Investigating the durability of weak rocks to forecast their long-term behaviors

Torabi-Kaveh, Mehdi; Mehrnahad, Hamid; Morshedi, Saeed; Jamshidi, Amin

doi:10.1007/s10064-021-02504-y

Cited by 5 publications

(4 citation statements)

References 31 publications

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“…Clay minerals (i.e., chlorite, kaolinite, montmorillonite, and illite) are highly susceptible to water absorption [ 28 , 32 ]. Any changes in the water content of construction materials containing clay minerals play a critical role in these materials’ engineering behavior.…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in the strength of the samples (i.e., UCS and BTS) after saturation is due to the softening and lubricating effects of water. Previous studies revealed that due to the presence of clay minerals in some construction materials, such materials are highly susceptible to deterioration when exposed to water [ 32 , 58 , 59 ]. Since clay minerals are a significant part of the constituent components of the samples (CM 18.9–32.8%) ( Figure 6 ), they make the samples susceptible to the softening and lubricating effects of water, thereby decreasing the samples’ UCS and BTS.…”

Section: Resultsmentioning

confidence: 99%

“…These results indicate that the samples had different durabilities against the softening and lubricating effects of water after their saturation. It is well-known that n and CM are critical parameters controlling the durability behavior of construction materials against the softening and lubricating effects of water [ 28 , 32 , 65 ]. In order to assess the roles of n and CM on the samples’ durability, the relationships of these parameters with sat-dry (UCS) , sat-dry (BTS) , and sat-dry (Vp) were investigated.…”

Section: Resultsmentioning

confidence: 99%

“…As can be seen from Table 1, components existing in the samples had a wide range of various minerals including quartz, feldspar, mica, calcite, dolomite, gypsum, chlorite, kaolinite, montmorillonite, and illite. Clay minerals (i.e., chlorite, kaolinite, montmorillonite, and illite) are highly susceptible to water absorption [28,32]. Any changes in the water content of construction materials containing clay minerals play a critical role in these materials' engineering behavior.…”

Section: Mineralogical Composition and Porosity Of The Samplesmentioning

confidence: 99%

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Strength Characteristics, Ultrasonic Wave Velocity, and the Correlation between Them in Clay Bricks under Dry and Saturated Conditions

Jamshidi,

Sousa

2024

Materials

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One of the methods used to discover the development of deterioration in bricks used as a construction material in a building is the monitoring of the bricks’ strength characteristics over time. However, measuring the strength characteristics of bricks used in a building requires sampling for performing laboratory tests, which is not possible in some cases. As an alternative, ultrasonic wave velocity can be a useful, nondestructive tool for the indirect assessment of the strength characteristics of the bricks. In the present study, six different samples of clay bricks before utilization as construction materials in buildings located in Khorramabad City (Lorestan Province, western Iran) were collected. The mineralogical composition of the samples was studied using X-ray diffraction (XRD) analysis. As one common physical characteristic of the construction materials, the porosity (n) of the samples was measured. Next, the strength characteristics, including uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), and P-wave velocity (Vp), of the samples under dry and saturated conditions were determined. It was found that after the saturation of the samples, considerable decreases in the UCS and BTS and increases in the Vp occurred, respectively. By comparing the values of the UCS, BTS, and Vp of the samples under dry and saturated conditions, we found that the integrity loss for the UCS and BTS was higher than for the Vp. Results showed that the integrity loss of the UCS, BTS, and Vp was significantly affected by the n and clay mineral (CM) content of the samples. Considering the dry or saturated condition of the samples, there are good correlations with acceptable accuracy levels between the Vp and the UCS and BTS, with coefficients of determination (R2) varying from 0.95 to 0.98. Consequently, our findings showed that establishing UCS and BTS predictive equations for bricks before their use as a construction material can be a worthy, practical tool for monitoring the deterioration of bricks over time after their utilization in a building.

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Section: Resultsmentioning

confidence: 99%