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Departmental Materials Specification DMS-9210

Materials and Tests Division 1 – 10 EFFECTIVE DATE: MAY 2019

DMS-9210

Limestone Rock Asphalt Effective Date: May 2019

1. DESCRIPTION

This specification governs the production, quality control, and quality assurance of native limestone rock asphalt (LRA) aggregate used for surface treatments, and of cold mixed material consisting of native LRA aggregate, fluxing material, water, and when specified, additives and virgin aggregates.

2. MATERIALS

2.1. LRA Aggregates for Surface Treatments. Provide LRA aggregates for surface treatments of the type, grade, and surface aggregate classification (SAC) shown on the plans or purchase order in accordance with the material requirements of Item 302, “Aggregates for Surface Treatments.”

2.2. Type I LRA and Type II LRA Mixtures. Type I LRA mixture consists entirely of native LRA aggregate, flux material, water, and additives. Type II LRA mixture consists of a blend of native LRA aggregate, virgin aggregates, fluxing material, additives, and water.

Provide LRA mixtures of the type, grade, and SAC shown on the plans or purchase order and in accordance with the following requirements.

2.3. Aggregate. Furnish aggregates from sources that conform to the requirements shown in Table 1A or Table 1B and as specified in this Section, unless otherwise shown on the plans. Provide aggregate stockpiles that meet the definition in this Section for either a coarse aggregate or fine aggregate. Supply mechanically crushed gravel or stone aggregates that meet the definitions in Tex-100-E. Materials and Tests Division (MTD) will designate the plant or the quarry as the sampling location. Samples must be from materials produced for the project. The Engineer will establish the SAC and MTD will perform Los Angeles abrasion, magnesium sulfate soundness, and Micro-Deval tests. Perform all other aggregate quality tests listed in Table 1A or Table 1B and document all test results. MTD may run tests on independent or split samples to verify Contractor test results. Stockpile aggregates for each source and type separately.

2.3.1. Coarse Aggregate. Coarse aggregate stockpiles must have no more than 20% material passing the No. 10 sieve. Provide aggregates from sources listed in the Department’s Bituminous Rated Source Quality Catalog (BRSQC). Provide non-listed sources only when tested by MTD and approved before use. Allow 30 calendar days for MTD to sample, test, and report results for non-listed sources.

Provide coarse aggregate with a minimum SAC as shown on the plans. SAC requirements apply only to aggregates used on the surface of travel lanes, unless otherwise shown on the plans. The SAC for sources on the Department’s Aggregate Quality Monitoring Program (AQMP) is listed in the BRSQC.

When a Type II LRA mixture is specified, Class B aggregate may be blended with Class A aggregate to meet requirements for Class A materials. When blending Class A and B aggregates to meet a Class A requirement, ensure that at least 50% by weight or volume of the material retained on the No. 4 sieve comes from the Class A aggregate source. Blend virgin aggregate with native LRA aggregate in the percentages shown in Table 4. When blending, do not use Class C aggregates.

2.3.2. LRA Aggregate. Native LRA aggregate consists of limestone impregnated with naturally occurring asphalt.

LRA aggregates that contain less than 1% of naturally occurring asphalt are defined as white rock. Each ftp://ftp.dot.state.tx.us/pub/txdot-info/cmd/mpl/brsqc.pdf ftp://ftp.dot.state.tx.us/pub/txdot-info/cmd/mpl/brsqc.pdf

Materials and Tests Division 2 – 10 EFFECTIVE DATE: MAY 2019 aggregate source proposed for use will be sampled and tested to determine compliance with Table 1A or Table 1B requirements before the addition of fluxing material, additives, and water.

2.3.3. Virgin Aggregate. Provide virgin aggregates that meet the requirements of Table 1A or Table 1B. Each aggregate source proposed for use will be sampled and tested to determine compliance with Table 1A or Table 1B requirements before the addition of fluxing material, additives, and water.

2.3.4. Fine Aggregate. Fine aggregate stockpiles must have no more than 30% material retained on the No. 10 sieve. Supply fine aggregates that are free from organic impurities. MTD may test the fine aggregate in accordance with Tex-408-A to verify that the material is free from organic impurities. Use only fine aggregates generated by the production and handling of LRA or the virgin coarse aggregate. Use LRA fine aggregate that has a naturally impregnated bitumen content of 5.0 to 8.5% when tested in accordance with Tex-236-F.

