scholarly journals Mechanical and Physical Properties of Polyester Polymer Concrete Using Recycled Aggregates from Concrete Sleepers

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Francisco Carrión ◽  
Laura Montalbán ◽  
Julia I. Real ◽  
Teresa Real
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Physical Properties ◽  
Polyester Resin ◽  
Mechanical Performance ◽  
Unsaturated Polyester ◽  
Recycled Aggregates ◽  
Polymer Concrete ◽  
Recycling Process ◽  
Mechanical And Physical Properties

Currently, reuse of solid waste from disused infrastructures is an important environmental issue to study. In this research, polymer concrete was developed by mixing orthophthalic unsaturated polyester resin, artificial microfillers (calcium carbonate), and waste aggregates (basalt and limestone) coming from the recycling process of concrete sleepers. The variation of the mechanical and physical properties of the polymer concrete (compressive strength, flexural strength, modulus of elasticity, density, and water absorption) was analyzed based on the modification of different variables: nature of the recycled aggregates, resin contents (11 wt%, 12 wt%, and 13 wt%), and particle-size distributions of microfillers used. The results show the influence of these variables on mechanical performance of polymer concrete. Compressive and flexural strength of recycled polymer concrete were improved by increasing amount of polyester resin and by optimizing the particle-size distribution of the microfillers. Besides, the results show the feasibility of developing a polymer concrete with excellent mechanical behavior.

scholarly journals Polypropylene Fibers as Reinforcements of Polyester-Based Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Gonzalo Martínez-Barrera ◽  
Enrique Vigueras Santiago ◽  
Susana Hernández López ◽  
Osman Gencel ◽  
Fernando Ureña-Nuñez
Keyword(s):  
Particle Size ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Polypropylene Fiber ◽  
Polymer Concrete ◽  
Polypropylene Fibers ◽  
Compressive Properties ◽  
Fiber Concentration ◽  
Medium Particle ◽  
Medium Particle Size

Effects of gamma radiation and the polypropylene fibers on compressive properties of polymer concrete composites (PC) were studied. The PCs had a composition of 30 wt% of unsaturated polyester resin and 70 wt% of marble particles which have three different sizes (small, medium, and large). The PCs were submitted to 200, 250, and 300 kGy of radiation doses. The results show that the compressive properties depend on the combination of the polypropylene fiber concentration and the applied radiation dose. The compressive strength value is highest when using medium particle size, 0.1 vol% of polypropylene fibers and 250 kGy of dose; moreover, the compressive modulus decreases when increasing the particle size.

Concrete + polyester + CaCO3: Mechanics and morphology after gamma irradiation

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Gonzalo Martínez-Barrera ◽  
Manuel Eduardo Espinosa-Pesqueira ◽  
Witold Brostow
Keyword(s):  
Compressive Strength ◽  
Calcium Carbonate ◽  
Polyester Resin ◽  
Mechanical Performance ◽  
Unsaturated Polyester ◽  
Compressive Strain ◽  
Compressive Modulus ◽  
Polymer Concrete ◽  
Concrete Materials ◽  
Periodical Change

AbstractWe have studied effects of gamma radiation on mechanical performance of polymer concrete (PC) containing varying concentrations of an unsaturated polyester resin and calcium carbonate. The compressive strength values increase from the zero dose (non-irradiated PC) to 10 kGy; afterwards we find a periodical change as a function of the resin concentration. The highest compressive strength corresponds to the highest resin concentration but the changes are not too large. Compressive strain values also go symbiotically with the resin concentration. All our composites - including irradiated and non-irradiated - have higher strength values than those reported for earlier polyester + concrete materials. The compressive modulus values follow the same pattern as the compressive strength and strain.

scholarly journals Waste Materials from Tetra Pak Packages as Reinforcement of Polymer Concrete

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Miguel Martínez-López ◽  
Gonzalo Martínez-Barrera ◽  
Carlos Barrera-Díaz ◽  
Fernando Ureña-Núñez ◽  
Witold Brostow
Keyword(s):  
Flexural Strength ◽  
Gamma Rays ◽  
Modulus Of Elasticity ◽  
Particle Concentration ◽  
Polyester Resin ◽  
Raw Materials ◽  
Unsaturated Polyester ◽  
Silica Sand ◽  
Polymer Concrete ◽  
Tetra Pak

