scholarly journals A Tensile Strength of Bermuda Grass and Vetiver Grass in Terms of Root Reinforcement Ability Toward Soil Slope Stabilization

2016 ◽  
Vol 136 ◽  
pp. 012029 ◽  
Author(s):  
M N Noorasyikin ◽  
M Zainab
Keyword(s):  
Tensile Strength ◽  
Bermuda Grass ◽  
Vetiver Grass ◽  
Soil Slope ◽  
Slope Stabilization ◽  
Root Reinforcement

scholarly journals Root reinforcement and slope bioengineering stabilization by Spanish Broom (<i>Spartium junceum</i> L.)

2009 ◽  
Vol 6 (3) ◽  
pp. 3993-4033 ◽  
Author(s):  
F. Preti ◽  
F. Giadrossich
Keyword(s):  
Tensile Strength ◽  
Root Diameter ◽  
Plant Succession ◽  
Stem Cuttings ◽  
Slope Stabilization ◽  
Root Reinforcement ◽  
Single Root ◽  
Root Area ◽  
Bio Engineering ◽  
Spartium Junceum

Abstract. The present paper deals with the characteristics of the root system of Spanish Broom (Spartium junceum L.), a species that is worth taking into consideration for its capacity for adaptation and resistance to drought. In particular, the aims of the study were 1) to investigate the plant's bio-mechanical aspects and 2) to verify whether root reinforcement and the field rooting ability of stem cuttings enhance its potential for use in slope stabilization and soil bio-engineering techniques, particularly in Mediterranean areas. Single root specimens were sampled and tested for tensile strength, obtaining classical tensile strength-diameter relationships. Analyses were performed on the root systems in order to assess root density distribution. The Root Area Ratio (RAR) was analyzed by taking both direct and indirect measurements, the latter relying on image processing. The data obtained were used to analyze the stability of an artificial slope (landfill) and root reinforcement. The measurement and calculation of mean root number, mean root diameter, RAR, root cohesion and Factor of safety are presented in order to distinguish the effect of plant origin and propagation. Furthermore, tests were performed to assess the possibility of agamic propagation (survival rate of root-ball endowed plants, rooting from stem cuttings). These tests confirmed that agamic propagation is difficult, even though roots were produced from some buried stems, and for practical purposes it has to be ruled out. Our results show that Spanish Broom has good bio-mechanical characteristics with regard to slope stabilization, even in critical pedoclimatic conditions and where inclinations are quite steep, and it is effective on soil depths of up to about 50 cm, in agreement with other studies on Mediterranean species. It is effective in slope stabilization, but less suitable for soil bio-engineering or for triggering natural plant succession.

scholarly journals Root reinforcement and slope bioengineering stabilization by Spanish Broom (<i>Spartium junceum</i> L.)

2009 ◽  
Vol 13 (9) ◽  
pp. 1713-1726 ◽  
Author(s):  
F. Preti ◽  
F. Giadrossich
Keyword(s):  
Tensile Strength ◽  
Root Diameter ◽  
Plant Succession ◽  
Stem Cuttings ◽  
Slope Stabilization ◽  
Root Reinforcement ◽  
Single Root ◽  
Root Area ◽  
Bio Engineering ◽  
Spartium Junceum

Abstract. The present paper deals with the root system's characteristics of Spanish Broom (Spartium junceum L.), a species whose capacity for adaptating and resisting to drought is worth investigating. In particular, the aims of the study were 1) to investigate the plant's bio-mechanical aspects and 2) to verify whether root reinforcement and the field rooting ability of stem cuttings enhance its potential for use in slope stabilization and soil bio-engineering techniques, particularly in the Mediterranean areas. Single root specimens were sampled and tested for tensile strength, obtaining classic tensile strength-diameter relationships. Analysis were performed on the root systems in order to assess root density distribution. The Root Area Ratio (RAR) was analyzed by taking both direct and indirect measurements, the latter relying on image processing. The data obtained were used to analyze the stability of an artificial slope (landfill) and the root reinforcement. The measurement and calculation of mean root number, mean root diameter, RAR, root cohesion and Factor of safety are presented in order to distinguish the effect of plant origin and propagation. Furthermore, tests were performed to assess the possibility of agamic propagation (survival rate of root-ball endowed plants, rooting from stem cuttings). These tests confirmed that agamic propagation is difficult, even though roots were produced from some buried stems, and for practical purposes it has been ruled out. Our results show that Spanish Broom has good bio-mechanical characteristics with regard to slope stabilization, even in critical pedoclimatic conditions and where inclinations are quite steep, and it is effective on soil depths up to about 50 cm, in agreement with other studies on Mediterranean species. It is effective in slope stabilization, but less suitable for soil bio-engineering or for triggering natural plant succession.

scholarly journals Contribution of the root system of vetiver grass towards slope stabilization of the São Francisco River

