Shear-Thickening Behavior of Cement Pastes under Combined Effects of Mineral Admixture and Time

被引：12

作者：

Yang, Hu ^{[1
]}

Lu, Cairong ^{[1
]}

Mei, Guoxing ^{[1
]}

机构：

[1] Nanjing Hydraul Res Inst, State Key Lab Hydrol Water Resources & Hydraul En, R&D Ctr Hydropower Engn Safety & Environm Technol, Res Ctr New Mat Hydraul Struct,Minist Water Resou, Nanjing 210029, Jiangsu, Peoples R China

来源：

JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2018年 / 30卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Rheology; Shear thickening; Water addition time; Mineral admixture; Cement paste; SELF-COMPACTING CONCRETE; RHEOLOGICAL BEHAVIOR; CONSOLIDATING CONCRETE; 2-POINT TEST; WORKABILITY; RHEOMETER; PRESSURE;

D O I：

10.1061/(ASCE)MT.1943-5533.0002123

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The fresh-state behavior of plain and silica fume (SF)-modified cement pastes was measured using a wide-gap viscometer. The Herschel-Bulkley (H-B) model was used to describe the rheology of fresh cement pastes. The H-B parameters (including yield stress, consistency coefficient, and flow index) under coupling effect of SF and water addition time were provided. According to the experimental results, the shear-thickening behavior was found to be strongly influenced by the SF content as well as the time after water addition. The flow index declined with SF and water addition time in general. Finally, simplified models were constructed by forecasting the value of flow index as well as H-B yield stress of pastes containing different mineral admixtures under coupled SF content and water addition time.

引用

页数：10

共 25 条

[1] Time-dependent rheological characteristics of self-consolidating concrete containing various mineral admixtures [J].

Ahari, Reza Saleh ;

Erdem, Tahir Kemal ;

Ramyar, Kambiz .

CONSTRUCTION AND BUILDING MATERIALS, 2015, 88 :134-142

[2]

[Anonymous], 1990, JSCEF503

[3] Impact of superplasticizer concentration and of ultra-fine particles on the rheological behaviour of dense mortar suspensions [J].

Artelt, C. ;

Garcia, E. .

CEMENT AND CONCRETE RESEARCH, 2008, 38 (05) :633-642

[4]

Barnes HA, 1989, An introduction to rheology, V3

[5] Influence of steel fibres addition on mechanical and selected rheological properties of steel fibre high-strength reinforced concrete [J].

Bywalski, C. ;

Kaminski, M. ;

Maszczak, M. ;

Balbus, L. .

ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING, 2015, 15 (03) :742-750

[6] Crushed sand in concrete - Effect of particle shape in different fractions and filler properties on rheology [J].

Cepuritis, Rolands ;

Jacobsen, Stefan ;

Pedersen, Bard ;

Mortsell, Ernst .

CEMENT & CONCRETE COMPOSITES, 2016, 71 :26-41

[7] Modelling the rheological behaviour of fresh concrete: An elasto-viscoplastic finite element approach [J].

Chidiac, SE ;

Habibbeigi, F .

COMPUTERS AND CONCRETE, 2005, 2 (02) :97-110

[8]

Chinese National standard, 2007, 1752007 GB CHIN NAT

[9] Study of the shear thickening effect of superplasticizers on the rheological behaviour of cement pastes containing or not mineral additives [J].

Cyr, M ;

Legrand, C ;

Mouret, M .

CEMENT AND CONCRETE RESEARCH, 2000, 30 (09) :1477-1483

[10] Developments of the two-point workability test for high-performance concrete [J].

Domone, PLJ ;

Yongmo, X ;

Banfill, PFG .

MAGAZINE OF CONCRETE RESEARCH, 1999, 51 (03) :171-179

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