This standard is issued under the fixed designation C ; the number immediately 1 This specification is under the jurisdiction of ASTM Committee C09 on. C Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete Standard + Redline PDF Bundle, 6, $, ADD TO CART. The ASTM C is the standard instituted by The American Society for Testing and. Materials for curing compounds that form a surface.

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Astm C309 Pdf

Notes: AASHTO M has been superseded by ASTM C All Curing materials carried over the winter must be re-tested prior to use. This list. This paper will provide background information on what the ASTM C standard is, and how a product can meet or fail to meet that standard for curing concrete. ASTM C Requirements in an Advanced Industry Forming Curing Compounds for Concrete – or ASTM C – was developed when.

White-pigmented membrane-forming compounds serve the additional purpose of reducing the temperature rise in concrete exposed to radiation from the sun. The membrane-forming compounds covered by this specification are suitable for use as curing media for fresh concrete, and may also be used for further curing of concrete after removal of forms or after initial moist curing. Note 1—This specification addresses only those properties listed in Sections 5 through 8. Membrane-forming compounds with special properties including better water retention, minimum solids content, resistance to ultraviolet radiation, acid and alkali resistance and non-interference with adhesives are described in Specification C Note 2—Solutions of silicate salts are chemically reactive in concrete rather than membrane-forming; therefore, they do not meet the intent of this specification. The values given in parentheses are provided for informational purposes only. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. These notes and footnotes shall not be considered as requirements of the standard. The allowable composition of products covered by this specification is limited by various local, regional, and national regulations. Issues related to air quality solvent emission , worker exposure, and other hazards are not addressed here. It is the responsibility of the producers and users of these materials to comply with pertinent regulations. Warning Some VOC exempt solvents used to meet the regulations are extremely flammable with low auto ignition temperatures and rapid evaporation rates. Consult the manufacturer's product information sheet for important application and safety information.

It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Note 1—This specification addresses only those properties listed in Sections 5 through 8.

Membrane-forming compounds with special properties including better water retention, minimum solids content, resistance to ultraviolet radiation, acid and alkali resistance and non-interference with adhesives are described in Specification C Note 2—Solutions of silicate salts are chemically reactive in concrete rather than membrane-forming; therefore, they do not meet the intent of this specification.

The values given in parentheses are provided for informational purposes only.

ASTM C-309 Curing Compound

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. These notes and footnotes shall not be considered as requirements of the standard.

The allowable composition of products covered by this specification is limited by various local, regional, and national regulations.

ASTM C - 11 Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

Issues related to air quality solvent emission , worker exposure, and other hazards are not addressed here. It is the responsibility of the producers and users of these materials to comply with pertinent regulations. Warning Some VOC exempt solvents used to meet the regulations are extremely flammable with low auto ignition temperatures and rapid evaporation rates.

Consult the manufacturer's product information sheet for important application and safety information. Published September Originally approved in Last previous edition approved in as C 98a.

C 03 5. When required by the downloadr, the manufacturer shall furnish the VOC content of the liquid membrane-forming compound.

The VOC content shall be determined according to Practice D or as required by the applicable specifications. It is the responsibility of the downloadr to specify and apply the product in accordance with applicable Federal, state, and local regulations. If not specified, the material shall be of a sprayable consistency.

ASTM C 309 Curing Compound

General Requirements 5. Membrane-forming compounds with a fugitive dye Type 1-D shall be readily distinguishable upon the concrete surface for at least 4 h after application but shall become inconspicuous within 7 days after application if exposed to direct sunlight.

Also read: ASTM A380 PDF

NOTE 4No laboratory test for the fugitive characteristic of the color in dyed Type 1-D compounds is provided in this specification. The disappearance of these colors is strongly dependent on the nature of the exposure and the rate of application of the compounds. Reflectance Properties 7. The membrane-forming compound shall present a uniform white appearance when applied uniformly to a new concrete surface at the specified rate of application.

Sampling 9. If sampling is done prior to shipment, the inspector representing the downloadr shall have free access to the materials being sampled and shall be afforded all reasonable facilities for inspection and sampling.

Take one sample for each lot, batch, or other unit of production in a shipment. If the liquid membrane-forming compound is in mixing tanks or vats, one third of the sample shall represent the material coming from the tank at the beginning of the filling operation, one third shall represent the material coming at the middle of the filling operation, and one third shall represent the material coming at the end of the filling operation.

If the liquid membrane-forming compound to be sampled is in containers, obtain a sample by taking a portion out of a number of containers equal in number to the next integer larger than the cube root of the total number of containers in the lot.

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The sampling agency shall mark each container represented by the sample with a suitable identification mark for later identification and correlation. NOTE 5For uniform application in the field on vertical concrete surfaces, the specified rate of application may be achieved by two coats applied at an interval of approximately 1 h. Deleterious reactions are detected by scratching the surface of a mortar specimen used for the water-retention test with a knife or screwdriver, not less than 72 h after application, and comparing with the surface hardness similarly determined of a similar specimen that has been moist-cured for approximately half as long.

Any softening of the liquid membrane-forming compound-treated surface indicated by such a comparison shall be considered sufficient cause for rejection of the compound. NOTE 6Testing for deleterious reactions need only be done for curing compounds of a new or unknown composition.

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