Load-deflection behaviour of concrete slab-type elements casted on stay-in-place TRC formwork

Kim, Hyeong-Yeol; Koh, Kyung-Taek; You, Young‐Jun; Ryu, Gum-Sung; Seo, Dong-Woo; Jin, Seung-Seop; Ahn, Gi-Hong; Nam, Jeong-Hee

doi:10.1016/j.compstruct.2020.112310

Cited by 29 publications

(22 citation statements)

References 31 publications

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“…TRC is composed of a matrix to maintain its shape with the textile reinforcement and to form the structural system. The most common textile reinforcement for the flexural strengthening of concrete structures is the two-dimensional grid shape textile [ 2 , 16 , 18 , 19 ]. In this study, the carbon textile grid (Q85/85-CCE-21, Solidian GmbH, Albstadt, Germany) shown in Figure 1 is employed.…”

Section: Experimental Programmentioning

confidence: 99%

“…Table 2 arranges the mix composition of mortar used in the TRC system. Apart from superplasticizer, this mix composition is identical to that used in a previous study [ 16 ]. Polyvinyl alcohol (PVA) fibers (KURALON K-II REC100L, Kuraray, Tokyo, Japan) are admixed at 1% fiber volume fraction in the matrix to prevent the occurrence of cracks induced by the drying shrinkage during the curing process following the fabrication of the TRC panel.…”

Section: Experimental Programmentioning

confidence: 99%

“…Polyvinyl alcohol (PVA) fibers (KURALON K-II REC100L, Kuraray, Tokyo, Japan) are admixed at 1% fiber volume fraction in the matrix to prevent the occurrence of cracks induced by the drying shrinkage during the curing process following the fabrication of the TRC panel. The purpose and process of the mix design of mortar for the TRC panel are explained in detail in a previous study [ 16 ]. The compressive strength of mortar measured at 28 days on cubic samples is 75.7 MPa.…”

Section: Experimental Programmentioning

confidence: 99%

“…For example, accelerated construction may be realized by using precast TRC panels. Recently, a research group in the Korea Institute of Civil Engineering and Building Technology (KICT) [ 16 ] fabricated precast TRC panels and proposed a method of applying stay-in-place formwork during the erection of an open-type wharf structure. More recently, the behavior of RC slab-type elements strengthened with a cast-in-place TRC system was experimentally investigated in KICT [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Strengthening of Concrete Element with Precast Textile Reinforced Concrete Panel and Grouting Material

et al. 2020

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Textile reinforced concrete (TRC) has widely been used for strengthening work for deteriorated reinforced concrete (RC) structures. The structural strengthening often requires accelerated construction with the aid of precast or prefabricated elements. This study presents an innovative method to strengthen an RC slab-type element in flexure using a precast panel made of carbon TRC. A total of five RC slabs were fabricated to examine the flexural strengthening effect. Two of them were strengthened with the precast panel and grouting material and another set of two slabs was additionally strengthened by tensile steel reinforcement. The full-scale slab specimens were tested by a three-point bending test and the test results were compared with the theoretical solutions. The results revealed that the ultimate load of the specimens strengthened with the TRC panel increased by at least 1.5 times compared to that of the unstrengthened specimen. The application of the precast TRC panel and grouting material for the strengthening of a prototype RC structure verified its outstanding constructability.

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Section: Experimental Programmentioning

confidence: 99%

Section: Experimental Programmentioning

confidence: 99%

Section: Experimental Programmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Strengthening of Concrete Element with Precast Textile Reinforced Concrete Panel and Grouting Material

et al. 2020

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“…In KICT, deteriorated concrete elements were strengthened with a cast-in-place TRM system [ 8 ] as well as a precast TRM panel [ 9 ]. Furthermore, a precast TRM panel was also used for stay-in-place permanent formwork for reinforced concrete elements [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Bonding and Tensile Strengths of Carbon Textile Reinforced Mortar

et al. 2020

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This paper deals with the long-term bonding and tensile strengths of textile reinforced mortar (TRM) exposed to harsh environments. The objective of this study was to investigate the long-term bonding and tensile strengths of carbon TRM by an accelerated aging method. Moisture, high temperature, and freezing–thaw cycles were considered to simulate harsh environmental conditions. Grid-type textiles were surface coated to improve the bond strength with the mortar matrix. A total of 130 TRM specimens for the bonding test were fabricated and conditioned for a prolonged time up to 180 days at varying moisture conditions and temperatures. The long-term bonding strength of TRM was evaluated by a series of bonding tests. On the other hand, a total of 96 TRM specimens were fabricated and conditioned at freezing–thaw conditions and elevated temperature. The long-term tensile strength of TRM was evaluated by a series of direct tensile tests. The results of the bonding test indicated that TRM was significantly degraded by moisture. On the other hand, the influence of the freezing–thaw conditions and high temperature on the tensile strength of the TRM was insignificant.

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