Investigations of mixing technique on the rheological properties of self-compacting concrete - Details

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Abstract：

Rheological　properties　are　of　significant　importance　in　successful　placement　and　performance　of　self-compacting　concrete　(SCC).　In　this　work,　the　rheological　properties　of　SCC,　combined　with　a　powder-viscosity　modifying　admixture,　were　investigated　based　on　a　series　of　experimental　studies.　The　modified　Bingham　model　was　applied　to　determine　the　rheological　parameters　and　shear　thickening　behavior　of　SCC.　The　effects　of　mixing　procedures,　including　charging　sequence,　mixing　time　and　mixing　speed,　were　analyzed.　The　results　show　that　the　shear　thickening　of　SCC　is　reduced　by　first　mixing　the　aggregate　and　water　and　then　adding　other　raw　materials.　The　direct　contact　between　aggregate　and　water　leads　to　a　large　amount　of　free　water　to　be　adsorbed　by　the　aggregate　system,　resulting　in　an　increase　of　the　yield　stress.　In　order　to　ensure　an　excellent　fluidity　and　a　low　shear　thickening　behavior　of　SCC,　the　mixing　time　should　be　controlled　at　4-5　min　and　the　mixing　speed　at　30-45　r/min.　©　2020　by　the　authors.

Keyword：

Charging sequence; Mixing speed; Mixing time; Rheological properties; Self-compacting concrete

Community：

[ 1 ] [Li, H.]Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing, 100081, China
[ 2 ] [Li, H.]State Key Laboratory of High Speed Railway Track Technology, Beijing, 100081, China
[ 3 ] [Huang, F.]Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing, 100081, China
[ 4 ] [Huang, F.]State Key Laboratory of High Speed Railway Track Technology, Beijing, 100081, China
[ 5 ] [Yi, Z.]Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing, 100081, China
[ 6 ] [Yi, Z.]State Key Laboratory of High Speed Railway Track Technology, Beijing, 100081, China
[ 7 ] [Wang, Z.]Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing, 100081, China
[ 8 ] [Wang, Z.]State Key Laboratory of High Speed Railway Track Technology, Beijing, 100081, China
[ 9 ] [Zhang, Y.]College of Civil Engineering, Fuzhou University, Fuzhou, 350116, China
[ 10 ] [Zhang, Y.]Microlab, Section of Materials and Environment, Department of 3MD, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, 2628 CN, Netherlands
[ 11 ] [Yang, Z.]College of Civil Engineering, Fuzhou University, Fuzhou, 350116, China

Reprint 's Address：

[Zhang, Y.]College of Civil Engineering, Fuzhou University, College of Civil Engineering, Fuzhou UniversityChina

Email：

y.zhang@fzu.edu.cn

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Source ：

Applied Sciences (Switzerland)

ISSN： 2076-3417

Year： 2020

Issue： 15

Volume： 10

2 . 2 1 7

JCR@2018

CAS Journal Grade：3

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WoS CC Cited Count：

SCOPUS Cited Count： 7

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

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