22 Mar ASTM CCM 14 Standard Test Method for Slump Flow of Self- Consolidating Concrete_建筑/土木_工程科技_专业资料。Designation. Testing. • Visual Stability Index (VSI). – Based on slump flow test – ASTM C • Column Segregation Test – ASTM C • Penetration Test – ASTM C Buy ASTM C /CM: TEST METHOD FOR SLUMP FLOW OF SELF -CONSOLIDATING CONCRETE from SAI Global.
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Slightly overfill the concrete above the top of the mold. Place the slump cone in the center of the flow board. Check that the board is on a stable, horizontal surface. Trowel off excess concrete from the top of the slump cone, and remove any concrete that has fallen onto the board around the cone.
To perform this test, a second person times the flow with a stopwatch. Draw two centerlines on the board and two concentric circles, the first circle has a diameter of 20 inches.
Fill the slump cone in one lift using a funnel. There is no indication of segregation or separation. Cone may be placed either in the inverted or upright position. The mold shall be free of dents.
H old in center position until all concrete has exited the slump cone. The filling ability gives an indication of the SCC x to fill a form under it own weight. VSI Criteria 0 No evidence of segregation in slump flow patty or in the wheelbarrow or container.
If T 20 is less than 2 seconds, the mix may be too thin low viscosity and may segregate.
The second circle has a larger diameter, which may be 26 inches in diameter. The two diameter measurements should not be greater than two inches in difference if they are it may indicate a sloping board. The concrete should flow out to final slump diameter with no segregation. The slump flow test is used to determine the filling ability of self consolidating asgm SCC. The interior of the mold shall be relatively smooth and free from projections such as protruding rivets. Moisten the surface of the board asstm off excess water.
Link to Active This link will always route to the current Active version of the standard. Report the slump flow as the average of the two diameter readings. Warning —Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. No mortar halo or aggregate pile in the slump flow patty but some slight bleed or air popping on the surface of the concrete in the wheelbarrow or container.
ASTM CCM 14 Standard Test Method for Slump Flow of Self-Consolidating Concrete_图文_百度文库
These notes and footnotes excluding those in tables and figures shall not adtm considered as requirements of the standard. Appendix X1 provides a non-mandatory procedure that may be used to provide an indication of relative viscosity of self-consolidating concrete mixtures.
Historical Version s – view previous versions of standard. Tape Measure or Ruler. SCC mix must be able to fill a form, passing around reinforcement, without segregation.
Obtain the sample in accordance with IM Figure 2 Check the edge of the concrete on the aztm for excessive bleed water called a mortar halo. Figure 3 The mix should d uniform, ashm the coarse aggregate visible and evenly dispersed. Stand on the foot pieces to prevent leakage when placed in the upright position. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Aggregate distribution is good and particles are carried to the outer edge of the slump flow.
This procedure provides instructions for determining the slump flow of self consolidating concrete in accordance with ASTM C Therefore, this test method is considered applicable to self-consolidating concrete having coarse aggregate up to 25 mm asmt in.
Appendix X1 provides non-mandatory visual rating criteria that may be used to classify the ability of a self-consolidating concrete mixture to resist segregation stability.
ASTM C1611/C1611M – 14
For most SCC applications the concrete should flow out to the T 20 mark in 2 to 7 seconds. If T 20 is greater than 7 seconds, the mix may be too thick high viscosity and may not flow through the reinforcing.
The mold may be constructed either with or without a seam. Work Item s – proposed revisions of this standard. No evidence of segregation in slump flow patty or in the wheelbarrow or container. Combining values from the two systems may result in non-conformance with the standard.
Start timing as the cone is lifted, stop timing when slump awtm reaches the 20 inch mark. The mold shall be provided with foot pieces and handles. No rodding is required since concrete should flow easily.