Estabilización química de suelos expansivos de san josé de cúcuta (colombia) usando cenizas volantes
Carlos Humberto Florez-Gongora,Zuly Karina Caicedo-Osorio,Ricardo Zárate-Caballero,Betsy Amparo Contreras-Ortíz +3 more
TLDR
In this article, the authors present the result of the estabilizacion quimica de los suelos expansivos de una zona representativa de San Jose de Cucuta, donde se han observadodanos in construcciones livianas como consecuencia de the expansionretraccion of the suelo by the variacion constante de la humedad.Abstract:
Se presentan los resultados de la estabilizacion quimica de los suelos expansivos de una zona representativa de San Jose de Cucuta, donde se han observado danos en construcciones livianas como consecuencia de la expansionretraccion del suelo por la variacion constante de la humedad. Para lograr la estabilizacion del suelo arcilloso, se propone como aditivo quimico cenizas volantes, analizando sus posibles ventajas y desventajas. Las cenizas, fueron suministradas por la empresa Termotasajero S.A, de la ciudad. Los limites de consistencia se llevaron a cabo de acuerdo a la norma ASTM D 4318-95 [1], la humedad (ASTM D 2216), las relaciones de contraccion (ASTM D 427- 93/ 4943-95), granulometria (ASTM D 422-63), gravedad especifica ASTMD 854-92 y el ensayo estandar de Proctor (ASTM D-698). De los datos de humedad de los estratos, se puede observar su comportamiento descendente. Se muestran datos de area superficial especifica segun el procedimiento de azul de metileno descrito por Santamarina [2]. Se encontro que las arcillas de la zona estudiada estan clasificadas como de alta plasticidad (CH) con capacidad de intercambio cationico de hasta de 37 (meq/100 g) y en el que uno de los estratos posee alto contenido de magnesio (Mg). Segun la norma NSR 98 Titulo H [3], el potencial de expansion de las arcillas, es de alto a muy alto. El comportamiento del indice de plasticidad es decreciente en un valores que oscilan de treinta a cuarenta por ciento, para un porcentaje de mezcla de 30% en volumen de cenizas, lo anterior nos confirma la formacion de hidratos por medio de reacciones puzolanicas con el suelo arcilloso. Se concluye la necesidad de implementar analisis de difraccion de rayos X (DRX) y microscopia electronica para determinar composicion mineralogica exacta y estructura microscopica, lo cual ayudaria a confirmar o descartar la naturaleza de alta expansividad. Palabras Clave: arcillas expansivas;estabilizacion quimica; cenizas volantes.read more
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Best-fit models for predicting the geotechnical properties of FA–stabilised problematic soils used as materials for earth structures
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References
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Book
Foundation analysis and design
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Journal ArticleDOI
The colloidal and rheological properties of bentonite suspensions
Paul F. Luckham,Sylvia Rossi +1 more
TL;DR: A comprehensive review of the most relevant studies of the adsorption of non-ionic surfactants and polymers onto both silica and clay is presented in this article, along with the effect of electrolytes, polymers, high pressure and high temperature on the flow behaviour of Na+-montmorillonite suspensions.
Journal ArticleDOI
Specific surface: determination and relevance
TL;DR: Specific surface captures the combined effects of particle size and slenderness in a measurement that is independent and complementary to grain-size distribution as mentioned in this paper, which is independent of grain size distribution.
Journal ArticleDOI
Modelling the mechanical behaviour of expansive clays
TL;DR: In this article, a simple formalism is presented to model the behavior of expansive clays, where two levels of structure are considered, one for wetting and the other for drying, and a mathematical formulation of the model is described and its performance finally assessed by comparison with laboratory tests.
Journal ArticleDOI
Effect of lime, cement and Sarooj (artificial pozzolan) on the swelling potential of an expansive soil from Oman
TL;DR: In this article, Al-Khod (Town in northern Oman) expansive soil was stabilized using lime, cement, combinations of lime and cement, Sarooj (artificial pozzolan) and heat treatment.