Experimental Study on Evolution of Pore Structure of Cementitious Pastes Using Different Techniques

2015 ◽  
pp. 487-489
Author(s):  
D. Yuvaraj ◽  
Manu Santhanam
Keyword(s):  
Experimental Study ◽  
Pore Structure

Experiment Study on Mechanics and Pore Structure of Steel Fibre Reinforced Concrete

2010 ◽  
Vol 150-151 ◽  
pp. 825-828
Author(s):  
Yan Wang ◽  
Di Tao Niu ◽  
Yuan Yao Miao ◽  
Nai Qi Jiao
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Reinforced Concrete ◽  
Pore Structure ◽  
Steel Fibre ◽  
Fibre Reinforced Concrete ◽  
Experiment Study ◽  
Steel Fibre Reinforced Concrete ◽  
Mercury Intrusion ◽  
Strength And Durability

The concrete microstructure can affect its macroscopic properties, such as the strength and durability, etc. Based on the experimental study of cube compressive strength of steel fibre reinforced concrete, splitting tensile strength, flexural strength, and using by mercury intrusion method to test the pore structure of steel fibrous, this paper analyzes the influence of fibre on concrete pore structure. And then on mechanical properties of concrete from microcosmic perspective.

scholarly journals Experimental Study on the Fractal Features and Permeability Characteristics of Low Metamorphic Coal Pore Structure under Thermal Damage

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Zhen Liu ◽  
Mingrui Zhang ◽  
Shijian Yu ◽  
Lin Xin ◽  
Gang Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pore Structure ◽  
Coal Gasification ◽  
Thermal Damage ◽  
Fractal Model ◽  
Utilization Efficiency ◽  
Heating Process ◽  
Underground Coal Gasification ◽  
External Temperature ◽  
Permeability Characteristics

Underground coal gasification and exploitation of geothermal mine resources can effectively improve coal conversion and utilization efficiency, and the basic theory of the above technologies generally relies on the change law of the coal pore structure under thermal damage. Therefore, the influence mechanism of the development of the coal pore structure under thermal damage is analyzed by the nuclear magnetic resonance experiment, and the temperature-permeability fractal model is created. The results show that compared with microtransitional pores, the volume of meso-macropores in the coal body is more susceptible to an increase in temperature, which was most obvious at 200-300°C. During the heating process, the measured fractal dimension based on the T2 spectral distribution is between 2 and 3, indicating that the fractal characteristics did not disappear upon a change in external temperature. The temperature has a certain negative correlation with DmNMR, DMNMR, and DNMR, indicating that the complexity of the pore structure of the coal body decreased gradually with the increase of the temperature. Compared with the permeability calculated based on the theoretical permeability fractal model, the permeability obtained from the temperature-permeability fractal model has a similar increasing trend as the permeability measured by the NMR experiment when the temperature increases. The experimental study on pore structure and permeability characteristics of the low metamorphic coal under thermal damage provides a scientific theory for underground coal gasification and geothermal exploitation.

Experimental Study on Pore Structure and Mechanical Properties of Stratified Coal

2017 ◽  
Vol 17 (12) ◽  
pp. 04017116 ◽  
Author(s):  
Yuanfang Cheng ◽  
Long Jiang ◽  
Huaidong Wang ◽  
Ubedullah Ansari ◽  
Zhongying Han ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Pore Structure

Experimental study of the effect of liquid nitrogen cooling on rock pore structure

2014 ◽  
Vol 21 ◽  
pp. 507-517 ◽  
Author(s):  
Chengzheng Cai ◽  
Gensheng Li ◽  
Zhongwei Huang ◽  
Zhonghou Shen ◽  
Shouceng Tian ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pore Structure ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Cooling

Pore structure characterization based on joint numerical and experimental study: A case study of Nanpu sag

2019 ◽  
Author(s):  
Li Haitao ◽  
Deng Shaogui ◽  
Hu Xufei ◽  
Yuan Xiyong ◽  
Zhang Pan
Keyword(s):  
Experimental Study ◽  
Pore Structure ◽  
Structure Characterization ◽  
Nanpu Sag

Experimental study on pyrolysis tar removal over rice straw char and inner pore structure evolution of char

2015 ◽  
Vol 134 ◽  
pp. 333-344 ◽  
Author(s):  
Yun-liang Zhang ◽  
Wen-guang Wu ◽  
Shan-hui Zhao ◽  
Yu-feng Long ◽  
Yong-hao Luo
Keyword(s):  
Experimental Study ◽  
Pore Structure ◽  
Rice Straw ◽  
Structure Evolution ◽  
Tar Removal ◽  
Pyrolysis Tar ◽  
Inner Pore
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