1、MIL-T-52i9bB 38 M 99999Ob 0223205 T I- Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Belvoir Research and Development Center, ATTN: STRBE-DS, Fort Belvoir, VA 22060-5606 by using the self-addr
2、essed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. USA 13 December 1984 SUPERSEDING MIL-T-5289 6A(ME) 29 November 1976 MILITARY SPECIFICATION TRUCK, CONCRETE, MOBILE MIXER, .8 CUBIC YARD, COMMERCIAL. CONSTRUCTION EQUIPMENT (CCE) Thi
3、s specification is approved for use by the USA Belvoir Research and Development Center, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a truck-mounted, 8 cubic yard, mobile concrete mixer. 2
4、. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1-.I Specifications and standards. Unless otherwise specified (see 6.21, the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISSI specified in the solici
5、tation, form a part of this specification to the extent specified herein. SPEC IF1 CAT IONS FEDERAL PPP-B-601 . - Boxes, Wood, Cleated-Plywood. PPP-P-40 - Packaging and Packing of Hand Tools. MILITARY MIL-P-116 MIL-E -1 O0 62 MIL-G-20241 - Preservation, Methods of. - Engines: Preparation for Shipmen
6、t and - Gasket Material, Moo1 Felt, Impregnated, Storage of. Adhesive, Pressure-Sensitive. FSC 3895 THIS DOCUMENT CONTAINS -d-d- PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-528766 38 777770b 0223206 3 MIL-P-23 3 7 7 MIL-E-52798 MIL-E-
7、5 2835 MIL-S-81733 STANDARDS FEDERAL FED- STWH28 MILITARY MIL-STD-129 MIL-STD-209 MIL-STD-281 MIL-STD-642 MIL- STD-889 MIL-STD-1474 - MIL-T-5 289 6B (ME ) - Primer Coating, Epoxy Polyamide, Chemical - Enamel, Alkyd, Camouflage. - Enamel, Modified Alkyd, Camouflage, - Sealant and Coating Compound, Co
8、rrosion and Solvent Resistant. Lus ter les s. Inhibitive. , - Screw-Thread Standards for Federal Services. *. - Marking for Shipment and Storage. - Slinging and Tiedown Provisions for Lifting - Automobile, Trucks, Truck-Tractors and . and Tying Down Military Equipment. Trailer Dollies, Preservation
9、and Packaging of. - Identification Marking of Combat and Tactical Transport Vehicles. - Dissimilar Metals. - Noise Limit for Army Materiel. 2.1.2 Other Government documents, drawings, and publications. The following ,ther Government documents, drawings, and publications form a part of this ;pecifica
10、tion to the extent specified herein. MIL-T-PD-9156 - Truck Chassis, Truck Tractors and Trucks: Commercial, Diesel Engine Driven, 50,000 to 75,000 Pounds GVWR, 6 x 4, 6 x 6, and 8 x 6; . XM915, XM916, XM917, XM918, XM919 and XM920. DEPARTMENT OF LABOR (DOL) Occupational Safety and Health Administrati
11、on (OSHA) Standards. 29CFR 1910 - Occupational Safety and Health Administration (OSHA) Standards 29CFR 1926 - Construction Safety Standards. For Construction Jobs. + (The code of Federal Regulations CFR and the Federal Register FR are for de on a subscription basis by the Superintendent of Documents
12、, U.S. Government -inting Office, Washington, DC 20402. gulations may be obtained from the Federal agency responsible for issuance When indicated, reprints of certain 2 ereof. 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-O O O NIL-T-52876B 38 77
13、97706 0223207 3 MIL-T-52896B(ME) (Copies of specifications, standards, and drawings required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following document(s)
14、 form a part of this specification to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. ASSOCIATION OF AMERICAN RAILROADS (AAR) Rules Governing the Loading of Commodit
15、ies on Open Top Cars ofthe Association of American Railroads. SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE Handbook. (Application for copies should be addressed to the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096.) (Industry association specifications and standards are
16、generally available for reference from libraries. using Federal agencies.) . They are also distributed among technical groups and 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take prec
17、edence. 3. REQUIREMENTS 3.1 Description. This specification covers a truck-mounted, mobile concrete mixing plant capable of transporting unproportioned and unmixed materials for producing 8 cubic-yards of mixed concrete. The mixer shall be mounted on a commercial truck chassis as specified herein (s
18、ee 3.4). The mixer shall be complete with all components furnished as standard equipment that are customarily offered with a mixer of this type whether stipulated herein or not, together with such attachments as may be necessary to enable the mixer to function reliably and efficiently in a sustained
