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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Work Item s – proposed revisions of this standard. Draw two v on the board and two concentric circles, the first circle has a diameter of 20 inches. 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 asym or container. VSI Criteria 0 No evidence of segregation in slump flow patty or in the wheelbarrow or container. If T 20 is greater than 7 seconds, the mix may be too thick high viscosity and may not flow through the reinforcing.
Aggregate distribution is good and particles are carried to the outer edge of the slump flow. Cone may be placed aatm in the inverted or upright position.
Fill the slump cone in one lift using a funnel. The filling ability gives an indication of the SCC ability to fill a form under it own weight. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Combining values from the two systems may result in non-conformance with the standard. The mold may be constructed either with or without a seam. Appendix X1 provides a non-mandatory procedure that may be used to provide an indication of relative viscosity of self-consolidating concrete mixtures.
The concrete should flow out to final slump diameter with no segregation. Obtain the sample in accordance with IM The two diameter measurements should not be greater than two inches in difference if they are it may indicate a sloping board.
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.
Figure 2 Asgm the edge of the concrete on the board for excessive bleed water called a mortar halo. Moisten the surface of the board wipe off excess water.
ASTM CCM 14 Standard Test Method for Slump Flow of Self-Consolidating Concrete_图文_百度文库
The slump flow test is used to determine the filling ability of self consolidating concrete SCC. For most SCC applications the concrete should flow out to the T 20 mark in 2 to 7 seconds.
The second circle has a larger diameter, which may be 26 inches in diameter. No evidence of segregation in slump flow patty or in the wheelbarrow or container. The interior of the mold shall be relatively smooth and free from projections such as protruding rivets. If T 20 is less than 2 seconds, the mix may be too thin low viscosity and may segregate.
Report the slump flow as the average of the two diameter readings.
Stand on aastm foot pieces to prevent leakage when placed in the upright position. Start timing as the cone is lifted, stop timing when slump flow reaches the 20 inch mark. No rodding is required since concrete should flow easily. Warning —Fresh hydraulic cementitious mixtures are caustic cc may cause chemical burns to skin and tissue upon prolonged exposure. Link to Active This link will always route to the current Active version of the standard.
To perform this test, a second person times the flow with a stopwatch. The mold shall be free of dents. Figure 3 The mix should appear uniform, with the coarse aggregate visible and evenly dispersed.
ASTM C1611/C1611M – 14
161 These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. Therefore, this test method is considered applicable to self-consolidating concrete having coarse aggregate up to 25 mm [1 in. The mold shall be provided with foot pieces and handles. Place the slump cone in the center of the flow board.