Instructions to Offerors.pdf

REQUIREMENT

Item No. Description Unit Est. Q'ty

0001 Concrete 650 psi Flexural strength 25mm (1") nominal max aggregate size, 75mm (3") slump

CM 1,038

Total:

1. SPECIFICATIONS:

IAW Specifications found in SOW Para 1

2. DELIVERY INFORMATION:

Delivery Time: 0700-1600, MON – FRI Delivery Period: From 19 MAY 2021 to 2 JUN 2021 Minimum Quantity: Delivery will be ordered in approximately 459 cubic meter (600 cubic yard) increments per call. Quantities may vary depending on the call from the project manager.

Delivery Location: Items shall be delivered to Daegu K2 Air Base, Republic of Korea no later than 3 days after receipt and acknowledgment of each call. Daegu (K-2) Air Base flight line access gate located near building 5006 (See drawings in SOW) Point of Contact:

Primary POC: Capt Jankowski at christopher.jankowski.5@us.af.mil (COMM) 0503-366- Alternate POC: TSgt Elauria, John at john.elauria@us.af.mil

QUATATIONS INFORMATION

ADDENDUM TO FAR 52.212-1, INSTRUCTIONS TO THE OFFEROR(S)

1. The quotation with item description must be conforming to the requirement, and must be submitted to SAM.beta.Gov at (https://beta.sam.gov ) The electronic proposal shall be submitted by 1800 hrs (Korea Standard Time) on the closing date of he RFQ. The Government requests all questions be emailed to kesha.s.mcgee2.mil@mail.mil within three (3) days after the solicitation is issued.

The quotation submitted other than SAM.BETA.GOV will not be considered for award.

If Sam.beta.Gov is not available, email to kesha.s.mcgee2.mil@mail.mil with the evidence document such as screen shot. The SAM.BETA.GOV unavailability is limited to ONLY SAM.BETA.GOV server problem not individual failure/problem.

2. Proposal Preparation Instructions. The offeror quotation must demonstrate a clear understanding of the solicitation requirement. Failure to provide a complete proposal may reflect lack of understanding of the requirements and may result in a determination that the offeror is technically unacceptable.

3. The offeror(s) shall submit the following requirements IAW para. 1 above.

a. Price Schedule: The offerors shall submit a completed pricing schedule.

b. Technical Proposal: Specification for the proposed items.

Failure to submit the above requirements may be grounds for determining the proposal to be non- compliant to the RFQ and ineligible for contract award.

4. Clause 5152.204-4032, FAR 52.212-1, 2 and 3: The terms “Quotation” and “Quoter” shall be substituted for “Offer” and “Offeror.”

BASIS OF AWARD

The Government will award a contract resulting from this solicitation to the responsible offeror having submitted the lowest-priced, technically acceptable offer that satisfies all terms and conditions of this solicitation. The following factors shall be used to evaluate quotations:

Factor A : Price Schedule - The lowest price for award purposes will be the total of all CLIN prices.

Factor B : Technical - Item(s) shall meet the specifications of each proposed items. To be determined technically acceptable, the submitted specification must meet the Government requirement as stated in this solicitation.

Note: To be determined responsible, a prospective contractor must meet FAR 9.104-1 General standards.

SHIPPING/PAYMENT INFORMATION

ADDENDUM TO FAR 52.212-4 CONTRACT TERMS AND CONDITIONS— COMMERCIAL ITEMS

DELIVERY/PAYMENT INFORMATION

DELIVERY INSTRUCTIONS:

a. Calls shall be placed by the Project Manager/COR to order airfield concrete in accordance with the Statement of Work. The vendor agrees to deliver the quantity ordered per call within 3 days after receiving and acknowledging the call. Each call shall be logged/recorded as to the time and date of the call and verified by the Project Manager/COR prior to delivery.

b. The vendor agrees to provide delivery of concrete to Daegu K2 AB.

2. RECEIVING OFFICER: TSgt Elauria, John, john.elauria@us.af.mil , Daegu K2 Air Base, Republic of Korea

3. TIME OF DELIVERY: Items shall be delivered to Daegu K2 Air Base, Republic of Korea no later than 3 days after receipt and acknowledgment of each call.

*Delivery will be ordered in approximately 459 cubic meter (600 cubic yard) increments per call. Quantities may vary depending on the call from the project manager.

