Laboratory study of the effect of temperature difference on the disintegration of redbed softrock
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To explore the impact of temperature difference (TD) on the disintegration of redbed softrock, three types of redbed rock, collected from Nanxiong Basin, were analyzed under three different treatments: TD, wetting and drying (WD), and TDWD-temperature difference and WD. To better understand the influence of different ranges of TD on disintegration during WD cycles, pH (hydrogen ion concentration) values, electrical conductivity (EC) values, and concentration of cations in leachate released during treatment were measured. The results show that no significant change can be observed under single TD treatment but that TD can increase the disintegration rate by accelerating the water–rock interaction. The effect of TD is more significant for rock with weak resistance to disintegration.
Keywords:
Rock disintegration / moisture–temperature interaction / redbed softrock / temperature difference (TD) / wetting and drying (WD)Source:
Physical Geography, 2019, 40, 2, 149-163Publisher:
- Taylor and Francis
Projects:
- Fundamental Research Funds for the Central Universities (SWU 118202)
- National Natural Science Foundation of China (41771088; 51779279)
- Special Program for Key Basic Research of the Chinese Ministry of Science and Technology (2013FY111900)
- Geochemical investigations of sedimentary rocks - fossil fuels and environmental pollutants (RS-176006)
DOI: 10.1080/02723646.2018.1559418
ISSN: 0272-3646