Text Box: Table 3     Comparison of engineering properties for concrete containing fly ashes of differing fineness (Dhir et al., 1986) Engineering Property Design Strength (N/mm2) Fly ash fineness 3.3% 29.7% (i) Elastic modulus 20 16 17   40 23 23   60 28 27 (ii) Creep coefficient 20 1.26 1.27   40 1.11 1.13   60 1.11 1.12 (iii) Ultimate Shrinkage (x 10-6) 20 393 320   40 492 408   60 660 602 FA content = 30% by mass of PC+FA (i) elastic modulus tested at 28 days as BS 1881: Part 121, (ii) creep at 28 days loading (0.4 fcu), (iii) ultimate shrinkage at 20°C, 55% RH