19、 operation. component ratings shall not be increased to meet the requirements of this specification. Established Overall width of the mixer body shall not exceed 98 inches. 3.1.1 Environmental conditions. The mixer truck shall function and travel as specified herein under worldwide climatic conditio
20、ns from -25 F to +125O F and from sea level to a 5000 foot altitude. The mixing plant shall function between +32O F through +125“ F. 3.2 First article. Unless otherwise specified (see 6.21, the sample shall be subjected to first article inspection (see 4.3.land 6.3). Any change or deviations of prod
21、uction truck-mounted mixers from the approved first article 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-52896B (ME) during production will be subject to the approval of this contracting officer. Approval of the first article will not reli
22、eve the contractor of his obligation to furnish truck-mounted mixers conforming to this specification. 3.3 Mixer construction. 3.3.1 General. The mixer shall meet the following physical characteristics: Minimum materials carrying capacity - Cement - 63 cubic feet - Sand - 128 cubic feet - Water - 40
23、0 gallons - Aggregate - 182 cubic feet Each material shall be carried in a separate compartment. 3.3.2 Performance. The mixer shall be capable of continuously proportioning and mixing quality concrete at a rate of 1 cubic yard per 2-112 to 4 minutes, depending on mix design. 3.3.3 Bins and tanks. Th
24、e bins and tanks shall have the capacities specified in 3.3.1. The sand and aggregate bins shall have open tops and shall be capable of being charged by front end loaders or overhead bins, bins shall each be equipped with a pneumatic vibrator to assure continuous flow of materials. The cement bins s
25、hall be of the close-top type. A tarpaulin of sufficient size to cover the sand and aggregate bins shall be provided. Tiedown points of the bin and the tarpaulin shall be provided. The sand and aggregate bins shall be covered with screens to keep oversize rocks from entering the bins and mixing area
26、. The sand and cement 3.3.4 Quick loading cement hopper. A hopper shall be provided to fit over the standard opening in the top of the cement bin. The hopper shall be provided with a vibrating screen and hinged cover. hopper opening. accept an elephant trunk from an overhead bin. The over shall cove
27、r the entire The hinged cover shall be provided with a circular opening to The opening shall be provided with a hand operable, removable cover. 3.3.5 Water system. Water shall be supplied by a 400 U.S. gallon mounted tank(s). - The tank(s) shall be coated on the inside with corrosionresistant materi
28、al in accordance with the manufacturers standard practice. A water fill cap secured to the tank(s) by a chain shall be provided for each fill opening. The inside diameter of the fill port shall not be less than 2 inches and the fill port shall be labeled %Water“. A water level gage of the sight tube
29、 type, graduated in U.S. gallons, shall be provided and this gauge shall be mounted or protected in a manner which prevents breakage. with the water system. auger and other critical areas. gallons shall be provided to control the amount of water being added to the mix. A water pump shall be provided
30、 Awashout hose shall be provided to clean the mixing A water control valve calibrated in U.S. 3.3.6 Mixing system. reinforced rubber chute. plates. The mixing auger shall be powered. A system shall be provided to raise Mixing of the concrete shall be by an auger in a The auger shall be equipped with
31、 replaceable wear 4 0 8 O Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-5287bB 38 m 7777906 0223207 7 H MIL-T-52896B(ME) and lower the mixing chute. The mixing chute shall be equipped with an anti- splash cover to facilitate clean-out and pro
32、vide clean operation. pwo delivery chutes shall be provided with supports and hand operable fasteners to attach to the mixing chute. 3.3.7 Mix proportioning system. The continuous proportioning of materials shall be controlled by volume. furnished on the sand and aggregate bins for proportioning the
33、 mix to meet desired design strengths. encased in a drop-through housing. the mixing chamber from the respective bins by a common conveyor belt. conveyor belt shall be moved by two paralleled chains adequately supported by removable wear bars. shall be provided. weekly basis, then the oiling system
34、must be readily accessable. Adjustable volume control gates shall be The cement.shal1 be proportioned by a rotary feeder The sand and aggregate shall be conveyed to The A system to continuously oil the chains during mixing If the chain oiling system must be attended on a less than 3.3.8 Mixer drive