Different concentrations (from 1 to 6 wt%) and sizes (0.85, 1.40, and 2.36 mm) of waste Tetra Pak particles replaced partially silica sand in polymer concrete. As is well known, Tetra Pak packages are made up of three raw materials: cellulose (75%), low density polyethylene (20%), and aluminum (5%). The polymer concrete specimens were elaborated with unsaturated polyester resin (20%) and silica sand (80%) and irradiated by using gamma rays at 100 and 200 kGy. The obtained results have shown that compressive and flexural strength and modulus of elasticity decrease gradually, when either Tetra Pak particle concentration or particle size is increased, as regularly occurs in composite materials. Nevertheless, improvements of 14% on both compressive strength and flexural strength as well as 5% for modulus of elasticity were obtained when polymer concrete is irradiated.

Effect of Cyclic Exposure of Chemicals on Compressive Strength of Polyester Resin Based Polymer Concrete

2013 ◽  
Vol 687 ◽  
pp. 185-190 ◽  
Author(s):  
Masoud Jamshidi ◽  
Mohammad Javad Ghasemi ◽  
Abdolreza Hashemi
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Concrete Structures ◽  
Polymer Concrete ◽  
Acid Solutions ◽  
Gas Oil ◽  
Demineralized Water ◽  
Concrete Production

Polymer concretes (PC) were introduced to building and construction industry more than 50 years ago. Gradually, they became a suitable substitute for concrete structures. Their superior properties againt aggresives introduced them as a good overlay for concrete structures; however, their application was shortly diminished due to the higher costs. In this research a homemade cost-quality effective resin (unsaturated polyester) is used as binder in the polymer concrete production. Polymer concrete specimens were evaluated for compressive strength and its fluctuation due to cyclic exposure to different aggresive solutions (sulfuric acid, nitric acid, citric acid, chloridric acid, sodum sulfate, water, demineralized water, sodium hydroxid, potasium hydroxid and gas oil). It was found that PC specimens degraded more in alkali conditioned in comparison to acid solutions.

scholarly journals Effect of Water on Some Mechanical Properties for Sawdust and Chopped Reeds /UPE composites

2011 ◽  
Vol 8 (2) ◽  
pp. 551-560
Author(s):  
Baghdad Science Journal
Keyword(s):  
Mechanical Properties ◽  
Weight Gain ◽  
Flexural Strength ◽  
Young’S Modulus ◽  
Polyester Resin ◽  
Young's Modulus ◽  
Unsaturated Polyester ◽  
Molding Method ◽  
Effect Of Water ◽  
Composite Samples

In this study, composite materials were prepared using unsaturated polyester resin as binder with two types of fillers (sawdust and chopped reeds). The molding method is used to prepare sheets of UPE / sawdust composite and UPE / chopped reeds composite. The mechanical properties were studied including flexural strength and Young's modulus for the samples at normal conditions (N.C). The Commercial wood, UPE and its composite samples were immersed in water for about 30 days to find the weight gain (Mt%) of water for the samples, also to find the effect of water on their flexural strength and Young's modulus. The results showed that the samples of UPE / chopped reeds composite gained highest values of flexural strength (24.5 MPa) and Young's modulus (5.1 GPa) as compared with other composites at (N.C). The results showed that the wet samples of sawdust composite have lowest values of weight gain (Mt %) of water (0.043%) as compared with other composites after immersion. Also it’s showed a slight decrease in values of Young's modulus for all the samples after immersion as compared with the samples at (N.C). Finally it’s showed a slight decrease in values of flexural strength for all the samples except for the composite material formed from UPE / chopped reeds which showed an increase in the value of flexural strength after immersion, where the wet samples of UPE / chopped reeds composite gained (29 MPa) as compared with the samples at (N.C).

Mechanical and physical properties of kenaf fiber mat reinforced unsaturated polyester composites with the presence of graphene as nano filler

2019 ◽  
Author(s):  
A. S. E. Mustapha ◽  
M. B. Abu Bakar ◽  
M. N. Masri ◽  
M. A. Sulaiman ◽  
M. H. Mohd Amini ◽  
...  
Keyword(s):  
Physical Properties ◽  
Unsaturated Polyester ◽  
Kenaf Fiber ◽  
Mechanical And Physical Properties ◽  
Polyester Composites
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