Road Construction Material

Rubber chips for this technology are coarse shredded to four to six inches in diameter. Steel may be left in the shredded tires. The cost of these tire chips is very competitive with wood chips. 

Minnesota has used close to a million tires to date for road fill. In one 100-foot section north of the Twin Cities, where the road crosses a peat bog, 3,000 cubic yards of tire chips were used. This is equal to about 81,000 tires. 

In late 1989, Minnesota tested tires for leachate and found that leaching of heavy metals, polynuclear aromatic hydrocarbons, and total petroleum hydrocarbons from tire chips could not be completely ruled out (38). Now the preferred method is to use wood chips below the water table and tire chips above the wood chips. This is expected to extend the life of the fill over using just wood chips, since wood chips degrade in the unsaturated zone. 

COMPARISON OF RUMAC AND ASPHALT-RUBBER COSTS WITH STANDARD ASPHALT COSTS 

Study Ratio of Rubberized Asphalt to Standard Costs Predictions of Life Extension 

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Building materials Road construction materials Other walls, roofing, tiles, bricks, concrete blocks, sheet glass sound barriers, signs, paving, guardrails, curbstones, crosswalk paint, surfaces of other structures paint, cement, solar panels ... 

Lightweight road construction material Playground gravel substitutes Sludge composting... 

Kupiainen et al. 2005). Iron emissions originate from the resuspension of road dust as well as from the abrasion of road construction material additionally particles liberated from processes such as engine and brake wear have to be considered (Garg et al. 2000). These supplementary iron sources are responsible for the different size distribution of iron emissions compared to the results for Ca, Mg and Si, Al emissions. 

Req ding Solid Wastes as Road Construction Materials... 

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