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Reducing agent | reductant | reducer. the element or compound in an oxidation-reduction reaction that donates an electron to another species. Because the reducing agent is losing electrons, we say it has been oxidized.
The effectiveness of water reducers on concrete is a. function of their chemical composition, concrete tempera-. ture, cement composition and fineness, cement content, and the presence of other admixtures. The classifications. and components of water reducers are listed in Table 6-1.