THE JOURNAL OF KMUTNB

Volume 33, No. 02, Month APRIL, Year 2023, Pages -

A study of compressive strength and weight loss of mortars coating with geopolymer paste with field para rubber latex in sulfuric acid and seawater

Abideng Hawa, Preecha Saleamea, Woraphot Prachasaree

Abstract Download PDF

The infrastructure of reinforced concrete structures such as bridge, port, concrete pavement, and building in developing countries were built over half- century old. The reinforced concrete structures near seawater were damaged due to high amount of chloride and sulfate. Geopolymer is an affordable material with promising applications in concrete structure coating for protecting steel rust. The proportions of geopolymer paste for cement mortar coating consisted of metakaolin (MK) and an alkaline activator. The viscous liquid of geopolymer paste was prepared with an alkaline activator and water by various ratios of 1.0, 0.75, and 0.6 and 0.2, 0.3, and 0.4 by weight respectively, with 1 and 2 coating layers. The amount of field Para Rubber Latex (FPRL) at 0.5, 1, 3, 5, and 10 by weight were used to substitute MK. The geopolymer samples were cured at 80 °C and at ambient temperature for 24 hours. The compressive strength and weight loss with submerged sulfuric acid and weight loss with submerged seawater were subsequently tested on the curing days of 28, 56, and 90. The test results showed that the coating samples could protect them from damage and weight loss at every ratio of mixtures compared with the uncoated samples.

Keywords

Sea Water; Geopolymer; Metakaolin; Sulfuric Acid; Field Para Rubber Latex

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