What is the primary difference between a water reducer and a high-range water reducer (superplasticizer)?

The primary difference between a water reducer and a high-range water reducer (HRWR), also known as a superplasticizer, lies in the degree to which they reduce the water content of a concrete mix while maintaining the same workability, or conversely, increase the workability at the same water content. Water reducers, also called mid-range water reducers, typically reduce the water content by approximately 5% to 10%. This reduction in water content leads to a modest increase in strength and improved dur....