03 00 00 Concrete

Category Archives: 03 00 00 Concrete

Mix Design Fundamentals: Considerations for concrete for slabs-on-ground

Photo © BigStockPhoto/Theerapol Pongkangsananan

Interior concrete should not crack or curl excessively requiring grinding before the flooring can be installed; exterior concrete should not crack or deteriorate prematurely from freeze-thaw cycles. Some argue concrete will always crack, and nothing can be done about it. This is most often an excuse when poor design or poor placement has resulted in excessive cracking or the real problem is too much mix design water, lack of welded wire reinforcement, or too little aggregate and poor curing methods.

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Enhancing Energy Performance with Balcony Thermal Breaks

All images courtesy Schock USA

This article examines how a building’s energy performance can be enhanced with structural thermal breaks for balcony connection. New engineered solutions can assist mid- and high-rise building project teams in complying with continuous insulation (ci) code requirements. These structural connections are especially important to address in multi-family specifications because thermal bridging for every residential unit in the structure can add up to significant heating and cooling loads.

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How Thin is Too Thin?

Typical flat-plate construction. Photos courtesy SGH

Evaluating slab thickness in reinforced concrete flat-plate construction
by Dimitri Papagiannakis, PE

Reinforced concrete flat-plate construction is popular among mid- and high-rise residential construction projects. It provides a great deal of flexibility in the placement of the structure’s vertical load-carrying elements (i.e. columns and walls) without sacrificing the efficiency of the floor framing—as could potentially be the case with steel or masonry.

In the project’s early stages, structural engineers are often asked by architects …

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