ASTM C1741-18

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Designation: C1741 − 12 C1741 − 18
Standard Test Method for
Bleed Stability of Cementitious Post-Tensioning Tendon
Grout
This standard is issued under the fixed designation C1741; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This test method is designed to determine the bleed stability of freshly-mixed cementitious grout under static pressure.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
1.3 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.(Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and
tissue upon prolonged exposure. )
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
C125 Terminology Relating to Concrete and Concrete Aggregates
C938 Practice for Proportioning Grout Mixtures for Preplaced-Aggregate Concrete
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology C125.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 bleed stability, n—of cementitious grout, resistance to bleeding.
3.2.2 bleeding, n—of cementitious post-tensioning tendon grout, autogenous flow of mixing water within, or its emergence
from, newly placed grout; caused by the settlement of the solid materials within the grout and the filtering action of strands and
wires when subjected to static pressure and capillary action.
3.2.3 grout, n—mixture of cementitious material and water, with or without aggregate and admixtures, proportioned to produce
a pourable consistency without segregation of the constituents.
3.2.4 post-tensioning, adj—referring to a method of prestressing in which prestressing steel is tensioned after the concrete has
gained sufficient strength.
4. Significance and Use
4.1 This test method is designed to evaluate the bleed stability of a freshly-mixed grout under static pressure. It can be used
in both the laboratory to qualify grout materials and in the field as a quality control test. When used to qualify grout materials,
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.41 on
Hydraulic Cement Grouts.
Current edition approved June 1, 2012Oct. 1, 2018. Published July 2012October 2018. Originally approved in 2011. Last previous edition approved in 20112012 as C1741
– 11a.12. DOI: 10.1520/C1741-12.10.1520/C1741-18.
Section on Safety Precautions, Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards, Vol 04.02.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1741 − 18
replicate tests may be specified. It is intended that the test pressure, acceptance criteria, and number of replicate tests be set forth
in the contract documents if this test method is referenced. These values will normally vary depending on the vertical rise of the
post-tensioning tendon.
NOTE 1—Appendix X1 includes a reference for an example of test pressures and bleeding limits.
4 5
4.2 The procedure for this test was developed by Schokker et al. based on previous work by Schupack.
5. Apparatus
5.1 The apparatus consists of a commercially available pressure filtration funnel, stand, pressure supply with gauge, pressure
regulator, valve, drip wick, and bleed water collection container as shown in Fig. 1 and Fig. 2.
5.1.1 Filtration Funnel—A 47-mm diameter stainless steel pressure filtration funnel with a nominal capacity of 200 mL as
shown in Fig. 2. The filtration funnel shall have removable threaded caps at both ends with a stem for connection of the gas supply
and a 7.0 6 0.5 mm inside diameter stem 90 6 1 mm long for escape of water. The base of the vessel shall contain a 35 6 1 mm
diameter stainless steel 45 μm (No. 325) screen that supports a 47 mm diameter Type A/E borosilicate glass filter (1-μm pore size)
as shown in Fig. 2. The screen shall be inserted with the woven side against the glass filter, and the funnel gasket shall be placed
above the glass filter as shown in Fig. 2. The glass filter shall cover the screen across the inside diameter of the bottom cap and
be located under the gasket when under pressure. Secure the bottom cap before filling the filtration funnel with grout. The funnel
is placed in the stand after it is filled.
5.1.2 Stand—The filtration funnel shall be attached to a stand capable of holding the funnel in the vertical position with adequate
space for the bleed water collection container. The bottom stem of the filtration funnel shall be inserted into the bleed water
collection container.
5.1.3 Gas Supply—An air or other inert gas pressure supply with a pressure regulator, an in-line shutoff valve, and pressure
gauge shall be firmly attached to the top stem of the filtration funnel. The pressure gauge shall be capable of reading pressures up
to 700 kPa with 20 kPa graduation marks.
5.1.4 Metal Drip Wick—A metal paper clip or suitable thin metal wire or rod shall be bent to direct the water squeezed out of
the filtration funnel i
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