Methods for characterization of aggregate pore structure for concrete durability
By: Shankaramurthy, Bharath Melugiri
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Contributor(s): Wang, Kejin.
Publisher: Mumbai ACC LTD 2023Edition: Vol.97(11), Nov.Description: 50-58p.Subject(s): Construction Engineering and Management (CEM)Online resources: Click here
In:
Indian Concrete Journal - ICJSummary: Pore structure of concrete aggregate has always been overlooked in the context of concrete durability, especially for concrete transport properties. Aggregate pore structure is relevant in the modern-day infrastructure as there is more demand for durable high-performance concretes (HPC). When the different phases of a HPC (specifically, the paste and interfacial transition zone) are being carefully engineered for their best performance, ignoring the aggregate phase could be riskier for the in-service performance of HPC. As detailed research related to aggregate pore structure characterization is extremely limited to date, the current study explores various simple techniques to bridge this identified gap and extract quantitative information from aggregate pores. Few selected methods are later used to evaluate key pore features (connected and disconnected pore volumes, tortuosity, resistivity) in aggregates. The results indicate a considerable impact of aggregate pores on concrete durability. A summary of potential techniques for aggregate pore structure characterization is also provided to serve as a quick reference guide for selecting a suitable technique to obtain valuable information from aggregate pore network.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
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Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2023-1778 |
Pore structure of concrete aggregate has always been overlooked in the context of concrete durability, especially for concrete transport properties. Aggregate pore structure is relevant in the modern-day infrastructure as there is more demand for durable high-performance concretes (HPC). When the different phases of a HPC (specifically, the paste and interfacial transition zone) are being carefully engineered for their best performance, ignoring the aggregate phase could be riskier for the in-service performance of HPC. As detailed research related to aggregate pore structure characterization is extremely limited to date, the current study explores various simple techniques to bridge this identified gap and extract quantitative information from aggregate pores. Few selected methods are later used to evaluate key pore features (connected and disconnected pore volumes, tortuosity, resistivity) in aggregates. The results indicate a considerable impact of aggregate pores on concrete durability. A summary of potential techniques for aggregate pore structure characterization is also provided to serve as a quick reference guide for selecting a suitable technique to obtain valuable information from aggregate pore network.
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