- Title
- Strength and filtration stability of cement grouts in porous media
- Creator
- Zhou, Zilong; Cai, Xin; Du, Xueming; Wang, Shanyong; Ma, Dan; Zang, Haizhi
- Relation
- Tunnelling and Underground Space Technology Vol. 89, Issue July 2019, p. 1-9
- Publisher Link
- http://dx.doi.org/10.1016/j.tust.2019.03.015
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2019
- Description
- The diffusion of cement-based grouts in porous media is an important issue in soil sealing and grouting effects. To better understand the effects of grouting parameters, including grouting temperature, water-cement ratios and mass fractal dimensions, on the retention of slurry particles, the permeability of injected media, and the strength of cementation under a constant pressure condition, several types of tests, including filtration, permeability and uniaxial compressive strength tests, were performed. The experimental results indicate the following: (1) The retention rate of cement particles decreases sharply with an increase in the distance from the grouting source in the porous media with a higher mass fractal dimension, whereas the retention rate of cement particles decreases slowly with increasing diffusion distance in the porous media with a lower mass fractal dimension. (2) Within a certain distance, the retention of cement particles at a lower temperature is slightly higher than that at a higher temperature. Beyond this critical distance, the retention of cement particles at a lower temperature is generally lower than that at a higher temperature. (3) Regardless of the cement slurry, the damage is not uniform in the injected porous media. (4) The compressive strength of the porous media with a higher fractal dimension at the test point near the grouting source is higher than that of the media with a lower fractal dimension. However, at the test point far from the grouting source, the compressive strength of the porous media with a lower fractal dimension is greater than that of the media with a higher fractal dimension.
- Subject
- strength; filtration; cement grouts; porous media; permeability
- Identifier
- http://hdl.handle.net/1959.13/1474729
- Identifier
- uon:49350
- Identifier
- ISSN:0886-7798
- Language
- eng
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