Carbonation Reaction of Calcium Silicate Hydrates by Hydrothermal Synthesis at 150°C in OPC-γ-Ca2SiO4-α-Quartz Systems
Source abstract
Abstract
In order to develop organic-fiber reinforced building materials with long-term stability and durability, the carbonation of autoclaved calcium silicate hydrate hardening bodies, prepared by low-temperature synthesis (150°C) in Ordinary Portland Cement (OPC)-γ-Ca2SiO4 (γ-C2S)-α-quartz systems, has been investigated. The CO2 absorption decreased remarkably as the water-to-powder ratio (w/p) of the samples decreased, and the carbonation of the samples was inhibited. In addition, this tendency became remarkable by the use of γ-C2S, and carbonation was fully inhibited in the case where the mass ratio of the starting materials OPC, γ-C2S and α-quartz was 1:4:5. It is estimated that only vaterite, which was based on residual γ-C2S after accelerated carbonation and had a lower density than calcite and aragonite, filled the pores and densified the sample.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production · Microbial Applications in Construction Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Tokyo Institute of Technology, Department of Metallurgy and Ceramic Science, Japan.
Inorganic Material Research Center, Omi Plant, Denki Kagaku Kogyo Co.ltd, Japan.
References (9)
Show source-provided references
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