Document Type : Original Article
Authors
1
Department of Civil Engineering, Technical and Vocational University (TVU), Shahid Bahonar Faculty of Engineering, Shiraz, Technical and Vocational University
2
Department of Architecture and Urban Planning, Shahid Bahonar Faculty of Engineering, Shiraz, Technical and Vocational University
3
Department of Architecture and Urban Planning, Technical and Vocational University (TVU), shiraz, Iran, P. O. Box: 1435761137
Abstract
Concrete is one of the most significant and widely utilized materials in road and building construction. The usage of colored concrete in urban development projects can play a valuable role in improving urban aesthetics metrics. This research aims to investigate the effect of Limonite pigment (a yellow mineral pigment native to Iran) on concrete's compressive, tensile, and abrasion resistance, with emphasis on the decoration of contemporary cities. In this regard, samples of colored concrete replaced cement in concrete using limonite pigment in different weight ratios of 5, 10, 15, and 20 %. The newly colored concrete was subjected to compressive, tensile, and abrasion resistance tests. The compressive strength test results showed that iron oxide in Limonite pigment could increase the compressive strength of concrete. However, the results of concrete tensile and abrasion resistance tests show that adding 5, 10, 15, and 20 percent of pigment can reduce tensile strength by 4, 8, 19, and 29 % and abrasion resistance by 9, 19, 28, and 38 %. Therefore, colored concrete with a 15 % Limonite pigment rate or more; should be used to optimize urban decoration or ornamentation like flooring, urban elements, and urban passages. In this case, other pozzolanic additives such as micro silica, fly ash, steel fibers, and polypropylene should be utilized to increase concrete's abrasion resistance.
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