Fiber cement siding

Fiber cement siding, which is produced from a blend of cement, sand, and cellulose fibers. This blend is extruded into board, which is then cured by pressurized steam. Unlike composites, fiber cement siding does not require surface treatment. Normally, a primer is applied first, followed by another coating to achieve the desired color. 

The descriptions presented in the foregoing sections are concerned mainly with composites containing brittle fibers and brittle matrices. If the composite contains ductile fibers or matrix material, the work of plastic deformation of the composite constituents must also be taken into account in the total fracture toughness equation. If a composite contains a brittle matrix reinforced with ductile libers, such as steel wire-cement matrix systems, the fracture toughness of the composite is derived significantly from the work done in plastically shearing the fiber as it is extracted from the cracked matrix. The work done due to the plastic flow of fiber over a distance on either side of the matrix fracture plane, which is of the order of the fiber diameter d, is given by (Tetelman, 1969)... 

Properties M.w. 22,000-45,000 dens. 1.20 m.p. 283-319 C Toxicology Poison by inhalation tumorigen TSCA listed Uses Paints plastics textile fibers adhesives epoxy curing agent, hardener, emulsifier thixotrope in membranes for liq. separations for food processing in side seam cements for food-contact containers in cellophane for food pkg. 

The incompatibility of resins to masonry structure has an impact to the bond of FRP on masonry surface. Moreover, FRP may create secondary side effects that make the benefits of reversibility questionable. This occurs because of the lack of vapor permeability that leads to moisture accumulation inside the masoruy mass which favors deterioration phenomena, particularly in the case of large masonry area rapping with FRP. Furthermore, FRP or AR fiber glass textiles exhibit brittle failure mechanism when their bonding is based on adhesion and friction. In fiber grids with cement-based matrix, these effects are mitigated. 

In the past, many failures occurred cOTiceming mainly side effects due to invasive retrofitting interventions on the MHS ensembles. The current evolution in this field focuses on the development of compatible grouts, fiowable mortars, and repointing mortars for irreversible type consolidation of the mass of the masonry corpus. Besides, steel and other fiber reinforcement bonded on the surface of masonry with materials of polymeric- or cement-based matrix are used as reversible interventions. 

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