Large-Scale Processing of Engineered Cementitious Composites

Large scale investigation of engineered cementitious composite (ECC) design, processing, and evaluation is undertaken up to 3 cu m (4 cu yd). In order to retain high-performance fiber-reinforced cementitious composites (HPFRCC) characteristic pseudo-tensile strain-hardening properties while transit truck mixing procedures and short mixing times are optimized, ECC design is undertaken. Tensile multiple cracking and grain size distribution criterion form the basis of material design. Both large scale (3 cu m (4 cu yd) and small scale (200 L (7 cu ft)) design procedure success is demonstrated. To establish a preliminary large-scale mixing test result statistical analysis-based preliminary design value set, there was testing of large-scale mixing specimen material properties. Tests show that for the ECC-M45 material tested with 99% confidence, tensile strain, tensile strength, and compressive strength design parameters can be set at 2.0%, 4.35 MPa (630 psi), and 60 MPa (8.75 ksi), respectively.