Residual compressive strength of cement-based grouting material with early ages after fire

Li, Qingtao; Liu, Lujie; Huang, Zhaohui; Yuan, Guanglin

doi:10.1016/j.conbuildmat.2017.02.025

Cited by 20 publications

(26 citation statements)

References 8 publications

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“…For the specimen with 3 days curing age has had 25 days standing time after exposed high temperature. During that period un-hydrated cement continued to hydrate and the strength of the concrete has got considerable recovery [25]. However, for the specimen with 7 days curing age, the degree of strength recovery after exposed to high temperature is considerable less than the specimen with 3 days curing age [25].…”

Section: The Effect Of Curing Age On Bond Characteristics 431 Hysteresis Curvesmentioning

confidence: 98%

Bond behaviour between early age concrete and steel bar subjected to cyclic loading after fire

Yuan

Shu

et al. 2019

Fire Safety Journal

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This paper presents a comprehensive experimental study to investigate the bond behaviour between early age concrete and steel bar subjected to cyclic loading after fire. In this research, three temperatures of 150 o C, 350 o C, 550 o C and four curing ages of 3, 7, 14, 28 days were used. The effect of cooling methods on the bond behaviour has been evaluated. The influence of transverse stirrup on the bond characteristics has also been investigated. A total of 32 groups of specimens have been tested. In order to generate reliable test data, three identical specimens were tested for each group and average values were calculated. The research has generated a set of valuable test data for the fellow researchers who develop numerical models and practical structural engineers who evaluate the seismic performance and fire resistance of reinforced concrete structures after a fire happened during the construction stage.

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Section: The Effect Of Curing Age On Bond Characteristics 431 Hysteresis Curvesmentioning

confidence: 98%

Bond behaviour between early age concrete and steel bar subjected to cyclic loading after fire

Yuan

Shu

et al. 2019

Fire Safety Journal

Self Cite

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“…Therefore, the residual properties of concrete at an early age is very different from that concrete at an adequate age. [ 13,14 ] When the concrete was heated to a high temperature after 3 days and continued to be cured to the 28th day, most of its compressive strength could be recovered. The recovery of compressive strength of concrete cooled by water is more evident.…”

Section: Introductionmentioning

confidence: 99%

Influence of curing age on the mechanical properties of fly ash concrete exposed to elevated temperature

Yuan

et al. 2020

Structural Concrete

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The mechanical properties of early‐age fly ash (FA) concrete was experimentally studied. The splitting tensile strength and compressive strength under different curing ages, temperatures, cooling methods and FA contents were analyzed. The experimental results showed that the splitting tensile strength of concrete increased proportionally with temperature in the early stage and decreased as the temperature further increased. Compared to the concrete with FA content of 10% and 30%, the compressive strength of concrete with FA content of 20% was found to be highest at the age of 90d. The strength of the specimens under water cooling was comparatively lower than that under air cooling. The compressive strength of FA concrete heated to 150°C was greater than that of the unheated concrete. The compressive strength of FA concrete heated to 550°C was lower than that of concrete without treatment at high temperature. After high temperature exposure at the age of 90d, the compressive strength of the specimen was higher than that of the specimens at the ages of 7d, 14d and 28d. The microstructures of the specimens aged 90 days were measured by the SEM method before and after being exposed to high temperatures.

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“…Generally, the currently available grouting materials can be mainly divided into inorganic and organic grouting materials. The inorganic grouting material mainly includes cement [4,5], waterglass [6,7], and clay [8]. The organic grouting materials such as polyurethane [9,10,11], epoxy resin [12], acrylamide [13], methacrylate [14], acrylate [15], and lignin [16] have been extensively explored as well.…”

Section: Introductionmentioning

confidence: 99%

Polyurethane/Red Mud Composites with Flexibility, Stretchability, and Flame Retardancy for Grouting

et al. 2018

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Flexibility, stretchability, and flame retardancy are of ever increasing importance in constructing grouting materials. Herein, a simple and effective strategy to make organic-inorganic composite grouting material in a “flexible, stretchable, and flame retardant” way was based on the excellent synergistic interactions among polyurethane prepolymer, red mud, polyethylene glycol, and trimethylolpropane. The resultant polyurethane/red mud composite grouting material with three-dimensional network structure presented a favorable flexibility, desirable compressive strength of 29.2 MPa at 50% compression state, and a good elongation at 15.1%. The grouting material was mainly composed of amorphous polyurethane and crystalline red mud, and its probable formation mechanism was reaction of prepolymer with H2O, polyethylene glycol and trimethylolpropane under vigorous stirring in the presence of catalyst. Furthermore, the grouting material possessed favorable thermal stability, flame retardancy and repairment performance for roadway cracks. This work may open a simple and convenient avenue for the massive engineering application of red mud and preparation of flexible organic-inorganic hybrid grouting material.

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Residual compressive strength of cement-based grouting material with early ages after fire

Cited by 20 publications

References 8 publications

Bond behaviour between early age concrete and steel bar subjected to cyclic loading after fire

Bond behaviour between early age concrete and steel bar subjected to cyclic loading after fire

Influence of curing age on the mechanical properties of fly ash concrete exposed to elevated temperature

Polyurethane/Red Mud Composites with Flexibility, Stretchability, and Flame Retardancy for Grouting

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