Kneading and extrusion of dense polymer-cement pastes

被引：14
作者：
Lombois-Burger, H.
Colombet, P.
Halary, J. L.
Van Damme, H.
机构：
[1] UPMC, ESPCI, CNRS, UMR 7615,PPMD Lab, F-75231 Paris 05, France
[2] CTG Italcementi Grp, F-78931 Guerville, France
来源：
CEMENT AND CONCRETE RESEARCH | 2006年 / 36卷 / 11期
关键词：
kneading; extrusion; cement paste; polymer;
D O I：
10.1016/j.cemconres.2006.08.001
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The kneading and extrusion behavior of dense polymer-containing cement pastes has been investigated. Both the polymer to cement ratio (Plc) and the water to cement ratio (w/c) were varied. Three types of polymers - one adsorbing and two non-adsorbing on cement - were used. The kneading and extrusion parameters (dispersion energy, torque plateau value, extrusion pressure, paste ageing) were determined using instrumented kneader and ram extruder. As will be shown, the most important parameters controlling the efficiency of the kneading and extrusion processes are the cement volume fraction on the one hand and the polymer concentration in the interstitial solution on the other hand. Polymer adsorption is not a key phenomenon, whereas hydrodynamic lubrication is important. A simple free volume model for paste extrusion is proposed. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2086 / 2097
页数：12
相关论文
共 40 条
[1]  
Benbow John., 1993, PASTE FLOW EXTRUSION
[2]  
BOHM H, 1994, BRIT CERAM T, V93, P169
[3]   THE SUPERPLASTICIZER ADSORPTION CAPACITY OF CEMENT PASTES, PORE SOLUTION COMPOSITION, AND PARAMETERS AFFECTING FLOW LOSS [J].
BONEN, D ;
SARKAR, SL .
CEMENT AND CONCRETE RESEARCH, 1995, 25 (07) :1423-1434
[4]   Rheology of soft glassy materials [J].
Bonn, D ;
Coussot, P ;
Huynh, HT ;
Bertrand, F ;
Debrégeas, G .
EUROPHYSICS LETTERS, 2002, 59 (05) :786-792
[5]   Why do HPC and SCC require a longer mixing time? [J].
Chopin, D ;
de Larrard, F ;
Cazacliu, B .
CEMENT AND CONCRETE RESEARCH, 2004, 34 (12) :2237-2243
[6]  
De Gennes PG., 1979, SCALING CONCEPTS POL
[7]   Rheology and aging: A simple approach [J].
Derec, C ;
Ajdari, A ;
Lequeux, F .
EUROPEAN PHYSICAL JOURNAL E, 2001, 4 (03) :355-361
[8]   STUDIES IN NEWTONIAN FLOW .1. THE DEPENDENCE OF THE VISCOSITY OF LIQUIDS ON TEMPERATURE [J].
DOOLITTLE, AK .
JOURNAL OF APPLIED PHYSICS, 1951, 22 (08) :1031-1035
[9]   Experimental investigation of calcium silicate hydrate (C-S-H) nucleation [J].
Garrault-Gauffinet, S ;
Nonat, A .
JOURNAL OF CRYSTAL GROWTH, 1999, 200 (3-4) :565-574
[10]   Interaction between cement and chemical admixture from the point of cement hydration, absorption behaviour of admixture, and paste rheology [J].
Hanehara, S ;
Yamada, K .
CEMENT AND CONCRETE RESEARCH, 1999, 29 (08) :1159-1165
1234