Evolution Mechanism on Structural Characteristics of Lead-Contaminated Soil in the Solidification/Stabilization Process: Doctoral Thesis accepted by Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China

Jiang-shan Li

Informasi Umum

Kode

21.21.899

Klasifikasi

001.4 - Research; Statistical Methods

Jenis

Buku - Elektronik (E-Book)

Subjek

Research, Characterization And Evaluation Of Materials,

No. Rak

1

Informasi Lainnya

Abstraksi

In China, contamination of soils by heavy metals becomes a pressing problem. The urgency to remediate heavy metals contaminated soils creates an ever increasing demand for environmental protection and ecological civilization construction. Solidification/Stabilization (S/S) has been widely applied in the remediation of heavy metal-contaminated soil worldwide because of its effectiveness, low cost, and easy handling. Besides, the S/S products could also be utilized as subgrade or roadbed filling materials. The S/S treatment of heavy metal-contaminated soil involves interactions between soils, heavy metals, and binders. Soil properties and hydration reaction of binder are influenced by the presence of heavy metals. Meanwhile, heavy metal speciation and effectiveness of binder are, in turn, dependent on soil properties. Especially, the existing hydration products can improve the effectiveness of heavy metal precipitation and engineering properties of S/S products by changing the structure of heavy metal-contaminated soil. It is quite difficult to quantitatively predict the long-term structure variation of S/S products due to the lack of knowledge about the interaction mechanisms between soils, heavy metals, and binders. As a result, utilization of S/S-treated heavy contaminated soil is rather limited. Therefore, solving engineering problems and recycling of soil necessitate a systematic study on the structure evolution mechanisms of heavy metal-contaminated soils treated by S/S.

Various research methods, such as experimental study, theoretical analysis, and numerical simulation, were employed in this book to dissect the evolution mechanisms of structural characteristics of Pb-contaminated soils during the S/S process. A combination of laboratory and field tests, assisted by XRD, MIP, SEM, and many other technologies, was adopted in an attempt to establish the structural characteristics of Pb-contaminated soil on both the macroscopic and microscopic scales. Meanwhile, the influence of laws on the S/S process and their internal mechanisms were systematically analyzed. Models for the strength prediction and Pb leaching prediction of S/S monolith were established, which could provide key theoretical guidance and parameter support for the design of S/S remediation of Pb-contaminated soil and recycling.