Resumo

HANCOCK, J.D.. Potassium silicate concretes in sulphuric acid environments at ambient and low temperature in South Africa. J. S. Afr. Inst. Min. Metall. [online]. 2017, vol.117, n.11, pp.1019-1022. ISSN 2411-9717.  http://dx.doi.org/10.17159/2411-9717/2017/v117n11a5.

The paper examines the ongoing development of quartz aggregate potassium silicate concretes at the C Laboratories. The original concrete using a sodium fluosilicate setting agent was found to have site problems in South Africa under certain conditions, but not in the UK. The bonding system was modified for local applications, and examples of successful site applications are provided. During 2016 an alternative setting agent only available in South Africa was identified, and this has led to the work on a new acid-resistant concrete that utilizes solid potassium silicate rather than a liquid silicate.

Palavras-chave : acid-resistant concrete; crushing strength; setting agent; sodium fluosilicate; potassium silicate.

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