کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4913808 | 1428774 | 2017 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of non-sintered lightweight aggregates from dredged sediments and modification of their properties
ترجمه فارسی عنوان
تهیه نماتدهای سبک وزن غیر متخلخل از رسوبات غرق شده و اصلاح خواص آنها
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
A novel preparation technique of non-sintered lightweight aggregates (LWAs) from dredged sediments was conducted in this study. In order to deal with the problem of hydration and low strength of the ceramsites without calcination, waterproofing lightweight aggregates (WLAs) and wrap-shell lightweight aggregates (WSLAs) are manufactured through the process of waterproofing and wrap-shell, respectively, and untreated lightweight aggregates (ULAs) were utilized as core layer. The performance characteristics, such as basic physical properties, mechanical strengths, water resistance, harsh environment resistance, and microstructure, of ULAs, WLAs and WSLAs were investigated. Results show that ULAs have a uniform particle size distribution, but their compressive strength is rather low (0.27Â MPa), and the value of water absorption was as high as 24.18%. WSLAs were equipped with a hard and stable concrete shell, which raised their compressive strength to 2.46Â MPa, and the salt, frost and shearing resistance were improved. These results reveal that, if dredged sediment would be used as raw material for producing non-sintered LWAs in concrete pouring, a stable shell layer was extremely essential to avoid their obtained specimen from crushing or being hydrated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 132, 1 February 2017, Pages 9-20
Journal: Construction and Building Materials - Volume 132, 1 February 2017, Pages 9-20
نویسندگان
Xiao Peng, Yan Zhou, Rui Jia, Wenjiang Wang, Yan Wu,