Abstract

OSPINA-GARCIA, Miguel Ángel; CHAVES-PABON, Saieth Baudilio  and  JIMENEZ-SICACHA, Luis Miguel. Improvement of clayey subgrades through the addition of steel waste. Revista Investig. Desarro. Innov. [online]. 2020, vol.11, n.1, pp.185-196.  Epub Jan 21, 2021. ISSN 2027-8306.  https://doi.org/10.19053/20278306.v11.n1.2020.11692.

This work evaluates the behaviour of clay soil mixture by adding stell waste/slag, comparering with the quality criteria to be a subgrade road. The behavior of the mixture of steel waste with kaolinite clay was established with a dosage matrix of global increase, in percentages of 25, 50 and 75% through sieve number 4. The results show that the steel waste works on cohesive materials, reducing plasticity by up to 0%, and increasing the California Bearing Ratio (CBR) value, by 378.92%. It is possible to conclude that the steel waste is an excellent complement for improving the physical and mechanical properties of kaolinite clay subgrade. In a first approximation, the most recommended dosage is 25%, because the reduction of resistance to compression and plasticity index was not as high as in other dosages, but it increases the CBR index and the density.

Keywords : ground stabilization; subgrade; clays; pavement; mechanical properties.

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