Rancho Santa Rosa

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Project Description: Terratech stabilized an unpaved equestrian ranch road to control dust and create a low maintenance, permanent surface.

Project Objectives: T-PRO® 500 polymer was used to create a smooth, rut-free surface for lightweight vehicle traffic and equestrian use. The existing soil consisted of cobbles, gravel and low plasticity clay material. During wet weather, the surface became soft and rutted from vehicle traffic. The ranch owner wanted to create an all-weather surface that would be low-maintenance and provide a smooth, natural looking road to preserve the rural qualities of the ranch and the surrounding land. Prior to the polymer application, soil samples were taken and laboratory tested to determine index properties. The existing subgrade was re-compacted in place and import material was mixed-in to create the wear course. The project took several days to complete and a topical seal coat was applied after the infused application cured to create a tough, long-wear surface finish. The completed road was both equestrian and vehicle friendly. Horses were able to easily stop while loping and vehicles traversed smoothly without creating dust.

Equipment Used: Grader, Water Truck with Spray Bar, Smooth Drum Roller and a Pneumatic Roller.

Application Specifications: Infused application with T-PRO® 500 polymer dosing at 0.65% by weight of material treated. Topical seal coat at a coverage rate of 100 ft²/gallon.

Maintenance Requirements: Removal of loose material from surface and annual topical re-application of polymer seal coat at a coverage rate of 150 ft²/gallon.

 

Multilayer Road Stabilization - Madain Saleh, Saudi Arabia

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Project Description: T-PRO® 500 was used to construct a polymer stabilized unpaved road for visitor access to one of Saudi Arabia's UNESCO World Heritage Sites.

Project Objectives: Terratech used T-PRO® 500 to create an access road to the best known archeological site in Saudi Arabia, located 300km from the city of Madinah. The objective of the project was to construct an all-weather road from locally available soil material and measure the improvement in engineering properties of the polymer stabilized road. The laboratory tested increase in CBR value between the polymer treated soil and untreated soil was 18%. The polymer treated soil also showed a 74% improvement over untreated soil in dry unconfined compressive strength (UCS). When tested for wet UCS values, the untreated soil, after soaking, had zero strength and became completely dissolved in the water bath. Soaked samples of soil treated with T-PRO 500 polymer remained solid and had an average UCS of 471 psi. Terratech polymer technology was accepted by the Saudi Ministry of Works as a preferred road construction method for highly sensitive environmental areas such as this UNESCO World Heritage Site.

Equipment Used: Grader, Water Truck with Hose Attachment, 10-ton Single Drum Vibrating Compactor

Application Specifications: Infused application with 0.75% polymer added and a topical seal coat at 100 ft2/gal coverage rate.

Maintenance Requirements: Removal of loose material and topical re-application of polymer, as necessary.

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Marl Soil Stabilization - Tubil, Bahrain

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Project Description: Terratech used T-PRO® 500 to improve road conditions on an industrial road.

Project Objectives: An industrial area in Bahrain was rendered impassable during wet weather. A section of the road was selected to evaluate polymer road stabilization using marl and sand materials. The road base material used for construction was a 3:1 mixture of sand and marl, a locally imported calcium carbonate deposit. The engineering properties of marl are better than sand, marl is typically blended with sand to create structural road base material, however marl looses much of its physical strength when wet and requires stabilization to maintain bearing capacity and hardness. Terratech T-PRO® 500 was infused with base materials creating a water resistant, wear course surface with excellent strength and resistance to surface deformation.

Equipment Used: Grader, Tractor with a PTO Driven Tiller, Water Truck with Hose Attachment, 10-ton Single Drum Vibrating Compactor

Application Specifications: Infused application with 1.25% polymer concentration and a topical seal coat at a rate of 120 ft2/gal.

Maintenance Requirements: Removal of loose material on the surface and a light topical re-application of polymer, on a typical 12 – 18 month cycle.

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Mission Buena Vista Access Road - Cabo San Lucas, Mexico

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Project Description: Terratech constructed a private access road for a new residential development using gravel amended in-situ soils and high performance T-PRO® 500 copolymer.

Project Objectives: The property developer wanted to retain the natural aesthetic of the surrounding landscape and use in-situ stabilization to create a durable, smooth surface road to provide functional daily access for the residents. The road was therefore engineered with both lightweight passenger vehicle traffic and occasional heavy service truck access in mind. Prior to polymer application, soil samples were taken and laboratory tested to determine index properties. The existing silty sand soils were amended with 10% gravel to create a wear resistant, dust-free surface and high load bearing capacity. The project took several days to complete and a topical seal coat was applied after the infused application to create a tough, long-wear surface finish.

Equipment Used: Grader, Tractor with Harrowing Discs, Water Truck with Spray Bar, Smooth Drum Roller.

Application Specifications: Infused application with T-PRO® 500 polymer dosing at 0.65% by weight of material treated. Topical seal coat at a coverage rate of 100 ft²/gallon.

Maintenance Requirements: Removal of loose material from surface and topical re-application of polymer seal coat at a coverage rate of 150 ft²/gallon.

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Highway Road Shoulder Stabilization - Saskatoon, Canada

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Project Description: Terratech polymer technology was used for road shoulder stabilization along Highway 16 near Saskatoon, Canada. A 1.5 m wide section of road shoulder was stabilized intermittently between asphalted sections. Vehicular wear and shoving of the aggregate from the surface caused deterioration of the shoulder and a potentially hazardous condition for trucks and cars.

Project Objectives: In order to optimize strength characteristics of the road shoulder and maximize polymer dosing efficiency, sections of road were treated with concentrations of T-PRO® 500 at 0.75, 1.0 and 1.25 percent polymer, by total weight of soil material treated. The levels of dosing were matched with the degree of wear each section of shoulder exhibited from vehicles pulling off the road, softening of edge from precipitation, and shoving of aggregate surface by trucks and cars drifting off-road along curved sections. The polymer stabilization was used to improve the surface wear resistance through improved soil shear strength. Once the road shoulder sections were treated with an infused application of T-PRO 500 and compacted into place, a seal coat was applied over the entire surface area. Terratech demonstrated that polymer technology is a cost effective, long term, low-maintenance, soil stabilization method of maintaining shoulder integrity and motorist safety.

Equipment Used: Milling Machine, Grader, Water Truck with Pressurized Spray Bar, Vibrating Pneumatic Roller.

Application Specifications: Infused application with polymer concentrations at 0.75%, 1.0% and 1.25%. All sections sealed with a topical seal coat at a coverage rate of 115 ft²/gal.

Maintenance Requirements: Removal of loose material from shoulder surface and topical re-application of polymer seal coat at a coverage rate of 110 ft²/gal.

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