Dynamic Fracture Toughness of Sandstone Masonry Beams Bound with Fiber-Reinforced Mortars

Islam, Md. Toihidul; Bindiganavile, Vivek

doi:10.1061/(asce)mt.1943-5533.0000704

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…Moreover, the flexural behavior of hydraulic lime mortar is more sensitive to strain rate than fiber-reinforced hydraulic lime mortar. Later, the bond behavior between the stone masonry block and the plain and fiber-reinforced hydraulic lime mortar was also investigated by Bindiganavile et al [17,18]. The results show that there was an improvement in the bond strength due to polypropylene microfibers (20 mm in length) but a difference in the fracture performance between the Portland cement-lime and hydraulic lime mortars.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Natural Hydraulic Lime Mortars

Garijo¹,

Zhang²,

Ruiz³

et al. 2019

Sustainable Construction and Building Materials

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Natural hydraulic lime (NHL) mortars are widely used for restoration works due to their good compatibility with the substrate material in terms of physical, chemical, and mechanical properties. Regarding their mechanical characterization, there is still a need for further understanding of their fracture behavior and the influence of their dosage methodology on the mechanical properties. Thus, this chapter focuses on the mechanical characterization of NHL mortars, such as flexural, compressive, and splitting tensile strengths, elastic modulus, and fracture energy. Moreover, the influence of the composition and production process on such properties was studied as well. Furthermore, the loading rate effect on the fracture behavior was also presented. The results show that NHL mortars have shape and size effect on the compressive strength. In addition, NHL mortar is rate sensitive, mainly due to the viscous effects caused by the presence of free water in the porous structure.

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Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Natural Hydraulic Lime Mortars

Garijo¹,

Zhang²,

Ruiz³

et al. 2019

Sustainable Construction and Building Materials

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“…For plain mortar, the results show that the DIF for the modulus of rupture was 12 at a strain rate of 10 s -1 , while it was 53 for fracture toughness. Moreover, Bindiganavile et al [7,8] studied the bond behaviour between the stone masonry block and the plain and fiberreinforced hydraulic lime mortar. They observed an improvement of the bond strength due to the polypropylene micro-fibers.…”

Section: Introductionmentioning

confidence: 99%

Influence of loading rate on the fracture behaviour of natural hydraulic and aerial lime mortars

Zhang¹

2019

Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Natural hydraulic and aerial lime mortars are used extensively for restoration works due to their good compatibility with the substrate material in historical masonry construction. Recently, the study of the influence of loading rate of such materials is getting more attention due to the fact that many historic masonry structures are situated in zones of seismic activity. However, the references are still scarce in comparison to that of steel and concrete and the studies focused on the measurement of the influence of loading rate on the fracture energy are limited, although it is an important parameter to characterize the ductility and the fracture behaviour of the material. Thus, in the paper, an aerial and a natural hydraulic lime mortar specimens were tested at various loading rates (loading-point displacement rates) from the quasi-static one, 5.0 × 10 -4 mm/s, to rate sensitive ones, 5.0 × 10 -1 mm/s and 1.6 × 10 1 mm/s. For this purpose, it was used a servo-hydraulic testing machine up to its maximum range of velocities. The results show that the fracture energy and the peak load of both lime mortars are rate sensitive. The maximum dynamic increase factors of the fracture energy are 1.9 for both mortars, while 1.4 and 1.6 for the natural hydraulic and the aerial lime mortars, respectively, in the peak load. This behaviour is related to viscous effects of free water in the mortar.

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