Included here are various erosion-control products, foundation products that eliminate the need for excavation, and exterior stains that result in lower VOC emissions into the atmosphere. Fluorescent lamp and ballast recyclers and low-mercury fluorescent lamps reduce environmental impacts during maintenance and disposal of luminaires.
EnviroSac woven polypropylene bags collect overage waste during clean-out of concrete ready-mix trucks, concrete pump rigs, and hoppers. The concrete can be left to cure for pick-up by loader, forklift, crane, or hoist. Lightweight EnviroSac bags come in several sizes, include high-strength lifting straps, and fold for compact storage. Bags may be made of lined, urethane coated, or uncoated material. Moisture will bleed through the uncoated material; waterproof liners are recommended for applications in which the alkaline runoff is not acceptable. EnviroSystems also has a program for recycling EnviroSac bags and provides customers with a national list of concrete recyclers for the excess concrete.
Concrete accessories include such items as anchors, inserts, expansion joints, waterstops, and products that prevent soil contamination from truck overages.
Filling the expansion joints in concrete construction is a good use for panels made from recycled newspaper or waste agricultural materials, because the strength requirements are minimal (though for radon control, less permeable joint sealants may be preferable).
Waterstops must be highly durable and corrosion resistant. Plasticized PVC is the most common waterstop material, but PVC is made with phthalates, an endocrine disruptor, and its production and disposal pose a number of environmental problems. GreenSpec lists products using alternatives to PVC such as EDPM and polypropylene.
The wastewater from washing down concrete equipment on the jobsite has a pH as high as 12 (similar to drain cleaner) and can potentially contain toxic metals. Concrete washout systems capture this wastewater for proper disposal, preventing it from entering the groundwater. These systems also minimize solid concrete waste leftover at the jobsite.
Rebar supports for concrete formwork hold rebar in place during pours and have minimal structural requirements. GreenSpec lists plastic products listed here with high recycled content, plastic.
GreenSpec also lists structural elements that serve as thermal breaks between balconies and buildings—a major area of heat loss, and one requiring special attention.
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