| Title |
Retarding Property of Cement Mortar with Gluconic Acid Type and Additive Ratio |
| Keywords |
Super Retarding Agent ; Setting Time ; Gluconic Acid ; Gluconic Na |
| Abstract |
This paper investigates experimentally the effect of gluconic acid type and contents on fundamental and retarding properties of cement mortar. An increase in gluconic acid dosage lead to increase in flow of cement mortar. Flow loss with the elapse of time of cement mortar with gluconic acid exhibited superior to that using control mortar. Gluconic acid type A and B have comparably improved flow loss with age compared with type C. For the effect on setting time, the use of gluconic acid results in a retarding of setting time to the extent of several time to several days compared with control cement mortar. Both type A and B exhibit higher setting retarding than type C. Compressive strength is somewhat dependent of gluconic acid type and contents. On the other hand, compressive strength is not highly affected by the use of gluconic acid. In the aspect of economical advantage, the use of type C is more reasonable to achieve 2 days retardation of setting time, On the other hand, the use of B is the cheapest way to gain setting retardation beyond 2 days. |