A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance evaluation of pervious concrete pavements with recycled concrete aggregate
Highlights RCA can be used in pervious concrete pavements. RCA substitution leads to the increase in porosity and hydraulic properties. Flexural tensile strength is not significantly affected by RCA replacement. Rheology-modifying admixture incorporation does not increase mechanical performance. Reducing water to cement ratio affects the pervious pavement mechanical properties.[
Abstract The construction and demolition waste (CDW) production and soil sealing are some of the main problems associated with urbanization. The use of pervious concrete pavements with recycled aggregates appears as an innovative and sustainable solution in both environmental and economic aspects. This work evaluates the behavior of pervious concrete produced with CDW aggregates. In order to better control the composition and to achieve better mechanical behavior, CDW composed only by recycled concrete was employed. The performance of the pervious concrete produced with different replacement levels of natural aggregates (NA) by recycled concrete aggregate (RCA), the influence of the rheology modifying admixture use, and the water-cement ratio reduction were investigated. Porosity, hardened density, hydraulic conductivity, infiltration, compressive and flexural tensile strengths, abrasion resistance, elasticity modulus, and Poisson's ratio were analyzed. The laboratory study results showed that the RCA replacement improves the hydraulic properties and decrease mechanical behavior. A test section composed of a pervious concrete surface layer with 100% RCA was built to verify the field performance. In situ infiltration tests were performed, and a Light Weight Deflectometer (LWD) was used to measure pavement deflections. Comparing the field results to those obtained in laboratory, it was found that only the compressive strength showed significant difference. The high standard deviation in test results strengthens the need for strict control of the material physical properties in the field. The global analysis of laboratory and field results showed that the sustainable concrete developed follows the Brazilian standard for pervious pavements and international recommendations.
Performance evaluation of pervious concrete pavements with recycled concrete aggregate
Highlights RCA can be used in pervious concrete pavements. RCA substitution leads to the increase in porosity and hydraulic properties. Flexural tensile strength is not significantly affected by RCA replacement. Rheology-modifying admixture incorporation does not increase mechanical performance. Reducing water to cement ratio affects the pervious pavement mechanical properties.[
Abstract The construction and demolition waste (CDW) production and soil sealing are some of the main problems associated with urbanization. The use of pervious concrete pavements with recycled aggregates appears as an innovative and sustainable solution in both environmental and economic aspects. This work evaluates the behavior of pervious concrete produced with CDW aggregates. In order to better control the composition and to achieve better mechanical behavior, CDW composed only by recycled concrete was employed. The performance of the pervious concrete produced with different replacement levels of natural aggregates (NA) by recycled concrete aggregate (RCA), the influence of the rheology modifying admixture use, and the water-cement ratio reduction were investigated. Porosity, hardened density, hydraulic conductivity, infiltration, compressive and flexural tensile strengths, abrasion resistance, elasticity modulus, and Poisson's ratio were analyzed. The laboratory study results showed that the RCA replacement improves the hydraulic properties and decrease mechanical behavior. A test section composed of a pervious concrete surface layer with 100% RCA was built to verify the field performance. In situ infiltration tests were performed, and a Light Weight Deflectometer (LWD) was used to measure pavement deflections. Comparing the field results to those obtained in laboratory, it was found that only the compressive strength showed significant difference. The high standard deviation in test results strengthens the need for strict control of the material physical properties in the field. The global analysis of laboratory and field results showed that the sustainable concrete developed follows the Brazilian standard for pervious pavements and international recommendations.
Performance evaluation of pervious concrete pavements with recycled concrete aggregate
Strieder, Helena Lunkes (author) / Dutra, Vanessa Fátima Pasa (author) / Graeff, Ângela Gaio (author) / Núñez, Washington Peres (author) / Merten, Felipe Raul Meert (author)
2021-10-22
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016