Polyamide fibers, microsilica and Portland cement composites and

Details Polyamide fibers, microsilica and Portland cement composites and Polyamide fibers, microsilica and Portland cement composites and

1988-03-28

1990-02-20

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

428395, 428688, C04B 1438

Patent

active

049023470

ABSTRACT:
A hardened cementitious composite produced using conventional mixing techniques, including a microsilica-cement mixture and randomly distributed discontinuous polyamide fibers is described. Other mix ingredients used in forming the composite are superplasticizer, water and possibly aggregates and fly ash substituting for part of the Portland cement. The microsilica particles are essential in dispersing the fibers during the regular mixing, and in enhancing the fiber-cement interfacial bond. Microsilica also reduces the alkalinity of the matrix and helps in increasing the durability of polyamide fibers in the alkaline environment of cement. With their close spacing and superior bond to the matrix of the composite, the polyamide fibers are highly effective in increasing the ultimate tensile and flexural strength and in improving the ductility and toughness of the material.

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