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Recycling of Paper Waste in the Composition of Plastering Mortars

December 2014
Procedia Technology 12:295–300

DOI:10.1016/j.protcy.2013.12.489

License
CC BY-NC-ND 3.0

Authors:

Technical University of Cluj-Napoca

The paper presents a study on the recycling of paper waste, which is frequently found in almost all activity areas, in order to obtain an ecological plastering mortar. The materials used, in four mortar recipes, as well as the methods for their preparation are presented. The research leads to the conclusion that the methods for the preparation of plastering mortars with paper waste allows for the use of non-polluting technology with low energy consumption. Following the tests to which the test tubes were submitted, the optimal proportion of paper in the recipe for the manufacture of the material was determined.

Available via license: CC BY-NC-ND 3.0

Content may be subject to copyright.

Procedia Technology 12 ( 2014 ) 295 – 300

Selection and peer-review under responsibility of the Petru Maior University of Tirgu Mures.

doi: 10.1016/j.protcy.2013.12.489

ScienceDirect

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Available online at www.sciencedirect.com

Selection and peer-review under responsibility of the Petru Maior University of Tirgu Mures.

296 Claudiu Aciu et al. / Procedia Technology 12 ( 2014 ) 295 – 300

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Circular-Economy-Based Approach to Utilizing Cardboard in Sustainable Building Construction

Article

Full-text available

Jan 2023

Circular-economy-based sustainability approaches in construction are gaining wide acceptance due to the volume of waste generation and increasing demand for natural materials. Propelled by the recent timber shortage in Australia and the issues of waste management of cardboard, this study aims to analyse the possibilities of using cardboard as a construction material, based on its initial strength and multiple recycling options. A systematic review of research papers published in the last 40 years has been undertaken using a single keyword search to select the database. The review is presented in terms of the characteristics of the cardboard, dimensional stability, durability, structural strength, design, and analysis of cardboard. Recurring themes are evaluated using a latent Dirichlet allocation approach to identify the factors that ascertain the suitability of cardboard. Analysis reveals that despite certain constraints, such as water absorption and fire resistance, cardboard can be used as a replacement for timber by overcoming such limitations. This observation has benefits for the construction industry and the recycling industry. This study found that cardboard adheres to the circular economy principles, which should inspire policymakers. The paper concludes by highlighting the current circumstances and scientific challenges that impede the usage of cardboard in construction and recommends potential works needed to address these challenges for the benefit of practitioners and researchers.

Mechanical, Durability, and Microstructure Assessment of Wastepaper Fiber-Reinforced Concrete Containing Metakaolin

Article

Full-text available

May 2024

This study evaluates the potential use of discarded plasterboard paper as fibers from buildings to reinforce concrete. Various concentrations of wastepaper fibers (0.5%, 1%, 1.5%, 2%, and 2.5% by weight of the binder) were investigated in this research. To mitigate the water absorption effect of the paper fibers, metakaolin was employed as a partial cement replacement. The results demonstrate that the inclusion of the wastepaper fiber enhances the mechanical and durability performance of the concrete. The optimal fiber proportion was identified as 1%, leading to a 29% increase in the compressive strength, a 38% increase in the splitting tensile strength, a 12% decrease in the water absorption, and a 23% decrease in the drying shrinkage with respect to the concrete containing 20% metakaolin. However, exceeding this optimal fiber content results in decreased mechanical and durability properties due to the fiber agglomeration and non-uniform fiber distribution within the concrete matrix. Based on the microstructural analysis, the improved performance of the concrete is ascribed to decreased porosity, more refined pore structure, and reduced propagation of microcracks within the concrete matrix in the presence of wastepaper fiber. According to the results, concrete containing 20% metakaolin and 1% wastepaper fiber exhibits durability and mechanical properties comparable to those of the traditional concrete. This finding highlights the significant promise of reducing dependency on conventional cement and incorporating suitable recycled materials, such as discarded plasterboard, and secondary by-products like metakaolin. Such a strategy encourages the preservation of resources, reduction in carbon dioxide emissions, and a decrease in the ecological footprint resulting from concrete production.

Investigación de psicología

Book

Full-text available

Dec 2018

La facultad de Ciencias Sociales y el programa de Psicología de la UCO, con el apoyo de la Asociación Colombiana de Facultades de Psicología (Ascofapsi), presentamos a toda la comunidad académica el libro denominado Investigación en Psicología, el cual hace parte de la colección «Cuadernos de Ciencias Sociales ». Este es fruto del trabajo mancomunado de diferentes personas e instituciones que, interesados en ampliar el conocimiento psicológico, han desarrollado estudios rigurosos que responden al interés de dar fundamentación y bases firmes a la ciencia del comportamiento, en estos momentos en el que la psicología está llamada a dar respuestas contundentes para promover el bienestar de las personas por encima de prácticas carentes de validez o ejercidas fuera de lo científico, lo cual solo se consigue desde la investigación y la teoría rigurosamente desarrollada. Este libro logra consolidar el interés y la constante actividad investigativa de los psicólogos en Colombia, siendo muestra fehaciente de que existe una madurez en el gremio, en especial desde las facultades y los programas de Psicología; estos buscan la generación de conocimiento que permita sentar posición, dignificar la profesión e impactar significativamente en las personas.

