Banca de QUALIFICAÇÃO: VICTOR LINDEMBERG DE LIMA ALENCAR

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : VICTOR LINDEMBERG DE LIMA ALENCAR
DATE: 25/02/2022
TIME: 10:00
LOCAL: VIDEOCONFERENCIA meet.google.com/bxq-mvtv-siy
TITLE:

Soil-cement stabilization with the addition of hospital ash  waste 

KEY WORDS:

Soil-cement stabilization-addition- hospital ash waste 

PAGES: 18
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SUMMARY:

This work presents the analysis of the physicochemical, mineralogical and mechanical behavior of the chemical stabilization of soil with Portland cement and RSS ash as an additive. The technical feasibility of using this compound in layers of road pavements was investigated. A sandy soil, ordinary Portland cement with addition of pozzolan and RSS ash were used. The methodology involved the investigation of the samples from tests of geotechnical characterization of the soil and the mechanical behavior of soil-cement and soil-cement-ash mixtures. Compaction tests were carried out on specimens molded with pure soil and soil-cement in normal, intermediate and modified energies with cement contents added of 0%, 3%, 6% and 9%. The mix that presented the best result was with the addition of 9% of cement, in the modified energy, with an 8.95% increase in strength in relation to the initial one. The CBR test was carried out in pure soil, at a normal energy and humidity above 5.94%, the minimum values of CBR required for sub-base were reached, however, it did not reach the values required for use in pavement bases . Simple compression tests were carried out and, at normal energy and 9% cement content, the result of 25.31 kgf/cm² was found, which meets the minimum required for the use of soil-cement in pavements. This cement content was used for the compression tests with the soil-cement-gray, with the ash content of 5%, 10% and 20% in the normal energy, obtaining the values of 56.62 kgf/cm² , 38.43 kgf/cm² and 32.46 kgf/cm², respectively. In all traces with the addition of RSS ash, the values of the simple compressive strength obtained an increase. The incorporation of up to 20% of ash to the trace demonstrated that it is technically feasible to use RSS ash in the chemical stabilization of soil-cement in sub-bases and pavement bases.

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