MODIFICATION
56 -- Aggregate Material in Support of a Future Airfield Paving Project - Aggregate Material Requirements
- Notice Date
- 4/25/2018
- Notice Type
- Modification/Amendment
- NAICS
- 212319
— Other Crushed and Broken Stone Mining and Quarrying
- Contracting Office
- Department of the Army, U.S. Army Corps of Engineers, USACE District, Omaha, Attn: CENWO- CT, 1616 Capitol Ave, Omaha, Nebraska, 68102-4901, United States
- ZIP Code
- 68102-4901
- Solicitation Number
- W9128F-18-S-M023
- Archive Date
- 12/31/2018
- Point of Contact
- Stephanie A. Harr,
- E-Mail Address
-
stephanie.a.harr@usace.army.mil
(stephanie.a.harr@usace.army.mil)
- Small Business Set-Aside
- N/A
- Description
- Sources Sought W9128F-18-S-M023 This is a Sources Sought Notice (under NAICS code 212319) and is a market research tool for information and planning purposes only. THIS IS NOT A REQUEST FOR PROPOSAL, QUOTATION, OR BID (RFP/RFQ/RFB). NO SOLICITATION IS CURRENTLY AVAILABLE. The U.S. Army Corps of Engineers, Omaha District is conducting market research to identify sources (Small Businesses and Other-than-Small Businesses) for the procurement of Aggregate Material in support of a future Airfield Paving Project at Fort Carson, Colorado. The responses to this sources sought announcement will be used by the Government to make appropriate acquisition decisions for this project. Responses are to be sent via email to Stephanie.A.Harr@usace.army.mil no later than 2:00 p.m. MST, 9 May 2018. Please include the Sources Sought Notice Identification Number in the Subject line of the email submission. Project Description: Supply aggregate material meeting requirements listed below in support of a future Airfield Paving projects at Fort Carson, CO. Approximately 13,000 cubic yards of Portland cement concrete is to be placed on a FY18 award, the concrete aggregate requirements are as noted: 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. 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. 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 testing for evaluation and acceptance. 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 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 No. 8 sieve based on the combined gradation. Adjust the WF, prorated upwards only, by 2.5 percentage points for each 94 pounds of cementitious material per cubic yard greater than 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. Coarse Aggregate - Material Composition Provide coarse aggregate consisting of crushed or uncrushed gravel, crushed stone, or a combination thereof. Provide aggregates, as delivered to the mixers, 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. Particle Shape Characteristics Provide particles of the coarse aggregate that are generally spherical or cubical in shape. The quantity of flat particles and elongated particles in any size group coarser than the 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. Size and Grading Provide coarse aggregate with a nominal maximum size of 1.5 inches. Grade and provide the individual aggregates in two size groups meeting the individual grading requirements of ASTM C33/C33M, Size No. 4 (1.5 to 0.75 inch) and Size No. 67 (0.75 inch to No. 4) to meet the coarseness and workability factor criteria for the proposed combined gradation. A third aggregate size group may be required to meet the above mentioned coarseness and workability criteria of paragraph COMBINED AGGREGATE GRADATION. Deleterious Materials - Airfield Pavements The amount of deleterious material in each size group of coarse aggregate is not allowed to exceed the limits shown below, determined in accordance with the test methods shown. LIMITS OF DELETERIOUS MATERIALS IN COARSE AGGREGATE FOR AIRFIELD PAVEMENTS Materials (h) Percentage by Mass Clay lumps and friable particles (ASTM C142/C142M) 0.2 Shale (a) (ASTM C295/C295M) 0.1 Material finer than 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) 0.1 (ASTM C123/C123M and ASTM C295/C295M) 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 1.0 than No. 200 sieve (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 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. (e) Chert is defined as a rock composed of quartz, chalcedony or opal, or any mixture of these forms of silica. It is variable in color. The texture is so fine that the individual mineral grains are too small to be distinguished by the unaided eye. Its hardness is such that it scratches glass but is not scratched by a knife blade. It