Variability in cement properties - influence on bleeding of cement paste

Construmat 2018

Jancarikova, D.^1 ; Hela, R.^1 ; Netsvet, D.^2 ; Perina, T.^3

Brno University of Technology, Faculty of Civil Engineering, AdMaS Centre, Purkynova 139, Brno

612 00, Czech Republic^1

Belgorod State Technological University Named after V.G. Shoukhov, Ulitsa Kostyukova, 46, Belgorod

308012, Russia^2

Brno University of Technology, Faculty of Civil Engineering, Veveri 331, Brno

602 00, Czech Republic^3

关键词: Alkali contents;    Cement paste;    Cement properties;    Cement sample;    Granulometries;    Setting time;    Specific surface;    Superplasticizers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/385/1/012021/pdf
DOI  :  10.1088/1757-899X/385/1/012021

来源: IOP

【 摘 要 】

The aim of this study is to find relation between cement properties and tendency of cement paste (concrete) to bleeding. We tested 19 cement samples collected from different batches. On cements were tested granulometry, specific surface, strengths, alkali content, content of C3A modifications, setting times and bleeding. Tendency to bleeding of all 19 samples was tested in 3 types of cement paste mixtures. One reference mix and two mixtures with superplasticizers from different producers. Results show, that we can see partly relation between specific surface area and tendency to bleeding. With lower specific surface area, the tendency to bleeding is higher. While the content of alkali seems to have small influence. Where the higher content of alkali means higher tendency to bleeding. On the other hand, these results are not conclusive and it is required further testing on different parameters such as content of sulphur and type of gypsum added to clinker during grinding.