What is asphalt expansion joint?
DESCRIPTION. ASPHALT EXPANSION JOINT is the “original” expansion joint filler. It is composed of a blend of asphalts and mineral fillers formed under heat and pressure between two asphalt-saturated liners. It is waterproof, permanent, flexible, and self-sealing.
What material is used for expansion joints?
Expansion Joints in Building/Construction
The material used for expansion joint fillers include low viscosity epoxy resins, and cork and woods such as southern yellow pine, redwood, or western cedar.
How many types of expansion joints are there?
Gimbal expansion joint. Universal expansion joint. In-line expansion joint. Refractory lined expansion joint.
Do you need an expansion joint between asphalt and concrete?
Generally speaking, you don’t need an expansion joint next to asphalt. Asphalt is considered a flexible pavement and expansion joints are needed predominantly for long stretches of concrete that expand.
What is the best concrete expansion joint material?
Silicone: The most recent of these materials to be discovered as a joint filler option, silicone is considered the top choice by many in the concrete world. This is because it’s both flexible and durable, allowing for expansion and contraction of the slab without any cracking or breaking of the seal.
What is fiber expansion joint?
FIBERFLEX® Fiber expansion joint is a joint filler made from proprietary wood fiber blend of treated wood fibers and additives which yields flexible, easy -to-handle boards. It is used to prevent damage during expansion and contraction of concrete.
What is the best material for concrete expansion joints?
What is the best sealant for expansion joints?
QUIKRETE® Self-Leveling Polyurethane Sealant
Expansion joints must be sealed with a flexible sealant, like QUIKRETE® Self-Leveling Polyurethane Sealant or QUIKRETE® Non-Sag Polyurethane Sealant…or an expansion joint strip, to prevent water from penetrating the joint and deteriorating the sub-base.
Where are expansion joints required?
Concrete expansion joints are particularly important where there have been consecutive concrete pours and are also useful when laying concrete within an area bordered by walls or buildings or if objects such as manhole covers need to be incorporated.
What is the distance between expansion joints?
Expansion joint spacing is dictated by the amount of movement that can be tolerated, plus the allowable stresses and/or capacity of the members. As with contraction joints, rules of thumb have been developed (Table 3). These range from 30 to 400 ft (9 to 122 m) depending on the type of structure.
What do you put between asphalt and concrete?
If the cracks are more than 2″ deep, fill them with coarse sand or crushed gravel first to create a base. Add gravel or sand into the gap until it reaches about 2” below the rim and spread evenly. Add the cold asphalt patch until it is slightly over the rim of the gap and tamp down until compact.
Can you put asphalt next to concrete?
If you’ve been thinking about updating your driveway or parking lot, you might be wondering if asphalt can be paved right over the top of the concrete. Well, the answer is yes! It is safe to pave asphalt over concrete.
How often should you put expansion joints in concrete?
Usually, expansion joints should be no farther apart than 2 to 3 times (in feet) the total width of the concrete (in inches). So for a 4 inch thick concrete slab, expansion joints should be no more than 8 to 12 feet apart.
Should expansion joints be filled?
Just remember that expansion joints should always be sealed and filled with a flexible joint sealer and never epoxied or coated over. Contraction joints can be filled in the same manner after a coating or sealer is applied if you desire.
Should you fill concrete expansion joints?
After a joint is established, it needs time to activate as the slab cures. Ideally after 90 days, the joint should be filled or sealed. Joint filling is done the full depth of the joint while sealing is only done over the surface level with a flexible material over a rod to help keep the proper shape of the joint.
Should expansion joints be sealed?
Expansion joints need to be sealed periodically to protect against water, dirt, and debris. These elements can hurt the structural integrity of concrete over time. Water can also lead to mold and interior leaks that are costly to repair.
Should you fill expansion joints?
What is the maximum distance between expansion joints?
A practical limit between expansion joints for TFR is in the range of 100′ to 200′, when these roofs are attached to light gage cold- formed purlins. Standing seam roofs are limited by the range of the sliding clips. Depending on the manufacturer, it is in the range of 150′ to 200′.
How deep should expansion joints be?
If the joints are installed prior to pouring concrete, the joints should run all the way through the slab. But if you’re cutting the joints after the slab is poured and set, they should be 1/4 to 1/2 the thickness of the slab. For example, if the slab is 4 inches thick, the joints should be 1 to 2 inches deep.
Where is expansion joint required?
Expansion joints are required in large ducted air systems to allow fixed pieces of piping to be largely free of stress as thermal expansion occurs. Bends in elbows also can accommodate this.
How wide should an expansion joint be?
The minimum allowable width of an exterior movement accommodation joint is 3/8″ for joints 8′ on center and 1/2″ for joints 12′ on center. Minimum widths must be increased by 1/16″ for every 15 degree Fahrenheit temperature change over 100 degrees from summer high to winter low.
How thick should asphalt be over concrete?
Commercial Driveways and Parking Lots
Commercial driveways and lots should use 3 inches of asphalt. Commercial driveways should also use 8 inches of granular base aggregate, while lots should use 6 inches of granular base aggregate.
Can you put asphalt over cracked concrete?
What happens if you don’t put expansion joints in concrete?
If you have a concrete floor in your commercial building, you know expansion joints are necessary to allow for the natural expansion and contraction that occurs from temperature changes. Without these joints, large cracks can travel across your floor, creating costly damage.
Should you fill driveway expansion joints?
Caulking Concrete Cracks and Expansion Joints
Even expansion joints in your concrete driveway should be caulked. They can be the biggest culprit of water under your slabs. Notice how the caulking is slightly lower than the concrete slab around it.