the contract documents, additional documentation
in accordance with the requirements of ACI 301 which is not
listed in Table 3 shall be submitted to the purchaser for review
and approval.
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PIP STS03001
Plain and Reinforced Concrete Specification
May 2007
4.1.7
Safety
The work shall be in accordance with all applicable national, state, or
local safety requirements, site specific requirements of the purchaser, and
all safety requirements specified in the contract documents.
4.2.
Materials
4.2.1
General
4.2.1.1 Unless authorized in writing by the purchaser, materials that are
not in accordance with this Practice or the contract documents
shall not be permitted.
4.2.1.2 Materials shall be in accordance with applicable local volatile
organic compound regulations.
4.2.2
Cementitious Materials
4.2.2.1 Unless otherwise specified in the contract documents, Portland
cement shall be in accordance with ASTM C150, Type I or
Type II.
4.2.2.2 Only one brand of cement shall be used.
4.2.2.3 Unless otherwise specified in the contract documents, fly ash
may be used in accordance with ACI 301 and shall conform to
ASTM C618, Class C or Class F. If Class C fly ash is used in a
moderately to extremely aggressive sulfate environment, the mix
design shall be tested in accordance with ASTM C1012 to verify
sulfate resistance. (Note: Class C fly ash, which contains
relatively high levels of amorphous calcium aluminate, may
make more calcium hydroxide available for reaction with
sulfates, thus contributing to concrete deterioration.)
4.2.3
Admixtures
4.2.3.1 All admixtures, except air entrainment admixtures, shall require
the engineer of record’s authorization for use.
4.2.3.2 Only one manufacturer for each admixture shall be used.
4.2.3.3 Calcium chloride and admixtures containing soluble chlorides
shall not be permitted.
4.2.4
Aggregate
4.2.4.1 Aggregate shall be in accordance with ASTM C33.
4.2.4.2 Aggregate shall be obtained from a single source.
4.2.5
Reinforcement
4.2.5.1 Unless otherwise specified in the contract documents,
reinforcing bars shall be deformed billet steel in accordance with
ASTM A615/A615M, grade 60.
4.2.5.2 Unless otherwise specified in the contract documents, all
reinforcing shall be uncoated.
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Plain and Reinforced Concrete Specification
COMPLETE REVISION
May 2007
4.2.5.3 Welded wire fabric shall be plain wire fabric and in accordance
with ASTM A185/A185M.
4.2.5.4 Tie wire shall be black annealed wire, 16 gage minimum.
4.2.6
Water
4.2.6.1 Water used for mixing water, ice, curing, or any other function
relating to placement of concrete shall be potable.
4.2.6.2 Other water may be used if tested for suitability in accordance
with ASTM C94/C94M.
4.2.6.3 Wash water from mixer washout operations shall not be used as
mixing water.
4.2.7
Accessories
All accessories shall be provided in accordance with the contract
documents.
4.3
Execution
4.3.1
General
Storage, handling, measuring, mixing, transporting, and placing of
concrete materials shall follow the methods and means outlined in ACI
304R and comply with manufacturer’s recommendation for handling,
storage, and protection.
4.3.2
Formwork
4.3.2.1 Unless otherwise specified in the contract documents, 3/4-inch
(20-millimeter) chamfer strips shall be provided at all corners on
permanently exposed surfaces.
4.3.2.2 Form-release agents shall not be applied if concrete surfaces
shall receive special finishes or where the agent may affect
applied coverings. Alternately, inside surfaces of untreated
formwork shall be soaked with clean water and kept moist before
placing concrete.
4.3.2.3 Form removal shall be in accordance with ACI 301 and the
following:
a. For structures for which the forms do not provide vertical
support (e.g., footings, piers, columns, walls, or sides of
beams), the forms may be removed 48 hours after
completion of placement if the concrete is sufficiently hard
to prevent damage by form removal, and if curing starts
immediately.
b. Unless otherwise specified in the contract documents, forms
for self-supporting members may be removed if the concrete
strength is at least 80 percent of the specified 28-day
strength. Refer to ACI 301-05, Section 2.3.4, for determining
strength of concrete for removal of formwork.
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PIP STS03001
Plain and Reinforced Concrete Specification
May 2007
c. Unless otherwise approved by the purchaser, forms shall not
be left permanently in place.
4.3.2.4 Form accessories that remain embedded in the concrete (e.g., ties
and hangers) shall be a commercially manufactured type.
4.3.2.5 Unless specified otherwise in the contract documents, formed
concrete surfaces shall be constructed in accordance with the
tolerances shown in ACI 117. Tolerances for concrete surfaces
not specifically mentioned in ACI 117 shall be in accordance
with ACI 117, Section 4.
