Abstract
Paper as a material needs a lot of input energy. Many measures have been suggested to recycle paper, but still a huge amount of it ends in landfills. Hereby, one possibility for recycling paper - making paper plaster and putting it into service in indoor environment - is introduced. The study focuses on the moisture buffering properties of paper plaster. Two questions are under consideration in this article. Firstly, how paper type and production method influence the properties (dry density, drying shrinkage) of paper plaster, and secondly, what the material moisture buffering properties of paper plaster are. The plasters for testing were made from four types of paper (printer paper, glossy paper, newsprint and book paper). The production methods used were rumpling, grinding with a shredder or special crusher (prepared for the study) and soaking the paper after that. The dry density of groups varied from approx. 240 kg/m3 to 400 kg/m3. The shrinkage properties were from 3% to 10% in diameter. To evaluate the moisture buffering ability of paper plaster, the methodology introduced in the Nordtest protocol was used. Paper plaster is an outstanding water vapour buffering material [MBV=2.23-3.91 g/(m2·%RH)] belonging to the moisture buffering class "excellent" defined by Rode [15]. From the production methods rumpling gave the best value while printer paper showed the best values from the chosen materials. The tests with glossy paper resulted in modest values. To conclude, all the paper materials and preparation methods introduced in this study can be used to make paper plaster
Highlights
Paper production is a huge branch of industry, and paper recycling and reuse is an area of industry as well
The specimens moulded in a cylinder (a 110 mm plastic pipe with the inside diameter of 103 mm and 25 mm high) were grouped as follows and left to dry (Fig.3): rumpled printer paper – group 1 (PPR); rumpled book paper – 2 (BPR); shredded printer paper – 3 (PPS); shredded book paper (Fig. 2b) - 4 (BPS); rumpled glossy paper – 5 (GPR); printer paper grinded with a crusher (Fig. 1, 2a ) – 6 (PPC); glossy paper grinded with a crusher -7 (GPC); book paper grinded with a crusher – 8 (BPC); newsprint grinded with a crusher - 9 (NPC); shredded glossy paper -10 (GPS)
It can be concluded that glossy paper had the highest density while book and printer paper were quite similar
Summary
Paper production is a huge branch of industry, and paper recycling and reuse is an area of industry as well. Paper could be recycled several times as paper or carton [1]. A remarkable amount of paper is just burned for heat production [2]. In building material industry paper is used in many ways for example in cellulose insulation [3] and gypsum boards [2]. One way of recycling paper, which is not very commonly used, is making paper plaster [4,5,6]. Plaster made from paper can be used as an indoor finishing material and here a question arises why paper should be considered from that point of view
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
