Attachment 3 - General Rquirements - DIV_03 30 00 and 03 31 00_0002.pdf

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CAST-IN-PLACE CONCRETE

SECTION 03 30 00

PART 1 - GENERAL

1.1 DESCRIPTION

A. The work of this Section consists of furnishing and performing all operations necessary for the placement of cast-in-place concrete as described in Contract Documents.

1.2 REFERENCES

A. Normal Weight Structural Concrete – Section 03 31 00

B. ACI 301-05: Specifications for Structural Concrete, American Concrete Institute

1.3 SUBMITTALS

PART 2 - PRODUCTS

2.1 MATERIALS

A. Granular Base

1. Base type gravel or crushed rock, graded as follows -

Sieve Size Percent by Weight Passing Sieve

1 inch 100

3/4 inch 85 - 100

No. 4 45 - 60

No. 10 30 - 50

No. 200 5 - 10 (non-plastic)

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B. Concrete

1. Meet requirements specified in Division 03 Section 03 31 00 “Normal Weight Structural

Concrete” for exterior concrete; “unless otherwise noted in the specifications or drawings.”

PART 3 - EXECUTION

3.1 PREPARATION

A. Sub-Base

1. Compact sub-base as specified in Division 31 Utility Excavation & Backfill – Section

31 23 33.

3.2 INSTALLATION

A. Place four (4) inches minimum of the granular base, level, and compact as specified.

B. Joints

1. Scored Control Joints:

a. Spacing, as approved by the Contracting Officer.

b. Depth of control joints shall be approximately one fourth (1/4) of concrete slab thickness, but not less than one (1) inch.

C. Finish

1. Slab and Flatwork:

a. Broom finish as specified by ACI 301 unless noted otherwise in the plans or contract documents.

b. Round edges including edges formed by expansion joints.

c. Remove edger marks

3.3 FIELD QUALITY CONTROL

A. Inspection

1. To allow the Contracting Officer’s verification of grades and elevations, notify the

Contracting Officer three days minimum before placing concrete for specified concrete site elements.

END OF SECTION

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NORMAL WEIGHT

STRUCTURAL CONCRETE

SECTION 03 31 00

NORMAL WEIGHT STRUCTURAL CONCRETE (CA)

PART 1 - GENERAL

1.1 DESCRIPTION

A. The work in this Section includes furnishing and installing cast in place concrete work as described in Contract Documents. For all precast concrete items, refer to specification section

03 40 00, “Precast Concrete Items”.

1.2 REFERENCES

A. American Society for Testing and Materials

1. ASTM C 33-99, 'Standard Specification for Concrete Aggregates'

2. ASTM C 94-98c, 'Standard Specification for Ready-Mixed Concrete'

3. ASTM C 150-98, 'Standard Specification for Portland Cement'

4. ASTM C 260-98, 'Standard Specification for Air-Entraining Admixtures for Concrete'

5. ASTM C 494-98a, 'Standard Specification for Chemical Admixtures for Concrete'

6. ASTM C 618-98, 'Standard Specification for Coal Fly Ash and Raw or Calcined Natural

Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete'

7. ASTM E 1155-96 (2001), ‘Standard Test Method for Determining FF Floor Flatness and

FL Floor Levelness Numbers’

B. "Greenbook Standard Specifications, 2015 or current edition"

1.3 SYSTEM DESCRIPTION

A. Design Requirements

1. Concrete cast in place elements of Project are designed to meet "Greenbook Standard

Specifications, 2015 or current edition" Section 201 – CONCRETE, MORTAR, and

RELATED MATERIALS

a. Mix Type Class (565-C-3250P) three thousand-two hundred fifty (3250) psi

B. Performance Requirements

1. Conform to requirements of ASTM C 94 unless specified otherwise.

2. For testing purposes, the following concrete strengths are required -

a. At seven (7) days: Sixty (60) percent minimum of twenty-eight (28) day strengths

b. At twenty-eight (28) days:

1) Mix Type Class (565-C-3250P) - three thousand-two hundred fifty (3250) psi

2) Alternate Mix Type Class (537-CFW-3250P) - three thousand-two hundred fifty (3250) psi

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1.4 SUBMITTALS

A. As specified in Division 01 Section 01 33 23 “Submittal Procedures.”

B. Quality Assurance/Control

1. Concrete mix design.

2. Delivery Tickets: Require mix plant to furnish delivery ticket for each batch of concrete.

Keep delivery tickets at the job-site for use by the Government or his representatives.

