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Cement moldings containing vegetable fiber and method for producing the same

Image Number 2 for United States Patent #6379457.

A vegetable fiber cement moulded body of the present invention includes a nitrate as an additive agent. A method of manufacturing the same includes the steps of mixing raw materials including at least a vegetable fiber material, cement and water, moulding the mixed material, and curing this molded body, wherein a nitrate is added at the time of the aforementioned raw material mixing step or the aforementioned molding step. The molded body is preferably heated at the time of the curing step. According to the present invention, a vegetable fiber cement molded body of high strength which is not easily affected by substances that inhibit cement hardening and a method of manufacturing the same efficiently and at low cost are provided.

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