For high density blocks portland cement and aggregate usually sand and fine gravel are used as a raw material.
Hollow concrete blocks for retaining walls.
W x 4 in.
For low density blocks industrial wastes such as fly ash or bottom ash are used as the primary raw materials and are often called cinder blocks breeze blocks in different parts of.
However hollow concrete block walls are not structurally very strong and will not resist the flexural stress that a wall is subjected to causing them to collapse easily.
L x 12 in.
Building walls using hollow concrete block is an economical means to creating a structure.
The terra force l15 interlocking mortarless concrete hollow block retaining wall system provides the solution to projects requiring soil retaining walls erosion protection garden terracing and reinforced slopes.
H bluestone tumbled concrete garden wall block 20 pieces 6 5 sq.
Interlocking retaining wall block uk for garden landscaping soil erosion control.
Rockwood retaining walls lakeland i 8 in.
Ft pack model 3000180 19.
Uses range from landscaping garden walls and terraces as well as civil engineering projects.
The depth and size of the foundation will vary depending on the size of the concrete block wall and the weight it must support but a typical freestanding wall requires a foundation that is about twice as wide as the wall itself and which extends about 1 foot down below the frost line.
Retaining wall structure is commonly constructed to retain earth mass or back fill materials.