If 10% or more of the stockpile is retained on the No. 4 sieve, test the stockpile and verify that it meets the requirements in Table 1B for Coarse Aggregate Angularity (Tex-460-A) and Flat and Elongated Particles (Tex-280-F).

Table 1A Aggregate Quality Requirements for LRA Used in Surface Treatments (Item 302)

Property Test Method Native LRA Aggregate

Requirement

SAC AQMP As shown on the plans

Deleterious material1, %, Max Tex-217-F, Part I 2.01

Decantation, %, Max Tex-406-A 1.5

Flakiness index, Max Tex-224-F 172

Los Angeles abrasion, %, Max Tex-410-A 402

Magnesium sulfate soundness, 5 cycles, %, Max

Tex-411-A 25

Micro-Deval abrasion3, %, Max Tex-461-A Note 3

Naturally impregnated bitumen content, total combined gradation, % by weight

Tex-236-F 4.0–7.0

White rock count4, % by weight Tex-220-F 15–35

1. Deleterious material includes iron pyrites.

2. Unless otherwise shown on the plans.

3. Not used for acceptance purposes. Used by MTD as an indicator of the need for further investigation.

4. White rock count applies to aggregate retained on the #4 sieve.

Materials and Tests Division 3 – 10 EFFECTIVE DATE: MAY 2019

Table 1B Aggregate Quality Requirements for LRA Used in Mixtures (Item 330)

Property Test Method Requirement

Native LRA Aggregate Virgin Aggregate

Coarse Agregate

SAC AQMP As shown on the plans A

Deleterious material, %, Max Tex-217-F, Part I 1.5 1.5

Decantation, %, Max Tex-406-A N/A 1.5

Micro-Deval abrasion, %, Max Tex-461-A Note 1 Note 1

Los Angeles abrasion, %, Max Tex-410-A 402 25

Magnesium sulfate soundness, 5 cycles, %, Max Tex-411-A 30 25

Coarse aggregate angularity, 2 crushed faces, %, Min

Tex-460-A, Part I N/A 853

Flat and elongated particles @ 5:1, %, Max Tex-280-F N/A 10

Combined Aggregate4

Naturally impregnated bitumen content, total combined gradation, % by weight

Tex-236-F 5.0–8.5 N/A

1. Not used for acceptance purposes. Used by MTD as an indicator of the need for further investigation.

2. Unless otherwise shown on the plans.

3. Unless otherwise shown on the plans. Only applies to crushed gravel.

4. Aggregates, without added mineral filler or additives, combined as used in the job mix formula (JMF).

2.4. Fluxing Material. Provide fluxing material, composed of flux oil (a blend of asphalt and oil) or a blend of flux oil and aromatic oil, meeting the requirements of Table 2. When required by MTD, provide a test report showing that the fluxing material meets the requirements of Table 2. Use fluxing material in the paving mixture to provide materials that remain workable in a stockpile for at least 6 mo.

Table 2 Fluxing Material Properties

Property

Material Flux Oil Aromatic Oil

AASHTO or ASTM Test Procedure

Min Max Min Max

Kinematic viscosity, 140°F, cSt T 201 60 200 – 150

Loss on heating, % by weight D 6/6M – 10 – 12

Water, % D 95 – 0.2 – 0.2

Flash point, C.O.C., °F T 48 200 – 135 –

2.5. Water. Provide water that meets the requirements of Item 204, “Sprinkling.”

2.6. Additives. When shown on the plans, use the type and rate of additive specified. Other additives may be used, when necessary, to meet the requirements of this Specification. Approved additives must be listed in the Quality Control Plan (QCP) as specified in Section 4.3 of this Specification.

Other additives, if used, may not adversely affect the LRA material’s stockpile life, unless otherwise directed.

If other additives are used, produce a demonstration stockpile of at least 100 tons of LRA material at the LRA production sight and allow to sit for at least 6 mo. to demonstrate that the additive has not adversely affected stockpile life, unless otherwise directed.

If lime is specified or selected for use as an antistripping agent, add only to the virgin aggregate in accordance with Item 301, “Asphalt Antistripping Agents.” If a liquid antistripping agent is used, add in accordance with Item 301. Do not add lime directly into the mixing drum of any plant where lime is removed

Materials and Tests Division 4 – 10 EFFECTIVE DATE: MAY 2019 through the exhaust stream, unless the plant has a baghouse or dust collection system that re- introduces the lime back into the drum.

