W912P5-14-R-0003TspecsAm7Pgs.pdf

Auxiliary Dam Reinforcing Berm Center Hill Reservoir and Left Rim Stabilization DeKalb County, Tennessee

ASTM C123/C123M (2014) Standard Test Method for Lightweight Particles in Aggregate

ASTM C1260 (2014) Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method)

ASTM C127 (2015) Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate

ASTM C128 (2015) Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate

ASTM C1293 (2008b) Standard Test Method for Determination of Length Change of Concrete Due to Alkali- Silica Reaction

ASTM C131/C131M (2014) Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C136 (2006) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM C138/C138M (2014) Standard Test Method for Density ("Unit Weight"), Yield, and Air Content (Gravimetric) of Concrete

ASTM C142/C142M (2010) Standard Test Method for Clay Lumps and Friable Particles in Aggregates

ASTM C143/C143M (2012) Standard Test Method for Slump of Hydraulic-Cement Concrete

ASTM C1435/C1435M (2014) Standard Practice for Molding Roller-Compacted Concrete in Cylinder Molds Using a Vibrating Hammer

ASTM C150/C150M (2015) Standard Specification for Portland Cement

ASTM C1567 (2013) Standard Test Method for Potential Alkali-Silica Reactivity of Combinations of Cementitious Materials and Aggregate (Accelerated Mortar-Bar Method)

ASTM C172/C172M (2014a) Standard Practice for Sampling Freshly Mixed Concrete

ASTM C231/C231M (2014) Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

ASTM C260/C260M (2010a) Standard Specification for Air-Entraining Admixtures for Concrete

SECTION 03 37 23 Page 7 W912P5-14-R-0003 Amendment No. 0007

ASTM C294 (2012) Standard Descriptive Nomenclature for Constituents of Concrete Aggregates

ASTM C295/C295M (2012) Petrographic Examination of Aggregates for Concrete

ASTM C31/C31M (2012) Standard Practice for Making and Curing Concrete Test Specimens in the Field

ASTM C33/C33M (2013) Standard Specification for Concrete Aggregates

ASTM C39/C39M (2015a) Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens

ASTM C40/C40M (2011) Standard Test Method for Organic Impurities in Fine Aggregates for Concrete

ASTM C451 (2013) Standard Test Method for Early Stiffening of Hydraulic Cement (Paste Method)

ASTM C494/C494M (2013) Standard Specification for Chemical Admixtures for Concrete

ASTM C511 (2013) Standard Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes

ASTM C535 (2012) Standard Test Method for Resistance to Degradation of Large-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C566 (2013) Standard Test Method for Total Evaporable Moisture Content of Aggregate by Drying

ASTM C597 (2009) Pulse Velocity Through Concrete

ASTM C618 (2012a) Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

ASTM C666/C666M (2015) Resistance of Concrete to Rapid Freezing and Thawing

ASTM C803/C803M (2003; R 2010) Penetration Resistance of Hardened Concrete

ASTM C805/C805M (2013a) Rebound Number of Hardened Concrete

ASTM C87/C87M (2010) Effect of Organic Impurities in Fine Aggregate on Strength of Mortar

ASTM C88 (2013) Standard Test Method for Soundness

SECTION 03 37 23 Page 8 proportioning studies are available for review in the District office.

Tables 1-1, 1-2, and 1-3 below show the application(s) of each mixture, along with required mixture properties and proportions. Preliminary mixture proportions provided in Table 1-3 below are subject to adjustment by COR as needed prior to and during construction to ensure concrete properties are suitable. Preliminary mixture proportions in this table are not contract requirements, but are provided to inform Contractor of anticipated proportions so that equipment can be sized accordingly. Final mixture proportions will be determined during TRIAL BATCHING.

