Lignosulfonates creep

Tabie 1.30 Effect of lignosulfonate-based admixtures on basic creep of concrete... 

When materials other than a lignosulfonate water-reducing agent are used, in conditions where significant drying of concrete can take place, caution must be exercised where straight additions are used and where differential creep rates could be obtained in comparison to adjacent concrete containing no admixtures. 

However, it is felt that the intrinsic property of most water-reducing admixtures is to increase the creep and shrinkage of the concretes into which they are incorporated. This is minimized by utilizing the effect of the admixture to reduce the cement and, therefore, the paste content of the mix. For corresponding mixes with lignosulfonate water-reducing agents, the FIP/CEB recommendation for creep computation can be used with confidence because of the incorporation of a cement content/water-cement ratio function in the calculation. 

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