hollow sound from parking deck concrete

Chapter 5 Concrete Structures Contents

WSDOT Bridge Design Manual M 23-50.20 Page 5-1 September 2020. Chapter 5 Concrete Structures. 5 .0 General. The provisions in this section apply to the design of cast-in-place CIP and precast

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Hollow Sounding Tile - The Tile Council of North America

Occasionally a floor will sound hollow even when the tile is well bonded. This can occur when a mortar bed method is used and the mortar has delaminated from the supporting layer or when the subfloor itself is not sufficiently thick or well attached.

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Delam Tool - Concrete Delamination Sounding Tools

The chain drag method is not as effective in detecting smaller delaminations. These smaller areas are typically found by tapping with a small hammer. The chain drag as described in ASTM D 4580-86 is useful for initial delamination detection on large flat surfaces such as bridge and parking decks and some concrete highway slabs.

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Why does my pool deck sound hollow? - YouTube

From www.swimmingpoolsteve.com/pages/concrete.html - Steve talks about why pool decks often sound hollow and what this means for the health of the poo.

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CONCRETE TECHNOLOGY CORPORATION

The Hollow Core slab has a variety of uses including floors and roofs for buildings and parking garages decks for piers and short-span bridges lids for storm water detention vaults and lagging for retaining walls. Cast-in-place composite concrete topping may be added to provide a smooth level floor surface that serves as a horizontal

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Deck Blocks at Seven Trusts.com

Concrete deck block that accepts 4x4 and 6x6 lumber posts. View More. Eurotec 2.874-in x 7.4803-in x 7.4803-in SL PRO Line Plastic Deck Block. Pro-Line. Adjustable .

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Noise Reduction Coefficient NRC

Noise Reduction Coefficients NRC for Common Building Materials: 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Brick painted Brick unpainted Carpet indoor-outdoor

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The Structural Maintenance of Parking Garages

National Parking Association Checklist for Structural Inspection of Parking Structures Decks Are there any cracks? Do they leak? Is the surface sound or are there areas of surface scaling? Does a chain-dragging test reveal a hollow sound in any areas? Is there any evidence of concrete delamination?

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How to protect hollow-core slabs in parking structures from .

Concrete slabs will maintain their original structural integrity for as long as they are protected from contaminants—chlo-ride ions in particular. Depending on the type of protective barrier chosen the frequency of the maintenance may vary. If hollow-core slabs in parking structures are well protected and

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Precast Concrete Structural Shapes

Mountain Dwellings is 2/3 parking garage and 1/3 residential that is lo ed in Copenhagen Denmark. Designed by BIG Architects BjarkeIngles Group in 2008. It has a constructed area of 33000 square meters holding 80 apartments and 480 parking spots. The parking garage is lo ed off the street and below the apartments. It

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Concrete Slab Surface Defects: Causes Prevention Repair

silica fume concrete is prone to plastic shrinkage cracking on hot windy days. Fogging the air above the concrete and erecting windshades lessen the risk of plastic-shrinkage cracking. Concrete has a coefficient of thermal expansion and contraction of about 10 x 10-6 per C 5.5 x 10-6 per F . Concrete placed dur-

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Chain Drag Delamination Surveys Concrete Construction Magazine

A distinctly hollow drum-like sound is heard when delaminations are encountered. Chain drag surveys are particularly effective in lo ing shallow delaminations on uncovered decks. The method can& 39;t be used to lo e delaminations in the concrete below bituminous wearing surfaces although debonding between wearing surface and underlying .

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Concrete Delamination - Causes and How To Avoid Delaminated .

Here& 39;s an example. A concrete floor slab placed days ago has hardened and cured. As work from other trades continues in the area someone drops a hammer from a ladder onto the floor and an unexpected sound is heard. Instead of the clear ringing sound you would expect when metal hits solid concrete a drummy sound or loud clack draws your .

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Hollow sound beneath garage floor - Concrete Engineering .

About 1 year ago I built a new home lo ed in Raleigh NC. A few months ago I was bouncing a basketball inside my double-car garage and I noticed a hollow sound near the center of the garage along with excess vibrations when the basketball hit the floor as compared to areas around the edge of the garage near the foundation walls.

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Standard Practice for Measuring Delaminations in Concrete .

1.2.3 Procedure C Rotary Percussion 2 — This procedure consists of rolling a dual-wheel multi-toothed apparatus attached to an extension pole over the bridge deck surface. The percussive force caused by the tapping wheels will create either a dull or hollow sound indi ing any delamination.

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Determine Sound vs. Unsound Concrete - Scaling Spalling .

A delamination is a hollow horizontal plane below the surface that forms when a finish is applied before water and air can bleed out of the concrete. When crushed by traffic or a heavy load the delaminated section detaches from the slab exposing aggregate.

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How to Fill Hollows Under a Concrete Floor Home Guides SF .

Gurgling Sound Under the Bathtub ; . One symptom of a concrete floor with hollows can be cave-ins. Divets and bowls can form in the concrete around the area of the hollow or in more extreme .

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Experimental Evaluation of Concrete Slab Using Hollow Steel Pipes

performance of hollow in pre- stressed concrete sections. A hollow core slab is a precast pre stressed concrete member with continuous voids provided to reduce weight and cost. They are primarily used as a floor deck system in residential and commercial buildings as well as in parking structures

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Multi-Family Podium Construction Precast Solutions

Hollow-core can be used to support multiple floor and wall loads from above. Hollow-core is ideal for floor slabs above garage parking levels due to its inherently high fire rating and low sound transmission qualities. Hollow-core requires less field placed concrete and reinforcing steel.

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Hollow Sound Under Concrete Pool Deck DIY Home Improvement .

I have a 4ft wide poured concrete deck around my in-ground pool that is about 2 years old. In one section next to a contraction joint the concrete has the distinct hollow sound that I can hear simply from walking on it. The edge of the concrete is my lawn so i can dig down to try and find.

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hollow sounds under slab - Fine Homebuilding

If the hollow sound from foot traffic is more than you care to endure like others have mentioned you can have it pressure grouted. If there wasn& 39;t adequate reinforcing in the slab I& 39;d suspect that is something you should definitely consider to avoid all kinds of headaches down the road.

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