Sex dating edmonton 34 male picses - Vibration of self consolidating concrete
The slump flow test (ASTM C 1611) is similar to a standard slump test (ASTM C 143), but instead of measuring a vertical height change, a horizontal spread measurement is made instead; typical spread values range from about 20” to 30”. Note how there is almost no segregation, bleeding or variation.Other tests that are approved or are under consideration are the J-Ring (ASTM C 1621) and the Column Segregation test (ASTM C 1610).
Ordinarily, concrete is a dense, vicous material when mixed, and when used in construction, requires the use of vibration or other techniques (known as compaction) to remove air bubbles (cavitation), and honeycomb-like holes, especially at the surfaces, where air has been trapped during pouring.
This kind of air content (unlike that in aerated concrete) is not desired and weakens the concrete if left.
As a result, pouring SCC is also much less labor-intensive compared to standard concrete mixes.
Once poured, SCC is usually similar to standard concrete in terms of its setting and curing time (gaining strength), and strength.
If needed, low dosages of viscosity modifier can eliminate unwanted bleeding and segregation.