Bio-bricks: Biologically cemented sandstone bricks
| Autor: | Jason T. DeJong, Brina M. Montoya, Brian C. Martinez, D. Bernardi |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Calcite
Cement Brick Materials science Hydraulic lime Building material Building and Construction engineering.material Cementation (geology) chemistry.chemical_compound Compressive strength chemistry Cementation process engineering General Materials Science Geotechnical engineering Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 55:462-469 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2014.01.019 |
| Popis: | The cementation of sand into sandstone through microbial activity is a novel technology with a wide range of possible applications. The cementation process involves the introduction of bacteria and nutrients to sand, and through bacterial processes calcite precipitation binds particles together, ultimately creating a sandstone material. This technology could provide a new, more sustainable building material in the form of “bio-bricks”. This paper describes the treatment technique as well as results from testing after brick manufacturing. Bricks were tested to determine compression (p-wave) wave velocity, unconfined compression strength, and calcite concentration. P-wave velocity, stiffness, strength, and calcite content of bio-bricks all increase with further treatment of bacteria and cementation media. Results show that bio-bricks can have strengths ranging from 1 MPa to 2 MPa. Bio-bricks are comparable in terms of stress and stiffness to bricks prepared with the more conventional cement and hydraulic lime additives. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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