| abstract |
The present invention relates to a neutral concrete block composition, 13 to 16% by weight of cement, 20 to 25% by weight of sand, 33 to 40% by weight of stone powder, 9 to 12% by weight of gravel, 3 to 9% by weight of water, potassium phosphate monobasic (potassuim dihydrogen phosphate) 1 to 5% by weight, phosphorus acid 0.5 to 5% by weight, silica fume 2 to 6% by weight, superplasticizer 0.5 to 3% by weight, metakaolin 1 to 5% by weight, fly ash 1 to 5 It is technically characterized to contain wt% and 0.5 to 3 wt% of the initial strength enhancer, and is a secondary concrete product used for bricks, blocks, interlocking blocks for sidewalks, shore blocks, road boundary stones, grass blocks, reinforced soil retaining wall blocks, etc. When applied to a concrete secondary product, it has the advantage of being neutralized (pH: 7.5~8.5) so that the secondary concrete product can be used in an environment-friendly way, as well as improving the physical properties of the secondary concrete product. |