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Characterization of cementitious mortar with addition of fibers from waste paper

Characterization of cementitious mortar with addition of fibers from waste paper As a contribution in resolving some defects frequently encountered in conventional mortars, such as the lack of good flexural strength and cracks propagation, sand was partially substituted by fibers from waste paper in a standardized Portland cement-sand mortar. The weight ratios of sand and paper were: (0/6)S, (1/12)S, (1/6)S, (2/6)S, (3/6)S, (4/6)S, (5/6)S and (6/6)S. Fibers from waste paper used were of two types: One from secretariat paper and the other from newspaper. Tests were performed in fresh and hardened materials. Results at 7 days and 28 days showed that: the incorporation in the mortar of small quantity (1/12)S of fibers from waste paper improved compressive, flexural and tensile strength of mortars. Mortars containing newspaper had better mechanical properties than those containing secretariat papers. The incorporation of fibers from waste paper from (1/6)S to (6/6)S in the mortar increased the initial and final setting time of the cement, reduced the workability of the mortar, the compressive, flexural and tensile properties dropped progressively as the quantity of paper in the mortar increased, considerably solved the problem of shrinkage, decreased the apparent density of the mortar and increased water absorption as the fibers from waste paper increased in the mortar. Immersion of mortars in reactive environments (acetic acid and sodium hydroxide) showed a loss of compressive and tensile strength of the mortar specimens. Given its low weight, low density, good mechanical properties, this new material could be used in the manufacture of lightweight panels not exposed to chemical aggressive environments. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Characterization of cementitious mortar with addition of fibers from waste paper

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References (51)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-022-00187-w
Publisher site
See Article on Publisher Site

Abstract

As a contribution in resolving some defects frequently encountered in conventional mortars, such as the lack of good flexural strength and cracks propagation, sand was partially substituted by fibers from waste paper in a standardized Portland cement-sand mortar. The weight ratios of sand and paper were: (0/6)S, (1/12)S, (1/6)S, (2/6)S, (3/6)S, (4/6)S, (5/6)S and (6/6)S. Fibers from waste paper used were of two types: One from secretariat paper and the other from newspaper. Tests were performed in fresh and hardened materials. Results at 7 days and 28 days showed that: the incorporation in the mortar of small quantity (1/12)S of fibers from waste paper improved compressive, flexural and tensile strength of mortars. Mortars containing newspaper had better mechanical properties than those containing secretariat papers. The incorporation of fibers from waste paper from (1/6)S to (6/6)S in the mortar increased the initial and final setting time of the cement, reduced the workability of the mortar, the compressive, flexural and tensile properties dropped progressively as the quantity of paper in the mortar increased, considerably solved the problem of shrinkage, decreased the apparent density of the mortar and increased water absorption as the fibers from waste paper increased in the mortar. Immersion of mortars in reactive environments (acetic acid and sodium hydroxide) showed a loss of compressive and tensile strength of the mortar specimens. Given its low weight, low density, good mechanical properties, this new material could be used in the manufacture of lightweight panels not exposed to chemical aggressive environments.

Journal

Journal of Building Pathology and RehabilitationSpringer Journals

Published: Dec 1, 2022

Keywords: Reinforced mortar; Cement; Fiber mortar; Waste paper; Physical properties; Mechanical properties

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