Study of rammed aggregate piers using construction and demolition wastes modified with cement and geosynthetics reinforcements

• Grant number: 17/06295-3
• Support Opportunities: Scholarships in Brazil - Master
• Start date: October 01, 2017
• End date: March 31, 2019
• Field of knowledge: Engineering - Civil Engineering - Geotechnical Engineering
• Principal Investigator: Fernando Henrique Martins Portelinha
• Grantee: Jordan Lopes Albino
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Currently, the greatest challenge in civil engineering remains in the real and substantial implementation of the sustainability concept, which can be reached by the use of shallow foundations instead of deep foundation solutions. However, the use of footings mostly depends on the bearing capacity of foundation soils. In this case, techniques of soil improvement can be used to increase the bearing capacity of soil foundation allowing the practice of shallow foundations. Geosynthetic inclusions has been used as reinforcement within the replaced zone of soil increasing the bearing capacity of shallow foundations. Rammed Aggregate pier (RAP) has also been extensively used for soil improvement to support shallow foundations. Studies has also shown that soil improvement can be reached with RAP constructed with siderurgy and mining waste materials, which results in an effective and sustainable practice. However, research has shown that RAPs can colapse due to lateral bugging or shearing when unconventional materials are used. The study consists on the development of a friendly environmental soil improvement technique which consist on the use of construction and demolition waste modified with cement as a fill material of RAP. Geosynthetic inclusions will be also used to reinforce the RAP in order to mitigate the bulging and shearing, resulting in an enhanced bearing capacity. The study will be conducted based in rapid load tests in small-scale 1-g models (5:1) constructed in laboratory. The reduction of bulging and increasing on bearing capacity is expected to be observed in this study with the use of geosynthetics. Additionally, construction and demolition waste is expected to work properly in order to replace natural materials in small and medium-size constructions using RAP technique. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ALBINO, J. L.; PIEROZAN, R. C.; PORTELINHA, F. H. M.. Lateritic Soil Improved with Partially Reinforced Granular Columns Using Recycled Sand and Geosynthetics. INTERNATIONAL JOURNAL OF GEOSYNTHETICS AND GROUND ENGINEERING, v. 8, n. 2, p. 17-pg., 2022-04-01. (17/06295-3)