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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Unveiling synergistic effects of Nano-modification and CO2 curing on the durability and carbon footprint of precast elements</title>
      <link>https://rip.trb.org/View/2250459</link>
      <description><![CDATA[Carbon dioxide (CO2) curing of concrete, a process well-suited for precast operations, increases the strength and reduces the porosity while lowering carbon footprint in two ways: (1) directly through carbonation and (2) by reducing the amount of cement required to achieve target performance. The addition of nano-TiO2 to cementitious composites was also shown to reduce porosity and increase the strength of cementitious composites. Furthermore,  previous studies showed that the combination of both nano-TiO2 addition and CO2 curing can increase the CO2 uptake and further reduce the porosity. However, the combined effect of both CO2 curing and nano-TiO2 addition on the transport properties was not studied, and nano-TiO2 is expensive; thus, this project aims to elucidate the combined effects of CO2 curing and nano-modification with respect to porosity, transport properties, and strength. This will enable the production of more durable, sustainable, and economical precast elements.]]></description>
      <pubDate>Mon, 18 Sep 2023 22:15:21 GMT</pubDate>
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