Influence of Sample Preparation and Salt Concentration on the Superplasticizer Adsorption Quantification in Cement-Based Pore Solutions by Total Organic Carbon (TOC) Method

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Title: Influence of Sample Preparation and Salt Concentration on the Superplasticizer Adsorption Quantification in Cement-Based Pore Solutions by Total Organic Carbon (TOC) Method

Author(s): G. Albrecht and M. Vierle

Publication: Special Publication

Volume: 262

Issue:

Appears on pages(s): 321-334

Keywords: adsorption; aggregates; superplasticizers; total organic carbon (TOC).

Date: 10/1/2009

Abstract:
Total Organic Carbon (TOC) measurement of cementitious pore solutions for quantification of (super)plasticizer adsorption was reviewed in this study with a system of two Polycarboxylate Ethers (PCE) and one Naphtalene Sulfonate polymer (BNS) in combination with 3 different cements. The influence of pore solution salt concentrations as well as different methods for pore solution extraction on the measured amount total organic carbon have been investigated. Adsorption measurements in paste, mortar and concrete systems are compared and conclusions are drawn by summarizing and interpreting the results obtained in the studies.