Experimental research on explosion resistance of masonry structures reinforced with modified polyurea elastomer

Tao, Xigui; Jia, Yifan; Fan, Chen

doi:10.1088/1757-899x/711/1/012012

Cited by 1 publication

(1 citation statement)

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“…It was found that the wall reinforced by fiber-reinforced polymer and a polyurea coating can maintain better integrity and can coat the wall fragments and debris in the structure to reduce debris splash. Further study showed that the blast mitigation effect when both side walls were polyurea-coated was better than that of a single polyurea-coated side wall [ 5 , 6 ], and for the one-sided coating wall, coating polyurea on the interior face of walls can better cover the wall debris after explosion than the blast-facing side, and with the increase in the thickness of polyurea coating, the blast mitigation effect of the wall was significantly enhanced [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Explosion Test and Numerical Simulation of Coated Reinforced Concrete Slab Based on BLAST Mitigation Polyurea Coating Performance

et al. 2022

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The mechanical strength, thermal stability, thermal performance, and microstructure of Qtech T26 blast mitigation polyurea (T26 polyurea) were studied using quasi-static and dynamic mechanical experiments, thermogravimetric experiments, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) experiments, and contact explosion and non-contact explosion experiments with polyurea-coated reinforced concrete slabs. Additionally, the energy dissipation mechanism of the coating was analyzed. The blast mitigation ability and blast mitigation mechanism of T26 polyurea-coated reinforced concrete slabs were investigated by analyzing the macroscopic morphology of reinforced concrete slabs with or without coatings and the contact explosion simulation of polyurea-coated reinforced concrete slabs. The results showed that T26 polyurea exhibited a certain strain rate effect. Its initial thermal decomposition temperature reached 286 °C, and its thermal stability was good. After carbonization, carbon slag can form and adhere to the structural surface. The glass transition temperature Tgs of the soft segment was −44.9 °C, and the glass transition temperature Tgh of the hard segment was 36.5 °C, showing a certain amount of microphase separation morphology. After the explosion test, there was a small pit on the front surface of the coated reinforced concrete plate, and there was no damage on the back surface. The integrity of the plate was good. The uncoated reinforced concrete slab had a large crater on the front of the explosion surface, and the back of the explosion surface experienced explosion collapse, concrete crushing, and an overall loss of stability. The numerical simulation results showed that the failure mode of the coated plate was consistent with the test. The kinetic energy conversion rate of the uncoated reinforced concrete plate was 87.27%, and the kinetic energy conversion rate of the coated reinforced concrete plate was 95.36%. The T26 coating improved the kinetic energy conversion rate of the structure and improved the blast mitigation ability of the reinforced concrete plate structure.

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Section: Introductionmentioning

confidence: 99%