Averiguação da presença de polímero superabsorvente em compostos cimentícios no estado fresco

Abstract

The growing trend of building increasingly tall and slender projects and projects located in aggressive environments caused an increase in the use of High Strength Concrete (CAR) which consequently stimulated researchers to increasingly seek new materials that aim to solve their shortcomings. One of these materials is the Superabsorbent Polymer (SAP), which is defined according to RILEM as a synthetic material with a great capacity to absorb a large amount of liquid from the environment and retain it without dissolution in its structure. The purpose of applying SAP in CARs is to generate an internal healing process to stop the propagation of the autogenous shrinkage phenomenon. The absence of standardized procedures to verify the presence of SAP in large batches of concrete at a construction site makes it necessary to carry out interlaboratory tests that aim to establish verification standards so that the batch can be accepted or rejected. This work dealt with the performance and analysis of the results of an interlaboratory test, established and recommended by the 260-RSC committee of RILEM, about the presence of Superabsorbent Polymer (SAP) in high-strength cementitious compounds in the fresh state.