The high temperature resistance of a para-aramid fibre-reinforced concrete composite

Ko, D.; áková,; áchová,; Polozhiy, Kirill; Vejmelková, Eva; Keppert, Martin; erný,

doi:10.2495/hpsm140181

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…Basic physical and mechanical properties and their changes after three hours temperature loading were investigated by using conventional mortar specimens of size 40 x 40 x 160 mm 3 . It was experimentally verified that the appropriate combination of aluminous cement with metakaolin additive and natural crushed basalt aggregates ensure sufficient properties for practical utilization.…”

Section: Discussionmentioning

confidence: 99%

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Impact of metakaolin additive on residual mechanical properties of cement based composites loaded by high temperature

Reiterman¹,

Holčapek²,

Jogl³

et al. 2015

Computational Methods and Experimental Measurements XVII

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The aim of this paper is to describe the influence of the composition of refractory composites on their response to gradual thermal loading. Aluminous cement binder system was modified by metakaolin additive which is produced by calcination and grinding of natural clay. Studied aluminous additive is often used for production of high strength composites with increased mechanical and durability properties. The fundamental problem of these composites is their brittle rupture which is why studied composites were reinforced by very short ceramic fibers.Studied aluminate binder system in combination with natural basalt fine aggregates ensures sufficient resistance to high temperature exposure. The influence of composition changes was evaluated by the results of physical and mechanical testing -compressive and flexural strength and bulk density were determined on the different levels of temperature loading. Application of ceramic fibers brought an expected linear increase of mechanical parameters of studied composites just up to dose of 4% by volume. Metakaolin replacement showed the optimal dose just about 20% of aluminous cement weight.The extensive application of cement supplementary materials has an important motivation because of high energy consumption of aluminous cement based refractory composites. It was experimentally verified that the appropriate combination of aluminous cement with metakaolin additive and natural crushed basalt aggregates ensure sufficient properties for practical utilization of proposed composites.

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Section: Discussionmentioning

confidence: 99%

“…Sudden escaping of steam is often the reason of surface spalling of HPC described in several studies and practical experiences [1,2]. The behavior of concrete surface layer of highperformance concrete with special consideration to spalling was described in [3].…”

Section: Introductionmentioning

confidence: 99%

Impact of metakaolin additive on residual mechanical properties of cement based composites loaded by high temperature

Reiterman¹,

Holčapek²,

Jogl³

et al. 2015

Computational Methods and Experimental Measurements XVII

View full text Add to dashboard Cite

show abstract

“…Due to the different specific surface of used cements (CEM 52.5 R has higher specific surface) the workability of these mixtures were different while maintaining the water to cement ratio. According to previous research the optimal combination of two length of basalt fibers were chosen [8,9].…”

Section: Provided Experimentsmentioning

confidence: 99%

Comparison of Refractory and Non-Refractory Components in Cement Composites after High Temperatures Load

Holčapek

Reiterman

Jogl

et al. 2014

AMR

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This article shows results of experimental program focused on determination of refractory and non-refractory components for cement composites and those influence on final properties. According to several research works from various universities strength and cohesion in general of common concrete rapidly decrease with temperature higher than 600 °C. To determine the difference between fire-resistance and common components four mixtures were designed. Non-refractory crushed nature silica aggregates and Portland cement compared to high alumina cement Secar®71 with crushed nature basalt aggregates were used. Combination of basalt fibers with two different lengths significantly improves. Basic mechanical properties tensile characteristics such as tensile strength in bending and compressive strength were examined on samples 40 x 40 x 160 mm. Exposure to 600 °C and especially 1000 °C in electric furnace for three hours simulated the high temperature load. Compared to silica aggregates together with Portland cement, where after1000 °C the composite is disintegrated with almost zero strength, the refractory components show considerably better parameters.

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The high temperature resistance of a para-aramid fibre-reinforced concrete composite

Cited by 2 publications

References 7 publications

Impact of metakaolin additive on residual mechanical properties of cement based composites loaded by high temperature

Impact of metakaolin additive on residual mechanical properties of cement based composites loaded by high temperature

Comparison of Refractory and Non-Refractory Components in Cement Composites after High Temperatures Load

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