Influence of aggregate coated with modified sulfur on the properties of cement concrete

Swoo Heon Lee, Ki Nam Hong, Jae Kyu Park, Jung Ko

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

This paper proposes the mixing design of concrete having modified sulfur-coated aggregate (MSCA) to enhance the durability of Portland cement concrete. The mechanical properties and durability of the proposed MSCA concrete were evaluated experimentally. Melting-modified sulfur was mixed with aggregate in order to coat the aggregate surface at a speed of 20 rpm for 120 s. The MSCA with modified sulfur corresponding to 5% of the cement weight did not significantly affect the flexural strength in a prism concrete beam specimen, regardless of the water-cement ratio (W/C). However, a dosage of more than 7.5% decreased the flexural strength. On the other hand, the MSCA considerably improved the resistance to the sulfuric acid and the freezing-thawing, regardless of the sulfur dosage in the MSCA. The coating modified sulfur of 5% dosage consequently led to good results for the mechanical properties and durability of MSCA concrete.

Original languageEnglish
Pages (from-to)4739-4754
Number of pages16
JournalMaterials
Volume7
Issue number6
DOIs
StatePublished - 2014

Keywords

  • Acid resistance
  • Coated aggregate
  • Durability
  • Freezing-thawing
  • Modified sulfur
  • Strength

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