Patching and Repair
Empire Blended Products, Inc.
EMPIRE BLENDED PERVIOUS CONCRETE is a performance engineered concrete made with controlled amounts of Portland cement, coarse aggregates and admixtures which when mixed with water creates a concrete with a pore structure containing many voids that allow water and air to pass through. It is the perfect material for the environmentally conscious property owner. With its environmental and safety benefits, EMPIRE BLENDED PERVIOUS CONCRETE can provide a low maintenance and durable paving material that will assist in gaining the highly regarded LEED certification.
Consolidation is generally accomplished by rolling over the concrete with a steel roller which compacts the concrete to the height of the forms. Because of rapid hardening and high evaporation rates, delays in consolidation can cause problems; generally it is recommended that consolidation be completed within 15 minutes of placement.
Control joints should be placed if prevention of random cracking of the pavement is desired, although the joint spacing is usually larger than for conventional concrete pavements because pervious concrete tends to shrink much less. Recommended joint spacings of 20 feet are suggested.
Because setting time and shrinkage are accelerated in pervious concrete construction, joint installation should be soon after consolidation, with a rolling joint tool. Another technique, suitable for small sections, is to drive a steel straightedge to the required depth with a hammer. Saw cutting joints is also possible, but is not preferred because slurry from sawing operations may block some of the voids, and excessive raveling of the joints often results. Removing covers to allow sawing also slows curing, and it is recommended that the surfaces be re-wet before the covering is replaced.
Curing should be started as soon as practical after placing, compacting and jointing. Best practice calls for curing to begin within a maximum of 20 minutes after these procedures. High ambient temperatures and windy conditions will have more pronounced effects relative to conventional pavements and should be taken into account.
Compressive Strength: (ASTM C-39):
Flow rates through EMPIRE BLENDED PERVIOUS CONCRETE are typically around 480 inches per hour.
Unit weight: Approximately between 115 lb. per cu. ft. and 125 lbs. per cu. ft.
Do not apply to frozen surfaces or if temperature will fall below 40°F within 24 hours.
Contains Portland Cement CAS # 65997-15-1. Freshly mixed cement products may cause skin injury. Avoid contact with skin where possible and wash exposed areas promptly with water. If any product gets into the eye, rinse immediately and repeatedly with water. If ingested, do not induce vomiting and get prompt medical attention. Also contains Sand CAS # 14808-60-7. Avoid breathing dust. Prolonged exposure to dust may cause delayed lung injury (silicosis) or cancer IARC Class 2A. Wear NIOSH approved mask for silica dust. Keep Out Of Reach Of Children.
Due to the use of this product beyond our control, we assume no liability for damages of any kind, and the user accepts the product "as is" and without warranties, expressed or implied, from either Empire Blended Products or its agents. The suitability of the product for an intended use shall be solely up to the user. Our only obligation shall be to replace or pay for any material proved defective, with our liability limited to the purchase price of materials supplied by us.
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