Weakening Laws of Mechanical Properties of Sandstone Under the Effect of Chemical Corrosion

  • Yun Lin
  • Keping Zhou
  • Jielin LiEmail author
  • Bo Ke
  • Rugao GaoEmail author
Original Paper


The mechanical properties of rocks are significantly affected by chemical corrosion. To explore the influence of chemical corrosion on the weakening laws of sandstone mechanical properties, the porosity and pore size distribution (PSD) of sandstone samples immersed in different chemical solutions was measured by the nuclear magnetic resonance (NMR) technique. The damage variable based on the change of porosity was proposed to analyse the chemical damage to the sandstone samples. Moreover, both compressive and Brazilian tensile tests under static and dynamic conditions were carried out using a conventional servo-controlled testing machine and a split Hopkinson pressure bar (SHPB) system. The results showed that the porosity and proportion of macropores of the sandstone increase after chemical corrosion. The weakening laws of compressive and tensile strength of the sandstone under static and dynamic states are similar, and the relations among them and the damage variable are exponential. The dynamic tensile strength is most sensitive to the effects of chemical corrosion. The order of the degree of damage of chemical solutions on mechanical properties of sandstone is: DH2SO4 > DNaOH > DDistilledwater. Based on the experimental data, the relationships between the mechanical properties and chemical damage variable can be described as exponential equations. Additionally, the variations of dynamic increase factors versus chemical damage variable, the relationship between PSD and the strength of the chemically corroded sandstone, and the corrosion mechanism are also investigated.


Chemical corrosion Nuclear magnetic resonance (NMR) Split Hopkinson pressure bar (SHPB) Pore size distribution (PSD) Chemical damage variable Weakening law Corrosion mechanism 



Nuclear magnetic resonance


Pore size distribution


Split Hopkinson pressure bar


X-ray diffraction


International Society for Rock Mechanics


Longitudinal wave velocity (m/s)


Linear variable differential transducer


Dynamic increase factor

List of Symbols


Tensile strength of rock sample (MPa)


Loading force at failure (KN)


Diameter of rock sample (mm)


Thickness of rock sample (mm)

εi, εr, εt

Incident, reflected and transmitted strain measured by strain gauges on the bars

P1, P2

Force between the specimen and incident bar, force between the specimen and transmission bar (kN)


Porosity of the rock (%)

ms, md

Saturated mass of the sample (g), dry mass of the sample (g)


Density of water (g/cm3)


Bulk volume of sample (cm3)


Chemical damage variable


Initial mechanical property of rock sample


Mechanical property of rock sample treated with chemical corrosion

\(\emptyset_{0} ,\;\emptyset_{t}\)

Initial porosity of specimen, porosity of specimen after t days immersion in chemical solutions (%)


Uniaxial compressive strength (MPa)


Elastic modulus (GPa)


Axial failure strain (%)

σcd, σcs

Dynamic and static uniaxial compressive strength (MPa)

Ed, Es

Dynamic and static elastic modulus (GPa)

σtd, σts

Dynamic and static tensile strength (MPa)



The research presented in this paper was jointly supported by the National Natural Science Foundation of China (Grant No. 51474252, No. 51774323 and No. 41502327) and the Fundamental Research Funds Project for the Central South University (Grant No. 2016zzts095). The first author would like to thank Dr. Hongquan Guo for his important help in revising the paper, and the Chinese Scholarship Council for financial support to the joint Ph.D. studies at the University of Adelaide.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Resource and Safety EngineeringCentral South UniversityChangshaChina
  2. 2.School of Civil, Environmental and Mining EngineeringUniversity of AdelaideAdelaideAustralia
  3. 3.School of Resources and Environmental EngineeringWuhan University of TechnologyWuhanChina

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