Effect of high temperature, acid and sulfate on properties of alkali-activated lightweight aggregate concretes
Küçük Resim Yok
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The primary aim of the present study is to research the effect of binary blended on the mechanical, microstructural and durability properties of alkali activated lightweight aggregate concretes (AALWACs) used basaltic pumice (BP) as lightweight aggregate. Ground granulated blast furnace slag (GGBFS) and fly ash (FA) as precursors are activated with the mixtures of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) in diverse SiO2/Na2O ratios (Ms). The unit weight, compressive strength (f(c)), flexural strength (f(fs)) and splitting tensile strength (f(sts)) and water absorption of AALWACs are determined. Moreover, the f(c) and weight loss of AALWACs exposed to high temperature, acid and sulfate effects are determined separately. The results show that higher strength can be obtained from the AALWACs compared to the control concrete (C) produced with only Portland cement. The effects of high temperatures on the microstructures of AALWACs are examined by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and polarized light microscope (PLM) analyses. As the temperature exposed to the AALWACs increases, SEM and PLM analyses indicate that the deterioration, alteration, discoloration, pore and crack in their microstructures increase.
Açıklama
Anahtar Kelimeler
Basaltic pumice, Blast furnace slag, Fly ash, Alkali-activated lightweight aggregate concrete, Mechanical, microstructural and durability properties
Kaynak
Construction and Building Materials
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
317
