Abstract
Polyester polymer concretes can substitute conventional concretes based on their usually good mechanical strength, adequate physical properties, and high resistance against aggressive chemical environments. They also show a high potential for using recycled targets in their manufacturing. This paper analyzes the fresh and cured properties of polyester polymer concretes containing two metallurgical wastes, namely: ladle slag and alumina filler. Both targets require a higher resin dosage than sand. The standard consistency test showed a low representativeness of the recycled fresh mixes’ workability. The ladle slag and alumina filler samples showed a higher length plastic shrinkage than those containing sand. All of the targets obtained cured density values in the range of 1.589–1.912 g/cm3. From a mechanical point of view, the sand and alumina filler containing polyester polymer concretes reached 11.02 and 10.93 kN, respectively, of flexural strength, while the ladle slag samples showed the best result with 19.31 kN. In the compressive strength test, the sand and alumina filler combinations reached 106.16 and 104.21 MPa, respectively, while the ladle slag achieved 160.48 MPa. The flexural and compressive elasticity modulus showed similar trends related to the resin content.
Highlights
Polyester polymer concretes (PPCs) are composite materials made up of organic resins as a binder, and aggregates or fillers as the target materials
The higher resin content required for the ladle slags (LS) and alumina filler (AF) samples is probably related to the high content of these materials in the finest particles, which are 66.23% and
It is noticeable that sand requires a lower resin content, it showed a lower workability than LS and AF, which obtained very close consistencies. These results demonstrated that, as well as the resin dosage range, the fresh PPC consistency depends on the existence of a minimum content of finest particles, which strongly control the fresh mix rheology
Summary
Polyester polymer concretes (PPCs) are composite materials made up of organic resins as a binder, and aggregates or fillers as the target materials. These composite materials develop, by means of exothermic chemical reactions with hardeners and accelerators, a continuous resistant polymer matrix around the target particles. PPCs have been receiving increasing interest in recent years because of their good characteristics compared with traditional concrete, namely: improved mechanical strength, superior durability, good resistance to water, lower permeability, high chemical and corrosion resistances, excellent adhesion and a fast curing process, among others [1,2]. PPCs show some disadvantages, like a lower workability, fresh resin odor, lower resistance to high temperatures, and higher cost compared with conventional concrete [3].
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