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Main Title: A Systematic Study on Polymer-Modified Alkali-Activated Slag−Part II: From Hydration to Mechanical Properties
Author(s): Lu, Zichen
Merkl, Jan-Philip
Pulkin, Maxim
Firdous, Rafia
Wache, Steffen
Stephan, Dietmar
Type: Article
Abstract: The effect of styrene-acrylate (SA) polymer latex on alkali-activated slag (AAS) was systematically studied in the aspects of hydration, hydration products, pore structure and mechanical properties through the combined analytical techniques including calorimetry, X-ray diffraction, thermogravimetric analysis, mercury intrusion porosimetry, and mechanical measurement. It was found that the addition of SA does not retard the AAS hydration, but slightly accelerates it, possibly due to the increasing ion diffusion through the loosely structured hydration products. Pore structure analysis indicates that the addition of polymer increases the cumulative pore volume and the portion of pores with size >100 nm in the hardened AAS paste. The addition of SA latex results in a continuous decrease of the compressive strength, but the flexural strength firstly increases and then decreases with the increase of polymer dosage. The polymer dosage of 2.5 wt % is optimal when applying polymer latex in the AAS system in this study.
Subject(s): polymer
alkali-activated slag
mechanical properties
Issue Date: 3-Aug-2020
Date Available: 9-Dec-2020
Language Code: en
DDC Class: 600 Technik, Technologie
Sponsor/Funder: TU Berlin, Open-Access-Mittel – 2020
Journal Title: Materials
Publisher: MDPI
Volume: 13
Issue: 15
Article Number: 3418
Publisher DOI: 10.3390/ma13153418
EISSN: 1996-1944
TU Affiliation(s): Fak. 6 Planen Bauen Umwelt » Inst. Bauingenieurwesen » FG Baustoffe und Bauchemie
Appears in Collections:Technische Universität Berlin » Publications

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