COMPOSITION AND MANUFACTURING METHOD FOR ULTRA-HIGH-STRENGTH CONCRETE MANHOLE

摘要

A composition for an ultrahigh-strength concrete manhole is provided to obtain a concrete manhole having excellent compression strength as well as excellent flexural strength without using reinforcing fibers or polyester resins. A composition for an ultrahigh-strength concrete manhole comprises a combined binder containing a binder and water, a fine aggregate and a coarse aggregate. The combined binder, fine aggregate and coarse aggregate are used in a weight ratio of 32.5-40:20-30:30-37.5. The binder comprises 90-95 wt% of special cement containing 80-96 wt% of clinker based on 4CaO.3Al2O3.SO3 and 4-20 wt% of type II anhydrite, and 5-10 wt% of silica fume. Water of 20 parts by weight or less (excluding 0 part by weight) is added to 100 parts by weight of the binder.