Table 1-1 - Mixture Applications

Mixture Name Applications

RCC RCC Berm, Downstream Apron

RCC Facing (Air-Entrained Conventional Concrete)

Crest, Horizontal and Vertical Surfaces of Downstream Face, Some Portions of the Apron, around

Waterstops, Horizontal and Vertical Surfaces of Non-Overflow Sections

Bedding Mortar Part of Cold Joint Treatment, As Required Between RCC Lift Surfaces, Between RCC and Mud Mat Grout (for GERCC) Around Waterstops, Abutment Contacts

Miscellaneous (Non Air-Entrained)

Conventional Concrete

Dental Work, Mud Mats, Gallery Floor, Gallery Stairs, Gallery Gutter, Gallery Ceiling

Table 1-2 - Mixture Properties

Mixture Name Air Content

Density (pcf)

Slump (in)

Vebe (sec)

Flow (sec)

Strength (psi)

NMSA

(in)

Max w/c

RCC < 1.5

(entrapped)

148-160 N/A 15-20 N/A 2000 @ 90 days

1 1/2 0.5

RCC Facing 4.0-6.0 144-156 2-4 N/A N/A 3500 @ 28 days

1 1/2 0.35

Bedding Mortar

3.5 +/- (entrapped)

135-150 8-11 N/A N/A 3500 @ 90 days

No. 4 Sieve

0.6

Grout N/A 104-118 N/A N/A 10-15 3500 @ 90 days

N/A 0.35

Miscellaneous Conventional

5.0-7.5 144-156 3-6 N/A N/A 3000 @ 28 days

3/4 0.45

SECTION 03 37 23 Page 11

Table 1-3 - Anticipated Mixture Proportions

Mixture Name

Water Content (pcy)

Portland Cement Content (pcy)

Fly Ash

Content (pcy)

D-Base Size

Limestone Fine

Aggregate (pcy)

# 4 C.A.

Content (pcy)

# 67 C.A.

Content (pcy)

Concrete Quartz Sand F.A.

Content (pcy)

Type-D

WRA

(oz/cwt)

AEA

(oz/ cwt)

RCC 150-

125-175 125-175 1650-

625-

375-

450-

8-12 N/A

RCC

Facing

225-

325-450 150-200 N/A 1000-

650-

975-

5-7 0.5- 0.75

Bedding Mortar

350-

250-425 250-425 N/A N/A N/A 2300-

5-7 TBD

Grout 850-

1000-

1000-

N/A N/A N/A N/A As Needed Government Directed

TBD

Misc.

Concrete

TBD TBD 30-50% N/A N/A TBD TBD TBD TBD

*N/A - Not Applicable **TBD - To be determined by Contractor to meet properties specified above

1.2.2 Proportioning Responsibility

1.2.2.1 Government Responsibility

The proportions of all materials entering the RCC, RCC facing, bedding mortar, and grout will be furnished by the Government. The Contractor is responsible to monitor aggregate and sand moisture content and properly adjust the directed mix proportions at batching to ensure the mix has the appropriate free water content and mix design yield. If the mix proportions need to be adjusted for any other reason, the proportions will be changed as necessary by the Government. Field adjustments will be directed by the Government, as needed to the batch weights, to maintain the necessary consistency and wet concrete properties to allow full compaction and prevent segregation. Changes by the Government to batch weights include, but are not limited to: cement, pozzolan, aggregate, admixture dosage, and water content. Frequent changes to these batch weights shall be considered usual and can be expected to be made during the course of each day's placement.

1.2.2.2 Contractor Responsibility

a. The proportions of the Miscellaneous Conventional Concrete shall be the responsibility of the Contractor. The Contractor shall perform the necessary mixture proportioning study to demonstrate the Miscellaneous Conventional Concrete meets the requirements of the specifications and is appropriate for the intended application. The Miscellaneous Conventional Concrete shall have a maximum water to cementitious materials ratio of 0.45 by weight. Cementitious materials content is defined as the cement content plus the fly ash content. The Contractor shall submit the final mixture design that shows the proportions to be used.

SECTION 03 37 23 Page 12