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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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. 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.
ASTM CCM 14 Standard Test Method for Slump Flow of Self-Consolidating Concrete_图文_百度文库
Moisten the surface of the board wipe off excess water. Tape Measure or Ruler. Draw two centerlines on the board and two concentric circles, the first circle has a diameter of 20 inches.
Figure 3 The mix should appear uniform, with the coarse aggregate visible and evenly dispersed. The mold may be constructed either with or without a seam. H old in center position until all concrete has exited the slump cone. Historical Version s – view previous versions of standard. The slump flow test is used to determine the filling ability of self consolidating concrete SCC.
The concrete should flow out to final slump diameter with no segregation. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. If T 20 is greater than 7 seconds, the mix may be too thick high viscosity and may not flow through the reinforcing.
Therefore, this test method asmt considered applicable to self-consolidating concrete having coarse aggregate up to 25 mm [1 in.
ASTM C1611/C1611M – 14
Fill the slump cone in one lift using a funnel. To perform this test, a second person times the flow with a stopwatch. Work Item s – astk revisions of this standard. VSI Criteria 0 No evidence of segregation in slump flow patty or in the wheelbarrow or container. The filling ability gives an indication of the SCC ability to fill a form under it own weight.
Figure 2 Check the edge of the concrete on the board for excessive bleed water called a mortar halo. Link to Active This link will always route to the current Active version of the standard. Obtain the sample in accordance with IM SCC mix must be able to fill a form, passing around reinforcement, without segregation. Slightly overfill the concrete above the aetm of the mold. Place the slump cone in the center of astmm flow board.
This procedure provides instructions for determining the slump flow of self consolidating concrete in accordance with ASTM C Warning —Fresh hydraulic cementitious mixtures are caustic and may qstm chemical burns to skin and tissue upon prolonged exposure. The two diameter measurements should not be greater than two inches in difference if they are it astn indicate a sloping board.
Cone may be placed either in the inverted or upright position. For most SCC applications the concrete should flow out to the T 20 mark in 2 to 7 seconds.
ASTM C Standard
The second circle has a larger diameter, which may be 26 inches in diameter. Aggregate distribution is good and particles are carried to the outer edge of the slump flow.
Stand on the foot pieces to prevent leakage when placed in the upright position. The mold shall be provided with foot pieces and handles. If T 20 is less than 2 seconds, the mix may be too thin low viscosity and may segregate. Trowel off excess concrete from the top of the slump cone, and remove any concrete that has fallen onto the awtm around the cone.
Combining values from the two systems may result in non-conformance with the standard. 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. Report the slump flow as the average of the two diameter readings.
These notes asm footnotes excluding those in tables and figures shall not be considered as requirements of the standard.
Start timing as the cone is lifted, stop timing when slump flow reaches the 20 inch mark. The mold shall be free of dents. There is no indication of segregation or separation.
The interior of the mold shall be relatively smooth and free from projections such as protruding rivets. Check that the board is on a stable, horizontal surface. No evidence of segregation in slump flow patty or 161 the wheelbarrow or container. No rodding is required since concrete should flow easily.