Effects of magnesium content and carbonation on the multiscale pore structure of alkali-activated slags
Effects of magnesium content and carbonation on the multiscale pore structure of alkali-activated slags
复制标题
镁含量和碳化对碱激活渣多尺度孔隙结构的影响
DOI:
10.1016/j.cemconres.2020.105979
复制
发表时间:
2020
影响因子:
11.4
通讯作者:
White, Claire E.
中科院分区:
文献类型:
--
作者:
Wang, Sarah Y.;McCaslin, Eric;White, Claire E.
While CO2-resistant cement materials are crucial in oil and gas industries, the CO2emissions associated with manufacturing oil-well cements have necessitated the development of lower-CO2alternatives with enhanced carbonation resistance. A higher magnesium content blast furnace slag precursor for alkali-activated slag (AAS) has been shown to increase resistance to accelerated carbonation-induced degradation. This investigation assesses the effects of sample age, AAS magnesium content, and carbonation (exposure to 100% CO2) on the multiscale pore structure of AASs (nanometers to microns). The pore size distributions and diffusion tortuosities of ordinary Portland cement (OPC) and silicate-activated slag pastes are obtained through the techniques of nitrogen sorption, mercury intrusion porosimetry, and X-ray microtomography. These pore morphology properties show AAS to be more resistant to pore structural degradation following accelerated carbonation than OPC, and increased magnesium content in AAS is shown to improve its resistance to gel decalcification and capillary pore formation during carbonation.
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影响因子:
3.9
作者:
A. Blyth;C. Eiben;G. Scherer;C. White
通讯作者:
A. Blyth;C. Eiben;G. Scherer;C. White
影响因子:
11.4
作者:
G. Scherer;John J. Valenza;Gregory C. Simmons
通讯作者:
G. Scherer;John J. Valenza;Gregory C. Simmons
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Darshan Ballekere Kumarappa;S. Peethamparan
通讯作者:
S. Peethamparan
影响因子:
2.1
作者:
G. Kovalchuk;A. Fernández;Á. Palomo
通讯作者:
Á. Palomo