The evolution of shrinkage strain of pet-mortar composite eco-materials

Abstract

Concretes and mortars are subjected to several kinds of shrinkage strains which represent the volumic variations resulting from the cement hydration and are governed by various physical and chemical aspects. The use of polyethylene terephthalate PET plastic wastes which are available in quantity and within low cost in our country yields a very important economic and environmental impact in the construction industry. Thus, we are interested to investigate the effect of PET volumetric additive amounts for cement substituting and for the behavior of the total, drying and autogenous shrinkage. Comparison study of obtained experimental results with codale prediction models were performed according to Eurocode 2 (EC2) in order to analyze the evolution of shrinkage strain with PET-mortar composite ages and for several rates of PET waste additions. According to obtained results, PET additions acts to reduce shrinkage strains of PET-mortar composites which promote the use of these modified mortar Eco-materials in the field of construction industry. Keywords

Study of the Effect of Plastic Aggregates on Drying Shrinkage and Expansion of Concrete

“…However, other phenomena such as concrete shrinkage were often the cause of cracking, loss of prestressing, redistribution of stresses, and even, more rarely, the collapse of the structure [10]. This dimensional variation depends on several parameters such as the composition of the concrete, the quality of its constituents, the size of the elements as well as the external storage conditions [10].…”

Structural Characteristics of Composite Mortars and their Evolution with PET Substitution Level for Several Specimens’ Ages

“…Considerable research and development work on plastic waste modification for cement mortar and concrete has been conducted in various countries. As a result, many effective plastic waste modification systems for cement mortar have been used in various applications in the construction industry for its many excellent properties (Latroch, 2018;Chaib, 2017;Ozbakkalogulu, 2016;Sharma, 2016;de Brito, 2013;Batayneh, 2007;Choi, 2005;Rebeiz, 1996). These researches generally investigate the effect of incorporating PET waste on the properties of concrete and cementitious mortar.…”