Precast concrete component material mixture and method of precasting

3 3 3 3 3 3 3 A precast concrete component material mixture and method of precasting, which is used to manufacture sleepers for transportation tracks, and related precast concrete components, are provided. The precast concrete component material mixture include: 891 to 963 kg/mof coarse aggregate(ca); 811 to 876 kg/mof fine aggregate(fa); pozzolan material containing 90 to 97 kg/mof fly ash and 31 to 34 kg/mof silica fume; cementing material containing 235 to 350 kg/mof cement and 78 to 117 kg/mof blast furnace slag; 122 to 165 kg/mof water; carboxylic acid superplasticizer, which is 0.7 to 2.0 wt % of the total usage of the pozzolan and cementing material; and steel fiber accounting for 0.5 to 1.0% of the total volume.