An investigation on fresh state properties of cement paste and concrete with GGBS and waste paper sludge ash

Abstract

The utilization of supplementary binding material is well accepted because of the many potential enhancements within the concrete composite and the overall construction economy. This paper mainly emphasizes on fresh state properties of cement concrete with grounds granulated blast furnace slag (GGBS) and waste paper sludge ash (WPSA), as concrete behavior is complex-heterogeneous with time-dependent properties. Again fresh state properties of concrete are very important as resulting hardening properties are based on fresh properties of concrete. The analysis aimed to develop an associate economic binder from waste products that might have applications within the production of concrete. As GGBS contains about 30% SiO2 and 58% CaO and, respectively 28% and 30% for WPSA, which is near to cement and can produce binder material. This paper investigates fresh state properties of concrete made with different proportions of waste paper sludge ash (WPSA) and grounds granulated blast-furnace slag (GGBS) as cement replacement, such as standard consistency, initial and final setting time, soundness test, and slump cone test has carried out. For that Cement is replaced with partial replacement of GGBS and waste paper sludge ash in the proportion of cement: WPSA:GGBS ratios 50:5:45, 50:10:40, 50:15:35, 50:20:30, 50:25:25 are made and their effect on properties have been checked. Also, the XRD and SEM analysis of materials has been administrated during this paper. From the test, it has been observed that for only GGBS as cement replacement, the water quantity require is less and there is segregation of water, while it is not happening in the case of combined WPSA and GGBS as cement replacement. Water quantity require for only WPSA as cement replacement is large as compared to GGBS used as cement replacement, as WPSA is porous, can overcome with the combined use of WPSA and GGBS along with one of the good superplasticizers like polyether-polycarboxylates (PCE).