External Sulfate Attack of Ambient-Cured One-Part Alkali-Activated Self-Consolidating Concrete
نویسندگان
چکیده
The mechanism of sulfate attack on alkali-activated materials, particularly the self-consolidating concrete (AASCC), is complex and contradictory. This could be due to wide range precursor activator materials used in production AASCC mixtures, which has called into question reliability validity existing evaluation procedures practices. paper presents a systematic research effort based granulated blast-furnace slag, prone various scenarios that are thought necessary establish proposed criterion. conducted experimental design demonstrated single-, binary-, ternary-precursor samples, activated with 1:1 Na2CO3 MetaNa2SiO3, partially submerged sodium, magnesium, mixed solutions experience dual scheme. Sulfate can occur immersed section solutions, while physical portion above solution level. influence concrete’s characteristics was not significant given damage confined outer surface. However, primarily monitored by different systems’ pore structure, resulted leaching ions from samples solutions. It found maintaining pH increased rate mixtures. Furthermore, binary, ternary blends replacing slag SF, or FA decreased porosity, surface scaling, deterioration caused an expansion volume very small diameter pores. Finally, all systems, gypsum ettringite were primary degradation products attack.
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ژورنال
عنوان ژورنال: Sustainability
سال: 2023
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su15054127