I have built a dry stacked concrete block wall as a fence around our home. I am wondering if I should use premixed cement or mix it myself. What is the best mix recipe for a Surface Bonding Cement mix?
I'm not sure what you mean by a Surface Bonding Cement? What is it's purpose and how would you apply it? If it's a dry stacked wall why do you need cement?
Your location will influence the decision to buy premix or use a DIY mix. If you can easily buy the premix locally, that will probably be your best choice. The premix will usually have a better feel and probably performance because the manufactures have the ability to engineer the product on a much larger scale than can be done onsite. Since the original guide was published there have been many improvements to the available additives. The Calcium Chloride and Calcium Stearate may no longer be the best choice for surface bonding mix.