may contain impurities such as clay, carbonates, iron oxides, and other minerals. Cherty stone is defined as any type of rock (generally limestone) that contains chert as lenses and nodules, or irregular masses partially or completely replacing the original stone. (f) Claystone, mudstone, or siltstone, is defined as a massive fine-grained sedimentary rock that consists predominantly of indurated clay or silt without laminations or fissility. It may be indurated either by compaction or by cementation. (g) Shaly limestone is defined as limestone in which shale occurs as one or more thin beds or laminae. These laminae may be regular or very irregular and may be spaced from a few inches down to minute fractions of an inch. Argillaceous limestone is defined as a limestone in which clay minerals occur disseminated in the stone in the amount of 10 to 50 percent by weight of the rock; when these make up from 50 to 90 percent, the rock is known as calcareous (or dolomitic) shale (or claystone, mudstone, or siltstone). (h) Perform testing in accordance with the referenced test methods, except use the minimum sample size specified below. Testing Sequence for Deleterious Materials in Coarse Aggregate - Airfields Only The minimum test sample size of the coarse aggregate is 200 pounds for the 3/4 inch and larger maximum size and 25 pounds for the No. 4 to 3/4 inch coarse aggregate. Provide facilities for the ready procurement of representative test samples. The testing procedure on each sample of coarse aggregate for compliance with limits on deleterious materials is as follows: Step 1: Wash each full sample of coarse aggregate for material finer than the No. 200 sieve. Discard material finer than the No. 200 sieve. Step 2: Test remaining full sample for clay lumps and friable particles and remove. Step 3. Test remaining full sample for chert and cherty stone with SSD density of less than 2.40 specific gravity. Remove lightweight chert and cherty stone. Retain other materials less than 2.40 specific gravity for Step 4. Step 4: Test the materials less than 2.40 specific gravity from Step 3 for lightweight particles (Sp. GR. 2.0) and remove. Restore other materials less than 2.40 specific gravity to the sample. Step 5: Test remaining sample for clay-ironstone, shale, claystone, mudstone, siltstone, shaly and argillaceous limestone, and remove. Step 6: Test a minimum of one-fifth of remaining full sample for other soft particles. Fine Aggregate 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. Stockpile and batch each type of fine aggregate separately. Provide fine aggregate with particles that are generally spherical or cubical in shape. 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. Deleterious Material The minimum test sample size for fine aggregate proposed for use in airfield paving is 10 pounds. The amount of deleterious material in the fine aggregate is not to exceed the following limits by mass: Material Percentage by Mass Clay lumps and friable particles ASTM C142/C142M 1.0 Material finer than No. 200 sieve ASTM C117 3.0 Lightweight particles ASTM C123/C123M using a medium with a density of Sp. Gr. of 2.0 0.5 Total of all above: 3.0 Submission Details: All interested, capable, qualified and responsive contractors (under NAICS code 212319) are encouraged to reply to this market survey request. The Government requests interested parties to submit a brief description/narrative of their company (business size, business status i.e. small or large), list the site from which the material will be supplied from, the type of aggregate that meets the requirement, and the amount of aggregate capable of providing. Narratives shall be no longer than 10 pages. Email responses are required. Comments will be shared with the Government and the project management team, but otherwise will be held in strict confidence. PLEASE NOTE: THIS MARKET RESEARCH IS NOT TO BE CONSTRUED AS A COMMITMENT BY THE GOVERNMENT. ANY INFORMATION PROVIDED BY INDUSTRY TO THE GOVERNMENT AS A RESULT OF THIS SOURCES SOUGHT IS VOLUNTARY AND THE GOVERNMENT WILL NOT PAY FOR INFOMRATION SUBMITTED IN RESPONSE TO THIS SOURCES SOUGHT. Telephone inquiries will NOT be accepted.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/USA/COE/DACA45/W9128F-18-S-M023/listing.html)
- Place of Performance
- Address: Ft. Carson, Colorado, United States
- Record
- SN04900813-W 20180427/180425230859-1553801d770c91476d5514ac8e4be549 (fbodaily.com)
- Source
-
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