Tickets shall show following:

a. Name of ready-mix batch plant

b. The serial number of ticket

c. Date and truck number

d. Name of Contractor

e. Name and location of Project

f. Specific class or designation of concrete in conformance with that employed in

Project specification

g. Amount of concrete

h. Time loaded

i. Type, name and amount of admixtures used

j. Amount and type of cement

k. Total water content

l. Sizes and weights of sand and aggregate

1.5 PROJECT CONDITIONS

A. Project Environmental Requirements

1. Cold Weather Concreting Procedures:

a. No frozen materials shall be used.

b. Forms, reinforcement, and fillers shall be free from frost. Place no concrete on frozen ground.

c. For temperatures below forty (40) degrees F, maintain concrete at between sixty

(60) and eighty (80) degrees F when placing, and fifty (50) degrees F minimum for five (5) days if regular concrete or at fifty (50) degrees F for three (3) days if high early strength concrete, or longer if determined necessary by the Contracting

Officer.

d. Housing, covering, or other protection shall remain in place for twenty-four (24) hours after heat is discontinued.

2. Hot Weather Concreting Procedures -

a. Maximum concrete temperature allowed is ninety (90) degrees F in hot weather.

b. Cool aggregate and subgrades by sprinkling.

c. Avoid cement over one hundred forty (140) degrees F

d. Use cold mixing water or ice.

e. Use fog spray or evaporation retardant to lessen rapid evaporation from the concrete surface.

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PART 2 - PRODUCTS

2.1 MATERIALS – CAST IN PLACE CONCRETE

A. Portland Cement: Meet requirements of ASTM C 150, Type II.

B. Aggregates

1. Combined Aggregate Grading - Grading C

a. Meet requirements of "Greenbook Standard Specifications, 2015 or current edition" Section 201-1.3.2 Combined Aggregate Gradings which by test or actual service produces concrete of required strength and conforms to local governing codes.

b. Aggregate shall be uniformly graded as follows -

1) All Work

Sieve Size Percent Passing

1-1/2 inch 100

1 inch 95 - 100

3/4 inch 77 - 93

3/8 inch 50 - 70

No. 4 39 - 51

No. 8 31 - 41

No. 16 22 - 32

No. 30 12 - 22

No. 50 3 - 15

No. 100 0 - 5

No. 200 0 - 2

C. Water - Clear, apparently clean, and potable.

D. Admixtures And Miscellaneous

1. Mineral -

a. Fly Ash Pozzolan - Meet requirements of ASTM C 618, Class F or C and with the loss on ignition (LOI) of four (4) and two (2) percent maximum respectively.

2. Chemical -

a. No admixture shall contain calcium chloride nor shall calcium chloride be used as an admixture. All chemical admixtures used shall be from the same manufacturer and compatible with each other.

b. Air Entraining Admixture -

1) Meet requirements of ASTM C 260.

2) Approved Products -

a) Air Mix 200 or AEA-92 by Euclid

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b) Air plus or Super Air Plus by Fritz-Pak

c) MB-VR or MB-AE by Master Builders

d) Sika Air by Sika

e) Daravair or Darex II AEA by W R Grace.

c. Water Reducing Admixture -

1) Meet requirements of C 494, Type A and containing not more than 0.05 percent chloride ions.

2) Approved Products -

a) Eucon WR 75 or Eucon 91 by Euclid

b) FR-2 or FR-3 by Fritz-Pak

c) Pozzolith Normal by Master Builders

d) Plastocrete 160 by Sika

e) Daracem 50/55, WRDA-64, or WRDA-82 by W R Grace.

d. Water Reducing, Retarding Admixture -

1) Meet requirements of ASTM C 494, Type D and contain no more than 0.05 percent chloride ions.

2) Approved Products -

a) Eucon Retarder 75 by Euclid

b) FR-1 or Modified FR-1 by Fritz-PakPozzolith Retarder by Master

Builders

c) Plastiment by Sika

d) Daratard-17 or Daratard-40 by W R Grace.

e. High Range Water Reducing Admixture (Superplasticizer) -

1) Meet requirements of ASTM C 494, Type F or G and containing not more than 0.05 percent chloride ions.

2) Approved Products -

a) Eucon 37 or Eucon 537 by Euclid

b) Supercizer 1 through 7 by Fritz-Pak

c) Rheobuild 1000 by Master Builders

d) Sikament 300 by Sika

e) Darachem-100 or WRDA-19 by W R Grace.

f. Non-Chloride, Non-Corrosive Accelerating Admixture -

1) Meet requirements of ASTM C 494, Type C or E and not contain more chloride ions than are present in municipal drinking water.

2) Approved Products -

a) Accelguard 80 by Euclid

b) Daraset or Polarset by W R Grace.

