ABSTRACT
The tests were carried out using ACPT that consists of ASTM C 1293 procedures with the specimens subjected to other conditions (60oC and relative humidity of 100% during three months). Expansions were measured every 14 days. The results show that:
Granite from Sao Paulo: The unprotected prism had an expansion of 0,055% in 90 days. This expansion demonstrates a deleterious behavior of the aggregate. However, the prisms that were protected with silicone had expansions less than the limit proposed in this test method (0,04%). So, the system (concrete + silicone) had an acceptable behavior. The results show that a surface protection with silicone reduced the expansion by 75% on average.
