Abstract
The duration of concrete transportation to the construction site, its workability and formwork
removal time are significantly affected by the setting time of cement. Therefore, it is of great importance to
know the initial and final setting times of concrete mixtures in construction applications. According to the
literature survey, the setting time of cementitious systems is generally determined on cement paste mixture by
the Vicat test. However, it was understood that a limited number of studies were carried out on the
determination of the setting time using concrete mixtures. In this study, the effect of cement C3A ratio variation
on the initial and final setting times of cementitious systems was determined using mortar mixtures. For this
purpose, mortar mixtures were prepared by using cement having four different C3A content (2%, 3%, 6% and
9%). The ratios of water/cement and sand/cement as well as slump-flow values were kept constant as 0.485,
2.75 and 27±2 cm, respectively. In order to provide the desired flowability, polycarboxylate ether-based waterreducing admixture (PCE) was used. The initial and final setting times of the mortar mixtures were determined
using a concrete penetrometer equipment. According to the results, PCE demand to provide the target slumpflow value increased by increasing the cement C3A content. In addition, the setting time values reduction was
observed with the increase of cement C3A content. It was determined that the results obtained are compatible
with the literature.
Keywords
Details
| Primary Language | English |
|---|---|
| Subjects | Engineering |
| Journal Section | Articles |
| Authors | |
| Publication Date | December 31, 2022 |
| Published in Issue | Year 2022Volume: 21 |
