Abstract
Recycling is an important habit to avoid waste. This paper evaluates the performance of masonry mortar, elaborated by replacing natural sand with recycled fine aggregate (RFA) obtained from mortar. Five families of mixtures were prepared with different replacement proportions: 20%, 40%, 60%, and 100%. A 1:4 volumetric cement-to-aggregate ratio was used for all mixtures by experimentally adjusting the amount of water to achieve the same consistency of 175 ± 5 mm. The effects of the following procedures were analyzed: (1) the use of a deconstruction technique to collect the RFA, (2) pre-wetting of the aggregates, and (3) the use of a commercial plasticizer. Experimental results show that it is possible to use this type of recycled fine aggregate as a substitute for natural sand by up to 60% in the manufacture of masonry mortar without significantly affecting its properties.
Highlights
A guideline for developing new construction materials is to improve material performance, optimize supplies and reduce manufacturing costs
Using the construction and demolition waste (CDW) produced during the demolition of concrete structures as a substitute for thick and fine aggregates in masonry mortar mixtures reduces the amount of pollutant waste released to the environment, compensates for the lack of stone aggregates, and represents an innovation in the development of construction materials [1,2,3]
recycled fine aggregates (RFA) may be classified into two types: those obtained from concrete, and those obtained from other materials, such as mortar or ceramic
Summary
A guideline for developing new construction materials is to improve material performance, optimize supplies and reduce manufacturing costs. The amount of construction and demolition waste (CDW) has been increasing globally, becoming one of the main agents of environmental pollution. Using the CDW produced during the demolition of concrete structures as a substitute for thick and fine aggregates in masonry mortar mixtures reduces the amount of pollutant waste released to the environment, compensates for the lack of stone aggregates, and represents an innovation in the development of construction materials [1,2,3]. RFA may be classified into two types: those obtained from concrete, and those obtained from other materials, such as mortar or ceramic
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