2023 PHD-6 ONGOING
Release time: 2024/07/18 Publisher： original Views：
CFRP Prestressed Concrete Assembled Raft-type Floating Structures
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Principal Investigator: Ling Tung Chai Ph.D Student: Luo Shuang |
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Project Background:
Injecting a precise dose of CO2 into cement-based materials during the process of mixing (named CO2-ready-mix cement-based materials) has been proven to be an effective way to rapidly sequester CO2. However, because of CO2 can only be injected within a few minutes of stirring, resulted in low carbon sequestration and mechanical performance. The preparation of ready-mix cement-based materials using desulfurized petroleum coke residue (DPCR) with high CaO content that can reactive with CO2, as an admixture is expected to solve this problem. While, the feasibility and underlying mechanisms of using DPCR for the production of CO2-ready-mix cement-based materials is still remains unclear and need to conduct research.
Aims & Goals:
1. To fully utilize the characteristics of desulfurized petroleum coke residue (DPCR) in enhancing the carbon sequestration capacity and mechanical properties of CO2-ready-mix cement-based materials (CBM);
2. To further increase the recycling rate of petroleum coke and lowering the related CO2 emissions from cement industry;
3. To clarify the early and progressive hydration and carbonation mechanisms of the CO2-ready-mix CBM.
Outcomes:
PAPER 1: 'Modification of early-age microstructure and enhanced mechanical properties of cement paste via injecting low-dose CO2 at fresh stage' Construction and Building Materials, 2024, 438:137284.
CONFERENCE ORAL REPORT 1: 'Enhancing Mechanical Properties of Portland Cement with Blending CO2-intermixed High Belite Calcium Sulfoaluminate Cement' in the 3rd International Conference on Sustainable Building Materials (ICSBM 2023)
CONFERENCE ORAL REPORT 2: 'First 60 min behavior of fresh properties and reaction mechanisms of cement pastes intermixed with CO2' in the Innovative Valorization of Alternative Materials and Waste towards Circular Constructionthe International Conference (WASCON-2023)
CONFERENCE ORAL REPORT 3: 'Beneficial use of DPCR to prepare CO2-ready-mix cement-based materials' in the 1st RILEM International Conference on Mineral Carbonation for Cement And Concrete (1st MC3 2024).