Fiber reinforcement effects on sand considering a wide cementation range

Consoli, Nilo César; Vendruscolo, Márcio Antônio; Fonini, Anderson; Rosa, Francisco Dalla

doi:10.1016/j.geotexmem.2008.11.005

Cited by 273 publications

(96 citation statements)

References 28 publications

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“…The compressive strength of arti cially cemented soils has been studied by many researchers [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. On the other hand, using additive ber, glass, y ash, silica fume, and nano particle in ce-ment stabilization industry has several advantages [15][16][17][18][19][20]. Natural zeolite is one of these mineral materials.…”

Section: Introductionmentioning

confidence: 99%

Polynomial Models Controlling Strength of Zeolite-Cement-Sand Mixtures

MolaAbasi¹,

Shooshpasha²

2017

Scientia Iranica

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Abstract. The improvement of local soils with cement and zeolite can provide great bene ts, including strengthening slopes in slope stability problems and stabilizing problematic soils to prevent soil liquefaction. Recently, dosage methodologies have been developed for improved soils based on a rational criterion as it exists in concrete technology. The present study aims to quantify the in uence of the amount of cement, zeolite, porosity, and curing time in the evaluation of Uncon ned Compressive Strength (UCS) of zeolitecemented sand mixtures. A program of uncon ned compression tests considering di erent voids ratios, cement contents, zeolite contents, and curing times was performed in this paper. The results show that UCS values of samples substantially increase with increasing zeolite content to an optimum value of 30% after 28 days of curing time. The rate of improvement is approximately between 20 to 80% and 20% to 60% for 28 and 90 days curing times, respectively. Moreover, the polynomial models are shown to be the appropriate ones to estimate UCS values of zeolite-cemented mixtures. Additionally, the sensitivity analysis reveals the in uence of parameters and the contribution of each coe cient to the polynomial model. Cement and zeolite contents are related more strongly among relative density and curing time.

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Section: Introductionmentioning

confidence: 99%

Polynomial Models Controlling Strength of Zeolite-Cement-Sand Mixtures

MolaAbasi¹,

Shooshpasha²

2017

Scientia Iranica

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“…Thus, the improvement of permeability which is increased and it reduces the likelihood of explosive spalling [16]. Consoli et al [17] showed that the reinforcing effect of polypropylene fibres becomes less effective for high cement contents for a stabilized sandy soil, i.e., the peak strength only increases until 4% of cement content and after that the effect of the fibre reinforcement has the opposite effect. In fact, when the cement content is high, the stiffness of the stabilized soil is fundamentally governed by the high stiffness of the cement and the polypropylene fibres are, therefore, unable to mobilize the tensile strength before peak failure, since the deformations reached are very low.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, when the cement content is high, the stiffness of the stabilized soil is fundamentally governed by the high stiffness of the cement and the polypropylene fibres are, therefore, unable to mobilize the tensile strength before peak failure, since the deformations reached are very low. Thus, increasing the amount of fibres for high cement contents does not have repercussions on the increase of the strength [17]. Thus, polypropylene fiber, carbon fiber, plastic-glass based fiber and steel fibers had started to be used in concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the effect of water to cement ratio on mechanical and durability properties of Nano-silica concretes with Polypropylene fibers

2017

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In the present paper, the effect of Nano silica on mechanical properties and durability of concrete containing polypropylene fibers has been investigated. Here, the length and length to diameter ratio of used polypropylene fibers were considered to be fixed and equal to 18 mm and 600 respectively and the cement content was 479 kg/m 3 . The effect of fibers and Nano silica in four different percentages for each one at 0.1, 0.2, 0.3 and 0.4 percent by volume for fibers and 3 percent for Nano silica in concrete with water to cement ratio of 0.33, 0.36, 0.4, 0.44 and 0.5 have been compared and evaluated. In total, more than 425 cubic and cylindrical specimens were made according to ASTM standards. Finally, samples of polypropylene fiber containing Nano-silica were tested under compressive loads, flexural strength, indirect tensile strength (Brazilian test), abrasion resistance, permeability and porosity and their mechanical properties were evaluated. The test results showed a significant increase in mechanical properties improvement and durability of concrete. Compressive strength, tensile strength, flexural strength and abrasion resistance (of concrete) increased up to 55%, 25%, 49%, and 45% respectively. Also, considerable reduction of hydraulic conductivity coefficient to 50% indicates high durability of these types of concrete.

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“…Several studies have investigated geosynthetics reinforced soil using different types of laboratory tests and numerical simulations, the results have generally revealed that reinforcement enhances the shear strength of reinforced sand in comparison with unreinforced sand (Al Refeai [2]; Ranjan et al [33]; Yetimoglu and Salbas [36]; Consoli et al [13]; Liu et al [27]; Hamidi and Hooresfand [20]). …”

Section: Introductionmentioning

confidence: 99%

Effect of Geotextile Reinforcement on Shear Strength of Sandy Soil: Laboratory Study

Denine

Della

Dlawar

et al. 2016

Studia Geotechnica Et Mechanica

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This paper presents results of a series of undrained monotonic compression tests on loose sand reinforced with geotextile mainly to study the effect of confining stress on the mechanical behaviour of geotextile reinforced sand. The triaxial tests were performed on reconstituted specimens of dry natural sand prepared at loose relative density (Dr = 30%) with and without geotextile layers and consolidated to three levels of confining pressures 50, 100 and 200 kPa, where different numbers and different arrangements of reinforcement layers were placed at different heights of the specimens (0, 1 and 2 layers). The behaviour of test specimens was presented and discussed. Test results showed that geotextile inclusion improves the mechanical behaviour of sand, a significant increase in the shear strength and cohesion value is obtained by adding up layers of reinforcement. Also, the results indicate that the strength ratio is more pronounced for samples which were subjected to low value of confining pressure. The obtained results reveal that high value of confining pressure can restrict the sand shear dilatancy and the more effect of reinforcement efficiently.

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Fiber reinforcement effects on sand considering a wide cementation range

Cited by 273 publications

References 28 publications

Polynomial Models Controlling Strength of Zeolite-Cement-Sand Mixtures

Polynomial Models Controlling Strength of Zeolite-Cement-Sand Mixtures

Experimental study of the effect of water to cement ratio on mechanical and durability properties of Nano-silica concretes with Polypropylene fibers

Effect of Geotextile Reinforcement on Shear Strength of Sandy Soil: Laboratory Study

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