1. DESCRIPTION OF SERVICES

The contractor will provide delivery of 1038 Cubic Meters (1358 Cubic Yards) of airfield concrete to Daegu K-2 Air Base, Daegu, Republic of Korea. Contractor shall provide concrete made from approved materials, and follow all specifcations shown below, and all applicable UFC and UFGS guidance. All concrete placement in the formwork will be done by government labor. Any delivery not meeting the specification at time of delivery shall be rejected at contractor’s cost

1.1 CEMENTITIOUS MATERIALS

Provide cementitious materials consisting of portland cement, or only portland cement in combination with supplementary cementitious materials (SCM), that conform to appropriate specifications listed below. New submittals are required when the cementitious materials sources or types change.

1.1.1 Portland Cement

Provide portland cement conforming to ASTM C150/C150M, Type I, II, low alkali cement.

1.1.2.1 Fly Ash

If fly ash is used, provide fly ash that conforms to ASTM C618, Class F, including the requirement for uniformity and effectiveness in controlling Alkali-Silica reaction with a loss on ignition not exceeding 6 percent. Provide Class F fly ash for use in mitigating Alkali-Silica Reactivity with a total equivalent alkali content less than 3 percent.

1.1.2.2 Raw or Calcined Natural Pozzolan

If pozzolan is used, provide natural pozzolan that is raw or calcined and conforms to ASTM C618, Class N, including the optional requirements for uniformity and effectiveness in controlling Alkali-Silica reaction with a loss on ignition not exceeding 6 percent. Provide Class N pozzolan for use in mitigating Alkali-Silica Reactivity with a total equivalent alkali content less than 3 percent.

1.1.2.3 Ultra Fine Fly Ash and Ultra Fine Pozzolan

If these materials are used, provide Ultra Fine Fly Ash (UFFA) and Ultra Fine Pozzolan (UFP) that conforms to ASTM C618, Class F or N, and the following additional requirements:

a. The strength activity index at 28 days of age of at least 95 percent of the control specimens.

b. The average particle size not exceeding 6 microns.

1.1.3 Slag Cement

If this material is used, provide slag cement (ground-granulated blast-furnace slag) that conforms to ASTM C989/C989M, Grade 120.

1.1.4 Supplementary Cementitious Materials (SCM) Content

Use of one of the SCMs listed below is optional, unless the SCM is required to mitigate ASR.

TABLE 1:SUPPLEMENTARY CEMENTITIOUS MATERIALS CONTENT

Supplementary Cementitious Material

Minimum Content (percent)

Maximum Content (percent)

Class N Pozzolan and Class F Fly Ash

SiO2 + A12O3 + Fe2O3 > 80 percent

20 35

SiO2 + A12O3 + Fe2O3 > 90 percent

15 35

UFFA and UFP 7 16 Slag Cement 40 06

1.2 AGGREGATES

1.2.1 Aggregate Sources

1.2.1.1 Durability of Coarse Aggregate

Evaluate and test all fine and coarse aggregates to be used in all concrete for durability in accordance with ASTM C88. Provide fine and coarse aggregates with a maximum of 18 percent loss when subjected to 5 cycles using Magnesium Sulfate or a maximum of 12 percent loss when subjected to 5 cycles if Sodium Sulfate is used.

1.2.1.2 Alkali-Silica Reactivity

Evaluate and test fine and coarse aggregates to be used in all concrete for alkali-aggregate reactivity. Test all size groups and sources proposed for use.

a. Evaluate the fine and coarse aggregates separately, using ASTM C1260.

Reject individual aggregates with test results that indicate an expansion of greater than 0.08 percent after 28 days of immersion in 1N NaOH solution, or perform additional testing as follows: utilize the proposed low alkali portland cement, blended cement, and SCM, or Lithium Nitrate in combination with each individual aggregate. If only SCMs are being evaluated, test in accordance with ASTM C1567. If Lithium Nitrate is being evaluated, with or without SCMs, test in accordance with COE CRD-C 662. Determine the quantity that meets all the requirements of these specifications and that lowers the expansion equal to or less than 0.08 percent after 28 days of immersion in a 1N NaOH solution. Base the mixture proportioning on the highest percentage of SCM required to mitigate ASR-reactivity.

b. If any of the above options does not lower the expansion to less than

0.08 percent after 28 days of immersion in a 1N NaOH solution, reject the aggregate(s) and submit new aggregate sources for retesting.

Submit the results of aggregate testing for evaluation and acceptance.

