ASTM C185-99
(Test Method)Standard Test Method for Air Content of Hydraulic Cement Mortar
Standard Test Method for Air Content of Hydraulic Cement Mortar
SCOPE
1.1 This test method covers the determination of the air content of hydraulic cement mortar under the conditions hereinafter specified.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 Values in SI shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversion and Rounding in IEEE/ASTM SI 10, of measurements made in other units.
1.4 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.
1.4 Warning- Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 185 – 99 American Association State
Highway and Transportation Officials Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
AASHTO No.: T137
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Air Content of Hydraulic Cement Mortar
This standard is issued under the fixed designation C 185; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope IEEE/ASTM SI 10 Standard for Use of the International
System of Units (SI): The Modern Metric System
1.1 This test method covers the determination of the air
content of hydraulic cement mortar under the conditions
3. Summary of Test Method
hereinafter specified.
3.1 Prepare a mortar with standard sand and the cement to
1.2 The values stated in SI units are to be regarded as the
be tested, using a water content sufficient to give a required
standard.
flow. Compact the mortar into a measure of known volume and
1.3 Values in SI shall be obtained by measurement in SI
determine mass. Calculate the air content from the measured
units or by appropriate conversion, using the Rules for Con-
density of the mortar, the known densities of the constituents,
version and Rounding in IEEE/ASTM SI 10, of measurements
and the mixture proportions.
made in other units.
1.4 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 The purpose of this test method is to determine whether
responsibility of the user of this standard to establish appro-
or not the hydraulic cement under test meets the air-entraining
priate safety and health practices and determine the applica-
or non-air-entraining requirements of the applicable hydraulic
bility of regulatory limitations prior to use.
cement specification for which the test is being made. The air
2. Referenced Documents content of concrete is influenced by many factors other than the
potential of the cement for air entrainment.
2.1 ASTM Standards:
C 91 Specification for Masonry Cement
5. Apparatus
C 109 Test Method for Compressive Strength of Hydraulic-
5.1 Flow Table, Flow Mold, and Caliper, shall conform to
Cement Mortars (Using 2-in. or [50-mm] Cube Speci-
2 Specification C 230.
mens)
5.2 Measure—A cylindrical measure having an inside di-
C 183 Practice for Sampling and the Amount of Testing of
2 ameter of 76 6 2 mm and a depth (approximately 88 mm)
Hydraulic Cement
adjusted by standardization with water to contain 400 6 1mL
C 230 Specification for Flow Table for Use in Tests of
2 at 23.0 6 2.0°C (Note 1). For the purposes of this test, the
Hydraulic Cement
capacity of the measure in millilitres is the mass of the water
C 305 Practice for Mechanical Mixing of Hydraulic Cement
content of the measure, in grams, divided by 0.9976, no
Pastes and Mortars of Plastic Consistency
correction in mass being made for the buoyant effect of air. The
C 511 Specification for Moist Cabinets, Moist Rooms, and
measure shall have a uniform wall thickness. The thickness of
Water Storage Tanks Used in the Testing of Hydraulic
2 the wall and bottom shall not be less than 2.9 mm. The total
Cements and Concretes
mass of the empty measure shall not be more than 900 g. The
C 778 Specification for Standard Sand
measure shall be made of a metal not attacked by the cement
C 1005 Specification for Weights and Weighing Devices for
mortar.
Use in the Physical Testing of Hydraulic Cements
E 438 Specification for Glasses in Laboratory Apparatus
NOTE 1—Calibrate the 400-mL measure by filling with distilled water
E 694 Specification for Laboratory Glass Volumetric Appa- at 23.06 2.0°C to a point where the meniscus extends appreciably above
the top of the measure, placing a clean piece of plate glass on the top of
ratus
the measure, and allowing the excess water to be squeezed out. The
absence of air bubbles as seen through the glass ensures that the measure
is completely full. Care shall be taken that the excess water is wiped from
This test method is under the jurisdiction of ASTM Committee C-1 on Cement
the sides of the container before weighing.
and is the direct responsibility of Subcommittee C01.21 on Air Entrainment.
Current edition approved Jan. 10, 1999. Published May 1999. Originally
5.3 Mixer, Bowl, and Paddle, shall conform to the apparatus
published as C 185 – 44 T. Last previous edition C 185 – 97.
section of Practice C 305.
Annual Book of ASTM Standards, Vol 04.01.
5.4 Straightedge—A steel straightedge not less than 200
Annual Book of ASTM Standards, Vol 14.02.
C 185
mm long and not less than 1.5 mm nor more than 3.5 mm in operation. Immediately drop the table 10 times in accordance
thickness. with Specification C 230. The flow is the resulting increase in
5.5 Weights and Weighing Devices, shall conform to Speci- average diameter of the mortar mass, as determined with the
fication C 1005. Evaluate the weighing device for precision calipers, measured on at least four diameters at approximately
and accuracy at a total load of 2 kg. equispaced intervals, expressed as a percentage of the original
5.6 Glass Graduates—Glass graduates of 250-mL capacity, diameter. Make trial mortars with varying percentages of water
conforming to the requirements of Specifications E 438 and until the specified flow is obtained. Make each trial with fresh
E 694. mortar.
5.7 Tamper, conforming to the requirements of Test Method
9.4 Mass per 400 mL of Mortar—When the quantity of
C 109. The tamping face of the tamper shall be flat and at right
mixing water has been found that produces a flow of 87 ⁄2 6
angles to the length of the tamper.
7 ⁄2 %, immediately determine the mass per 400 mL of mortar,
5.8 Tapping Stick, a piece of hard wood having a diameter using the mortar remaining in the mixing bowl after the flow
of approximately 16 mm and a length of approximately 152
has been determined. In the determination of the mass per 400
mm. mL, do not use the portion of the mortar used in the flow
5.9 Spoon—A metal restaurant-type serving spoon not less
determination. Using the spoon, place the mortar gently into
than 230 mm in length and with a bowl approximately 100 mm the 400–ml measure in three equal layers. Tamp each layer 20
in length.
times around the inner surface of the measure. For the final
layer of mortar, overfill the 400–ml measure approximately 20
6. Temperature and Humidity
mm. The position of the tamper shall be that: the broad side of
6.1 Maintain the temperature of the room and dry materials
the tamper is p
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.