1. Drying Shrinkage Presentation By Savita Goel May 17, 2002

2. Overview Test Program Test Results Data Phase II Tests

3. Specifications ASTM C 157 ASTM C 490

4. Specimens: Mortar Bars Size: 1”x1”x10” No.: 3 nos. with studs at each end along the length of the bar Total Bars Made: 144

5. Specimens: Concrete Cylinders Size: 6”x12” No.: 2 nos. with 3 demec stud points along the surface on each cylinder Total cylinders made: 108

6. Curing Temperature: 23 o C + 1.5 o C Relative Humidity: > 98 % Duration: 7 Days and 14 Days

7. Drying Mortar Bars –Temp.: 73.3 + 3 o F –RH: 50 + 4 % Concrete Cylinders –Temp.: 96 + 3 o F –RH: 20 + 4 %

8. Instrumentation Length Comparator Demec Strain Gage

9. Length Measurement Age Length measured at drying age of –4, 7, 14, 21, 28, 35, 42, 49, 56, 90, 180 and 365 Days

10. Mixtures Mortar: 24 mixtures Concrete: 12 mixtures

11. Tests Fresh Concrete –Slump (5 + 1 ½ ”) –Air Content (6 + 1 ½ %) –Unit Weight –Temperature Hardened Concrete –Compressive Strength (at 7 & 28 Days)

22. Phase II Test 25 Concrete Mixtures Based on Comp. Strength and Strength Ratio Specimens: –4”x4”x10” Concrete Bars –6”x12” Concrete Cylinders

23. Thank You ! Any Questions ?