Key points are not available for this paper at this time.
A research study was carried out to produce sustainable and durable high-strength self-compacting geopolymer concrete (HSSCGC) with ground granulated blast furnace slag (GGBFS)-based ternary blended precursors and ternary blended alkali-activated solution (AAS) under ambient curing. In the absence of regular standards, successful SCGC mix designs were formulated and produced to yield M25, M50, and M75 grade SCGC. To improve strength, AAS content and the AAS/Binder (A/B) ratio were gradually reduced from 220 to 190 kg/m3 and 0.47 to 0.34, respectively, realizing HSSCGC. GGBFS was the primary precursor, and its partial replacement was carried out with silica fume (SF) (30%) and rice husk ash (RHA) (5%). Additionally, the optimal composition of AAS consists of NaOH and blended silicate (Na2SiO3: 25% and K2SiO3: 75%). The freshly prepared SCGC was subjected to various workability tests through filling ability, passing ability, and segregation resistance attributes. The workable HSSCGC thus prepared was subjected to various hardened concrete characterization through mechanical characteristic study (both non-destructive along with destructive tests) and durability study (water absorption, chemical resistance, and corrosion resistance). The high-strength accomplishment was validated through microstructural tests. A reduced quantity of unreacted precursor presence and dense gel formation can be regarded as the causes of HSSCGC formation. The prevailing results illustrate that HSSCGC thus produced is both workable and durable, establishing a sustainable technology with optimal mix parametric values: 190 kg/m3; A/B ratio: 0.34; SP dosage: 7% and EW dosage: 24%. The long-term dominance, such as reduced maintenance, reduced embodied energy and global warming potential (GWP), as well as prolonged durability, justifies the use of HSSCGC.
Das et al. (Sun,) studied this question.