2.7. Precoating. When shown on the plans, precoat aggregate uniformly and adequately with asphalt material to the satisfaction of the Engineer. When shown on the plans, specific aggregates may be prohibited from being precoated. Do not precoat LRA aggregate that contains visual surface moisture or excessive quantities of fines. Meet the requirements of Tables 2 and 3 before precoating. Furnish precoated aggregate that spreads uniformly using approved mechanical spreading equipment.

The Engineer will reject precoated aggregate that contains more than 0.5% passing the No. 40 sieve as determined by Tex-200-F, Part I.

2.7.1. Asphalt Material. Precoat the aggregates with asphalt material that meets the requirements of Item 300, “Asphalts, Oils, and Emulsions.” Precoat the LRA with flux oil meeting the requirements of Item 330, “Limestone Rock Asphalt Pavement.” Unless a specific precoat material is specified on the plans, use any asphalt material that meets the requirements of Item 300.

3. EQUIPMENT

3.1. Field Office and Inspection Laboratory. Field office and inspection laboratory furnishings and equipment will be subject to approval. As directed, maintain, repair, or replace the building and equipment immediately, if either the building or equipment becomes inadequate for its intended use. Provide a field office and inspection laboratory with the following:

controlled access with security measures controlled by MTD, unrestricted internet access, ceilings at least 8 ft. high, square footage as approved by MTD, adequate heating, ventilation, and air conditioning system, adequate electrical outlets, a sink with hot and cold running water, windows, impervious floor covering, enough ventilation for testing equipment, and restroom facilities that include:

a flush toilet, a sink with hot and cold running water, a sewer or septic tank with connections, and adequate restroom supplies.

3.2. Mixing Equipment. Provide required or necessary equipment in accordance with Item 320, “Equipment for Asphalt Concrete Pavement.” Use either weigh-batch or continuous mixing plants to produce pre-coated LRA aggregates, Type I LRA mixture, or Type II LRA mixture. The following requirements are modifications or additions to those in Item 320.

3.2.1. Weigh-Batch Plants.

3.2.1.1. Screening and Proportioning. Provide a enough number of bins and screens to adequately proportion the materials.

3.2.1.2. Fluxing Material Measuring System. Provide a fluxing material measuring device in the fluxing material line leading to the mixer to accurately determine the accumulated amount of fluxing material. Make permanent provisions for checking the accuracy of the meter output. Provide scales to hold and weigh flux for one batch.

Materials and Tests Division 5 – 10 EFFECTIVE DATE: MAY 2019

3.2.1.3. Other Liquid Additive Measuring System (Except Liquid Antistripping Agents). Provide a liquid additive metering device leading to the mixer to accurately determine the accumulated amount of liquid additive.

3.2.1.4. Mixer. Equip the mixer with a spray bar that will distribute the fluxing material quickly and uniformly throughout the mixer.

3.2.2. Continuous Mixing Plants.

3.2.2.1. Screening and Proportioning. Provide enough number of bins and screens to adequately proportion the materials. These requirements also apply to stockpiled material proposed for direct use by a continuous mixing plant without the use of plant bins.

3.2.2.2. Fluxing Material Measurement System. Place a fluxing material measuring device in the fluxing material line leading to the mixer to accurately determine the accumulated amount of fluxing material. Make permanent provisions for checking the accuracy of the meter output.

3.2.2.3. Other Liquid Additive Measuring System (Except Liquid Antistripping Agents). Provide a liquid additive metering device leading to the mixer to accurately determine the accumulated amount of liquid additive.

3.2.2.4. Mixer. Provide a continuous type mixer large enough to produce not less than 40 tons of mixture per hr.

Equip the mixer with a spray bar that will distribute the fluxing material quickly and uniformly throughout the mixer.

4. CONSTRUCTION

4.1. Certification. Provide a Level IA certified specialist by the Department-approved hot-mix asphalt certification program at the plant during production operations to conduct all sampling and testing.

