Concrete column forming tube

A concrete column forming tube for receiving poured concrete therein to produce a concrete column and characterized by producing surface characteristics on the concrete column including a paper fiber matte finish without seam lines of the forming tube;

• said forming tube comprising:
• an elongate rigid cylindrical tube capable of receiving concrete therein to form a column and comprising partially-overlapped spirally-wound plies of paper adhered together and defining an inside wall surface having spiral seam lines thereon;
• and
• a separately formed flexible cylindrical liner positioned inside said rigid tube in a generally friction-fit relationship and comprising a generally rectangular layer of paperboard material closed on itself with its longitudinal edges abuttingly arranged and defining a seam, and a sealing tape positioned on the outside of said paperboard layer along said seam for maintaining the paperboard layer in tubular form, said paperboard layer having an inside wall surface of desired paper fiber matt texture and a thickness sufficient to bridge and cover said spiral seam lines on said inside wall surface of said rigid tube to prevent the formation of seam lines on the outside surface of the produced concrete column, and a thin plastic coating layer laminated to said inside wall surface of said paperboard layer to provide a moisture-impervious inside wall surface for said forming tube and having a thickness sufficiently thinner than said paperboard layer so that said plastic coating layer assumes the desired paper fiber matt texture of said inside wall surface of said paperboard layer to produce a concrete column with a paper fiber matt finish on the outside surface.