3 Feet Concrete Around Pool

Physical Deck Construction

Minimizing Pond Pool Structural Problems Due to Concrete Deck Structure

Expansion and Wrinkle in Concrete Construction

Virtually of the states in the swimming pool structure manufacture know that many materials expand and contract with temperature change. How many of us know how important proper trade practices are in minimizing bug due to temperature acquired expansion and wrinkle? For example, concrete is i of the about highly utilized materials in our industry today, yet I consistently encounter swimming pools damaged past expansion and contraction of adjacent concrete flatwork.

The near of import scrap of information to retrieve is the expected expansion in concrete caused by temperature change. Betwixt the heat of summertime (pool deck surface at 130º to 140º) and the dead of winter (pool deck surface at 30º to 40º) we can expect at least a 100º temperature change. The critical number to remember is that a 100 foot wide section of concrete will expand approximately three/4 of an inch with a 100º temperature change. The expansion in bottom widths of physical can be hands determined by proportioning the three/4" per 100 anxiety. The forcefulness of expanding concrete is very loftier and can easily shear off the coping or bail beam without properly installed isolation joints.

Mastic Joints

The mastic joint between the pond puddle physical decking and the pool coping/bond beam is an extremely important component of a swimming pool and must be properly installed. The purpose of this joint is to isolate concrete deck movement from the pool coping/bail beam assembly. Every bit discussed above, concrete flatwork including pool decks expand and contract with temperature change (up to 100° of variation tin be expected). Without the installation (and proper maintenance) of a flexible mastic articulation between the swimming puddle decking and the puddle coping, movement caused past expansion and contraction of the puddle deck will ofttimes cause dislodged coping, tile and horizontal cracking in the water line tile. This mastic joint must extend the full depth of the concrete decking so that no portion of the physical deck tin use pressure level against the coping or any portion of the puddle construction.

A diagram indicating proper construction joint technique and the effects of improper articulation techniques is accompanying labeled as exhibit "A." As indicated on the accompanying diagram, dislodging of the puddle coping, horizontal cracking in the water line tile and shearing of the bail beam is frequently the consequence of improper installation of the mastic joint. Proper installation of the mastic joint is normally the responsibility of the physical pool decking installer.

The lack of adequate maintenance of the mastic articulation may result in a loss of expansion protection and can cause the aforementioned problems that are experienced without the installation of the mastic joint.

Cantilevered Concrete Puddle Decking

Cantilevered physical pool decking must also be properly installed to isolate concrete deck movement due to temperature expansion and other causes from the puddle coping/bond beam assembly. The proper construction techniques basically requires the leveling of the height of the bail axle and then the installation of a bond breaker or sideslip articulation on top of the leveled beam prior to pouring the physical deck. This is shown on the accompanying diagram labeled exhibit "B." By not following the proper construction techniques, the waterline tile may become partially practical to the cantilevered deck (which volition result in horizontal cracks in the tile) or deck movement may shear off the leveling mortar course or the summit of the bond axle. The result of improper construction techniques is also shown on exhibit "B".

No steel reinforcing should exist extended from the bond beam into the pool deck. Further, the new cantilevered concrete deck should have no direct contact with the bond beam of the pool especially immediately backside the bond beam.

Bonding of the Leveling Course of Mortar

Reoccurring horizontal cracking and dislodging of the h2o line tile can also be caused by the unbonding of the mortar or concrete layer used to level the meridian of the bond axle elevation prior to coping or cantilevered concrete deck awarding. This unbonding, most likely, has been caused by improper structure techniques used in the awarding of the mortar or physical layer to the tiptop of the lower bond beam pinnacle.

It is very important that correct procedures be followed to assure proper bond of this mortar course to the existing bond beam. The following are recommendations on correct construction techniques for attaining proper bonding of new materials such as masonry, tile, gunite and concrete to existing similar materials:

Existing surfaces must exist sound, complimentary of defects, make clean and free of bail inhibiting materials.
Existing surfaces must be roughened by chipping or other suitable means to provide an open pore structure. All loose, cracked or deteriorated materials must exist removed.
Clean existing surfaces by h2o blasting.
New textile should be applied over cement paste or another approved bonding agent, which has been brushed onto the substrate (existing material) for absorption into the pore structure. The new material shall be applied before the cement paste or other approved bonding agent "skins over" or starts its "setting phase."
Saturated surface dry condition of the substrate shall exist maintained to prevent premature drying of the bonding paste.

Following these recommended practices will minimize problems in attaining proper bonding between these materials and volition provide quality results.

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