On the mechanisms of consumption of calcium lignosulfonate by cement paste

被引：21
作者：
Colombo, A. [1 ]
Geiker, M. [1 ]
Justnes, H. [1 ,2 ]
Lauten, R. A. [3 ]
De Weerdt, K. [1 ]
机构：
[1] Norwegian Univ Sci & Technol, Dept Struct Engn, Trondheim, Norway
[2] SINTEF Bldg & Infrastruct, Trondheim, Norway
[3] Borregaard, Sarpsborg, Norway
来源：
CEMENT AND CONCRETE RESEARCH | 2017年 / 98卷
关键词：
PORTLAND-CEMENT; SURFACE-AREA; SUPERPLASTICIZERS; ADSORPTION; SYSTEMS; TIME; INTERCALATION; COPOLYMERS; ADMIXTURE; HYDRATION;
D O I：
10.1016/j.cemconres.2017.02.026
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The aim of this paper is to assess the mechanisms of consumption of softwood calcium lignosulfonate (LSs) by cement paste. The LSs consumption by two different cements (CX and ANL) and two reference materials (CaCO3 and Ca(OH)(2)) was investigated, either by adding the LSs immediately with the mixing water (IA) or after 10 min of hydration (DA). For IA, the increase in LSs dosage caused additional ettringite formation and an increase in particle surface area. This was not observed for DA. Since no AFm phase could be detected, intercalation in AFm seemed not to occur for the investigated materials. The main mechanism of LSs consumption for CX cement (both for IA and DA) and for ANL cement (only for DA) appeared to be monolayer adsorption. For IA, the amount of consumed LSs could not be ascribed exclusively to monolayer surface adsorption and other LSs consumption mechanisms might play a role. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1 / 9
页数：9
相关论文
共 35 条
[1]   Influence of time addition of superplasticizers on the rheological properties of fresh cement pastes [J].
Aiad, I .
CEMENT AND CONCRETE RESEARCH, 2003, 33 (08) :1229-1234
[2]  
[Anonymous], 1992, HDB CHEM PHYS
[3]  
[Anonymous], CEMENT CONCRETE RES, DOI DOI 10.1016/0008-8846(95)00055-H
[4]  
Bessaies-Bey H., 2014, CEMENT CONCRETE RES, V54, P17
[5]   ICP-OES method for the characterization of cement pore solutions and their modification by polycarboxylate-based superplasticizers [J].
Caruso, Francesco ;
Mantellato, Sara ;
Palacios, Marta ;
Flatt, Robert J. .
CEMENT AND CONCRETE RESEARCH, 2017, 91 :52-60
[6]   OPTIMUM TIME FOR ADDING SUPERPLASTICIZERS TO PORTLAND-CEMENT PASTES [J].
CHIOCCHIO, G ;
PAOLINI, AE .
CEMENT AND CONCRETE RESEARCH, 1985, 15 (05) :901-908
[7]   SOME VISCOSITY PROPERTIES OF LIGNOSULFONATES ISOLATED BY ULTRAFILTRATION [J].
COLLINS, JW ;
TORKELSON, JM ;
WEBB, AA .
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1977, 25 (04) :743-746
[8]  
Flatt R.J., 1999, Interparticle Forces and Superplasticizers in Cement Suspensions
[9]   A simplified view on chemical effects perturbing the action of superplasticizers [J].
Flatt, RJ ;
Houst, YF .
CEMENT AND CONCRETE RESEARCH, 2001, 31 (08) :1169-1176
[10]   Dispersity in polymer science (IUPAC Recommendations 2009) (vol 81, pg 351, 2009) [J].
Gilbert, R. G. ;
Hess, M. ;
Jenkins, A. D. ;
Jones, R. G. ;
Kratochvil, R. ;
Stepto, R. F. T. .
PURE AND APPLIED CHEMISTRY, 2009, 81 (04) :779-779
1234