4.3.2.6 Formwork for column and wall shall be provided with adequate
cleanout openings to permit inspection and easy cleaning after
reinforcement has been placed.
4.3.2.7 All side and bottom surfaces of structures that will be exposed
shall be formed. Unless otherwise approved by the engineer of
record, vertical surfaces of subgrade structures and pavements
shall be formed at least to a depth of 300 mm (12 inches) below
grade. The structure below this level may be placed against
earth.
4.3.3
Joints
4.3.3.1 All joints shall be located and constructed in accordance with the
contract documents. Any variation from the location specified
shall be approved by the purchaser.
4.3.3.2 Control joints to be cut with a saw shall be cut as soon as the
concrete is hard enough to prevent surface raveling and
aggregate dislodging, and within 12 hours after concrete
placement.
a. Control joints shall be cut in accordance with the saw
manufacturer’s written recommendations.
b. Sawing sequence shall be based on pour time and size of
slab.
4.3.3.3 Control joints in slab toppings shall be located directly above
and in line with the control joints in the underlying concrete slab.
4.3.3.4 Isolation joints shall be placed where the pavement adjoins
vertical surfaces (e.g., walls, columns, catch basins, manholes,
and equipment foundations). Isolation joints shall be located in
accordance with the contract documents.
4.3.3.5 Dowels at expansion joints shall be properly aligned to prevent
any restraint on expansion movement at the joint.
4.3.3.6 The surface of joints shall be cleaned of scale and laitance and
thoroughly wetted, but free of standing water, before placing
adjoining concrete.
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PIP STS03001
Plain and Reinforced Concrete Specification
4.3.4
COMPLETE REVISION
May 2007
Waterstops
Waterstops shall be installed in accordance with the contract documents
and the manufacturer’s recommendations.
4.3.5
Reinforcing and Embedments
4.3.5.1 Detailing and Fabrication
1. Reinforcement placing drawings and bending schedules shall
be prepared in accordance with ACI SP-66. Drawings and
schedules shall show number, grade, size, length, mark,
location, and bending diagrams for reinforcing bars.
2. Splices in reinforcement shall be detailed, fabricated, and
located as shown on the drawings only.
3. Fabrication drawings shall indicate the related PO number,
release number, and design drawing number.
4. Reinforcement shall be tagged with weather-resistant metal
tags.
5. Each bundle of fabricated bars shall be tagged. The tags shall
indicate drawing number, release number, mark number,
grade, bar quantity, and bar size.
6. Each bundle of stock-length straight bars shall be tagged to
indicate bar quantity, grade, bar size, and bar length.
7. Fabrication tolerances shall comply with the requirements of
ACI 117.
4.3.5.2 Installation
1. Embedded aluminum items shall not be permitted.
2. Anchor bolts, anchors, inserts, sleeves, drains, curb and seat
angles, nosing, and other embedded items shall be installed
before placing concrete. Welding of these items to the
reinforcing bars shall not be permitted.
3. Anchor bolt threads shall be protected from damage and kept
free of concrete.
4. Anchor bolt sleeves shall be capped or plugged to keep out
water, concrete, and debris.
5. Reinforcing bars shall be spliced in accordance with the
design drawings only. Unless otherwise approved by the
engineer of record, welded or mechanical splices shall not be
permitted.
4.3.5.3 Tolerances
Unless otherwise specified in the contract documents,
embedments shall be installed in accordance with the tolerances
shown in Table 1. The term “bolt group” used in Table 1 is
defined as the set of anchor bolts for a single fabricated steel
shipping piece, or a single piece of equipment or skid.
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PIP STS03001
Plain and Reinforced Concrete Specification
May 2007
Table 1 – Tolerances for Embedments
Measurement
4.3.6
Tolerance
Anchor bolt projection
+ 1/4 inch (6 mm), – 0.00 inch (0 mm)
Center of bolt group
+ or – 1/4 inch (6 mm)
Center to center of any two anchor
bolts within a bolt group
+ or – 1/8 inch (3 mm)
Center to center between bolt groups
+ or – 1/4 inch (6 mm)
Anchor bolt plumbness
1/8 inch in 3 feet (4 mm in 1 meter)
Plate insert horizontal and vertical
location
+ or – 1/4 inch (6 mm) horizontal and
+ or – 1/32 inch (1 mm) vertical
Proportioning and Mixing
4.3.6.1 The minimum 28-day compressive strength, f ′c, shall be in
accordance with the contract documents.