35、train. Power for the mixer shall be provided from the truck engine or transmission through a power take-off. shall be proportional to engine speed. The power take-off shall permit engagement without clashing with the engine running and transmission in neutral. hydraulic pump and water pump. mobile m
36、ixer manufacturer. Power take-off speed The power from the power take-off shall be transmitted to power Power take-off and controls are provided by the 3.3.9 Quick-load cement bin. A portable bin shall be provided into which bags of cement may be emptied. lifted by a front end loader and the cement
37、in it may be dumped into the cement bin on the mixer. 16 cubic feet. The bin shall be so designed that it may be The quick-load cement bin shall have a capacity of at least 3.3.10 Admixture system. .The manufacturer shall supply his commercial liquid and dry cement admixture systems. 3.3.11 Air syst
38、em. The system provided to supply air pressure for the pneumatic vibrators shall be taken from the air brake system of the truck chassis. Assure that low pressure release of truck.air brakes willnot occur. 3.4 Truck chassis! The mixer shall be mountedon a commerical truck chassis as specified in MIL
39、-T-PD-9156. 3.5 Lubrication. The truckaiounted mixer shall be capable of operating using standard military lubricants. All components requiring lubrication shall be provided with means of lubrication. mixer shall be with military lubricants applicable to this type of equipment. Initial servicing of
40、each truckmounted 3.6 Maintenance. 3.6.1 Maintainability. All major assemblies and installed attachments shall be accessible for maintenance, repair, and replacement with minimum removal of other major assemblies and installed attachments. be removed for component adjustment or maintenance shall be
41、equipped with quick- Covers or plates which must 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-5287bB 38 779770b 022LZLO 3 - - - MIL-T-52896B (ME) disconnect fastenings. Drain outlets shall be accessible. Ease of maintenance provisions sha
42、ll incorporate features insuring operating clearances for handtools and lubricating equipment, and the accessibility for service operations such as adding oil to the engine crankcase and adding oil to gear cases. nance, assembly, or disassembly operation required during testing in accordance with 4.
43、3 shall be accomplhhed by no more thaa two men (except a hoist and operator may be used as necessary) using general purpose tools normally associated with equipment of this nature. operation, the truckmounted mixer shall operate as specified herein. Each mainte- After completion of any maintenance 3
44、.6.2 Interchangeability. All parts having the same part number shall be functionally and dimensionally interchangeable. devices such as bolts, nuts, screws, and washers shall be held to a minimum number of types and sizes. Common hardware and fastening All screw threads shall be in accordance with F
45、ED-STD-HB8. 3.7 Safety. All reciprocating, rotating, or moving parts of equipment shall be guarded when such parts are exposed to contact by personnel or otherwise create a hazard. All hot surfaces of equipment, including exhaust pipes and other lines which may be subject to high operating temperatu
46、res, exposed to contact by personnel or which create a fire hazard shall be fully guarded or insulated. Exhaust or dischares from equipment shall be directed so that they do not endanger personnel or obstruct the view of the operator. equipment shall be effectivley guarded and grounded to protect al
47、l persons and objects from electrical shock hazard, Fuel tanks shall be located in a manner which will not allow spills and overflows to run onto the engine, exhaust, burners, or electrical equipment. Nonfunctional sharp edges, projecting points, and excessive length of fastening devices shall be av
48、oided. ladders shall be provided where necessary for inspection, servicing, and maintenance. and egress. All platforms, steps, and ladder rungs shall have anti-skid surfaces. Occupational Safety and Health Administration standards. 1926) 5994 shall be provided. Electrical Steel walkways and Walkways
49、 and ladders shall provide safe and unobstructed access The truek-mounted mixer shall meet the applicable requirements of the (29CFR 1910 and 29CFB A type B back-up aiarm conforming to the performance criteria of SAI3 3.8 Noise. Truckmounted mixer shall not exceed MIL-STD-1474 (see 5.1.1.1) category D 85db(A), at the operators position or other occasionally occupied positions, when tested in accordance with 4.3.2.14. If technical infeasibility is est