4.2. Reporting. Use Department-provided software to record and calculate all test data.

4.2.1. Production Testing. MTD and the Producer will provide test results to the other party within two working days of performing all required testing. MTD and the Producer will immediately report to the other party any test result that requires production to be suspended or that fails to meet the specification requirements of Item 302 or Item 330. Use the approved communication method (e.g., email, paper copy) to submit test results to MTD. MTD may suspend production if test results are not received within two working days of performing all required testing. The Producer may, at its own risk, ship material before completing and reporting all required testing and information to MTD. Notify MTD each time this occurs and immediately provide shipment information specified in Section 4.2.2. Replace material that does not meet the requirements listed in Tables 1b, 2, 3, 4, 5, and 6, shipped at own risk.

Use the procedures described in Tex-233-F to plot the results of all quality control and quality assurance testing. Update the control charts as soon as test results become available. Make the control charts readily accessible at the field laboratory. MTD may suspend production for failure to update control charts.

4.2.2. Shipment Information. Use Department-provided software to report shipment information to include the following:

shipment date, Control-Section-Job (CSJ) number, project number, requisition or purchase order and Item numbers, maintenance contract numbers, district, county, Materials and Tests Division 6 – 10 EFFECTIVE DATE: MAY 2019 highway, contractor, delivery destination, material type, material quantity, and railcar numbers, if shipped by rail.

The Producer will provide this information within one working day of shipment. Perform the quality control of LRA according to the production testing frequency established in this Specification. The Department will perform quality assurance. MTD may suspend production for failure to report shipment information.

4.3. Quality Control Plan (QCP). Develop a QCP and submit a written QCP to MTD for approval before the beginning of production. Follow the QCP in detail. Obtain approval from MTD for changes to the QCP made during production. MTD may suspend operations if the Contractor fails to provide or comply with the QCP.

Include the following items in the QCP for LRA surface treatment aggregate and LRA mixtures as appropriate.

4.3.1. Project Personnel. For project personnel, include:

a list of individuals responsible for quality control with authority to take corrective action and contact information for each individual listed.

4.3.2. Material Delivery and Storage. For material delivery and storage, include:

the sequence of material processing, delivery, and minimum quantities to assure continuous plant operations;

aggregate stockpiling procedures to avoid contamination and segregation;

frequency, type, and timing of LRA and aggregate stockpile testing to assure conformance of material requirements before mixture production;

flux oil for use in the LRA mixture;

aromatic oil for use in the LRA mixture; and additive for use in the LRA mixture.

4.3.3. Production. For production, include:

loader operation procedures to avoid contamination in cold bins;

the number of bins and the aggregate size to be placed in each bin for each type of LRA mixture produced;

procedures for calibrating and controlling cold feeds;

procedures to eliminate debris and oversized material;

procedures for adding and verifying rates of each applicable mixture component (i.e., LRA, white rock, aggregates, flux oil, additives) to minimize the formation of flux balls;

procedures for LRA mixture testing to assure conformance of material requirements during production;

procedures for reporting job control test results; and procedures to avoid segregation in the silo.

4.4. Mixture Design.

4.4.1. Mixture Properties. Provide completed LRA mixtures meeting the requirements of Tables 3, 4, and 5 for the Type, Grade, and SAC shown on the plans or purchase order.

