Sucrose and Lignosulfonate Acid: Which One is More Effective as a Concrete Setting Retarder? (original) (raw)

Key Engineering Materials, 2021

Abstract

The goal of this study is to experimentally evaluate the performance of sucrose and lignosulfonate acid as a concrete retarder. The initial and final setting times of concrete are obtained for various dosages of those admixtures. Besides, the impact of those retarders to the compressive strength of concrete is also explored. A total of 13 (thirteen) mix samples are made, in a laboratory, by adding various dosages of those admixtures into the reference mixtures. Those samples are tested using a concrete mortar penetrometer and a compression-testing machine to obtain their setting times and compressive strengths. Sucrose addition with a dosage of 0.01%, 0.014%, and 0.019% (by weight of cement) increases the initial setting time by 102.67%, 117.54%, and 138.89% and extends the final setting time by 57.70%, 72.83%, and 99.47%. The addition of liquid lignosulfonate acid by 0.6% (by weight of cement) causes the initial setting time to grow by 68.77% from 4.46 to 7.52 hours. Similarly, the...

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