Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10275053 | Fuel Processing Technology | 2018 | 16 Pages |
Abstract
Coal gangue (CG) and coal fly ash (FA) are the main coal by-product wastes. This paper focuses on the pore structure evaluation of CG and FA blended cementing composites with various replacement levels from 3â¯days up to 180â¯days. Results indicate that negative effect of coal by-products on the compressive strength and average pore size can be reduced to a negligible level at late ages. Similar average pore size (~10â¯nm) and critical width (10-20â¯nm) are found for CG and FA composites after 90â¯days. Moreover, the blended composites have significantly higher gel pore fraction, and the higher the dosage the larger the gel pore fraction. Multi-fractal feature is observed with the fact that scale of micro-fractal region is found always broader than the macro-fractal region and the micro-Ds is found always larger than the macro-Ds. Both the micro- and macro-Ds of blended composites are systematically larger than the plain pastes.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Jin Yang, Ying Su, Xingyang He, Hongbo Tan, Youzhi Jiang, Linghao Zeng, BohumÃr Strnadel,