11-17-2013, 04:25 AM
steel tie wire effective to tie rebar together
wire mesh and glass fiber added will prevent surface cracks - important to keep the water from penetrating down to the embedded rebar and causing an internal expansion due to rust leading to the failure of the concrete
Concrete comes in many flavors - using a higher grade also increase compressive strength additives also available - my favorite is the lighter than water air entrained concrete
The downside of concrete is that it has poor shear quality --- shear force resistance is what prevents eq damage - mostly seen as shear walls and massive concrete foundations - with lots and lots of steel provided for shear resistance in modern designs
pre stress / post tension steel cabling found mostly on tilt ups....
the referenced documents in this link - will provide way more information than most want to know..... http://www.astm.org/Standards/C94.htm
wire mesh and glass fiber added will prevent surface cracks - important to keep the water from penetrating down to the embedded rebar and causing an internal expansion due to rust leading to the failure of the concrete
Concrete comes in many flavors - using a higher grade also increase compressive strength additives also available - my favorite is the lighter than water air entrained concrete
The downside of concrete is that it has poor shear quality --- shear force resistance is what prevents eq damage - mostly seen as shear walls and massive concrete foundations - with lots and lots of steel provided for shear resistance in modern designs
pre stress / post tension steel cabling found mostly on tilt ups....
the referenced documents in this link - will provide way more information than most want to know..... http://www.astm.org/Standards/C94.htm