3. Evaporation Retardant -

a. Approved Products -

1) Sure Film J-74 by Dayton Superior

2) Euco-Bar By Euclid Chemical Co

3) E-Con by L & M Construction Chemicals

4) Confilm by Master BuildersFine:

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2.2 MIXES

A. Submit mix designs to meet the following requirements

1. Proportions -

a. Mix Type Class (565-C-3250P) -

1) Minimum weight cement per cubic yard concrete - five hundred-sixty five

(565) pounds

2) Air Entrainment – four (4) percent, plus or minus one (1) percent

3) Water / Cement Ratio – 0.45 maximum by weight

2. Admixtures -

a. Mix design shall show proposed admixture, amount, usage instructions, and justification for the proposed use. Do not use any admixture without the

Contracting Officer's written approval.

b. Mineral - For Class (537-C-3250P) no fly ash shall be used and or substituted for cement.

c. Chemical -

1) Four (4) inch slump maximum before the addition of high range water reducer.

2) Eight (8) inch slump maximum with the use of high range water reducer

(HRWR).

3) Specified accelerator or retarder may be used if necessary to meet environmental conditions.

d. Mix Type Class (537-CFW-3250P) -

1) Minimum weight cement per cubic yard concrete five hundred-thirty seven

(556.5) pounds and fly ash percent by weight -

2) Air Entrainment – four (4) percent, plus or minus one (1) percent

3) Water / Cement Ratio – 0.45 maximum by weight

3. Admixtures -

a. Mix design shall show proposed admixture, amount, usage instructions, and justification for the proposed use. Do not use any admixture without the

Contracting Officer's written approval.

b. Mineral - For Class (537-CFW-3250P) an amount of specified fly ash equal to fifteen (15) percent of the weight of cement shall be substituted for cement.

Substitution shall consider fly ash with cement in determining amount of water necessary to provide specified water/cement ratio.

c. Chemical -

1) Four (4) inch slump maximum before the addition of high range water reducer.

2) Eight (8) inch slump maximum with the use of high range water reducer

(HRWR).

3) Specified accelerator or retarder may be used if necessary to meet environmental conditions.

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PART 3 - EXECUTION

3.1 PREPARATION

A. Remove water and debris from space to be placed.

3.2 INSTALLATION

A. Site Tolerances

1. ACI Standards shall govern concrete work except where specified differently.

B. Concrete Types

1. Use specified concrete mix types in the following Project elements. If Project elements specified to use Mix Type 1 will be exposed to weather through a winter freeze/thaw season during construction period, use Mix Type 2 for those Project elements.

a. Mix Type Class (537-C-3250P)

1) All concrete elements

b. Alternate Mix Type Class (537-CFW-3250P)

1) All concrete elements

C. Placing

1. Place as soon after mixing as possible. Deposit as nearly as possible in final position.

Placing of concrete shall be continuous until a panel or section is complete.

2. Compact concrete in forms by vibrating and other means where required. Thoroughly work in concrete around reinforcing bars.

3. Do not embed aluminum in concrete.

4. Do not use contaminated, deteriorated, or re-tempered concrete.

5. Avoid accumulation of hardened concrete.

D. Finishing

1. Broom Finishes, Exterior Flatwork Not Specified in “Cast-In-Place Concrete Site

Elements” – Section 03 30 00.

a. Broom finish exterior concrete.

b. Round edges including edges formed by expansion joints.

c. Remove edger marks.

E. Curing:

1. Keep concrete moist seven days minimum for regular concrete and three (3) days for high early strength. Do not use concrete curing compounds without the Contracting

Officer's written approval. Do not use curing compounds to replace moist curing unless accepted in writing by the Contracting Officer at least three (3) days prior to placement of concrete.

2. Concrete curing blankets are to be used to cover the fresh concrete if nighttime temperatures drop below forty (40) degrees F.

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3.3 FIELD QUALITY CONTROL

A. Test for Portland Cement Concrete

1. The contractor will engage a qualified independent testing agency to perform concrete testing indicated below. Payment for these services will be made by Contractor.

2. Take three (3) concrete test cylinders for every one hundred (100) or less cubic yard of each class of concrete placed. Take one (1) additional test cylinder during cold weather concreting, cured on the job site under the same conditions as concrete it represents. At a minimum take three (3) concrete test cylinders for the concrete mat foundation supporting the water tanks and take three (3) concrete test cylinders for the concrete pipe transition thrust block where the above-ground piping transitions to underground piping.

a. Curing: Cure and test cylinders at a laboratory approved by the Contracting

Officer.

b. Test Timing: Test one (1) of each three (3) at seven (7) days and the other two (2) at twenty-eight (28) days.

c. Test Criteria: All testing shall be per "Greenbook Standard Specifications, 2015 or current edition", Section 201-1.1.5

3. All Portland cement concrete delivered and placed shall be sampled and tested in accordance with ASTM C39 testing.

3.4 PROTECTION

A. Protect concrete which has not received its initial set from precipitation to avoid excess water in the mix and unsatisfactory surface finish.

END OF SECTION