What is the outcome of using a water-reducing admixture in concrete?

Using a water-reducing admixture in concrete is primarily aimed at decreasing the water-cement ratio without affecting the workability or slump of the mixture. This outcome is crucial in enhancing the overall strength and durability of the concrete while maintaining consistency and ease of handling during placement.

By reducing the water content, the admixture allows for the production of a denser concrete that can achieve higher compressive strengths. It also facilitates the production of high-strength concrete mixtures that may be required for demanding structural applications.

Maintaining the slump while decreasing the water content means that the workability of the concrete is preserved, which is essential for effective placement and finishing. This characteristic makes water-reducing admixtures particularly useful in various applications where the desired strength and performance of the concrete need to be maximized without compromising workability.

The other options don't accurately describe the primary effects of water-reducing admixtures. They may relate to different attributes of concrete but do not capture the fundamental role of these admixtures in optimizing water content while maintaining workability.