i am preparing lightweight concrete(about 700kg/m3 concrete desnity) using expanded glass of bulk density 140kg/ m3. water cement ratio i used 0.5, 1.5% superplasticizer and got good slump value but i there are segregation how to eliminate the segregation? i used 25% of fly ash as replacement of cement in 2nd sample still there are some segregation. please refer some materials or some technique to reduce the segregation with good slump value.
Use viscosity modifying admixture at about 0.5% of the cementitious component.
However, not that incorporation of VMA always results in decrease in the slump. Therfore, you might need to increase the amount of your superlasticizer to about 2% to achieve similar slump you had
Use of cementitious materials such Ggbs,fly ash,rice husk or usage of natural polymer in the concrete will prevent segregation of light weight self compacting concrete.
https://www.sciencedirect.com/science/article/pii/S2214509515300115
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