calcium

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…used to bond bricks together or to bind stones and gravel to make concrete. Because there is an absence of calcium oxide we could use thermosetting adhesives. Which works like contact adhesives (cement). It is feasible but thermosetting adhesives are irreversible chemical and physical change. Which could produce some problems as once it is set it is extremely had to remove unlike contact adhesives. Therefore it is a good solution to the absence of cement.