Truck Mixer, Agitator and Discharge Concrete Carrier Standards
Mixer and Agitator Units-The size of a unit as a mixer shall be designated on a standard Bureau rating plate by a number equal to the maximum capacity in cubic yards of mixed concrete as well as its metric equivalent.The agitator rating shall be designated on the manufacturer’s data plate.To qualify for a rating plate, the unit must conform to the requirements of these Standards.
ASTM C685 / C685M - 17 Standard Specification for Concrete ...
ASTM Standards. C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field. C33/C33M Specification for Concrete Aggregates. C39/C39M Test Method for Compressive Strength of Cylindrical Concrete Specimens. C94/C94M Specification for Ready-Mixed Concrete. C125 Terminology Relating to Concrete and Concrete Aggregates
Guard requirements for concrete mixers with loading skips ...
Nov 02, 2000 · As you correctly stated in your letter, concrete mixers with loading skips one cubic yard or larger are covered under 29 CFR §1926.702, Requirements for equipment and tools, in OSHA's concrete and masonry standard. You describe a concrete mixer that has a skip of less than one cubic yard.
Can concrete be mixed in mixer?
UNIT STANDARD TITLE: 116582 : Supervise the batching and mixing of concrete by mass using a concrete mixer : ORIGINATOR: SGB Civil Engineering Construction : PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY - FIELD: SUBFIELD: Field 12 - Physical Planning and Construction: Civil Engineering Construction : ABET BAND: UNIT STANDARD TYPE: PRE-2009 NQF LEVEL: NQF LEVEL: CREDITS
Concrete mixer - Wikipedia
Vertical axis mixers, most commonly used for precast and prestressed concrete. This style of mixer cleans well between batches, and is favoured for coloured concrete, smaller batches (typically 0.75–3 m 3 or 0.98–3.92 cu yd), and multiple discharge points.
Batching, Mixing, Transporting, and Handling Concrete, Chapter 10
2. Shrink-mixed concrete is mixed partially in a sta-tionary mixer and completed in a truck mixer. 3. Truck-mixed concrete is mixed completely in a truck mixer (Fig. 10-6). ASTM C 94 (AASHTO M 157) notes that when a truck mixer is used for complete mixing, 70 to 100 revolutions of the drum or blades at the rate of rotation designated by
About - Volumetric Mixer Manufacturers Bureau (VMMB)
The bureau was created to develop a set of standards for the manufacture and performance of volumetric mixers and to work with the NRMCA in promoting the concrete industry (much in the same way as the Truck Mixer Manufacturers Bureau (TMMB)). In February of 2001, the first addition of VMMB 100-01 - the Volumtric Mixer Standards, was published.
Mix designs for concrete block
crete masonry unit (CMU) is an important step in producing high-quality units. A well-proportioned mix can improve a unit’s physical properties (compressive strength, unit weight, absorption) so they meet or exceed ASTM C 90 Standard Specification for Load-Bearing Concrete Masonry Units. Additionally, the right mix proportions can improve CMU
TYPICAL SIZES AND SHAPES OF CONCRETE MASONRY UNITS - NCMA
In addition to these standard sizes, other unit heights, lengths, and thicknesses may be available from local concrete masonry producers. Standard Specification for Loadbearing Concrete Masonry Units, ASTM C90 (ref. 1) is the most frequently referenced standard for concrete masonry units. ASTM C90 includes minimum face shell and web thicknesses ...