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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ASTM C1611/C1611M – 14
Work Item s – proposed revisions of this standard. If T 20 is greater than 7 seconds, the mix may be too thick high viscosity and may not flow through the reinforcing. Combining values from the two systems may result in non-conformance with the standard. The two diameter measurements should not be greater than two inches in difference if they are it may indicate a sloping board.
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 Figure 3 The mix should appear uniform, with the coarse aggregate visible and evenly dispersed.
For most SCC applications the concrete should flow out to the T 20 mark in 2 to 7 seconds.
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 astj diameter with no segregation. 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. The second circle has a larger diameter, which may be 26 inches in diameter.
To perform this test, a second person times the flow with a stopwatch. Start timing as the cone is lifted, stop timing when slump flow reaches the 20 inch mark. Trowel off excess concrete from the top of the slump cone, and remove any concrete that has fallen onto the board around the cone.
Place the slump cone in the center of the flow board. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. The mold shall be provided with foot pieces and handles. Figure 2 111 the 16111 of the concrete on the board for excessive bleed water called a mortar halo.
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. Therefore, this test method is considered applicable to self-consolidating concrete having coarse aggregate up to 25 mm [1 in.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Obtain the sample in accordance with IM Warning —Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.
The filling ability gives an indication of the SCC ability to fill a form under it own weight.
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.
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.
SCC mix must be able to fill a form, passing around reinforcement, without segregation. Historical Version s – view previous versions of standard. Cone may be placed either in the inverted or upright position.
ASTM C Standard
Moisten the surface of the board wipe off excess water. The interior of the mold shall be relatively smooth and free from projections such as protruding rivets. Stand on asym foot pieces to prevent leakage when placed in the upright position. H old in center position until all concrete has exited the slump cone.
Matls IM , Revised 10/20/15
Report the slump flow as the average of the two diameter readings. Slightly overfill the concrete above the top asym the mold. There is no indication of segregation or separation. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.