Physico-Mechanical Properties of Cellulose Fiber-Cement Mortars

This paper is aimed to investigate the total sand filler replacement by two types of cellulosic fibers (bleached wood pulp - WP and recycled fibers from waste paper - RF) in cement-based mortars. Two different types of cement mortar, one with addition of finely ground limestone and other with powder...

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Bibliographic Details
Published in:Key engineering materials 2020-04, Vol.838, p.31-38
Main Authors: Václavík, Vojtěch, Hospodarova, Viola, Dvorský, Tomáš, Števulová, Nadežda
Format: Article
Language:English
Subjects:
Adhesion tests
Adhesive strength
Aeration
Bleaching
Cellulose fibers
Cement
Ceramic fibers
Compressive strength
Concrete blocks
Cracks
Flexural strength
Granulation
Hardening
Limestone
Mechanical properties
Mortars (material)
Slag
Substrates
Time dependence
Wood pulp
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Summary:This paper is aimed to investigate the total sand filler replacement by two types of cellulosic fibers (bleached wood pulp - WP and recycled fibers from waste paper - RF) in cement-based mortars. Two different types of cement mortar, one with addition of finely ground limestone and other with powdered granulated slag, were mixed with fibers. The changes in consistency of fresh fiber cement mortars and development of compressive and flexural strength of mortars in dependence on hardening time up to 90 days was studied. The development of compressive and flexural strength with increasing hardening time of cellulose fiber mortars and two binders with different properties confirmed that binder mixtures containing finely ground slag and recycled cellulose fibers achieved higher values of these strength parameters. Also adhesion testing of fiber cement mortars on two substrates (ceramic fitting and aerated concrete block) after 28 days of their application showed better adhesion of cement mortars with finely ground granulated slag on the ceramic fitting surface compared to the mortars containing finely ground limestone. However, any cracks have occurred on both substrates during the maturing of mortars with slag. Based on the above facts, it can be concluded that suitable plaster mixtures for their use in the interior appear the cement recipes with both cellulose fibers (wood pulp and fibers from recycled waste paper) and with finely ground limestone.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.838.31