The present paper investigates the valorisation of three local Algerian waste
materials, namely Marble Powder (MP), Ground Granulated Blast Furnace Slag
(GGBS), and Glass Fibre-Reinforced Plastic Waste (GFRPW), as mineral additions
in Self-Compacting Concrete (SCC). A mixture design modeling approach was
used to evaluate the impact of these waste materials and their interactions on
the fresh and hardened properties of SCC. Experimental tests were performed,
including slump flow, V-funnel, L-box, air content, and compressive strength
tests. Regression models were developed to understand the behaviour of SCC
based on the proportions of MP, GGBS, and GFRPW in both binary and ternary
systems. The statistical analysis software Minitab was employed for the
modeling. The results revealed that the combination of MP, GGBS and GFRPW in
ternary systems has a synergistic effect on slump flow and L-box ratio. The
highest slump flow value and L-box ratio were achieved at proportions of
approximately 38% MP, 37% GGBS, and 25% GFRPW. The V-funnel time was
affected by the proportions of the waste materials, decreasing with higher MP
and GFRPW proportions and increasing with a higher GGBS proportion. In
GFRPW-based systems, a higher GFRPW proportion increased the air content,
but combining GFRPW with GGBS significantly reduced it. Furthermore, the
interaction between GGBS and GFRPW enhanced the development of the 28-day
compressive strength, where the highest value of 54 MPa was reached at the
combination of 32% GFRPW and 68% GGBS. After 90 days of curing, the SCC
mixtures containing 100% GGBS exhibited the highest compressive strength
value of 66 MPa. This study provides valuable insights for optimising the use of
MP, GGBS, and GFRPW in SCC, potentially leading to more sustainable and costeffective concrete production.