2015 ◽  
Vol 36 (4) ◽  
pp. 2453 ◽  
Author(s):  
Lorena Machado ◽  
Francisco Sandro Rodrigues Holanda ◽  
Vanessa Sousa da Silva ◽  
Antonio Iury Alves Maranduba ◽  
Janisson Bispo Lino
Keyword(s):  
Root System ◽  
Vetiver Grass ◽  
Slope Stabilization ◽  
Sao Francisco River ◽  
São Francisco River

scholarly journals FUNCTION OF INTERCEPTION, EVAPOTRANSPIRATION AND ROOT REINFORCEMENT OF PLANT ON SLOPE STABILIZATION

2020 ◽  
Vol 15 (1) ◽  
pp. 19-26
Author(s):  
Euthalia Hanggari Sittadewi
Keyword(s):  
Slope Stability ◽  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Tree Canopy ◽  
Shear Stresses ◽  
Slope Stabilization ◽  
Root Reinforcement ◽  
Soil Shear Strength ◽  
Positive Effect

The ability of plants to carry out the functions of interception, evapotranspiration and root reinforcement provides an effective and contributes to an increase in slope stability. Canopy has a role in the process of interception related to the reduction of amount the infiltrated water and the rapid fulfilment of soil moisture. Through the evapotranspiration mechanism, plants can reduce pore water pressure in the soil so that the trigger force for landslides can be reduced and the soil will be more stable. The roots mechanically strengthen the soil, through the transfer of shear stresses in the soil into tensile resistance in the roots. Roots also bind soil particles and increase surface roughness, thereby reducing the process of soil displacement or erosion. There is a positive relationship between the density of the tree canopy with the value of rainfall interception, evapotranspiration with a decrease in pore water pressure in the soil and the ability of root anchoring and binding with an increase in soil shear strength, indicating that the function of interception, evapotranspiration and strengthening of plant roots have a positive effect on increasing slope stability. Plants selection that considers the level of interception, the rate of evapotranspiration and root reinforcement by adjusting environmental and slopes conditions will determine the success of slope stabilization efforts by vegetative methods.Keywords : interception, evapotranspiration, root reinforcement, slope stabilization.

scholarly journals Effect of Oriental beech root reinforcement on slope stability (Hyrcanian Forest, Iran)

2014 ◽  
Vol 60 (No. 4) ◽  
pp. 166-173 ◽  
Author(s):  
E. Abdi
Keyword(s):  
Tensile Strength ◽  
Slope Stability ◽  
Root Distribution ◽  
Factor Of Safety ◽  
Power Relationship ◽  
Strength Increase ◽  
Hyrcanian Forest ◽  
Reinforcement Effect ◽  
Root Reinforcement ◽  
Oriental Beech

Vegetation significantly affects hillslope mechanical properties related to shallow landslides and slope stability. The objective of this study was to investigate and quantify the effect of Oriental beech root reinforcement on slope stability. A part of Hyrcanian forest in northern Iran was selected for the study area. To do the research, the Wu model (WM) was used and data related to the distribution and tensile strength of Oriental beech roots were collected. Root distribution was assessed using the concept of the root area ratio and trenching method. Laboratory tensile tests were conducted on fresh roots for strength characteristics. The factor of safety was calculated for two different soil thicknesses (1 and 2 m) and slope gradients between 10 and 45&deg;. The results showed that the root distribution generally decreased with increasing soil depth and the mean root strength value was 38.23 &plusmn; 1.19 MPa for 0.35&ndash;5.60 mm diameter range. The results verified a power relationship between tensile strength and root diameter. The reinforcement effect (C<sub>r</sub>) decreased with depth and the strongest reinforcement effect was in the second soil layer (10&ndash;20 cm) which showed a shear strength increase of 1.47 kPa. The increased factor of safety due to the presence of roots in one- and two-metre soil thicknesses was 27&ndash;44% and 15&ndash;26%, respectively. The improvement effect of roots was increased with increasing slope gradient and shallower soil thicknesses. &nbsp; &nbsp;

Natural Rubber and EPDM Rubber as an Impact Modifier in Vetiver Grass-Polypropylene Composites

2008 ◽  
Vol 47-50 ◽  
pp. 427-430
Author(s):  
Yupaporn Ruksakulpiwat ◽  
Jatuporn Sridee ◽  
Nitinat Suppakarn ◽  
Wimonlak Sutapun
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Fiber Surface ◽  
Vetiver Grass ◽  
Epdm Rubber ◽  
Polypropylene Composites ◽  
Impact Modifier ◽  
The Impact

In this research, vetiver grass was used as a filler in polypropylene (PP) composite. Chemical treatment was done to modify fiber surface. Natural rubber (NR) and EPDM rubber at various contents were used as an impact modifier of the composites. The composites were prepared by using an injection molding. By adding NR or EPDM to PP composites, a significant increase in the impact strength and elongation at break was observed in PP composite with rubber content more than 20% by weight. However, the tensile strength and Young’s modulus of the composites decrease with increasing rubber contents. Nevertheless, the tensile strength and Young’s modulus of the composites with NR or EPDM are still higher than those of PP up to 10% and 20% rubber contents, respectively. Comparisons between NR and EPDM rubber on the mechanical properties of the composites were elucidated.

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