1. Acker V. A. (1997).Recycling of concrete at a precast concrete plant. Sustainable Construction Part 321-332
2. ASTM. C39 Compressive strength of cylindrical concrete specimens.
3. ASTM. C192 Making and curing concrete test specimens in the laboratory.
4. ASTM. C617 Capping cylindrical concrete specimens.
5. ASTM E 564 - 2000 Standard Practice for Static Load Test for Shear Resistance of Framed Walls for Buildings.