کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8947061 | 1645545 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of curing time on properties of the sand columns cemented by bio-barium phosphate
ترجمه فارسی عنوان
تأثیر زمان پخت بر خواص ستون های شن و ماسه که توسط فسفات زیست باریوم سمان شده است
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کلمات کلیدی
بارش ناشی از میکروبی از فسفات باریم، بیو باریم فسفات، متوسط قدرت فشاری، مرفولوژی، گردش خون مرطوب
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
Loose quartz sand grains can well be cemented by microbially-induced barium phosphate precipitation into a sand column. The bio-barium phosphate slurry was composed mainly of BaHPO4, and this was assessed through X-ray diffraction (XRD) analysis. The average compressive strength of sand columns increases with curing time, and increases when the content of bio-phosphate slurry is 20% and 30%wt. The results suggest the best curing time is 7â¯days, and the optimum content of bio-barium phosphate is 30%wt. Scanning electron microscopy (SEM) images of the sand columns showed the morphology of the cementation products is block, dumbbell-shaped, and spherical, and the products' particles can continue to grow in wet-dry circulation conditions. The sand columns (Ï5â¯cmâ¯Ãâ¯5â¯cm) could be cemented by bio-BaHPO4, and its average strength was 0.6â¯Mpa. The consolidation layer of dust grains was formed after spraying 1 time and 3 times of bio-BaHPO4 cement, and wind erosion rate of dust was 5â¯g/m2/h and 0â¯g/m2/h, respectively. The mixture of NaBaPO4 and Ba5(PO4)3OH under different time was selected and applied to bind loose sand particles, results indicating it could not glue loose sand grains.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 188, 10 November 2018, Pages 255-261
Journal: Construction and Building Materials - Volume 188, 10 November 2018, Pages 255-261
نویسندگان
Xiaoniu Yu, Chunxiang Qian, Jianguo Jiang,