Microstructural Features and Mechanical Properties of Autoclaved Saline Soil Brick: Part II: Mechanical Properties

Lie Qu; Jiu Jun Yang; Shou Xi Chai; Lei Guo; Su Li

doi:10.4028/www.scientific.net/AMR.510.655

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 510Microstructural Features and Mechanical Properties...

Microstructural Features and Mechanical Properties of Autoclaved Saline Soil Brick: Part II: Mechanical Properties

Abstract:

The effects of different components, autoclaving temperature and time on the mechanical properties of saline soil bricks were investigated. The autoclaved curing schedule is optimized at autoclaving time of 3h and autoclaving temperature of 175. The optimal material formula consists of water-binding ratio 0.2, CaO 15%, finely grinded quartz powder 20 % and sand 20%, under which the compressive and flexural strengths of saline soil bricks reaches 31.9 Mpa and 7.8Mpa, respectively. Reducing water-binding ratio will effectively promote density, while increasing the amount of CaO will enhance the hydrothermal reaction products, density and the mechanical strength. In addition, adding finely grinded quartz powder and sand will further increase the hydrothermal reaction products and restrict volume shrinkage. Furthermore, elevating autoclaving temperature and extending autoclaving time are favorable to increase density and to improve mechanical properties. But autoclaving time exceeds 3h, the compressive strength will be reduced.

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Periodical:

Advanced Materials Research (Volume 510)

Pages:

655-659

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.510.655

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Online since:

April 2012

Authors:

Lie Qu, Jiu Jun Yang, Shou Xi Chai, Lei Guo, Su Li

Keywords:

Autoclaved Saline Soil Brick, Finely Grinded Quartz Powder, Mechanical Strength, Saline Soil

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References

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DOI: 10.4028/www.scientific.net/amr.510.650

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