Sugar is retarding agent.
Retarders are type of admixture that extend the hydration induction period, thereby increasing the setting times. Sugar is a carbohydrate, a substance composed of carbon, oxygen and hydrogen. It can be useful when concrete used in hot weather.
- Sugar is used as a retarder for a concrete mix.
- The setting time of concrete increases with increase in the percentage of sugar up to 0.06% by weight of cement. Beyond 0.06% use of sugar it is found that the both initial and final setting times drastically reduces. Sugar when used in correct proportion acts as retarder.
- Sugar upto 0.06% helps to delay the setting of cement at construction site during hot weather concreting.
- It is cheap and readily available. If used carefully, it could be economical in comparison with other retarders.
- Furthermore, most of the studies conducted on the use of sugar as a set retarder focused on the setting time of such concretes, without much emphasis on the effect of adding sugar on strength. Still some studies observed that, the concrete mixture with 0.06% of sugar had more 28-day compressive strength, by about 14.64 MPa, as compared to the concrete without sugar.