Compressive Strength Evaluation of Cured Cement Mortar including Rubber, Foam, Plastic, and Paper Wastes as Partial Replacement with Sand

Article

Jan 2023

Samy Elbialy

Waste materials pollution has instigated a serious environmental problem for decades, therefore new initiatives have been taken around the world to recycle wastes into construction materials in recent years. This study applied the compressive strength as one of the key parameters to examine the characteristics of materials, it was conducted to investigate the efficiency of adding different waste materials to cement mortar mixture as partial replacement with sand. Crumbed rubber, expanded polystyrene (foam), shredded wastepaper, and shredded plastic bags were selected to examine the efficiency of adding them to cement mortar. These waste materials were mixed individually with cement, sand and water proportionally. The produced mixture of each waste materials was casted in standard cubes and cured in water for different ages 3, 7 and 28 days. The compressive strength of the cured cubes was tested, the results showed that over all tested ages, plastic-based mortar provided the lowest compressive strength variance values by -7.4, -6.7%, and -5.4% in comparison with tested reference mortar. Rubber-based mortar showed the highest variance by -58.5 % at 3 days, -58.3% after 7 days and -55.5 % after 28 days. Foam comes next to Plastic-based mortar then Paper-based mortar by -13.7 & -37 % after 3 days, -11.3 & -34 % after 7 days and -14 & -26 % after 28 days respectively. In comparison to ASTM C129, the results ranges supported the possibility of using cement mortar mixed with shredded plastic, foam and shredded wastepaper in producing non-loadbearing concrete masonry units.

The recyclability and printability of electrophotographic printed paper

Article

Full-text available

Jun 2022

Paper is the most successful recycled material from commercial and municipal wastes. Part of recycled paper requires deinking to meet the product requirement, such as tissue, printing grade and newspaper. The original print method plays a major role in deinking performance. The digital print methods, such as electrophotographic (or laser) print, have been rapidly adapted in the commercial printing. Paper mills need to modify their procedure to deink these types of recycled paper, which contain fine toner particles. In this study, the recyclability of electrophotographic printed paper has been evaluated extensively, or three repeats with an industrial standard. Meanwhile, recycled fiber from each repeat underwent printability analysis. Except the influence from papermaking method and pulp furnish, the strength of the recycled fiber slightly declines after each repeat because of fiber deterioration, which also affected the paper surface properties. However, the recycled fiber presented good printability on each recycling, especially on print density and fine details. It suggested that the electrophotographic substrate can tolerate a high recycled fiber content.

Effects on hand-sheet paper properties of pH in deinking process

Article

Jun 2022

In today’s world where natural resources are rapidly decreasing, recycling printed papers, and their use in paper production will reduce the environmental pollution caused by waste paper. Thus, energy savings can be achieved with less energy consumption. Although many methods are used in the deinking of printed papers, the effectiveness of these methods varies depending on many parameters, such as the type of paper to be de-inked, the type of printed ink in the printing system, and the chemicals used in deinking. In this study, the effect of pH in the deinking process was studied. Electrophotographic printed papers were used as the printed paper in this study, and the INGEDE method was applied as the deinking method. In this method, 3 different pH environments were prepared and an ink removal process was carried out in this environment. Optical and physical properties were determined by producing hand-sheet papers from the deinked pulp. In addition, test prints were made to determine the printability of the produced hand-sheet papers in the electrophotographic printing system.

Characterization of cementitious mortar with addition of fibers from waste paper

Article

Full-text available

Jun 2022

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.

Feasibility Analysis of Marble and Granite Waste as Partial Replacement of Natural Sand in Mortar Mix

Article

Dec 2022

1st-ICACEE-2022

Conference Paper

Full-text available

Oct 2022

Wajahat Ali

Recycling Paper Waste into Plaster Composite Mixture

Conference Paper

Full-text available

Feb 2022

ABSTRACT The sole purpose of this study is to recycle the paper wastes into plaster mortar that can be used for construction purposes, decoration pieces. The waste paper was collected from the block of an institution UET Taxila. Waste generation of the waste paper was calculated the paper waste was then characterized and the components present in the block was mainly A4 paper. This waste paper was generally collected to make plaster mortar. This was done by different methods that includes the mixing of cement, sand and waste paper by hand mixing and hand shredding, and machine mixing and machine shredding. Different blocks was formed by both methods and tests were performed that shows machine mixing and machine shredding method is better than manual shredding and mixing. The compressive strength of the waste paper plaster mortar was greater than that of the conventional mortar. Along with that, waste paper plaster mortar proves to be more cost efficient too. KEYWORDS: Paper waste, recycling need, waste management, plaster mortar by paper wastes, conventional plaster mortar.