Materials and Tests Division 7 – 10 EFFECTIVE DATE: MAY 2019

Table 3 Master Grading per Tex-200-F, Part I, % Cumulative Retained by Weight

Sieve Size

Type I Type II

Grade Grade

AA

Coarse Base

A Medium

Base

B Fine Base

C Coarse Surface

CC

Medium Surface

D Fine

Surface

BS

Surface

CS

Medium Surface

DS

Fine

Surface

FS

Thin

Surface

1-1/2" 0 – – – – – – – – –

1-1/4" 0–10 – – – – – – – – –

1" – 0 – – – – – – – –

7/8" 15–30 0–10 – – – – – – – –

3/4" – – – – – – 0 – – –

5/8" – 5–15 0 – – – 0–2 0 – –

1/2" – – 0–2 0 0 – 0–10 0–2 0 –

3/8" 25–45 25–35 5–15 0–2 0–2 0 10–25 0–10 0–2 0

1/4" – – – – – 0–5 – – – –

#4 45–60 50–60 45–60 35–50 35–50 10–25 40–55 35–55 10–25 0–15

#10 60–75 65–75 60–75 65–80 50–65 50–65 60–75 60–75 50–65 35–60

Table 4 Mixture Components % by Weight

Mixture Component Type II Type II

Grade Grade

AA

Coarse Base

A Medium

Base

B Fine Base

C Coarse Surface

CC

Medium Surface

D Fine

Surface

BS

Surface

CS

Medium Surface

DS

Fine

Surface

FS

Thin

Surface

White rock1 N/A 15–35 15–35 15–35 15–35 15–35 15–35 15–35 15–35 N/A

LRA 96–98 96–98 96–98 96–98 96–98 96–98 72–80.5 72–80.5 72–80.5 36.5–63.5

Virgin aggregate N/A N/A N/A N/A N/A N/A 18–25 18–25 18–25 35–60

Flux Material 1.0–4.0 1.0–4.0 1.0–4.0 1.0–4.0 1.0–4.0 1.0–4.0 1.0–3.0 1.0–3.0 1.0–3.0 1.0–3.5

1. White rock values are given as a percentage of total LRA aggregate.

4.4.2. Job-Mix Formula for LRA Mixtures. Provide a job-mix formula (JMF) design report for a paving mixture that meets the requirements of Tables 3, 4, and 5. Identify in the report the combined aggregate gradation, the percentage of each material component used in the mixture, and results of all applicable tests. Obtain approval of the JMF before starting production. With approval, the JMF target values may be adjusted as needed within the percentage point tolerances of Table 6 without a laboratory redesign of the mixture. If the adjustments exceed the tolerances shown in Table 6, MTD may require a new mixture design. Adjustments must not exceed the master gradation for the type of mixture specified on the plans.

Materials and Tests Division 8 – 10 EFFECTIVE DATE: MAY 2019

Table 5 Mixture Properties

Property Test Method Requirement

Hveem stability, Min Tex-208-F 351

Laboratory-molded density, % Tex-207-F 90.0 ± 2.0

Theoretical maximum specific gravity of bituminous mixtures

Tex-227-F N/A

Bitumen content, % by weight Tex-236-F 6.5–11.0

Water and light hydrocarbon volatiles, %, Max Tex-212-F, Part II 6.0

Boil test, % Tex-530-C 102

Cantabro loss, %, Max Tex-245-F 15.0

1. Cease operations if two consecutive tests fail. MTD may waive this requirement if other information indicates that the next material to be produced will meet the minimum value specified.

2. May be increased or waived when directed by MTD.

Table 6 Deviations from Current JMF Target Values

Material Test Method Tolerance

Individual % retained for #10 sieves and larger

Tex-200-F, Part I

±5.0

Individual % retained for sieves smaller than #10 and larger than #200

±3.0

% passing the #200 sieve ±2.0

Fluxing material. % Determined from quantity used ±0.2

4.5. Weather Conditions. Produce LRA mixture for Item 330 when the air temperature is 40°F or higher, unless otherwise approved. Precoat aggregate for Item 302 when the air temperature is 50°F and rising, unless otherwise approved.

4.6. Production Operations. All plant facilities and materials used are subject to inspection or testing by MTD at any time during production or use. Provide safe access for Department personnel to perform inspection and sampling. Quality control is solely the responsibility of the Producer, and the Department will not perform quality control for the Producer.

4.6.1. Stockpiling of LRA. Provide a smooth and well-drained area, cleared of trash, weeds, and grass. Stockpile, handle, and load LRA in a manner that will minimize aggregate degradation and segregation. Avoid contamination and mixing of stockpiles. MTD may reject stockpiled materials that come in contact with the earth or other objectionable material.

4.7. Production Acceptance.

4.7.1. Production Sampling. Obtain LRA samples at the plant in accordance with Tex-222-F. The sampler will split each sample into two equal portions in accordance with Tex-200-F and label these portions as “Producer” and “MTD.” Deliver the samples to the appropriate party’s laboratory. Discard unused samples after acceptance of MTD test results.

4.7.2. Production Testing. The Producer and MTD must perform production tests in accordance with Tables 7 and

8. Perform production testing in accordance with Table 7 for LRA used for surface treatments. Perform production testing in accordance with Table 8 for LRA mixtures. The Producer has the option to verify MTD’s test results on split samples provided by the Producer or MTD.

