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Effects of layer thickness and temperature on desiccation cracking characteristics of coral clay
Abstract Coral clay is one of the products of sorting sediments from the reclamation of coral islands. To reveal the crack characteristics of coral clay(C) with different layer thickness and temperature, a series of physiochemical and desiccation cracking tests are conducted, as well as the contrast tests of Chongqing silt (S), Kaolin (K) and Talcum (T). The results show that coral clay is a kind of low liquid limit clay (CL) composed of fine-grained coral debris and appears pale yellow and soft muddy with high water content. Its particle composition contents of silt, clay and sand are 56%, 42% and 2% respectively. The main mineral composition of coral clay is Aragonite, Calcite and Calcite magnesian, and the content is up to 39.5%, 35.5% and 25%, respectively. Coral clay, Chongqing silt and talcum under different layer thicknesses and temperatures all show a significant crack network. The area of soil clods separated by the cracks increases with the increment of layer thickness; accordingly, the number of the clod is decreased. Compared with coral clay, Chongqing silt and talcum, Kaolin has better cracked resistance. The fractal dimensions of coral clay, Chongqing silt and talcum all increase with the increment of layer thickness. Fractal dimensions of coral clay and Chongqing silt both increase slowly with the increase of temperature. Moreover, there is a good exponential relationship between the fractal dimension and average crack width. The frequency distributions of the crack length and width of coral clay under different layer thicknesses all conform to the form of LogNormal function curve. Besides, the crack morphology is multi-scale. The current work provides a reference for the possible future applications of this new material.
Effects of layer thickness and temperature on desiccation cracking characteristics of coral clay
Abstract Coral clay is one of the products of sorting sediments from the reclamation of coral islands. To reveal the crack characteristics of coral clay(C) with different layer thickness and temperature, a series of physiochemical and desiccation cracking tests are conducted, as well as the contrast tests of Chongqing silt (S), Kaolin (K) and Talcum (T). The results show that coral clay is a kind of low liquid limit clay (CL) composed of fine-grained coral debris and appears pale yellow and soft muddy with high water content. Its particle composition contents of silt, clay and sand are 56%, 42% and 2% respectively. The main mineral composition of coral clay is Aragonite, Calcite and Calcite magnesian, and the content is up to 39.5%, 35.5% and 25%, respectively. Coral clay, Chongqing silt and talcum under different layer thicknesses and temperatures all show a significant crack network. The area of soil clods separated by the cracks increases with the increment of layer thickness; accordingly, the number of the clod is decreased. Compared with coral clay, Chongqing silt and talcum, Kaolin has better cracked resistance. The fractal dimensions of coral clay, Chongqing silt and talcum all increase with the increment of layer thickness. Fractal dimensions of coral clay and Chongqing silt both increase slowly with the increase of temperature. Moreover, there is a good exponential relationship between the fractal dimension and average crack width. The frequency distributions of the crack length and width of coral clay under different layer thicknesses all conform to the form of LogNormal function curve. Besides, the crack morphology is multi-scale. The current work provides a reference for the possible future applications of this new material.
Effects of layer thickness and temperature on desiccation cracking characteristics of coral clay
Fang, Huaqiang (author) / Ding, Xuanming (author) / Jiang, Chunyong (author) / Peng, Yu (author) / Wang, Chunyan (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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