1.2.1.3 Combined Aggregate Gradation

In addition to the grading requirements specified for coarse aggregate and for fine aggregate, provide the combined aggregate grading meeting the following requirements:

a. Provide materials selected and the proportions used such that when the Coarseness Factor (CF) and the Workability Factor (WF) are plotted on a Diagram as described in d. below, the point and its associated production tolerance thus determined falls within the parallelogram described therein. Refer to AF ETL 97-5 for combined aggregate plot area recommendations for the intended placement technique(s).

b. Determine the Coarseness Factor (CF) from the following equation:

CF = (cumulative percent retained on the 9.5 mm sieve)(100) (cumulative percent retained on the 2.36 mm sieve)CF = (cumulative percent retained on the 3/8 inch sieve)(100) (cumulative percent retained on the No. 8 sieve)

c. The Workability Factor (WF) is defined as the percent passing the 2.36 mm No. 8 sieve based on the combined gradation. Adjust the WF, prorated upwards only, by 2.5 percentage points for each 42 kg 94 pounds of cementitious material per cubic meter yard greater than 335 kg per cubic meter 564 pounds per cubic yard.

d. Plot a diagram using a rectangular scale with WF on the Y-axis with units from 20 (bottom) to 45 (top), and with CF on the X-axis with units from 80 (left side) to 30 (right side). On this diagram, plot a parallelogram with corners at the following coordinates (CF-75, WF-28), (CF-75, WF-40), (CF-45, WF-32.5), and (CF-45, WF-44.5). If the point determined by the intersection of the computed CF and WF does not fall within the above parallelogram, revise the grading of each size of aggregate used and the proportions selected as necessary.

e. Plot the associated production tolerance limits, identified in Table 6, around the CF and adjusted WF point.

1.2.2 Coarse Aggregate

1.2.2.1 Material Composition

Provide coarse aggregate consisting of crushed or uncrushed gravel, crushed stone,or a combination thereof. Provide aggregates consisting of clean, hard, uncoated particles meeting the requirements of ASTM C33/C33M except as specified herein. Provide coarse aggregate that has been washed sufficient to remove dust and other coatings. Provide coarse aggregate with no more than 40 percent loss when subjected to the Los Angeles abrasion test in accordance with ASTM C131/C131M. Provide coarse aggregates with a maximum sodium sulfate soundness loss of 12 percent, or with a magnesium sulfate soundness loss of 18 percent after five cycles when tested in accordance with ASTM C88.

1.2.2.2 Particle Shape Characteristics

Provide coarse aggregates that are angular or subangular in shape. The quantity of flat particles and elongated particles in any size group coarser than the 9.5 mm 3/8 inch sieve are not allowed to exceed 20 percent by weight as determined by the Flat Particle Test and the Elongated Particle Test of ASTM D4791. A flat particle is defined as one having a ratio of width to thickness greater than 3; an elongated particle is one having a ratio of length to width greater than 3.

1.2.2.3 Size and Grading

Provide coarse aggregate with a nominal maximum size of 1.5 inches (25mm). Grade and provide the individual aggregates in size groups meeting the individual grading requirements of ASTM C33/C33M, to meet the coarseness and workability factor criteria for the proposed combined gradation. Additional aggregate size groups may be required to meet the above mentioned coarseness and workability criteria of paragraph

COMBINED AGGREGATE GRADATION.

1.2.2.4 Deleterious Materials - Airfield Pavements

The amount of deleterious material in each size group of coarse aggregate is not allowed to exceed the limits shown in Table 2 below, determined in accordance with the test methods shown.

TABLE 2

LIMITS OF DELETERIOUS MATERIALS IN COARSE AGGREGATE FOR

AIRFIELD PAVEMENTS

Percentage by Mass Materials (h) Limit Clay lumps and friable particles

(ASTM C142/C142M)

0.2

Shale (a) (ASTM C295/C295M) 0.1 Material finer than 0.075 mm No. 200 sieve (b) (

ASTM C117)

0.5

Lightweight particles (c)

(ASTM C123/C123M)

0.2

Clay ironstone (d) (ASTM C295/C295M) 0.1 Chert and cherty stone (less than 2.40 Sp. Gr.) (e) (ASTM C123/C123M and ASTM C295/C295M)

0.1

Claystone, mudstone, and siltstone (f) (

ASTM C295/C295M)

0.1

Shaly and argillaceous limestone (g)

(ASTM C295/C295M)

0.2

Other soft particles (COE CRD-C 130) 1.0 Total of all deleterious substances exclusive of material finer than 0.075 mm No. 200 sieve

1.0

(a) Shale is defined as a fine-grained, thinly laminated or fissile sedimentary rock. It is commonly composed of clay or silt or both. It has been indurated by compaction or by cementation, but not so much as to have become slate.

(b) Limit for material finer than 0.075 mm No. 200 sieve is allowed to be increased to 1.5 percent for crushed aggregates if the fine material consists of crusher dust that is essentially free from clay or shale. Use XRD or other appropriate techniques as determined by petrographer to quantify amount and justify increase.

