AGUIAR, P. A.; AGUIAR, Paula Almeida.
Resumo:
The following work addresses the soil stabilization method done with chemical
stabilizers. This technique is based on adding stabilizers to the soil that does not have the
characteristics and properties suitable for use in civil construction, in order to improve it.
Among the most used stabilizers is the cement that when incorporated in the soil results
in better values of strength and stiffness. However, there is a strong incentive in the
current environment for the use of industrial waste in construction. The ornamental rock
polishing residue is a potential stabilizer that falls within this category of materials.
Therefore, this work aims to study the behavior of an expansive soil when stabilized with
the marble polishing residue and the cement, as well as to promote a cost comparison
between this technique and the stabilization with only cement and with only lime. The
soil used was collected from the municipality of Paulista-PE and was stabilized with
additions of 30%, 40% and 50% of residue. The cement content and the specific dry
weight were set at 6% and 15 kN/m³, respectively. Simple compression strength tests
were performed after 7 days of cure. The results indicated that the marble residue is
capable of promoting greater resistance to the soil as its contest increases when compared
to a soil stabilized only with cement. Na increase of 30 kPa was observed by adding 30%
of residue to the soil-cement mixture. However, the soil stabilized with lime showed
better results, having a difference of 400 kPa when compared with the addition of 50%
of residue. The costs for stabilization with the three types of chemical stabilizers (cement,
cement and residue and lime) were also more favorable for lime.
