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<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n<\/figure>\n\n\n\nThe finish is also ideal for preparing concrete surfaces that will receive a subsequent layer. Whether it is a waterproofing membrane, screed or cladding, the roughened texture created by the exposed aggregate allows for superior bonding, improving the durability and lifespan of the entire system. This makes it a preferred solution not only in aesthetic applications but also where structural performance is key.<\/p>\n\n\n\n
Chryso Southern Africa offers surface retarders designed specifically to meet these evolving needs. The company\u2019s products facilitate reliable consistent exposure of the aggregate to the required depth \u2013 up to a maximum of 3 mm \u2013 ensuring a uniform and high quality result. This is essential for specialist applicators who rely on precision and repeatability, particularly in large-scale or architecturally sensitive projects.<\/p>\n\n\n\n \u201cThe simplicity of the application process is another advantage,\u201d Fick explains. \u201cAfter the concrete is poured, the surface retarder must be applied evenly before the concrete begins to set. Following a predetermined curing period the surface is washed with water, removing the top layer of cement paste and revealing the aggregate below. A final sealant is then applied to enhance the surface\u2019s durability and finish.\u201d<\/p>\n\n\n\n Sealants can be selected to suit different environments and project need including internal and external use, UV resistance and finishes ranging from matte to high-gloss. This flexibility allows architects and contractors to customise the final appearance while ensuring long term performance.<\/p>\n\n\n\n Significantly, Chryso was the first manufacturer to offer a mineral solvent-free water-based retarder designed to prevent soil and groundwater pollution during the cleaning of treated concrete. The product contains no toxic substances, is 85% biodegradable, classified as harmless and complies with EEC Directives 88\/379 and 93\/18.<\/p>\n\n\n\n Fick notes that Chryso\u2019s surface retarders are developed with the applicator in mind, offering not only technical consistency but also ease of use in site conditions that can often be challenging. \u201cOur retarders provide reliable performance even under variable temperature and humidity conditions, which is critical for projects with tight timelines and complex environmental demands.\u201d<\/p>\n\n\n\n With sustainability and safety continuing to drive specification choices in the built environment, the use of exposed aggregate finishes is expected to grow. \u201cThe combination of visual impact, surface durability, slip resistance and improved bonding makes it a smart choice for both new builds and renovations,\u201d Fick concludes. \u201cAs the trend gains momentum, we are committed to supporting the market with reliable solutions that ensure consistent high quality results.\u201d<\/p>\n\n\n\n As urban spaces evolve and developers seek more creative yet practical finishes, the role of surface retarders – and particularly exposed aggregate – is likely to become even more prominent in shaping the look and functionality of tomorrow\u2019s concrete structures.<\/p>\n","protected":false},"excerpt":{"rendered":" An upward trend in the use of surface retarders in South Africa\u2019s construction and infrastructure sector is shining a spotlight on the increasing popularity of exposed aggregate concrete finishes. According to Michelle Fick of Chryso Southern Africa, this trend reflects a growing appreciation for both the aesthetic and functional benefits that exposed aggregate offers. \u201cExposed … Continue reading EXPOSED AGGREGATE IN THE SPOTLIGHT AS DEMAND FOR SURFACE RETARDERS RISES<\/span> <\/a><\/figure>\n\n\n\n<\/a><\/figure>\n<\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n<\/figure>\n\n\n\n