Please choose the correct solution to the question: How to Add Calcium to a Concrete Mix

Solution1: Dissolve calcium into water prior to mixing with concrete. Agitate the water to help the calcium flakes to dissolve. Mix concrete together as per normal using calcium enriched water.

Solution2: Dissolve plaster of paris into water prior to mixing with concrete. Agitate the water to help the plaster of paris to dissolve. Mix concrete together as per normal using calcium enriched water.

Answer format: solution1/solution2
Answer: solution1