Apr 22, 2011 · For a new parking garage floor with specified 5% to 8% air entrained concrete, and a urethane waterproofing membrane 60 mils thick, a wood float finsh is too rough. The …

May 21, 2013 · Excerpt from A23.1 "7.5.4.3.2 Exterior or air-entrained concrete One or more passes of a magnesium float or concrete broom shall be made at suitable time intervals to …

Feb 4, 2008 · We specified 3500 psi non-air entrained concrete at slab on grade for a commercial project, and the GC poured 3500 psi air entrained concrete. Does it make a difference? I …

Jul 23, 2012 · Perhaps a way to minimize problems associated with finishing of air-entrained concrete slabs is to specify in (Div 3 of Specicification and Structural Notes)acceptable …

Jun 23, 2016 · The engineer who wrote the specifications states that the air entrainment is required for workability of the concrete. This seems to be an issue of means and methods. …

Nov 2, 2011 · If you decide to specify air-entrained concrete, I would suggest conforming to codes based on the type of exposure. For example, ACI 318-02, Table 4.2.1 gives total air content of …

Jul 29, 2005 · The summerized specs read: for normal weight concrete air content = •no entrained air for concrete placed in foundation •5% +- 1.5% entrained air UNO •3% +- 1.0% entrained air …

Aug 25, 2010 · So freeze/thaw is expected. The drawings specify 4,000 psi and 6% +/- 1.5% air content. I received documents of (2) samples which tested (3) cylinders each. One sample …

Dec 28, 2003 · It is somewhat similar with air entraining, the microscopic entrained air bubbles don't allow quite as dense of a surface finish. It is fine for exterior work where you trade-off …

Aug 5, 2009 · In my area, air entrained concrete is used more often than non-air entrained. Further, most slabs get hard troweled finishes. The article JAE provided is a good one and …