Cement composition for extrusion
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsKazuhisa Hayakawa, Tohru Chiba, Shin-Ichiro Nakamura
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Abstract
A cement composition for extrusion which is produced by incorporating, into cement mortar, 3 to 15 weight % of crushed pulp fiber, 0.2 to 1 weight % of at least one member selected from an alkylcellulose and a hydroxyalkylalkyllcellulose, and a 2% water solution having a viscosity of 80,000 cps or more allows for reduced production costs by reducing the loads of the binder material using a pulp fiber without carcinogenicitic asbestos fiber. Furthermore, it allows for excellent extrudability and provides the moldings with workability such as nailing and sawing.
Claims6
A cement composition for extrusion, consisting of 60-75 wt % cement mortar including about 50 wt % of cements and 16-21 wt % of aggregates, 3-15 wt % crushed pulp fiber and 0.2-1 wt % of at least one member selected from the group consisting of alkylcellulose and hydroxyalkylalkylcellulose in a 2% aqueous solution having a viscosity of 80,000 cps or more at 20.degree. C.
Dependencies are inferred from the claim text.