| 摘要 |
The present invention relates to a rapid hardening cement concrete composition for a boundary block, a method for producing a patterned boundary block using same, and a patterned boundary block produced by same. The composition comprises: a special admixture of 0.01-15 wt%, a rapid hardening cement binder of 10-35 wt%, a fine aggregate of 15-50 wt%, a coarse aggregate of 20-60 wt%, and water of 0.1-15 wt%. The special admixture comprises: a polyethylene vinyl acetate resin of 40-98 wt%, a polymethyl methacrylate resin of 0.1-30 wt%, a polyvinyl acetate-vinyl versatate resin of 0.1-20 wt%, a polystyrene-butyl acrylate resin of 0.01-20 wt%, and starch of 0.01-20 wt%. By means of the present invention, the special admixture mixed with the composition can reduce a water-cement ratio, can improve the leveling, workability, ductility, flexural strength, bonding strength, durability, and retentivity of the composition, and can prevent cracks. Industrial wastes can be recycled to be used as the rapid hardening cement binder so that the composition is useful in terms of recycling. The water-cement ratio is effectively reduced even when a small amount of the special admixture is added, so that the composition can effectively express a higher strength and a better durability than existing cement concrete compositions. |
