Scholarlink

<p>With the increasing adoption of low-clinker blended binders to reduce the environmental footprint of cement production, understanding the effect of carbonation on transport properties becomes critical. This study seeks to advance knowledge on the performance of blended cements by evaluating their efficiency in enhancing durability prior to carbonation and by assessing the relative changes in transport properties after carbonation for different low-clinker binder compositions. Transport properties, including permeable pore volume, sorption, oxygen permeability, and water penetration, were investigated for low-clinker cement compositions with clinker factors of 0.65 and 0.5 at two water-to-binder ratios (w/b), incorporating fly ash, slag, limestone, and calcined clay as supplementary cementitious materials (SCMs). After 120 days of curing, the specimens were subjected to accelerated carbonation at 3% carbon dioxide concentration for another 120 days. Results show that low-clinker binders exhibit superior transport properties compared to ordinary Portland cement (OPC) before carbonation. However, post-carbonation, blended binders experienced deterioration in transport performance, while OPC showed improvement. Moreover, the influence of carbonation on transport properties became more pronounced at higher w/b ratios. Overall, the findings highlight how binder type and w/b ratio govern transport behavior in partially carbonated systems, with implications for carbonation progression, corrosion kinetics, and the durability design of low-clinker cements.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sensitivity of transport properties to low-clinker blend composition before and after carbonation

  • 期刊论文

  • 发表日期：

    2025年11月28日

查看全文
  • Lav Singh,
  • Lupesh Dudi,
  • Shashank Bishnoi

摘要

With the increasing adoption of low-clinker blended binders to reduce the environmental footprint of cement production, understanding the effect of carbonation on transport properties becomes critical. This study seeks to advance knowledge on the performance of blended cements by evaluating their efficiency in enhancing durability prior to carbonation and by assessing the relative changes in transport properties after carbonation for different low-clinker binder compositions. Transport properties, including permeable pore volume, sorption, oxygen permeability, and water penetration, were investigated for low-clinker cement compositions with clinker factors of 0.65 and 0.5 at two water-to-binder ratios (w/b), incorporating fly ash, slag, limestone, and calcined clay as supplementary cementitious materials (SCMs). After 120 days of curing, the specimens were subjected to accelerated carbonation at 3% carbon dioxide concentration for another 120 days. Results show that low-clinker binders exhibit superior transport properties compared to ordinary Portland cement (OPC) before carbonation. However, post-carbonation, blended binders experienced deterioration in transport performance, while OPC showed improvement. Moreover, the influence of carbonation on transport properties became more pronounced at higher w/b ratios. Overall, the findings highlight how binder type and w/b ratio govern transport behavior in partially carbonated systems, with implications for carbonation progression, corrosion kinetics, and the durability design of low-clinker cements.