Page 86 • March 19, 2022 • www.constructionequipmentguide.com • Asphalt, Concrete, Paving, Compaction & Milling Section • Construction Equipment Guide
Bridge Deck Rehabilitation...
HEM Paving Produces New Models for Overlay Projects Many are excited about • certain products have no The SFP1200 is perfect for thin overlays the Infrastructure Bill and volatile chemicals odors — common in bridge deck rehabilitation work. It has a standard paving width of 12 what it means for expanding zero VOC. ft. and can be extended to 14 ft. if required. our nation’s roads, bridges Bridge deck overlays and highways. In addition to have traditionally been new projects, a point of applied using batch mixers, emphasis needs to be on the forms and screeds. While current condition of adequate, many contractors America’s roads and who specialize in this type of bridges. work have moved towards The American Society of volumetric mixer units to Civil Engineers (ASCE) deliver the materials and gave America’s bridges a self-propelled paving equipSafety and Condition rating ment for finishing. of C+. A major contributor to HEM paving equipment this poor rating is the age of manufactures two different our bridge structures. models of overlay paver. Bridges are built with an Both models are modified approximate lifespan of 50 slip form pavers with paving years — the current average pan system designed for age of a bridge in the United poly and other blends. These States is 42. pavers are specifically Of the approximate designed for thin and ultra610,000 rural and urban thin bonded overlays — bridges in the United States, including UHPC, polymer more than 24 percent are and synthetic-reinforced. considered functionally Self-propelled, lightobsolete or structurally defiweight and easy to operate cient. The stresses affecting the nation’s bridges will only hour — less downtime/traffic disruption and the dollars and maneuver, the HEM overlay pavers are ideal for increase as traffic volumes rise and the demand for heavier associated with them; bridge deck overlays, as well as mainline overlay and • produces a strong bond yet has high elasticity, making it whitetopping projects. The SFP1200 is practical for thin semi-freight loads grows. One solution is bridge deck rehabilitation, including and freeze-thaw resistant; overlays common in bridge deck rehabilitation work. It • is compatible with both steel and concrete decks; and involving a bridge deck overlay system. Overlays have been has a standard paving width of 12 ft. and can be extended in use for many years and can take many to 14 ft. if required. It features a front spreadforms, but common use, best practices and er auger, stainless steel paving pans, panhigh production are just now becoming mounted vibrators, automatic front and rear mainstream. steering and hydraulic sensors for grade and While there are different manufacturers steering. A 67hp diesel engine delivers the and different materials being used successpower for the paver, which is standard with a fully, the different products have similar rubber track drive, adjustable side forms, a characteristics. They quickly develop a lower work platform and operator’s station. high tensile strength that seals, protects and The HEM SFP1800 overlay paver has all extends the life of bridge decks by creating the features of the SFP1200, but it has a deepa highly durable, flexible and waterproof er, heavier frame, which allows it to span to surface. wider paving widths — up to 20 ft. In addition, In addition to the protective seal, the the 74-hp diesel engine also allows for other bridge deck overlay: paving options, such as a tube roller paving • provides increased pavement grip in package and a longer paving pan system, both wet or dry conditions resulting in fewer of which are ideal for tear-out and replace accidents and more saved lives; panel and patch work. • is significantly lighter than the typical For projects requiring an aggregate applicaconcrete overlay which requires a thicker tion to the paved material, HEM’s AG1800 application; aggregate spreader is manufactured to match • reduces the bridge deck deterioration the SFP1200 overlay paver in paving width. rate, which also reduces maintenance The unit has a 67 hp diesel engine, a lower costs; work platform and an operator’s platform. • is resistant to chemicals that cause corAs a system the HEM overlay pavers and rosion — fuel, deicer and motor oil; HEM AG1800 will reduce labor costs, provide • reduces stopping distance, by increasa professionally paved surface and accurately ing skid resistance and hydroplaning resistdosed aggregates to conserve material, and ance — according to the FHW, 70 percent avoid unnecessary cleanup, according to the of wet pavement crashes can be affected by The HEM SFP1800 overlay paver has all the features of the SFP1200, but it has company. a deeper, heavier frame which allows it to span to wider paving widths — up friction improvements; For more information, call 319/824-5551 or • is fast curing — approximately one to 20 ft. email sales@hempaving.com.