4.3.6.2 If high early-strength concrete is specified, compressive strength
shall be 7-day strength.
4.3.6.3 Unless otherwise specified in the contract documents, the
maximum size of coarse aggregate in concrete shall be in
accordance with ACI 301 and shall not be greater than the sizes
shown in Table 2.
Table 2 – Maximum Sizes of Aggregate
Type of Construction
Maximum Size
Slabs and walls less than 8 inches thick
3/4 inch (20 mm)
Lightweight concrete
3/4 inch (20mm)
Liquid retaining structures
3/4 inch (20 mm)
Underground pipe or electrical encasements
3/4 inch (20 mm)
Structures (beam and column construction)
3/4 inch (20 mm)
Fireproofing or structural steel encasements
3/8 inch (10 mm)
All other items
1-1/2 inch (40 mm)
4.3.6.4 Unless otherwise specified in the contract documents, maximum
water-soluble chloride ion concentrations in hardened concrete
shall be 0.30% by weight of cement, in accordance with
ACI 301-05, Table 4.2.2.6, for “Other reinforced concrete
construction.”
4.3.6.5 Unless otherwise specified in the contract documents, air content
at the point of delivery shall be in accordance with ACI 301-05,
Table 4.2.2.4, for moderate exposure.
4.3.6.6 Unless otherwise specified in the contract documents, the
maximum water-cementitious materials ratio shall be 0.4 for
liquid-retaining (hydraulic) structures and 0.5 for all other
concrete.
4.3.6.7 Unless otherwise directed by the engineer of record, all
admixtures shall be added at the batch plant.
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COMPLETE REVISION
May 2007
4.3.6.8 Concrete envelopes for underground electrical ducts and cover
slabs for direct-buried cables shall have a specified 28 day
compressive strength of 2,000 psi (14 MPa) and be colored red
by adding 10 pounds of red oxide powder per cubic yard
(6 kilograms per cubic meter) of concrete unless otherwise noted
in the contract documents.
4.3.6.9 Concrete envelopes for underground instrument air-line ducts
shall have a specified 28 day compressive strength of 2,000 psi
(14 MPa) and be colored yellow by adding 10 pounds of yellow
oxide powder per cubic yard (6 kilograms per cubic meter) of
concrete unless otherwise noted in the contract documents.
4.3.6.10 Unless otherwise approved by the purchaser, job-mixed
concrete shall not be permitted.
4.3.7
Placing Concrete
4.3.7.1 Inspection and authorization shall be obtained from the
purchaser before placing concrete.
4.3.7.2 Concrete delivery tickets shall be maintained as a record for
ready mixed concrete.
4.3.7.3 Concrete that has achieved initial set or has been contaminated
by foreign matter shall not be deposited in the structure.
4.3.7.4 Retempering or addition of water after concrete is first mixed
shall not be permitted.
4.3.7.5 The addition of ice at the construction site shall be permitted
only if it has been considered in the mix design. The concrete
manufacturer shall provide written instructions on the required
amount of ice and the mixing procedure.
4.3.7.6 Materials and equipment for protection and curing shall be
operational at the placement site before placement begins.
4.3.7.7 Slabs shall be placed in alternating strips.
4.3.7.8 The interval between concrete deliveries shall be such that no
more than 20 minutes interruption elapse during placement of a
single foundation or slab, unless approved by the engineer of
record.
4.3.7.9 Discharge of the concrete shall be completed within 45 minutes
after the introduction of the mixing water to the cement and
aggregates or the introduction of the cement to the aggregates.
This time may be extended up to 90 minutes with approval of the
engineer of record.
4.3.8
Curing and Protection
4.3.8.1 Unless otherwise specified in this Practice or in the contract
documents, concrete shall be cured and protected in accordance
with ACI 301-05, Section 5.3.6.
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PIP STS03001
Plain and Reinforced Concrete Specification
May 2007
4.3.8.2 Concrete not in contact with forms may utilize any of the
methods indicated in ACI 301-05, Section 5.3.6.4, for the
preservation of moisture. However, for interior concrete slabs,
ponding, sprayed water, or wet sand shall not be permitted.
4.3.8.3 Unless otherwise specified in the contract documents, liquid
membrane curing compounds shall not be used on surfaces that
shall receive bonded treatments, tiles, paint or other adhered
finishes, epoxy toppings, or additional concrete.
4.3.8.4 Hydraulic (Liquid-Tight) Structures
Any structure designated as a hydraulic structure in the contract
documents shall comply with the following:
1. Hydraulic structures shall be cured by a wet-cure procedure
only (e.g., use of ponding, sprinkling, or a moisture-retaining
fabric).
