Cementitious compositions and cementitious slurries for permanently plugging abandoned wells and processes and methods therefor

A hydraulic cementitious slurry comprising:

• a predetermined amount of a dry blended cementitious composition which comprises consisting of cement and CKD as major components and has with a weight ratio of cement to CKD is between about 2/3 and 3/1;
• and
• a predetermined amount of water of at least about 6 gallons per 94 lb. sack of the dry cementitious composition.

A dry blended cementitious composition comprising CKD and cement,

• wherein the cement is about 40% by weight of the dry blended cementitious composition, and
• the CKD is about 60% by weight of the dry blended cementitious composition.

A blended dry cementitious composition comprising CKD and cement,

• wherein the cement is about 50% by weight of the dry blended cementitious composition, and
• the CKD is about 50% by weight of the dry blended cementitious composition.

A dry blended cementitious composition comprising CKD and cement,

• wherein the cement is about 60% by weight of the dry blended cementitious composition, and
• the CKD is about 40% by weight of the dry blended cementitious composition.

A dry blended cementitious composition comprising CKD and cement,

• wherein the cement is about 70% by weight of the dry blended cementitious composition, and
• the CKD is about 30% by weight of the dry blended cementitious composition.