(c) Test with a separation medium with a density of Sp. Gr. of 2.0. This limit does not apply to coarse aggregate manufactured from blast-furnace slag unless contamination is evident.

(d) Clay ironstone is defined as an impure variety of iron carbonate, iron oxide, hydrous iron oxide, or combinations thereof, commonly mixed with clay, silt, or sand. It commonly occurs as dull, earthy particles, homogeneous concretionary masses, or hard-shell particles with soft interiors. Other names commonly used for clay ironstone are "chocolate bars" and limonite concretions.

1.2.2.5 Testing Sequence for Deleterious Materials in Coarse Aggregate No extension of time or additional payment due to any delays caused by the Testing or evaluation is allowed. The minimum test sample size of the coarse aggregate is 90 kg (200 pounds) for the 3/4 inch and larger maximum size and 25 pounds for the No.

4 to 3/4 inch coarse aggregate.

1.2.3. Fine Aggregate

1.2.3.1 Composition

Provide fine aggregate consisting of natural sand, manufactured sand, or a combination of the two, and composed of clean, hard, durable particles meeting the requirements of ASTM C33/C33M. Provide fine aggregate that has been washed sufficient to remove dust and other coatings. Stockpile and batch each type of fine aggregate separately.

Provide fine aggregate with particles that are generally spherical or cubical in shape.

1.2.3.2 Grading

Provide fine aggregate, as delivered to the mixer, with a grading that conforms to the requirements of ASTM C33/C33M and having a fineness modulus of not less than 2.50 nor more than 3.40.

1.3 CHEMICAL ADMIXTURES

1.3.1 General Requirements

Chemical admixtures may only be used when the specific admixture type and manufacturer is the same material used in the mixture proportioning studies and after approval of a contractor submitted mix design by the government project engineer.

Provide air-entraining admixture conforming to ASTM C260/C260M. Calcium chloride and admixtures containing calcium chloride are not allowed. If used, provide retarding or water-reducing admixture that meet the requirements of ASTM C494/C494M, Type A, B, or D, except that the 6-month and 1-year compressive strength tests are waived.

ASTM C494/C494M, Type F and G high range water reducing admixtures and Type S specific performance admixtures are not allowed. ASTM C1017/C1017M flowable admixtures are not allowed.

1.3.2 High Range Water Reducing Admixture (HRWRA)

High Range Water Reducing Admixtures are NOT PERMITTED except when using Silica Fume. If used, provide a high-range water-reducing admixture that meets the requirements of ASTM C494/C494M, Type F or G, that is free from chlorides, alkalis, and is of the synthesized, sulfonated complex polymer type. Add the HRWRA to the concrete as a single component at the batch plant. Add the admixture to the concrete mixture only when its use is approved or directed, and only when it has been used in mixture proportioning studies to arrive at approved mixture proportions. Submit certified copies of the independent laboratory test results required for compliance with ASTM C494/C494M.

1.4 WATER

Provide water for mixing and curing that is fresh, clean, potable, and free of oil, acid, salt, or alkali. Non-potable water, or water from concrete production operations, may be used if it meets the requirements of ASTM C1602/C1602M.

1.5 SPECIFIED FLEXURAL STRENGTH

Specified flexural strength, R, for concrete is 650 psi at 28 days, as determined by tests made in accordance with ASTM C78/C78M of beams fabricated and cured in accordance with ASTM C192/C192M

1.6 WATER-CEMENTITIOUS MATERIALS RATIO:

The MAXIMUM allowable water-cementitious material ratio is 0.45. The water-cementitious material ratio is the equivalent water-cement ratio as determined by conversion from the weight ratio of water to cement plus SCM by the mass equivalency method described in ACI 211.1.

1.7 AIR CONTENT:

Provide concrete that is air-entrained with a total air content of 5.0% plus or minus 1.5 percentage points, at the point of placement. Determine air content in accordance with

ASTM C231/C231M.

1.8 SLUMP:

The allowable slump of the concrete at the point of placement must be between 75 mm (3 inches) – 127 mm (5 inches) for pavement constructed with fixed forms. The slump test will be conducted in accordance with ASTM C143.

1.9 CONCRETE DENSITY:

Concrete density will be checked using ASTM C138.

1.10 CONCRETE TEMPERATURE:

The maximum concrete temperature allowed is 90F/32.2C at the time of placement. The temperature will be tested in accordance with ASTM C1064.