2. Moist wood forms in contact with concrete shall not be
considered as curing for hydraulic structures.
3. Curing shall occur for a minimum of 14 days.
4. Wall forms shall be loosened and water continually
sprinkled between the wall and forms.
4.3.9
Surface Finishing and Tolerances
4.3.9.1 Unless otherwise specified in the contract documents, the surface
finish and correlating tolerance requirements shall be in
accordance with ACI 301.
4.3.9.2 Equipment bases shall be finished with a floated finish. Stairs,
steps, ramps, and walks shall be finished with a broom finish.
4.3.9.3 Interior floor slabs shall be finished with a trowel finish in
accordance with the conventional flat tolerance requirements of
ACI 117.
4.3.9.4 Roads, area paving, and exterior slabs shall be finished with a
broom or belt finish in accordance with the conventional
straightedged tolerance requirements of ACI 117.
4.3.10 Repair of Surface Defects
4.3.10.1 Unless otherwise specified or permitted by the engineer of
record, tie holes, honeycombs, and other concrete surface
defects shall be repaired promptly after form removal at a time
and in a manner that shall not delay, interfere with, or impair
the proper curing of the fresh concrete.
4.3.10.2 The engineer of record shall be notified before proceeding with
repair if the defect is either of the following sizes:
a. Depth is greater than 3 inches (75 mm) at the maximum
point and surface area is greater than 150 square inches
(100,000 square mm).
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COMPLETE REVISION
May 2007
b. Depth is greater than 1/4 the thickness of the member and
greater than 6 inches (150 mm) in any other direction.
4.3.10.3 Prepackaged grouts and patching compounds or a patching
mortar similar to the concrete mix without coarse aggregate
may be used with approval from the engineer of record. The
color shall match the surrounding area.
4.3.10.4 Out-of-tolerance slabs shall be repaired by grinding down high
points and/or raising low points by using a specified
underlayment compound or repair topping if the areas are
exposed.
4.3.10.5 Critical slab areas, identified in the contract documents shall be
replaced if out-of-tolerance. A demolition and replacement plan
for the slab areas shall be submitted to the engineer of record
for review and approval before proceeding.
4.3.11 Hot and Cold Weather Concreting
4.3.11.1 If the combination of temperature, humidity, and wind velocity
as shown in ACI 305R, Figure 2.1.5, is expected to cause a rate
of evaporation equal to or greater than 0.2 pounds per square
foot per hour (9.6 newtons per square meter per hour), the
recommendations of ACI 305R shall be followed for concrete
supply and construction.
4.3.11.2 If the minimum temperature criteria of ACI 301-05,
Section 4.2.2.8, applies, the requirements of ACI 306.1 shall be
followed for concrete supply and construction.
4.3.12 Architectural and Prestressed Concrete
Architectural and prestressed concrete requirements that are in addition
to ACI 301 and this Practice shall be in accordance with the contract
documents.
4.4
Loading of Self-Supporting Members
Unless otherwise approved by the engineer of record, no superimposed load shall
be applied to self-supporting members before the 28-day verification of the
specified strength, unless the specified 28-day strength has been verified by fieldcured cylinders.
Page 14 of 15
Process Industry Practices
COMPLETE REVISION
PIP STS03001
Plain and Reinforced Concrete Specification
May 2007
Table 3 – Supplier Data Requirements
Type of Submittal
For
Approval
Supplier's QA Program
For
Record
When Required
Weekly
X
Batch Plant and Truck
Mixer Certification
Remarks
After
Before
With RFQ
Notice to Fabrication Submittal
Proceed
X
X
X
Mix Designs
X
X
Trial Batch Qualification
Test Results
X
X
Cement Certifications
X
X
Mineral Additive
Certifications
X
X
Fine and Coarse
Aggregate Certifications
X
X
Admixture Certifications
X
X
Material Suppliers,
Sources, and
Certifications
X
X
Manufacturer Spec's,
Certifications and
Installation Instructions
X
X
Proposed Curing Methods
X
X
Reinforcing Bending
Schedule and Placing
Drawings
X
Certified Mill Test Reports
for each bar size and heat
number
X
Epoxy Coating Inspection
Reports
X
Delivery Ticket
X
Compression Test
Reports
X
Compression Breaks
500 psi (3500 KPa) or
more below required
X
Water Testing Reports
X
Process Industry Practices
If applicable
7 days
7 days
X
If requested
If applicable
With delivery
X
Same day
submittal
10 days
If applicable
Page 15 of 15