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Concrete mixture designed to resist wearing through rubbing and friction.
Heavy industrial floors and offshore structures.
ASTM C-94, ASTM C779, ASTM C 418, C944, C 1138
Abrasion resistant concrete reduces maintenance requirements for concrete in abrasive environments.
Concrete manufactured with supplementary cementitious material.
Metakaolin is used to produce high performance, high strength concrete. It is recommended for projects such as water pipelines, bridges & dams, paving and precast applications. Use of Metakaolin contributes to:
Is a by product of coal combustion, most commonly produced by coal fired electrical generating facilities. Fly ash is a cementitious material, meaning it has certain properties that cause it to harden upon exposure to water. In the presence of Portland Cement, fly ash can develop strength characteristics very similar to cement. Fly ash is also particularly beneficial for use in hot weather as it tends to slow the generation of heat in the concrete.
A by-product of iron manufacturing, can be added to ready mixed concrete to improve durability and reduce maintenance costs. The benefits of using slag include: better workability, easier finishing, greater strength, greater resistance to chemicals and lower permeability.
Can be used for most applications when ordinary Portland cement concrete is used.Complementary/Accessory Products
Concrete tools and trowels, safety equipment (hard hats, eyewear, hearing protection and gloves)
Energy efficiency through reduction of cement demand; may contribute to LEED point(s) for recycled content.
Concrete mixtures designed to slow the rate of corrosion of steel reinforcement and stressing strands in reinforced concrete. May be used with other corrosion protection products such as silica fume and surface sealers.
Bridges, coastal balconies, marine structures and parking garages.
ASTM C-94, ASTM C-494
A slow setting concrete mixture used when extended time in a fresh state is required.
Used when a delay in setting time is desired to ensure sufficient placement, vibration or compaction time: hot weather pours, pre-stress members, bridge decks and long-haul deliveries.
ASTM C-94, ASTM C-494
Improved hardened properties, scheduling flexibility that reduces labor costs.
Concrete where aggregate is used to increase concrete density; unit weights ranging from 165 pounds to 330 pounds per cubic feet are attained. Aggregate of very high unit weight, such as barium, boron or iron ore, steel shot or punchings used.
Radiation shielding, bridge counterweights
Energy efficiency through thermal mass, durability, may contribute to LEED point(s) for recycled content (steel).
A specialty concrete mixture that includes low density aggregates that creates a hardened product with a lower unit weight than normal concrete.
Bridge decks, slabs, tilt-up walls, topping slabs, composite slabs on metal deck.
ASTM C-94, ASTM C-330
Mass concrete is "any volume of concrete with dimensions large enough to require measures be taken to cope with generation of heat from hydration of the cement and attendant volume change to minimize cracking."
Mat foundations, dams, pile caps, bridge piers, thick walls, large columns
A concrete mixture that includes silica fume as a percentage of cement weight.
Marine structures, bridges, parking structures, coastal balconies, high-rise construction.
ASTM C-94, ASTM C-1240
Shrinkage reduced concrete contains a specially formulated chemical admixture that reduces the concrete's drying shrinkage. It can be used to extend joint spacing and help reduce cracking in high value flooring.
Indoor slab-on-grade concrete construction, bridge decks, parking garages, marine structures, floors, containment structures.
Reduces drying shrinkage of concrete.
A concrete mixture designed to be pneumatically projected at high velocity onto a surface.
Shotcrete is most commonly used for swimming pool construction, but has a wide range of applications:
New structures - roofs, thin shells, walls, prestressed tanks, buildings, reservoirs, canals, swimming pools, boats, sewers, foundation shoring, ductwork, shafts and artificial rock.
Linings and coatings - over brick, masonry, earth, and rock; underground support, tunnels, slope protection, erosion control, fireproofing of steel, steel pipeline, stacks, hoppers, bunkers, steel, wood, and concrete; pipe protection, and structural steel encasement.
Repair - for deteriorated concrete in bridges, culverts, sewers, dams, reservoir linings, grain elevators, tunnels, shafts, waterfront structures, buildings, tanks, piers, seawalls, brick, masonry and steel structures.
ASTM C-94, ASTM C-1116, C-1140, ACI 506.2
Shotcrete is particularly cost effective where formwork is impractical or where forms can be reduced or eliminated; access to the work area is difficult; thin layers, variable thickness, or both are required; or normal casting techniques cannot be employed.
High slump concrete with extreme working characteristics where reduced water-cement ratios are desired.
High strength concrete, parking and bridge structures, industrial slabs, mass concrete, reinforcement crowding in structural columns, low permeability applications.
ASTM C-94, ASTM C-494
Underwater concrete is designed to exhibit superior resistance to washout of cement and fines, while impeding the blending of external water into the plastic concrete.
All types of underwater concreting where conventional concrete or placing techniques would result in a high percentage of material loss due to washout.
ASTM C-94, Army Corps of Engineers CRD-C 61
Inevitable when it comes time to repair an asphalt pavement, the typical solution is to mill and resurface. This endless cycle of repair is not only expensive and unsustainable but also creates traffic headaches for travelers.
Whitetopping provides a unique solution to this repair cycle by using the asphalt pavement's structural capacity to overlay a thin sheet of concrete onto the existing pavement. Effectively breaking the asphalt repair cycle, a concrete surface can be designed to last up to 40 years with minimal maintenance.
Structurally, a pavement system should be analyzed by first considering the strength of the existing pavement layers. Each underlying layer strengthens the base and allows the concrete surface to be thinner. In a conventional whitetopping design, no bond is assumed to exist between the concrete and asphalt surface.
The flexibility of whitetopping design allows it to be used for a variety of applications including: highways, airports, intersections, and city streets. Construction schedules are shorter since earthwork does not have to be redone, translating to fewer user delay costs for the traveling public. Entire intersections have been whitetopped in as little as 4.5 days.
While everyone knows concrete is usually more expensive in initial cost. Everybody also knows that pavements aren't built to stay open for only one year; they are expected to be permanent infrastructure. This means it is prudent to consider life cycle cost when comparing pavement alternatives. When considering construction cost savings and low maintenance costs, whitetopping easily wins the life cycle cost analysis.
The aged asphalt taxiway/apron at the New Smyrna Beach Airport in Florida exhibited severe alligator cracking. The airport officials and DOT chose to overlay the area with a concrete ultra-thin whitetopping. Nearly 200,000 sy of pavement was overlaid with 2" to 3.5" of concrete. In the design of the ultra-thin whitetopping, the engineer assumes the concrete will bond the asphalt surface. This design assumption is different from conventional whitetopping that does not bond.