Fiber material for cement reinforcement

Abstract

Provided is a fiber material for cement reinforcement, configured such that a resin A containing an isocyanate compound as a constituent component is present inside a fiber bundled body, and a resin B containing an epoxy resin as a constituent component is present on a surface of the fiber bundled body. Further, it is preferable that the resin A contains a polyol or an epoxy compound as a constituent component in addition to the isocyanate compound, the resin B contains an acrylic-modified epoxy resin or a bisphenol-A epoxy resin as a main component, the fiber bundled body has a tensile strength of 7 cN/dtex or more, and the fiber bundled body includes 50 to 3,000 single fibers. The invention is also addressed to a concrete or mortar molded article using the above fiber material for reinforcement.

1 . A fiber material for cement reinforcement, characterized in that a resin A containing an isocyanate compound as a constituent component is present inside a fiber bundled body, and a resin B containing an epoxy resin as a constituent component is present on a surface of the fiber bundled body. 
     
     
         2 . The fiber material for cement reinforcement according to  claim 1 , wherein the resin A contains a polyol or an epoxy compound as a constituent component in addition to the isocyanate compound. 
     
     
         3 . The fiber material for cement reinforcement according to  claim 1 , wherein the resin B contains an acrylic-modified epoxy resin or a bisphenol-A epoxy resin as a main component. 
     
     
         4 . The material for cement reinforcement according to  claim 1 , wherein the isocyanate compound in the resin A is a blocked isocyanate. 
     
     
         5 . The fiber material for cement reinforcement according to  claim 1 , wherein the fiber bundled body has a tensile strength of 7 cN/dtex or more. 
     
     
         6 . The fiber material for cement reinforcement according to  claim 1 , wherein the fiber bundled body includes 50 to 3,000 single fibers. 
     
     
         7 . A concrete or mortar formed body comprising the fiber material for cement reinforcement according to  claim 1 . 
     
     
         8 . A method for producing a concrete or mortar formed body comprising the fiber material for cement reinforcement according to  claim 1  and having a water/binder ratio of 40% or less at the time of kneading. 
     
     
         9 . The fiber material for cement reinforcement according to  claim 2 , wherein the resin B contains an acrylic-modified epoxy resin or a bisphenol-A epoxy resin as a main component.