干旱区生态环境知识资源中心(Arid): Desert sand cemented by bio-magnesium ammonium phosphate cement and its microscopic properties

Arid

DOI	10.1016/j.conbuildmat.2018.12.046
	Desert sand cemented by bio-magnesium ammonium phosphate cement and its microscopic properties
	Yu, Xiaoniu 1,2,3; Qian, Chunxiang 4; Jiang, Jianguo 1,2
通讯作者	Jiang, Jianguo
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
EISSN	1879-0526
出版年	2019
卷号	200 页码:116-123
英文摘要	Loose desert sand grains can be cemented through the microbially-induced magnesium ammonium phosphate sediment into sandstone. Ammonia and ammonium were produced by Sporosarcina-Pasteurii hydrolyzing urea and effectively became environmentally friendly magnesium ammonium phosphate in the presence of HPO42- ions (hydrogen phosphate). This a new kind of the bio-cement based on Sporosarcina-Pasteurii, and the bio-phosphate mineral has cementation. The chemical components of the bio-sandstone were mainly MgNH4PO4(H2O)(6) (struvite) and quartz, as discovered through X-ray diffraction (XRD) analysis. The internal micro-structure of the desert sand was observed by scanning electron microscopy (SEM), and its morphology was of irregular spheres with a size in the range of 100-300 mu m. SEM images of the bio-sandstones showed the morphology of the cementation products as irregular flakes. The average hardness of two bio-sandstones cemented by spraying 1 and 3 times with cementation solution was 4.4 and 12.3, respectively. The evolution law of the micro-structure for the bio-sandstone cemented by spraying 3 times with cementation solution was revealed by the X-ray computed tomography (XRCT) technique. Maximum defect volume and average porosity of the bio-sandstone was 134 mm 3 and 18.39%, respectively. Interface binding forces between the bio-cement and smooth sheet glass (SiO2) were determined with WS-2005 coating adhesion scratch tester, which was 3.69 +/- 1.02 N. (C) 2018 Published by Elsevier Ltd.
英文关键词	Sporosarcina-Pasteurii Magnesium ammonium phosphate Desert sand Bio-sandstone X-ray computed tomography
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000458942400011
WOS关键词	INDUCED CARBONATE PRECIPITATION ; MECHANICAL-PROPERTIES ; STABILIZATION ; CONSOLIDATION ; OPTIMIZATION ; PARTICLES ; BEHAVIOR ; TIME ; SLAG
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
来源机构	清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214978
作者单位	1.Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China; 2.Minist Educ China, Key Lab Solid Waste Management & Environm Safety, Beijing 100084, Peoples R China; 3.Wenzhou Univ, Coll Architecture & Civil Engn, Wenzhou 325035, Peoples R China; 4.Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Yu, Xiaoniu,Qian, Chunxiang,Jiang, Jianguo. Desert sand cemented by bio-magnesium ammonium phosphate cement and its microscopic properties[J]. 清华大学,2019,200:116-123.
APA	Yu, Xiaoniu,Qian, Chunxiang,&Jiang, Jianguo.(2019).Desert sand cemented by bio-magnesium ammonium phosphate cement and its microscopic properties.CONSTRUCTION AND BUILDING MATERIALS,200,116-123.
MLA	Yu, Xiaoniu,et al."Desert sand cemented by bio-magnesium ammonium phosphate cement and its microscopic properties".CONSTRUCTION AND BUILDING MATERIALS 200(2019):116-123.