7.17 : フェロセメント

Ferrocement comprises multiple closely packed layers of mesh or fine rods entirely encased in cement mortar.

It is substantially slimmer compared to standard reinforced concrete. It can be shaped without conventional molds, followed by a finishing process through hand-applied plaster, mortar, or shotcreting.

Typically, the mortar matrix used in ferrocement is made from Portland cement, combined with well-graded sand and, occasionally, small gravel tailored to the mesh's type and size.

Reinforcing mesh materials are available in a broad array, including woven or interlocking chicken wire, welded steel mesh, expanded metal lath, and punched or perforated sheets.

Non-metallic reinforcement encompasses materials such as natural organic fibers and glass fibers, which are configured into a two-dimensional mesh.

The primary benefits of ferrocement include reduced weight of elements owing to their slimness, considerable tensile strength, and the ease of molding into any desired shape.

Ferrocement is used for specific applications such as prefabricated structures, swimming pools, silos, water tanks, and uniquely shaped roofs. These uses show better crack resistance compared to regular reinforced concrete.