Creep hydroxycarboxylic acids

Fig. 1.49 The creep and creep recovery of concrete containing a hydroxycarboxylic acid water-reducing agent under saturated conditions (Neville).

Addition of admixture to obtain higher strengths In this situation the small amount of reported work indicates that where the water-cement ratio is reduced, the shrinkage and creep of the concrete is also reduced. Figure 1.50 shows the effect of a hydroxycarboxylic acid plasticizer on the creep of the concrete where the material has been used to effect a reduction in the water- cement ratio without any other changes in the mix design. Thus it seems that the reduction of the water-cement ratio will compensate for the increases in creep observed in the data above. 

Fig. 1.50 The effect of a hydroxycarboxylic acid water-reducing agent on the creep of when used to lower the water-cement ratio (Rodrigues).

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