Utilization of high-range water reducing admixture having air-entraining agents in cementitious systems

Sahin H. G., Mardani A., Ozen S., Emin A.

JOURNAL OF BUILDING ENGINEERING, cilt.64, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 64
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.jobe.2022.105565
  • Dergi Adı: JOURNAL OF BUILDING ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Anahtar Kelimeler: HRWRA, AEA, Incompatibility between chemical admixtures, Water reducing admixture having air, entraining surfactants, Rheological properties, FREEZE-THAW RESISTANCE, SELF-COMPACTING CONCRETE, WET-MIX SHOTCRETE, TRANSPORT-PROPERTIES, POLYCARBOXYLATE SUPERPLASTICIZER, RHEOLOGICAL PROPERTIES, FLY-ASH, HIGH-VOLUME, LIGHTWEIGHT AGGREGATE, MONTMORILLONITE CLAY
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

Utilization of admixtures with different action mechanisms has increased by combining them both physically and chemically. The effect of the use of modified water reducing admixture hav-ing air-entraining agents on the some fresh and hardened state properties of concrete mixtures was investigated in this study. It was determined that the utilization of air-entraining admixtures (AEA) increases the workability of fresh concrete due to the fact that it creates spherical-shaped air bubbles in matrix. However, there are contradictions about the effect of cementitious systems on rheological properties in the literature. Also, compatibility problems may occur when high range water-reducing admixtures (HRWRA) and AEA are used together in mixtures. It was re-ported that the use of HRWRA causes an increase in the spacing factor and the action perfor-mance of the AEA is adversely affected. However, it was understood that limited studies were car-ried out on increasing the compatibility of these admixtures in the literature. The methods that can be applied to prevent these incompatibilities were evaluated. First, the incompatibility be-tween them can be reduced by optimizing the order of adding the admixtures (HRWRA and AEA) to the mixture. Secondly, it was understood that the use of water-reducing admixtures modified with air-entraining properties in concrete mixtures can eliminate the stated incompatibilities.