1. Presented to ACI Committee 240 Washington D. C. October 27, 2014 R.E. Neal

2. Wet – Sieved 45 um Sieve (#325) Maximum Percent Retained 34% (66% Passing)

3.  Percent of Control Mixture ◦ 115% Maximum

5.  Minus 45 micron (325 sieve)  Blaine Fineness  Particle Size Distribution (Laser Diffraction)

6. MaterialMinus 45 um Blaine Fineness m 2 /kg PSD – Median Particle Size um ASTM C 311 Water Requirement Type II PC98.783805.72100

7. MaterialMinus 45 um Blaine Fineness m 2 /kg PSD – Median Particle Size um ASTM C 311 Water Requirement Type II PC98.783805.72100 Calcined Slate 99.858024.8297

8. MaterialMinus 45 um Blaine Fineness m 2 /kg PSD – Median Particle Size um ASTM C 311 Water Requirement Type II PC98.783805.72100 Calcined Slate 99.858024.8297 Pumice Greece 98.108625.9099

10. ◦ Lab Batches ◦ Water Content ◦ Slump

11. Cementitious ContentWater gal/cu.yd.Slump Inches PC 470 Control375 25% Direct Replacement365

12. Cementitious ContentWater gal/cu.yd.Slump Inches PC 564 Control375 25% Direct Replacement36.55 ½

13. Cementitious ContentWater gal/cu.yd.Slump Inches 658 Control375 25% Direct Replacement375 ¼

14. Cementitious ContentWater gal/cu.yd.Slump Inches 470 Control375 ½ 25% Direct Replacement375 ½

15. Cementitious ContentWater gal/cu.yd.Slump Inches 564 Control374 25% Direct Replacement375 ½

16. Cementitious ContentWater gal/cu.yd.Slump Inches 658 Control374 ½ 25% Direct Replacement374 ½

17.  Destruction of Vesicular Structure Required  ASTM C 618 Fineness Requirement Inadequate  Higher Fineness Required  Blaine Fineness – Poor Indicator of NP Fineness ◦ Does not relate well to fineness of PC  Minus 325 (45 um) or PSD Better Indicator