What is a lightweight aggregate used for?

Lightweight aggregate is a type of coarse aggregate that is used in the production of lightweight concrete products such as concrete block, structural concrete, and pavement.

What is the lightest backfill material?

Expanded Lightweight Aggregate Concrete Lightweight aggregate concrete is generally more expensive, and heavier than cellular concrete, high density polyurethane, or expanded polystyrene, but is the only lightweight fill material which will tolerate direct traffic.

What is considered lightweight aggregate?

Lightweight aggregate: Lightweight aggregate is often defined as any aggregate with a dry loose bulk density of less than 1200 kg/m3.

What is lightweight fill?

A lightweight fill is any material used to replace a heavier in situ soil to reduce the load on subgrade soils. The use of lightweight fills is increasing in many areas of the United States.

Is lightweight concrete more expensive?

The material unit cost of lightweight concrete is typically higher than that of normal-weight concrete, but the unit cost usually is more than offset by the overall reduction in concrete volume and steel tonnage for the structural system.

What does Lightweight aggregate weigh?

around 115 pounds per cubic foot
Weight of Lightweight Aggregate Concrete The weight of the lightweight aggregate concrete is around 115 pounds per cubic foot, whereas the weight of the normal weight concrete is 145 pounds per cubic foot. The less weight of light weight concrete is due to the usage of fine and course lightweight aggregate.

What is normal weight aggregate?

Normal weight aggregate is the common type of aggregates with weight 2200 to 2400kg/m3.

What is lightweight aggregate fill?

Lightweight aggregate fill used to: • Speed the construction • Reduce settlement under the roadway • Protect historic structures 25 Project area contained storm water drainage outfall structures constructed in the 1850s. • Up to 20 feet of new fill over historic structures. • LWA fill usedover the structures to minimize load.

What are lightweight fills?

Lightweight fills are materials which provide adequate bearing capacities at much lower unit weights than traditional fill materials, such as flowable fill, compacted soils or stone. Cellular concrete is a cement-based product which is essentially flowable fill with exceptionally high air entrainment (generally greater than 50%).

What type of concrete is used for lightweight fill?

Typical cellular concrete mixes for lightweight fill applications are greater than 60% air content. Cellular concrete can be either pervious or impervious. Pervious cellular concrete is excellent for lightweight fill applications where buoyancy is a concern.

What are lytag® aggregates made from?

Our lightweight aggregates from Lytag® are made from fly ash generated by coal fired power stations. Our technology heats the fly ash to 1,100°C to create a hard pellet, with a honeycombed internal structure.