Enlightenment of ancient Tabia for sustainable construction material manufacture by accelerated CO2 treatment
Year: 2024
Type: article
Abstract: Inspired by the wisdom of Tabia, an ancient building material with superior mechanical properties, this paper utilized accelerated CO 2 mineralization (CM) method to treat silty waste soil (SWS) with active lime after the pressing forming process for construction block manufacture. The influence of Ca(OH) 2 content and curing duration were explored. Results indicate that the generated CaCO 3 could fill pores and improve strength of the SWS blocks after CM treatment. At the optimal Ca(OH) 2 content of 15 % and curing duration of 24 h, the CM-SWS blocks possessed the compressive strength of 12.8 MPa, CO 2 emissions of 84.59 kgCO 2 /m 3 and cost of 196.26 CNY/m 3 , comparable with or superior than the commercial blocks. The findings would deepen the mechanistic understandings of CM treatment in material reinforcement, and pave a proof-of-concept path to sustainably upgrade the SWS of poor engineering performance for building material production. • Accelerated CO 2 mineralization (CM) upcycled silty waste soil (SWS) for value-added building materials. • SWS blocks possessed high-strength over 10 MPa. • Ca(OH) 2 content of 15 % and curing duration of 24 h are optimal. • CO 2 emissions of 84.59 kgCO 2 /m 3 and cost of 196.26 CNY/m 3 are significantly lower than those of commercial blocks.
Source: Journal of CO2 Utilization
Institutions: Zhejiang University, ETH Zurich, Institute for Building Materials
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,900
OpenAlex ID: W4402950573