Results 291 to 300 of about 15,177,396 (356)

Pore structure of affected zone around saturated and large superabsorbent polymers in cement paste

Cement & Concrete Composites, 2019
Superabsorbent polymer (SAP) has been widely used as internal curing agent for cement-based materials, duo to its high internal curing efficiency. Pore structure of affected zone around SAP is important for understanding the internal curing mechanism ...
Jin Yang, Fazhou Wang, Xingyang He, Ying Su   +3 more
semanticscholar   +1 more source

Evaluating Geotextile Pore Structure

1996
There are many test methods available to determine the pore sizes of geotextile filters. Often overlooked is the fact that each method provides a different interpretation of a geotextile's pore structure. A survey of the available test methods, indicates that four categories of pores can be measured.
GR Fischer, RD Holtz, BR Christopher
openaire   +1 more source

Pore Structure of Imogolite Computer Models

Langmuir, 1996
This study analyzes computer models of the microporous material imogolite. The purpose of this work is to validate computational methods developed for extracting pore size, pore volume, and surface area measurement of molecular level computer models. We accomplished this by comparing model properties with experimental data derived from N2 adsorption ...
Pohl, Phillip I, Faulon, Jean-Loup, Smith, Douglas M   +2 more
openaire   +2 more sources

Influence of surrounding rock temperature on mechanical property and pore structure of concrete for shotcrete use in a hot-dry environment of high-temperature geothermal tunnel

Construction and Building Materials, 2019
In view of the temperature distribution of the high-temperature geothermal tunnels, the surrounding rock temperature was divided into four grades (40 °C, 60 °C, 80 °C and 100 °C) to simulate the hot-dry environment.
Pin Liu, S. Cui, Zihao Li, Xuefeng Xu, Chen Guo   +4 more
semanticscholar   +1 more source

Hierarchical Pore Structures through Diatom Zeolitization

Angewandte Chemie International Edition, 2000
The controlled construction of a microporous/macroporous materials from diatomaceous earth and a high silica zeolite by a simple method is reported. The picture shows scanning electron microscopy images of the material at two scales (left and center) and the arrangement of the zeolite crystals precipitated onto it (right). These materials have numerous
Anderson, Michael W., Holmes, Stuart M., Hanif, Noreen, Cundy, Colin S.   +3 more
openaire   +3 more sources

Pore structure and multi-fractal analysis of tight sandstone using MIP, NMR and NMRC methods: A case study from the Kuqa depression, China

Journal of Petroleum Science and Engineering, 2019
The pore structure and fractal characteristic of tight gas sandstone from Cretaceous Bashijiqike Formation in Kuqa depression were investigated, using thin section, scanning electronic microscope (SEM), mercury intrusion porosimetry (MIP), nuclear ...
Xiaobo Guo, Zhilong Huang, Zhao Libin, Han Wei, Chao Ding, Xiongwei Sun, Ruitao Yan, Tonghui Zhang, Xuejun Yang, Ruomei Wang   +9 more
semanticscholar   +1 more source

Pore structure characterization of coal particles via MIP, N2 and CO2 adsorption: Effect of coalification on nanopores evolution

Powder Technology, 2019
To study the pore structure characteristics of middle-high rank coals (MHRC), five different kinds of coal samples from northern China were selected and pulverized, and the pore volume, pore size distribution, and fractal dimension were analyzed using N2/
Jingyu Jiang, Weihua Yang, Yuanping Cheng, Ke Zhao, Shaojie Zheng   +4 more
semanticscholar   +1 more source

Pore Network and Morphological Characterization of Pore-Level Structures

SPE Canada Heavy Oil Technical Conference, 2017
Abstract Due to the computational simplicity and time efficiency, pore network and morphological techniques are two practical approaches for characterization of pore-scale microstructures. The methods are quasi-static and exploit pore space spatial statistics to simulate pore invasions.
Peyman Mohammadmoradi, Farzad Bashtani, Banafsheh Goudarzi, Saeed Taheri, Apostolos Kantzas   +4 more
openaire   +1 more source

Tuning the Closed Pore Structure of Hard Carbons with the Highest Na Storage Capacity

ACS Energy Letters, 2019
High-capacity anode materials are one of the bottlenecks to further improve the energy density of Na-ion batteries (NIBs).
Qingshi Meng, Yaxiang Lu, Feixiang Ding, Qiangqiang Zhang, Liquan Chen, Yong‐Sheng Hu   +5 more
semanticscholar   +1 more source

Pore structure and transport processes

2023
Abstract This chapter describes how the characteristics of the pore structure of cement-based materials play a fundamental role in governing the transport processes in concrete, and hence, its durability. Variations in the size of the pores in concrete and their influence on both transport properties and durability are highlighted in ...
Basheer, Muhammed, Barbhuiya, Salim
openaire   +1 more source