Accounting for dynamic alteration effect of SC-CO2 to assess role of pore structure on rock strength: A comparative study
7
Citation
55
Reference
10
Related Paper
Citation Trend
Keywords:
Exfoliation joint
From the view of energy state of material, this paper introduces a concept of weathering potential in carrying out quantitative calculation of the relevant products at different stages of rock-weathering and primary soil-forming processes, elaborates respectively on weathering degree in the bio-weathering layer of rocks and during the formation of soil material and clay, and evaluats the further tendency of weathering in the above-mentioned stages. The authors have discovered that the scales of weathering potential of the materials increase successively in the three stages, which indicates that the products in the above-mentioned three stages must have undergone stronger and stronger weathering in the primitive forming process of soil in Fildes Peninsula, Antarctic. But, because of relatively weak chemical weathering, it is reasonable that there are much more skeleton grains and little clay in primary soils in this region. Meanwhile, the authors have also verified that the weathering potential of crude rock determines to some extent decrease in the products' weathering potential in the different stages in primary soil-forming, thereby plays an important role in the genesis and development of the primary soil in the studied area.
Soil production function
Parent material
Cite
Citations (0)
Abstract In the preceeding paper (1), the general character of the weathering profile of granodiorite indicated that physical weathering was prevailing in the lower two zones and chemical weathering was dominant in the upper zone of the profile. It was also shown that the weathering profile has been developed in a severe chemical environment under oxidizing condition such as that encountered in the subtropical or warm temperate humid climate. The chemical weathering of the constituent minerals of the parent rock and the materials produced from them in such a weathering environment will now be examined. In this paper, the stability or duration of the primary minerals will bestudied.
Parent material
Oxidizing agent
Parent rock
Soil production function
Cite
Citations (8)
This paper analyzes the reason effecting the rock weathering,introduces the dividing and weathering effect of rock weathering belt and draws a dividing belt of quota target which is operated on rock weathering degree.
Soil production function
Parent material
Foundation (evidence)
Cite
Citations (0)
Soil production function
Weathering steel
Cite
Citations (16)
Many researchers have studied rates of weathering layer development. Weathering layers broadly include weathering rinds, hydration layers, rock varnish, and weathering crusts, each of which has been discussed within individual research fields. To understand the development of these weathering layers, previous research on the growth rates of weathering layer thickness and formation processes is reviewed. Then, terminology relating to weathering layers is elucidated. Weathering rind development is affected by the porosity and mobility of many elements. Conversely, the obsidian hydration layer is mainly controlled by moisture content and rock varnish is influenced by microbial activities. Environmental differences in the thickness of these thin weathered or alteration layers with weathering time are also examined. Although data are limited, the growth of weathering rind thickness varies by rock types and environmental conditions. The next stage of weathering rind studies will be supported by the progress of analytical methods including isotopic elements, interpretation of rock properties, biomineralization, and introduction of environmental parameters.
Parent material
Soil production function
Cite
Citations (5)
Soil production function
Weathering steel
Cite
Citations (1)
From the view of energy state of material,this paper introduces a concept a concept of weathering potential in carrying out quantitative calculation of the relevant products at different stages of rock-weathering and primary soil-forming processes,elaborates respectively on weathering degree in the bio-weathering layer of rocks and during the formation of soil material and clay,and evaluats the further tendency of weathering in the above-mentioned stages.The authors have discovered that the scales of weathering potential of the materials increase successively in the three stages,which indicates that the products in the above-mentioned three stages must have undergone stronger and stronger weathering in the primitive forming process of soil in Fildes Peninsula,Antarctic.But,Because of relatively weak chemical weathering,it is reasonable that there are much more skeleton grains and little clay in priamry soils in this region.Meanwhile the authors have also verified that the weathering potential of crde rock determines to some extent decrease in the products' weathering potential in the different stages in primary soil-forming,thereby plays an important role in the genesis and development of the primary soil in the studied area.
Soil production function
Parent material
Kola peninsula
Cite
Citations (0)
Based on the investigation research of weathering characteristics and affecting factors of weathering action on surrounding rock of the Longmen cavern, Luoyang, it is pointed that the main forms of weathering action are biological weathering and physical weathering. And the weathering meachanism is also studied. With the growing of plants on the top of the mountain, the primary effecting factor of weathering damage has beening changed into biological weathering from previous physical weathering. The biological weathering damage include mainly the mechanical damage of plant rootsystem and the biological-chemical damage of plant humic compounds. So the damage of biological weathering action should be paid more attention.
Soil production function
Parent material
Cite
Citations (1)
Soil production function
Cite
Citations (0)
Weathering is an important factor leading to the deterioration of mechanical properties of rocks,and the sensitive indices of weathering are the basis for quantificationally evaluating weathering degrees of rocks and determinging the depth of rock weathering.In this paper,based on a large number of chemical test data of rock samples under different weathering grades,time and different depths,the sensitive chemical weathering indices are studied.The study indicates that among the chemical weathering indices previously proposed,WI,WPI and LOI,show apparent monotonicity and sensitivity corresponding to the variations of weathering degree,time and depth.Therefore,the three indices can be used to evaluate the weathering degree of rock,and to determine the depth of weathering.Otherwise,ALK,a and b show no monotonicity corresponding to the variation of weathering degree,so they can not be used to evaluate the weathering degree of rock and determine the depth of weathering,either.
Soil production function
Parent material
Cite
Citations (3)