1.11 MIXTURE PROPORTIONS:

Provide concrete composed of cementitious material, water, fine and coarse aggregates, and admixtures. Include supplementary Cementitious Materials (SCM) choice and usage in accordance with paragraph SUPPLEMENTARY CEMENTITIOUS MATERIALS (SCM) CONTENT. Provide a minimum total cementitious materials content of 470 pounds per cubic yard (278kg/m3). Acceptable admixtures consist of air entraining admixture and may also include, as approved, water-reducing admixture.

2. SCHEDULE: The contractor must be able to deliver a specified quantity of concrete within 3 days notice from the project manager or Contracting Officer’s Representative. Orders may be up to 600 CY in size. The contractor shall deliver the ordered quantity to match the government’s rate of concrete placement, but at minimum must be able to provide 1 truck every 15 minutes for the entire order. The contractor will provide batch delivery tickets in english with every truck to allow Government personnel to accept delivery.

3. LIABILITY: The contractor shall be liable for any damages resulting from any carelessness or failure to follow proper safety, installation, engineering, or maintenance procedures and standards.

4. GOVERNMENT FURNISHED SERVICES: The government will provide site preparation, concrete placement, fininshing, and quality assurance work.

5. GENERAL INFORMATION

5.1 HOURS OF OPERATION: The normal hours of operation for the project are from 0600 to 2100, every day of the week.

5.2 CONTRACTOR PERSONNEL: The contractor shall provide point of contact (POC) for all contractual matters during all hours of operation. The contractor will provide an English speaking foreman on-site during all deliveries. The POC shall respond within 1 hour during normal duty hours of operation and within 2 hours during non-duty hours to discuss concerns with government personnel designated by the Contracting Officer.

6. SECURITY

6.1 PASS AND IDENTIFICATION ITEMS: Prior to the start of on-site work, the contractor shall submit all applications for base passes for all employees, including sub-contractor employees, and vehicles requiring access to Daegu Air Base in order to perform under this contract. All drivers shall receive airfield flight line training prior to concrete delivery to ensure access for pour days.

6.2 RETRIEVING IDENTIFICATION MEDIA: The contractor shall return all identification media and/or visitor passes from employees who depart for any reason before the contract expires; i.e. terminated for cause, reassignment, retirement, etc.

6.3 TRAFFIC LAWS: The contractor and its employees shall comply with base traffic regulations. Traffic regulations include, but are not limited to: Employees shall wear seatbelts when operating or riding in any vehicle (military, company or private owned) while on installation. Be aware of reduced speed limits and exercise caution when driving in base housing and school zones. All vehicle operators on the installation shall not use cell phones unless the vehicle is safely parked or they are using a 100% hands free device.

6.4 FOR OFFICIAL USE ONLY (FOUO): The contractor shall comply with DoD 5400.7-R, Chapter 4, DoD Freedom of Information Act (FOIA) Program, requirements.

This regulation sets policy and procedures for the disclosure of records to the public and for marking, handling, transmitting, and safeguarding FOUO material.

6.5 REPORTING REQUIREMENTS: Contractor personnel shall report to an appropriate authority any information or circumstances of which they are aware may pose a threat to the security of DoD personnel, contractor personnel, resources, and classified/unclassified defense information. Employees shall be briefed by their immediate supervisor upon initial on-base assignment.

6.6 PHYSICAL SECURITY: The contractor shall be responsible for safeguarding all Government property and controlled forms provided for contractor use. At the end of each work period, all Government facilities, equipment and materials shall be secured.

7. MILITARY EXERCISES: No compensation will be claimed for any delays resulting from re-entry procedures due to military exercises.

8. DELIVERABLES

8.1 LIST OF DELIVERABLES:

• Concrete mix design for Government Project Engineer approval

• Copies of laboratory test reports and sources for cement, supplementary cementitious materials (SCM), aggregates, and all admixtures.

• Flexural strength test results, (7-day minimum) (ASTM C78/C78M)

9. DELIVERY LOCATION:

The contractor shall deliver materials to the flight line access gate located near building 5006 on Daegu (K-2) Air Base. Upon arrival, the contractor will be escorted by 554 RHS personnel onto flight line and directed to final delivery location.

Figure 1: Project Location: Daegu K-2 Air Base

Figure 2: Flight Line Access Gate Location for Delivery

10. REFERENCE STANDARDS:

UFC 3-260-02

UFGS 32 13 11

ASTM C33/C33M-13

ASTM C78/C78M

ASTM C88

ASTM C131/C131M

ASTM C138

ASTM C143

ASTM C150/C150M

ASTM C192/C192M

ASTM C231/C231M

ASTM C260/C260M

ASTM C494/C494M

ASTM C1064

ASTM C1260

ASTM C1602/C1602M

ASTM C1567

ASTM D4791