Process for providing improved head points in concrete block construction with latex-epoxy-cement adhesive

A process for providing improved head joints in concrete block construction comprising utilizing as the adhesive in the preparation of said head joints a plastic, aqueous binder composition comprising a mixture of the following in parts by weight of solids;

• from about 20 to about 85 hydraulic cement;
• from about 2 to about 25 of a styrene-butadiene polymeric latex, said latex being a plasticizer for the composition;
• from about 10 to 50 liquid synthetic thermosetting ambient temperature curable epoxide resin and a fat acid polyamide curing agent having an amine value of 290-320 therefor wherein the resin is from about 60 to about 95 percent by weight and the curing agent is the remainder;
• together with water for curing said cement, wherein said binder composition is prepared by
• 1. preparing a first mixture comprising a blend of said cement and said epoxide resin wherein said first mixture is subjected to mixing on a compounding mill under conditions of high shear,
• 2. preparing a second mixture comprising a blend of said polymeric latex with said curing agent wherein said curing agent is dissolved in methyl alcohol, and
• 3. admixing said first mixture and said second mixture prior to use as an adhesive.