Comparative studies of self-compacting concrete made with different generations of superplasticizers

• Main Authors: Raya Harkouss, Bilal Hamad
• Format: Article
• Language: English
• Published: National Council for Scientific Research-Lebanon 2016-12-01
• Series: Lebanese Science Journal
• Subjects: self-compacting concrete (SCC); high-strength concrete; concrete admixtures; second generation naphthalene-based superplasticizer; third generation polycarboxylate-based superplasticizer
• Online Access: http://lsj.cnrs.edu.lb/2016/12/30/r-harkouss-and-b-hamad/

Harkouss, R. and Hamad, B. 2016. Comparative studies of self-compacting concrete made with different generations of superplasticizers. Lebanese Science Journal, 17(2): 200-216. Self-compacting concrete was created as an effective solution to problems associated to low quality consolidation. Successful self-compacting concrete (SCC) mixes are designed to flow freely and cohesively without the intervention of mechanical compaction. The research presented in this paper has as objective to find the effect of different types of superplasticizers on the performance of concrete mixes. The understanding of this technology was acquired through a comparative study of mixes made with second generation sulphonated naphthalene formaldehyde based superplasticizer and third generation polycarboxylate-based superplasticizer. To meet the pre-defined objectives, the research program was subdivided into two interdependent phases. Phase I studies the effect of second and third generation superplasticizer on the fresh and hardened properties of mortar mixes. Phase II studies the effect of second and third generation superplasticizer on the fresh and hardened properties of concrete mixes. The experimental outcomes revealed that third generation superplasticizers induce more efficient dispersion defined by superior consistency levels and increased hardened strengths.