An Investigation on Mechanical Properties and Damping Behaviour of Hardened Mortar with Rubber Tire Crumbs (RTC)

Abstract

Masonry wall has been used for ages as a part of non-engineered building structures, due to its ease of manufacture, strength, and stiffness to support gravity loads, but brittle enough to resist earthquake shake. One solution to increase its ductility when the earthquake shake stroked, ductile materials at bed joints that binding the masonries may apply. Mortar is a composite material consisting of sands, cement, and water that is generally used for masonry construction as a binder at bed joints. On the other hand, rubber has been used to isolate vibration of machinery because of its good damping behaviours. Those materials will be mixed and be elaborated to provide a ductile mortar binder at bed joints. This research aims to investigate the mechanical properties and the damping behaviour of hardened mortar with rubber tire crumbs at proportions of 0%, 40%, and 60%. Three types of specimens in forms of mortar cubes of 50x50x50 mm3, tensile specimens and mortar beams of 100x100x500 mm3 were tested to provide strength and damping behaviour. The addition of rubber tire crumbs in the mortar decreased the compressive strength, tensile strength, flexural strength and unit weight. Despite its weakness in the mechanical strengths, the addition of rubber tire crumbs could increase the damping behaviour significantly. This research recommended that mortar containing RTC is still appropriate use for non-structural component although it has low mechanical properties.

Compressive Strength and Tensile Bond Strength of Rubber Tire Crumb Mortar Mixed with Fly Ash

“…The decrease in the compressive strength of the mortar is caused by the weak bond between the RTC and the cement paste. The higher the RTC content, the more voids there are between the rubber and the cement paste, so that the compressive strength of the mortar decreases [6,23,24].…”

“…The addition of RTC to mortar or concrete also provides many benefits, such as increasing ductility and damping, as well as making the mortar/concrete lighter. However, weaknesses were also found, where the addition of RTC to the mortar mixture resulted in a decrease in the mechanical properties of the mortar, such as compressive strength, tensile strength, and flexural strength [6][7][8]. As a result of this decrease in strength, rubber tire mortar is not recommended for use as a structural material that must withstand large axial forces [9].…”

Physical and mechanical properties of synthetic beams from high density polyethylene waste

“…Structural columns and beams will bear the loads on them, so they must have a compressive strength of at least 17 MPa [13]. Meanwhile, the structural elements of the building must also have the ability to withstand earthquake forces with adequate ductility [14][15]. To determine the ability of a synthetic beam as a column, it is necessary to examine its strength to withstand axial forces or known as compressive strength, while as a beam, it is necessary to examine its flexural strength (Fig.…”

Designing Cement Mortars Modified with Cork and Rubber Waste Using Theory of the Experiment

“…Among the applications, the most common statement is that rubber waste reduces the strength parameters of concretes and mortars [4][5][6][7][8][9][10][11]. Nahla Naji Hilal stated that the formation of mechanical features of composites depends on the degree of substitution and the size of waste particles.…”

“…The mortar modified in this way may still be an alternative to the mortars used in non-structural elements, for obtaining light heat-protective mortars or other building elements, such as partition walls, road barriers, sidewalks etc., for which there is a great demand in the building industry [14]. Low fire resistance disqualifies this type of mortar from the indoor applications, but can be successfully used for external plastering, because they have good thermal and acoustic properties and are impermeable [7]. The mortars containing cork waste can find similar applications in construction.…”