Lignosulfonates compressive strength

Fig. 1.36 The relationship between water-cement ratio (water and air-cement ratio) and compressive strength of concrete containing lignosulfonate and hydroxycarboxylic-acid-based water-reducing agents.

It can be concluded that water-reducing admixtures of the lignosulfonate and hydroxycarboxylic acid types will not alter the relationship between the compressive strength and the tensile and flexural strengths. 

Table 7.30 A lignosulfonate-based water-reducing agent allows lower cement contents to be used in concrete blocks whilst maintaining the compressive strength...

At equal dosages, all water reducers are effective in producing concrete of equal or higher compressive strength than that of reference concrete. At equal cement content, air content, and slump, the water reducers increase the 28 day strength by about 10-20%. Table 9 shows the influence of lignosulfonate type admixture on the compressive strength of concrete.Water reduction varies between 5 and 8%. 

Table 9. Effect of Lignosulfonate on the Compressive Strength of Concrete...

Calcium lignosulfonate or calcium chloride can be used as alternatives to calcium sulfate hemihydrate in order to control the setting time of Reg Set cement. Calcium lignosulfonate (2.2 ml/kg) increases the compressive strength of Reg Set cement paste by approximately 70% at 14 days. Also,... 

Flexural and compressive strength of gypsum-free cement paste specimens. The setting was regulated by addition of calcium lignosulfonate and... 

Figure 9. Compressive and flexural strengths of portland cement mortars at a given w/c ratio with lignosulfonate.

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