Synthesis of Alternative Binder and Aggregate/Filler/Fibre from Waste Materials
Development/synthesis of alternative binder and aggregate/filler/fibre for concrete
Materials -Alternate binder
- Fly ash (FA)
- Ground granulated blast furnace slag (GGBS)
- Silica fume (SF),
- Micronised biomass silica (MBS)
Materials -Alternate aggregate
- Copper slag
- Manufactured sand
- Recycled aggregate
Studies on Ultra High Performance Geopolymer Concrete
To develop an ultra high performance geopolymer concrete (UHPGPC) the following principles were adopted:
- Elimination of ordinary Portland cement by geopolymer binder (activation of GGBS and SF by hydroxides and silicates).
- Enhancing the homogeneity of the matrix by limiting the maximum size of the aggregates up to 2.36 mm.
- Improving the compacted density by optimising the granular mix (particle packing).
- Increase the mechanical property of the matrix by incorporating appropriate amount of steel fibres.
- Curing at ambient temperature conditions.
Materials Used
- Fly ash
- GGBS
- Silica fume
- Standard sand
- Grade I (G1)
- Grade III (G3)
- Quartz sand (Qs)
- Steel fibres (6 mm and 13 mm)
Alkaline activator solution: Commercial grade sodium hydroxide/potassium hydroxide flakes and sodium silicate/potassium silicate solution was used as activators.
UHPGPC mix with flowable consistency Failure of Cube Specimen with and without fibre
Test set up for determination of flexural strength