Course Description and Credit Information

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Course Description:

This course explores the innovative concept of self-healing concrete and its potential applications in sustainable landscape architecture. Participants will examine the use of recycled aggregates as carriers for microbial self-healing concrete (SHC) and its impact on repair performance over time. The course will delve into the bioremediation capacity of different aggregates and the mechanisms involved in the self-healing process. Additionally, the course will explore the use of biotechnology in the synthesis of calcium carbonate for cement production and the role of microencapsulation in controlling the crystallization process. Participants will also analyze the environmental and energetic benefits of self-healing concrete and its contribution to building a sustainable society.

Learning Objectives:

1. Attendees will understand the concept of self-healing concrete and its relevance to sustainable landscape architecture.

2. Attendees will understand  the bioremediation capacity of different aggregates as carriers for microbial self-healing concrete.

3. Attendees will learn about the implications of using recycled aggregates and low-carbon concrete in landscape architecture projects for retrofitting existing infrastructure.

General Course Information

Credits 2.75 CEU/CE/PH/CH
HSW Yes
Format PDF files that can be downloaded and audio files that read the pdf content if you prefer audio

 

Course Preview:

The contradiction between the scarcity of natural resources and the demand for construction materials has given rise to the application of recycled aggregates. Microbial self-healing concrete (SHC) is a clean and smart material, and its carrier has a great influence on repair performance. In this paper, recycled coarse aggregate (RCA) and recycled fine aggregate (RFA) were used as carriers, and their different repair effects over time were intensively investigated. The results showed that the RCA carrier had a better repair effect compared with that of RFA, and the maximum healing width could reach 0.27 mm by 28 day. The microbial repair efficiency was significantly influenced by the distribution of old mortar, with the RFA specimen having a small volume and wide distribution of repair products, while the RCA repair showed a centralized tendency. In addition, SEM, MIP and XRD characterization were used to analyze the repair mechanism. The time-dependent repair model was developed, and the applicability of the model for concrete enhancement under microbial repair was verified through experimental results. The research results could promote industrial applications by giving intelligent and green properties to recycled aggregates.