초록 ▼

A fiber-cement product which is capable of being formed on a Hatschek machine consisting essentially of a Portland cement binder in the amount of between about 40% and 80% by weight, natural and/or synthetic fibers in an amount of between about 1% and 15% by weight, clay in an amount of between abou

A fiber-cement product which is capable of being formed on a Hatschek machine consisting essentially of a Portland cement binder in the amount of between about 40% and 80% by weight, natural and/or synthetic fibers in an amount of between about 1% and 15% by weight, clay in an amount of between about 2% and 15% by weight, and poly(ethylene oxide) homopolymer in an amount of between about 0.03% and 0.5% by weight. The product may also contain silica and/or filler in an amount of between 10% and 40% by weight. The silica is generally used in a product which is to be autoclaved. The filler may be waste fiber-cement product or inert filler material.

대표청구항 ▼

A fiber-cement product comprising Portland cement in an amount of between about 40% and 80% by weight, fibers in an amount of between about 1% and 15% by weight, clay in an amount of between about 2% and 15% by weight, and poly(ethylene oxide) in a sufficient amount to coact with said clay in an aqu

A fiber-cement product comprising Portland cement in an amount of between about 40% and 80% by weight, fibers in an amount of between about 1% and 15% by weight, clay in an amount of between about 2% and 15% by weight, and poly(ethylene oxide) in a sufficient amount to coact with said clay in an aqueous slurry containing said Portland cement, fibers and clay to retain fines in a mat formed from said slurry.