干旱区生态环境知识资源中心(Arid): Enzyme-Induced Carbonate Precipitation Combined with Polyvinyl Alcohol to Solidify Aeolian Sand

Arid

DOI	10.1061/(ASCE)MT.1943-5533.0004009
	Enzyme-Induced Carbonate Precipitation Combined with Polyvinyl Alcohol to Solidify Aeolian Sand
	Wu, Linyu; Miao, Linchang; Sun, Xiaohao; Wang, Hengxing
通讯作者	Miao, LC (corresponding author), Southeast Univ, Transportat Sch, Nanjing 211189, Jiangsu, Peoples R China.
来源期刊	JOURNAL OF MATERIALS IN CIVIL ENGINEERING
ISSN	0899-1561
EISSN	1943-5533
出版年	2021
卷号	33 期号:12
英文摘要	Enzyme-induced carbonate precipitation (EICP) has emerged as a soil reinforcement technique in recent decades. To enhance the durability of EICP-solidified soil, a method of EICP combined with polyvinyl alcohol (PVA) is proposed to improve aeolian sand. A cementation solution for EICP+PVA was prepared in the PVA solution. Unconfined compression strength, wind erosion, water erosion, and penetration resistance tests were performed to investigate the effect of EICP with different concentrations of PVA (1%, 2%, 3%, 4%, and 5%) on aeolian sand solidification. The durability of aeolian sand solidified by EICP and 3% PVA was examined through freeze-thaw and dry-wet cycle tests. The results demonstrated that the material precipitated from EICP solution is calcite; and that the presence of PVA can improve significantly the unconfined compressive strength, wind erosion resistance, water erosion resistance, and surface strength of EICP-solidified aeolian sand; and that 3% PVA is enough for sand treatment in practical applications. Additionally, EICP+PVA-solidified aeolian sand had high durability to the freeze-thaw and dry-wet cycles. Scanning electron microscopy (SEM) images revealed films with a network structure in the solidified aeolian sand after adding PVA. Combined with the mercury intrusion capillary pressure test, these tests indicated that the improvement of the performance of EICP+PVA-solidified sand mainly was due to the fact that the PVA films enhanced cementation between soil particles and between soil particles and calcium carbonate, and because PVA film-wrapped calcium carbonate filled the large-size pores in the soil. (C) 2021 American Society of Civil Engineers.
英文关键词	Enzyme-induced carbonate precipitation Polyvinyl alcohol Aeolian sand Water erosion resistance Durability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000708128500023
WOS关键词	SOIL PHYSICAL-PROPERTIES ; FREEZE-THAW ; CALCIUM-CARBONATE ; ENGINEERING PROPERTIES ; STRENGTH ; MICROSTRUCTURE ; ERODIBILITY ; SEEPAGE ; DESERT ; LAND
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363963
作者单位	[Wu, Linyu; Miao, Linchang; Sun, Xiaohao; Wang, Hengxing] Southeast Univ, Transportat Sch, Nanjing 211189, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wu, Linyu,Miao, Linchang,Sun, Xiaohao,et al. Enzyme-Induced Carbonate Precipitation Combined with Polyvinyl Alcohol to Solidify Aeolian Sand[J],2021,33(12).
APA	Wu, Linyu,Miao, Linchang,Sun, Xiaohao,&Wang, Hengxing.(2021).Enzyme-Induced Carbonate Precipitation Combined with Polyvinyl Alcohol to Solidify Aeolian Sand.JOURNAL OF MATERIALS IN CIVIL ENGINEERING,33(12).
MLA	Wu, Linyu,et al."Enzyme-Induced Carbonate Precipitation Combined with Polyvinyl Alcohol to Solidify Aeolian Sand".JOURNAL OF MATERIALS IN CIVIL ENGINEERING 33.12(2021).