Experimental study of the effects of curing time on geotechnical properties of stabilized clay with lime and geogrid

Jahandari, Soheil; Saberian, Mohammad; Zivari, Farzad; Ghasemi, Maryam; Vali, Ramin

doi:10.1080/19386362.2017.1329259

Cited by 56 publications

(20 citation statements)

References 33 publications

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“…For further investigation, the present study is an effort to assess the effect of SF and PF at various volume contents on the mechanical properties of concrete incorporating LECA with W/B ratios of 0.37 and 0.42 at 3, 7, 28 and 60 days. Since the curing regime and age can affect the mechanical properties of concrete materials [50][51][52][53][54][55] and wet curing condition appear to be highly effective in improving the compressive strength of fibre reinforced concrete (FRC) and LC [56,57], cubic and cylindrical specimens were cured under six curing conditions: wet, 3-day wet, 14-day wet, air-dry controlled, air-dry uncontrolled, and 90 °C vapour. Therefore, the concrete specimens were cured by immersion in a water tank and taken out after different ages; then, the results of these specimens were compared with those cured under 90 °C vapour curing condition.…”

Section: Concrete Is One Of Most Popular Construction Materials and Imentioning

confidence: 99%

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Madandoust

Kazemi

Talebi

et al. 2019

Construction and Building Materials

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This study assessed the effect of steel and polypropylene fibres at various volume contents on concrete incorporating lightweight expanded clay aggregate (LECA) and water/binder (W/B) ratios of 0.37 and 0.42. The concrete specimens were cured under six curing conditions: wet, 3-day wet, 14-day wet, air-dry controlled, air-dry uncontrolled, and 90 °C vapour. The use of lightweight aggregates in the construction industry has drawn the attention of researchers and, on the other hand, fibres with a high strain-hardening response can be used as an appropriate addition in concrete materials. In this study, the mechanical properties of lightweight concrete containing steel or polypropylene fibres were evaluated by means of compressive strength, splitting tensile strength and modulus of elasticity tests at 3, 7, 28 and 60 days. According to the results, fibre reinforced concrete mixes containing LECA, cured under 90 °C vapour curing, achieved the highest mechanical strength. In addition, the optimum contents of steel fibres to obtain the highest compressive and splitting tensile strengths of lightweight concrete were 1% and 3%, respectively.

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Section: Concrete Is One Of Most Popular Construction Materials and Imentioning

confidence: 99%

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Madandoust

Kazemi

Talebi

et al. 2019

Construction and Building Materials

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“…In addition, cubic specimens were cast and prepared and tested with the Schmidt rebound hammer at 11, 28, 42 and 90 days. Since the curing regimes can affect the mechanical properties of concrete materials [34][35][36][37], plain concrete slabs and cubic specimens were cured under both wet and dry conditions. The results of Schmidt rebound hammer and core testing were compared with those of standard cube tests.…”

Section: Introductionmentioning

confidence: 99%

Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing

Kazemi

Madandoust

Brito

2019

Construction and Building Materials

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The main objective of this study was to estimate the compressive strength of recycled aggregate concrete (RAC) by means of Schmidt rebound hammer and core testing. The use of recycled aggregate in concrete has been shown to lead to a decrease in the construction cost and it can reduce the burden on the environment by saving natural aggregates. On the other hand, some nondestructive and semi-destructive techniques, such as Schmidt rebound hammer and core testing, are long-established methods for strength estimation of materials. Thus, the present study intended to obtain the compressive strength of RAC using these methods and then compare it with the results of 150 mm cube specimens. To achieve this goal, after producing concrete mixes with 70% replacement of recycled coarse aggregate, 96 cube specimens and 8 concrete slabs were cast to perform Schmidt rebound hammer, core and cube testing. In addition, the combination of the methods was used to obtain correlations between Schmidt rebound hammer and core testing. The results demonstrate that a multi-variable equation using these tests' results can efficiently predict the compressive strength of RAC and conventional concrete and is more promising than single-variable equations based on the Schmidt rebound hammer test results.

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“…Pancar and Akpınar [37] showed that the reduction of subgrade settlement achieved by the fused application of geosynthetics and lime stabilization was more than two times the settlement reduction achieved by sole application of lime stabilization. A study conducted by Jahandari et al [38] indicated that the combined application of lime stabilization and geogrid reinforcement increased the compressive strength of solely lime stabilized soil by a range of 31-78%. Jahandari et al [39] showed that upon 365 days curing, the increase in compressive strength achieved by the simultaneous use of lime stabilization and geogrid reinforcement was as high as two times the compressive strength of solely lime stabilized soil.…”

Section: Combined Effect Of Geopolymer Stabilization and Geotextile Rmentioning

confidence: 99%

Strength Enhancement of Geotextile-Reinforced Fly-Ash-Based Geopolymer Stabilized Residual Soil

Jayawardane

Anggraini

Li-Shen

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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Soils in their natural form are often deemed unsatisfactory to be directly used as a construction material for their respective applications. Under such circumtances, employment of ground improvement techniques to better suit the soil for its function is typically the most economical approach. Consequently, the present research investigated into the beneficial effect of modernized soil treatment techniques, i.e., geopolymer stabilization using fly ash as the precursor and geotextile reinforcement, on the strength enhancement of natural residual soil. A series of unconsolidated undrained (UU) triaxial compression tests were carried out to assess variation of geopolymer stabilized residual soil strength based on the varying number of geotextile layers, geotextile arrangement, and confining pressures. It was found that the increase in the number of geotextile layers resulted in a corresponding rise in soil strength and stiffness. It was also discovered that placement of geotextile layers at sample regions which suffered the maximum tensile stress-strain during loading was more effective compared to random placement. Soil strength was observed to reduce with increasing confining pressure which demonstrated the effectiveness of utilizing geotextile reinforcement at greater depths below the ground to be less. Failure patterns showed that while unreinforced soil resulted in failure along a shear plane at an approximate angle of 45 + φ/2 (φ: angle of internal friction), reinforced samples demonstrated a bulging failure where the soil between adjacent layers of geotextiles appeared to bulge. The findings deemed the employment of geopolymer stabilization and geotextile reinforcement on natural residual soil very effective with regards to the enhancement of soil strength and stiffness.

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Experimental study of the effects of curing time on geotechnical properties of stabilized clay with lime and geogrid

Cited by 56 publications

References 33 publications

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Effect of the curing type on the mechanical properties of lightweight concrete with polypropylene and steel fibres

Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing

Strength Enhancement of Geotextile-Reinforced Fly-Ash-Based Geopolymer Stabilized Residual Soil

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