Name: Elaine Cristina Furieri
Type: MSc dissertation
Publication date: 09/05/2019
Advisor:

Namesort descending Role
Patrício José Moreira Pires Advisor *

Examining board:

Namesort descending Role
Carla Therezinha Dalvi Borjaille Alledi External Examiner *
Jamilla Emi Sudo Lutif Teixeira Co advisor *
Patrício José Moreira Pires Advisor *
Romulo Castello Henriques Ribeiro Internal Examiner *

Summary: Pavements are multi-layer structures, responsible for absorbing and distributing the traffic load of vehicles that circulate through them. The tensions and deformations to which the structure is subjected depend mainly on the thickness of the layers and the rigidity of the materials used. The layers, which constitute a pavement, are often constructed with improved soils and / or soils with other materials, a procedure called soil stabilization. The local soil does not always have adequate characteristics for use in sub-base and base of pavements, and in order to make feasible the work, the stabilization of the local soil becomes necessary. There are consecrated and widely used ways to stabilize a soil for paving purposes, such as Portland cement, but it is necessary to search for new materials, given the high cost and scarcity of natural resources. Recent works show that the steel industries started to include in the process the disulfurization step of liquid pig iron in the Kambara reactor, producing a slag commonly called disulfurization slag from the Kambara reactor (KR co-product). Studies show that this type of slag can trigger pozzolanic reactions, conferring some binding quality, as well as other mechanical properties of resistance. This work studies the incorporation of the KR co-product in granulometry from 0 to 19 mm to the two studied soils, in proportions of 15%, 20% and 25% of KR co-product. The chemical stabilization of soils is also studied with an additive named commercially from Blindasolo®, with reagents and product concentrations indicated by the manufacturer. An experimental program was developed in the laboratory to determine the physical and mechanical characteristics of the soils and mixtures studied. Soon after this stage, four experimental tracks were built in the field with the mixes studied as sub-base and base of the tracks, and each of them, submitted to the HVS (Heavy Vehicle Simulator) mobile traffic simulator. for a number of cycles
corresponding to 10 years of project life. In each of the tracks a deflectometric survey was carried out along the simulation to analyze the structural quality of each track. It has been demonstrated through laboratory and field trials that the KR co-product is an option in soil stabilization, indicating this as a possible replacement for the traditional stabilization with Portland cement.
Keywords: Soil stabilization; KR co-product; Slag KR; Mobile traffic simulator type HVS; Blindasolo®.

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