Transport Properties of Internally Cured Self Compacting Concrete with Fly Ash
1
Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science & Technology, India
2
Anna University, India
Submission date: 2023-06-13
Final revision date: 2023-08-16
Acceptance date: 2024-06-05
Publication date: 2024-07-24
Corresponding author
SHANMUGAPRIYA J
Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science & Technology, Chennai, India
Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science & Technology, Chennai, India
Cement Wapno Beton 29(1) 2-15 (2024)
KEYWORDS
TOPICS
ABSTRACT
Proper curing of concrete has a major beneficial effect on the transport properties of concrete which in turn influences its durability. This paper attempts to study the effect of fly ash on the transport properties of internally cured Self-Compacting Concrete specimens under ambient conditions. Two internal curing materials, Lightweight Expanded Clay Aggregates [LECA] and Superabsorbent Polymer [SAP] were chosen for the study. Properties such as sorptivity, resistance to chloride ion penetration and chloride ion migration specimens with varying percentages of fly ash replacement from 30% to 50% are presented under different curing conditions namely conventional curing, sealed curing with internal curing materials and ambient curing with internal curing materials. The results showed that the impermeability of concrete improved
with an increasing percentage of fly ash replacements owing to the presence of internal curing water to improve hydration along with fly ash that moderates the heat of hydration and drying. The internal curing efficiency also improved with the increase in the percentage of fly ash replacement. Under ambient conditions, the mixes with fly ash above 45% replacement have shown very good mechanical and durability properties indicating a refined pore structure leading to enhanced transport properties.
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