2021-3-3 · When compared to the control mixture (0% cement change), wood ash concrete (WA1), the results were roughly comparable to the inherent strength of M25 concrete that could be used in construction, but the concrete that showed a change of Pretty low strength of M25 concrete quality was wood ash (WA2).
2021-3-23 · Chemical reaction of cement with sand and coarse aggregates [B] Evaporation of water from concrete [C] Hydration of cement [D] All the above. Answer : C 30. Minimum grade of concrete for R.C.C. should be _____,as per IS. 456-2000 [A] M10 [B] M14 [C] M20 [D] M25. Answer : C 31. A concrete mass containing 5% of voids [A] Increases its strength
63. What is the quantity of cement in Mix M20 concrete? For nominal Mix Cement consumption for M25 will be 570 kg per cum. and for Design Mix it can be optimized to 510 kg per cum. 64. Define What is unit weight of normal concrete? 145 PCF. 65. What is the difference between shear and tensile strength?