Materials and Tests Division 9 – 10 EFFECTIVE DATE: MAY 2019

Unless otherwise directed, MTD will suspend production and cease shipping of materials if the Producer fails to comply with the production testing frequency listed in Tables 7 and 8. Immediately take corrective action if any test result fails to meet the material requirements of Item 302 and this Specification. MTD may suspend production, cease shipping of materials, and require removal of any material transported to a railcar if test results from any two consecutive tests of the same property listed in Tables 7 and 8 fail to meet the material requirements.

Table 7 Production Testing Frequency for LRA Used for Surface Treatments (Item 302)

Description Test Method Minimum Producer Testing

Frequency Minimum MTD Testing

Frequency1

Gradation Cumulative % retained

Tex-200-F, Part I

Combined aggregate sample2

1 per 300 tons 1 per 3,000 tons

Precoated aggregate

1 per 1,200 tons 1 per 10,000 tons

Deleterious Material Tex-217-F, Part I 1 per month, per aggregate (per grade) 1 per month, per aggregate

(per grade)

Decantation Tex-406-A 1 per month, per aggregate (per grade) 1 per month, per aggregate

(per grade)

White rock count Tex-220-F 1 per 600 tons, per aggregate

(per grade) 1 per 6,000 tons, per aggregate (per grade)

Flakiness index Tex-224-F 1 per month, per aggregate (per grade) 1 per month, per aggregate

(per grade)

Naturally impregnated bitumen content, % by wt. for combined aggregate

Tex-236-F 1 per 600 tons 1 per 5,000 tons

Micro-Deval abrasion Tex-461-A 1 per week, per aggregate (per grade) 1 per month

Unit weight Tex-404-A 1 per 20,000 1 per 20,000

1. MTD may reduce or waive the sampling and testing requirements based on a satisfactory test history.

2. Combined aggregate sample may contain LRA, white rock, and/or virgin aggregate depending on the grade/type.

Table 8 Production Testing Frequency for LRA Used in Mixtures (Item 330)

Description Test Method Minimum Producer Testing

Frequency Minimum MTD Testing

Frequency1

Cumulative % retained (combined aggregate sample2)

Tex-200-F, Part I 1 per 300 tons 1 per 3,000 tons

Laboratory-molded density Tex-207-F 1 per week, per mix type3 1 per week, per randomly selected mix type4

Hveem stability Tex-208-F 1 per week, per mix type3, 5 1 per week, per randomly selected mix type4

Moisture content Tex-212-F, Part II 1 per week, per mix type 1 per week, per selected mix type4

Deleterious material Tex-217-F, Part I 1 per month, per aggregate (per grade) 1 per month, per aggregate

(per grade)

Decantation Tex-406-A 1 per month, per aggregate6

(per grade) 1 per month, per aggregate6

(per grade)

White rock count Tex-220-F 1 per day, per mix type 1 per week, per mix type

Flakiness index Tex-224-F 1 per month, per aggregate

(per grade) 1 per month, per aggregate

(per grade)

Theoretical maximum specific (Rice) gravity Tex-227-F 1 per week, per mix type3 1 per week, per randomly selected mix type4

Materials and Tests Division 10 – 10 EFFECTIVE DATE: MAY 2019

Description Test Method Minimum Producer Testing

Frequency Minimum MTD Testing

Frequency1

Naturally impregnated bitumen content, % by weight for LRA material passing the #10 sieve

Tex-236-F 1 per day 1 per week

Naturally impregnated bitumen content, % by weight for LRA combined aggregate

Tex-236-F 1 per 600 tons 1 per 5,000 tons

Micro-Deval abrasion Tex-461-A 1 per week, per mix type3 1 per month

Unit weight Tex-404-A 1 per 20,000 1 per 20,000

Kinematic viscosity, 1,400°F, cSt AASHTO T 201 1 per month 1 per month

Heat loss test ASTM D 6/6M 1 per month 1 per month

1. MTD may reduce or waive the sampling and testing requirements based on a satisfactory test history.

2. Combined aggregate sample may contain LRA, white rock, and/or virgin aggregate depending on the mixture type.

3. Minimum production of 100 tons required before performing test.

4. Mix type randomly selected by MTD at the plant.

5. Deliver molds used to determine laboratory-molded density to MTD for Hveem Stability testing.

6. Decantation is performed on virgin aggregate only that is added to LRA mixtures.

5. ARCHIVED VERSIONS

Archived versions are available.