Use of Stone Dust in the Design of High Performance Concrete

摘要: This research evaluated the suitability of stone dust in design and production High Perfor-mance Concrete (HPC). HPC mix was designed, tested, costed a comparison concrete classes used market (Class 25, 30 35) done using Cost Benefit Analysis (CBA). The cost benefit analyzed Internal Rate Return (IRR) Net Present Value (NPV). Laboratory tests established properties obtained from mix. Compressive strength, slump, modulus elasticity were tested analyzed. Structural analysis BS 8110 for 10 storey office building to establish structural member sizes. Members Classes 30, 35 new compressive strengths 80) compared. members’ sizes area freed as result de-signing with well steel reinforcement used. To justify initial if ado- pted, (CBA) estimate increased costs versus income resulting let table space created. minimum class limited Class 25 N/mm2. shows that it is possible manufacture high strength locally available dust. sampled Mlolongo quarries achieved characteristic 86.7 N/mm2 at water cement ratio 0.32. With results structures columns spaced 8 meters center de-signed four There reduction 1.2 m wide 0.65 (over 45%) when changes 80 creating over 3% total per floor. (NPV) presented business case use HPC. 80, IRR NPV being 8% investment. by 8.64% 11.68% reduced 8.37% 80. Further needs be understand trend keeping all same. In this study optimized based on serviceability. paper provides useful information Engineers Architects inform future multi structures.