中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2017, Vol. 36 ›› Issue (5): 51-56.DOI: 10.3969/j.issn.1674-0696.2017.05.10

• 港口航道·水利水电·资源环境 • 上一篇    下一篇

瘠性磷矿渣生产气泡混合轻质土的试验研究

李明东1,2,范公俊3,姬凤玲4,田安国1   

  1. (1.淮海工学院 土木工程学院,江苏 连云港 222005;2.江苏省海洋资源开发研究院,江苏 连云港 222005; 3.中交广州航道局有限公司,广东 广州 510221;4.深圳大学 土木工程学院,广东 深圳 518000;)
  • 收稿日期:2015-10-19 修回日期:2015-11-25 出版日期:2017-05-18 发布日期:2017-05-18
  • 作者简介:李明东(1981—),男,山东平邑人,副教授,博士,主要从事岩土工程和固废资源化方面的研究。E-mail:ytlimd@163.com。
  • 基金资助:
    国家自然科学基金项目(51609093);江苏省博士后基金项目(1601007A)

Laboratory Study on Producing Foam Mixed Lightweight Soil from Barren Phosphorus Slag

LI Mingdong1, 2, FAN Gongjun3, JI Fengling4, TIAN Anguo1   

  1. (1. School of Civil Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu, P. R. China; 2. Institute of Jiangsu Marine Resources Development, Lianyungang 222005, Jiangsu, P. R. China; 3. CCCC Guangzhou Dredging Co., Ltd., Guangzhou 510221, Guangdong, P. R. China; 4. School of Civil Engineering, Shenzhen University, Shenzhen 518000, Guangdong, P. R. China;)
  • Received:2015-10-19 Revised:2015-11-25 Online:2017-05-18 Published:2017-05-18

摘要: 利用室内试验对磷矿渣生产气泡混合轻质土的生产技术和性能进行了研究,发现在采用发泡机生产气泡时,尼纳尔的稳定性优于十二烷基磺酸钠,AES的最佳浓度为3%。砂浆静置有利于减少消泡,最佳气泡掺入时间为砂浆静置60~90 min后。磷矿渣气泡混合轻质土的密度主要受气泡添加量的影响,实际工程中适宜气泡添加量为100%~200%;无侧限抗压强度随水泥含量的增加而增加,随气泡添加量的增加而减小,28 d强度可达1.5 MPa以上,可用于路基填筑、矿坑回填、建筑物回填土等,28 d后还会大幅增加。

关键词: 岩土工程, 矿渣, 轻质土, 发泡剂, 路基, 矿坑

Abstract: Laboratory study was used to study the technology and performance of producing foam mixed lightweight soil from phosphorus slag. The results show that: when the foam is produced by foaming machine, the stability of Coconut oil fatty acryl diethanolamine [C11H23CON(CH2CH2OH)2] is better than that of sodium dodecyl sulfate [CH3(CH2)10CH2-OSO3Na], and the optimal concentration of AES is 3%. Leaving mortar stationary is helpful to the reduction of de-foaming and the optimal time before being mixed with foam is 60~90 min after leaving mortar stationary. The density of phosphorus slag foam mixed lightweight soil is mainly influenced by foam content, and the appropriate foam content is 100%~200% in practical engineering. The unconfined compression strength is increased with the increase of cement content, and decreased with the increase of foam content. The 28d unconfined compression strength can reach 1.5 MPa and even above, which can be used for roadbed filling, mine pit backfilling, building backfilling and etc. The strength will be greatly increased after 28 days.

Key words: geotechnical engineering, slag, lightweight soil, foaming agent, subgrade, mine pit

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