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Advances in Concrete Construction
  Volume 4, Number 3, September 2016 , pages 221-230

Partial replacement of fine aggregates with laterite in GGBS-blended-concrete
Ram Chandar Karra, Mavinakere Eshwaraiah Raghunandan and B. Manjunath

    This paper presents a preliminary study on the influence of laterite soil replacing conventional fine aggregates on the strength properties of GGBS-blended-concrete. For this purpose, GGBS-blended-concrete samples with 40% GGBS, 60% Portland cement (PC), and locally available laterite soil was used. Laterite soils at 0, 25, 50 and 75% by weight were used in trails to replace the conventional fine aggregates. A control mix using only PC, river sand, course aggregates and water served as bench mark in comparing the performance of the composite concrete mix. Test blocks including 60 cubes for compression test; 20 cylinders for split tensile test; and 20 beams for flexural strength test were prepared in the laboratory. Results showed decreasing trends in strength parameters with increasing laterite content in GGBS-blended-concrete. 25% and 50% laterite replacement showed convincing strength (with small decrease) after 28 day curing, which is about 87-90% and 72-85% respectively in comparison to that achieved by the control mix.
Key Words
    admixtures; concrete; construction materials; environmental effect; fly ash/slags; strengthening
Ram Chandar Karra: Department of Mining Engineering, National Institute of Technology Karnataka, Surathkal, India
Mavinakere Eshwaraiah Raghunandan: Civil Engineering Discipline, School of Engineering, Monash University Malaysia, Bandar Sunway, Malaysia
B. Manjunath: Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, India

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