| abstract |
The present invention relates to a corrosion resistant manhole block and a method for producing the same, which method comprises agitating a mixture comprising fly ash, blast furnace slag, silica fume, fine aggregate, coarse aggregate, water reducing agent, water and fiber, adding an activator to the mixture, The corrosion resistant concrete composition produced by re-stirring the added mixture was placed in a manhole block mold and subjected to a compaction and curing process to produce a corrosion resistant manhole block, whereby slump degradation due to silica fume and workability degradation due to activator occurred It is possible to provide a corrosion resistant manhole block of a tightly sealed structure which is not corroded by hydrogen sulfide or the like in the sewage and which is low in life cycle cost and excellent in strength and cracking than ordinary portland cement manhole block. |