AASHTO T 21M/T 21 - Standard Method of Test for …

Standard Method of Test for Organic Impurities in Fine Aggregates for Concrete This test method covers two procedures for an approximate determination of the presence of injurious organic compounds in fine aggregates that are to be used in hydraulic cement mortar or concrete....

AASHTO T 21 : Standard Method of Test for Organic ...

This test method covers two procedures for an approximate determination of the presence of injurious organic compounds in fine aggregates that are to be used in hydraulic cement mortar or concrete.

organic impurities in aggregate – Grinding Mill China

Organic Impurities in Fine Aggregates: Organic impurities, usually in the form of tannic acid and its derivatives, are typically present in fine aggregates such as sand. » Learn More ASTM C 40 Organic Impurities in Fine Aggregates …

UFGS 03 37 00 Preplaced-Aggregate Concrete - wbdg.org

Impurities in Fine Aggregates for Concrete ASTM C40/C40M (2016) Standard Test Method for Organic Impurities in Fine Aggregates for Concrete ASTM C441/C441M (2017) Standard Test Method for Effectiveness of Pozzolans or Ground Blast-Furnace Slag in Preventing Excessive Expansion of Concrete Due to the Alkali-Silica Reaction ASTM C494/C494M (2017) Standard Specification for …

CCANZ - Impurities and Other Harmful Materials

Besides reactive minerals, aggregates may contain other impurities, such as organic matter, which are harmful to concrete. Organic matter, such as that derived from decaying vegetation, is capable of delaying setting and hardening of concrete.

C40-Organic Impurities in Fine Aggregates for Concrete

Highway and Transportation Officials Standard AASHTO No.: T 21. Standard Test Method for Organic Impurities in Fine Aggregates for Concrete1. This standard is issued under the fixed designation C 40; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

Deleterious Substances in Aggregate- Alkali-Aggregate ...

However, this test does not confirm the adverse effect of the organic impurity, because high organic content does necessarily mean that the aggregate is not fit for use in concrete For this reason, strength test on mortar with questionable sand as per ASTM C 87-90 is recommended.

ORGANIC IMPURITIES IN FINE AGGREGATE – …

If aggregate contains organic impurities it may not be suitable for inclusion in concrete. Organic impurities, usually tannic acid and its derivatives, may interfere with the chemical reactions of hydration.

ASTM C40/C40M - Standard Test Method for Organic ...

scope: This test method covers two procedures for an approximate determination of the presence of injurious organic impurities in fine aggregates that are to be used in hydraulic cement mortar or concrete.

Standard Test Method for Organic Impurities in Fine ...

Organic Impurities in Fine Aggregates for Concrete1 This standard is issued under the fixed designation C40; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript

ASTM C40 Standard - Construction Materials Testing …

ASTM C40. Related Standards: ASTM C33, C87, C125, C702, C1005, D75, D1544, AASHTO T21. Organic Impurities in Fine Aggregates for Concrete

ASTM C40 Standard Method of Test for Organic …

A fine aggregate source shall be considered to contain injurious organic impurities when the aggregate and sodium hydroxide solution has a color that is _____ the standard color.

Standard Test Method for Organic Impurities in Fine ...

1. Scope. 1.1 This test method covers two procedures for an approximate determination of the presence of injurious organic impurities in fine aggregates that are to be used in hydraulic cement mortar or concrete.

Organic Impurities in Fine Aggregate for Concrete

ORGANIC IMPURITIES IN FINE AGGREGATE FOR CONCRETE TXDOT DESIGNATION: TEX-408-A CONSTRUCTION DIVISION 2 – 2 EFFECTIVE DATE: DECEMBER 2016 4.4 Bring the solution level up to the 207 mL (7 fl. oz.) mark, stopper, and shake again.

SPECIFICATIONS FOR REINFORCED CAST-IN-PLACE CONCRETE

ASTM C 40, Standard Test Method for Organic Impurities in Fine Aggregates for Concrete ASTM C 42, Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

5 Aggregate Specifications and Requirements - in.gov

fine aggregate for use in other types of construction. The limitations on the amount of organic impurities allowed in fine aggregates are determined by the test method for organic impurities

Organic Impurities - Special Tests - Aggregates | FORNEY LP

Organic Impurities Detects the presence of organic compounds in fine aggregate samples. A positive test result indicates need for further tests prior to using source material in …

ELE International - Organic Impurities in Fine Aggregate

Organic Impurities Test • Meets ASTM and AASHTO specifications. • Includes all items necessary to perform test. The Organic Impurities Test is used to determine the presence of injurious organic compounds in sand to be used in cement mortar or concrete.

MATERIAL SPECIFICATION FOR AGGREGATES - CONCRETE - …

C 87-83 (1995) Effect of Organic Impurities in Fine Aggregate on Strength of Mortar C 330-99 Lightweight Aggregates for Structural Concrete C 666-97 Resistance of Concrete …

Standard Test Method for Organic Impurities in Fine ...

GeoTesting Express is a provider of Aggregate Testing Services - ASTM C40,Standard Test Method for Organic Impurities in Fine Aggregates for Concrete

MATERIAL SPECIFICATION FOR AGGREGATES - CONCRETE

C 87/C 87M-10 Effect of Organic Impurities in Fine Aggregate on Strength of Mortar C 330/C 330M-14 Lightweight Aggregates for Structural Concrete C 666/C 666M-15 Resistance of Concrete to Rapid Freezing and Thawing

Standard Test Method for Organic Impurities in Fine ...

4.1 This test method is used in making a preliminary determination of the acceptability of fine aggregates with respect to the requirements of Specification C33 that relate to organic impurities.

CHAPTER 4 AGGREGATES - Civil Engineering Department

Aggregates a) Organic Impurities: • Consists of products of decay of vegetable matter. The organic impurities may interfere with the process of hydration of cement. This affects the rate of gaining strength. b) Clay and Other Fine Materials: • Found as surface coatings which interfere with the bond between aggregate and the cement paste. Affects the strength and durability of concrete ...

Organic Impurities Test Set - Gilson Co.

Deleterious organic materials in fine aggregates can be easily detected with the Organic Impurities Test, a simple, widely-used test. Samples are mixed in a special graduated colorless glass bottle with a 3% sodium hydroxide solution, then allowed to stand for 24 hours.

HOW TO ASSESS THE QUALITY OF FINE AGGREGATES - …

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Organic Impurities in Fine Aggregates for Concrete - …

Test Method Title Organic Impurities in Fine Aggregates for Concrete Reference Number AASHTO T 21 Material. Aggregate. Test Property. Organic content. Description of Test

Standard Test Method for Organic Impurities in Fine ...

This test method covers two procedures for an approximate determination of the presence of injurious organic impurities in fine aggregates that are to be used in hydraulic cement mortar or concrete.

C87-Effect of Organic Impurities in Fine Aggregate on …

Standard Test Method for Effect of Organic Impurities in Fine Aggregate on Strength of Mortar1. This standard is issued under the fixed designation C 87; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

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