ARTÍCULO
TITULO

Effect of lime on the mechanical response of a soil for use in unpaved forest roads

Gissele Souza Rocha    
Claudio Henrique de Carvalho Silva    
Heraldo Nunes Pitanga    
Ecidinéia Pinto Soares de Mendonça    
Dario Cardoso de Lima    
Gustavo Diniz da Côrte (Author)    

Resumen

The main objective of this study was to propose the application of soil-lime mixtures asa primary coating layerof unpavedforestroads based on the premise that this layer can be considered mechanically similar to a flexible pavementsub base layer, aiming to fill a gap in the current technical literature and engineering practice in this field of knowledge. In the study, a laboratory test program was carried out in a residual gneiss soil encompassing: (i) geotechnical characterization tests; (ii) compaction tests at the standard Proctor energy on soil specimens and on soil-lime mixturespecimens prepared with lime contents of 2, 4 and 6% related to the dry soil mass; (iii) unconfined compressive strength tests on soil specimens compacted at the standard Proctor optimum parameters; and (iv) unconfined compressive strength tests on specimens of soil-lime mixtures compacted at the standard Proctor optimum compaction parameters with lime contents of 2, 4 and 6%, and cured at 22.8°C in the curing periods of 3, 7, 28 and 90 days. The results showed that the addition of lime resulted in: (i) reduction in soil maximum dry unit weight (gdmax) and increase in soil optimum water content (wopt);and(ii) significant gains in soil unconfined compressive strength that evidenced the expressive occurrence of pozzolanic reactions in the mixtures.Based on the hypothesis of a similar requirement for soil-cement and soil-lime mixtures, the tested soil-lime mixtures met the minimum mechanical strength (1.2MPa) required for application as a primary coating layer of unpaved forest roads.

 Artículos similares

       
 
Fakhri Mansour, Vanaei Vahid     Pág. 506 - 512
It may be stated that the main reason for the failure of asphalt pavement, especially early damage, is due to destruction and loss of adhesion properties of bitumen in the asphalt mix. Stripping is the weakening or the loss of adhesion between the aggreg... ver más

 
Leema Peter, P.K. Jayasree, K. Balan, S. Alaka Raj     Pág. 558 - 566
Soft soils form problematic subgrade for pavements due to its low bearing capacity and strength. Pavement loads coming on the soft subgrade soil may cause detrimental pumping actions when they are located in areas with high water table which causes both ... ver más

 
Jherson Eveiro Díaz, Ruby Mejía de Gutierrez, Janneth Torres     Pág. Page 141 - 154
The effect of the incorporation of a petrochemical industry waste, named spent fluid catalytic cracking (FCC) in the hydration process and microstructure of cementpaste, was studied. Portland cement (OPC) pastes, with and without addition of meta-kaolin ... ver más

 
Muntohar A.S.     Pág. 82 - 89
Improvement of tensile strength in fiber reinforced soil is an important research topic. A study has been undertaken to investigate the strength of stabilized clay-soil reinforced with randomly distributed discrete plastic waste fibers by carrying out sp... ver más

 
Sung-Mo Jung and Dong-Joon Min     Pág. 1632 - 1636