Self-cementing properties of crushed demolished concrete in unbound layers: results from triaxial tests and field tests

Estudio comparativo de los áridos reciclados de hormigón y mixtos como material para sub-bases de carreteras

“…resulting aggregates to be that they disintegrated completely during the soundness test, which they ascribed to the large amounts of mortar attached. Arm (14) found the stiffness of a sub-base layer consisting of recycled concrete aggregate to increase with time due to the material possessing self-cementing properties.…”

“…Poon and Chan (13) examined the use of mixed recycled aggregates containing variable proportions of recycled concrete and crushed clay brick as road sub-base materials and obtained acceptable CBR values for soaked specimens; they found the only disadvantage of the desventaja de estos áridos es que se desintegran por completo durante el ensayo de estabilidad de volumen, lo que atribuyeron a la gran cantidad de mortero adherido. Arm (14) indica que la rigidez de una capa de subbase de árido reciclado de hormigón aumenta con el tiempo debido a las propiedades auto-cementantes que posee este material.…”

Overview of bituminous mixtures made with recycled concrete aggregates

“…The majority of research conducted on RCA pavement layers focuses on using RCA as a granular material [21][22][23][24][25] and as a cement-treated material in base and sub-base layers [26,27]. This is mainly because in the lower layers, the specifications for the aggregates are less stringent than in the upper layers.…”

C&D waste for road construction: long time performance of roads constructed using recycled aggregate for unbound pavement layers

“…If the peak values of stations 1 and 6 of Road 1 are ignored, it can be observed that the mean value of the "E" moduli of the subbase are 235 MPa for Road 1 and 304 MPa for Road 2 (Table 7), roughly 3 times higher than the values obtained with the 1998 static tests. The increase in the moduli found at the end of the first four years of traffic could be attributed to the residual self-cementing properties of the mortar and concrete, contained in percentages of over 17% in the 0/30 C&D materials utilized for the subbase of Road 1 (Arm [5], Benedetto et al [6] Table 7. (2) 297 170 (1) Moduli referring to the temperature of 27.8°C according to the relation proposed by AASHTO (2) Moduli referring to the temperature of 32.0°C according to the relation proposed by AASHTO It should be noted that although the materials utilized for the construction of the two roads were of the same type, they present different physical, mechanical and compositional characteristics.…”