42602 2017 eng 202 208 83 article Elsevier Ltd. 1 -- -- -- Rice husk as (RHA) is an eco-friendly material, which can be used as a supplementary cementitious material (SCM) in cement and concrete. Due to the high water demand for the material, superplasticizers (SPs) are essential to improve the performance. However, the interaction between the SPs and RHA systems is limited. This paper investigates the interaction of the binders with three SPs, i.e. two polycarboxylate ethers (PCEs) and one lignosulphonate (LS). The investigations are performed on blended systems of mortar containing various percentages of RHA and limestone powder (LSP). LSP is used in this research to improve the workability of the mortar. The results from the zeta potential (ZP) shows that the SPs are extremely dependent on the pH of the suspension. At higher pH values such as in a cementitious system, the ZP becomes less negative indicating that the ions in the suspension interact with the carboxyl groups in the backbone of the polymers thus reducing the surface charges of the SP. The mini-slump flow shows that the workability of the blended mortar systems is significantly improved with the addition of SPs. LS systems with increasing RHA is observed to have similar workability as the control mix over time. The compressive strength test results show increased strength for all mortar specimens with added RHA and LSP at later ages. Cement and Concrete Composites Journal 10.1016/j.cemconcomp.2017.07.014 Geburtsname von Priebe, Nsesheye Susan: Msinjili, N. S. - Birth name of Priebe, Nsesheye Susan: Msinjili, N. S. 23.10.2017 Nsesheye Susan Priebe Wolfram Schmidt Andreas Rogge Hans-Carsten Kühne eng uncontrolled Compressive strength eng uncontrolled Rice husk ash eng uncontrolled Superplasticizers eng uncontrolled Zeta potential eng uncontrolled Workability Analytische Chemie Verlagsliteratur Datei im Netzwerk der BAM verfügbar ("Closed Access")