Effects of lightweight fly ash aggregate properties on the behavior of lightweight concretes

KOÇKAL N. U., Ozturan T.

JOURNAL OF HAZARDOUS MATERIALS, cilt.179, sa.1-3, ss.954-965, 2010 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 179 Sayı: 1-3
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.jhazmat.2010.03.098
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.954-965
  • Anahtar Kelimeler: Lightweight fly ash concrete, Mechanical behavior, Durability, Transition zone, HIGH-PERFORMANCE CONCRETE, CHLORIDE DIFFUSIVITY, STRENGTH, SIZE, MICROSTRUCTURE
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Influence of different lightweight fly ash aggregates on the behavior of concrete mixtures was discussed. The performance characteristics of lightweight concretes (LWCs) and normalweight concrete (NWC) were investigated through compressive strength, modulus of elasticity and splitting tensile strength representing the mechanical behavior; through rapid chloride permeability representing the transport properties and through rapid freezing and thawing cycling representing the durability of concrete. In order to investigate the aggregate-cement paste interfacial transition zone (ITZ). SEM observations were performed. Regression and graphical analysis of the experimental data obtained were also performed. An increase in compressive strength was observed with the increase in oven-dry density. The ratios of splitting tensile strength to compressive strength of lightweight aggregate concretes were found to be similar to that of normalweight concrete. All the 28- and 56-day concrete specimens had a durability factor greater than 85 and 90, respectively, which met the requirement for freezing and thawing durability. (C) 2010 Elsevier B.V. All rights reserved.