Fire response of Hybrid Fiber Reinforced Concrete to High Temperature

Novák, Josef; Kohoutková, Alena

doi:10.1016/j.proeng.2017.02.123

Cited by 54 publications

(9 citation statements)

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“…The heating time of the concrete specimens was chosen based on references [ 20 , 21 ] that used heated rates in the interval 1 °C/min to 10 °C/min, during 1 to 3 h at maximum temperature. In addition, the campaign carried out by Josef Novak [ 22 ] was considered. In this reference, the temperature was monitored externally and in the core of cubic specimens of 15 × 15 × 15 cm 3 by using thermocouples, showing that the heating times chosen were adequate.…”

Section: Experimental Program and Resultsmentioning

confidence: 99%

Influence of High Temperature on the Fracture Properties of Polyolefin Fibre Reinforced Concrete

2021

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Concrete has become the most common construction material, showing, among other advantages, good behaviour when subjected to high temperatures. Nevertheless, concrete is usually reinforced with elements of other materials such as steel in the form of rebars or fibres. Thus, the behaviour under high temperatures of these other materials can be critical for structural elements. In addition, concrete spalling occurs when concrete is subjected to high temperature due to internal pressures. Micro polypropylene fibres (PP) have shown to be effective for reducing such spalling, although this type of fibres barely improves any of the mechanical properties of the element. Hence, a combination of PP with steel rebars or fibres can be effective for the structural design of elements exposed to high temperatures. New polyolefin fibres (PF) have become an alternative to steel fibres. PF meet the requirements of the standards to consider the contributions of the fibres in the structural design. However, there is a lack of evidence about the behaviour of PF and elements made of polyolefin fibre reinforced concrete (PFRC) subjected to high temperatures. Given that these polymer fibres would be melt above 250 °C, the behaviour in the intermediate temperatures was assessed in this study. Uni-axial tests on individual fibres and three-point bending tests of PFRC specimens were performed. The results have shown that the residual load-bearing capacity of the material is gradually lost up to 200 °C, though the PFRC showed structural performance up to 185 °C.

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Section: Experimental Program and Resultsmentioning

confidence: 99%

Influence of High Temperature on the Fracture Properties of Polyolefin Fibre Reinforced Concrete

2021

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“…Fire resistance defined as the ability of building components to perform their intended load-bearing functions under fire exposure [11]. Hybrid fiber reinforced proportions with Alccofine satisfies the durability aspects such as resistance to water permeability, water absorption, acid attack and fire resistance [12].…”

Section: Ground Granulated Blast Furnace Slagmentioning

confidence: 99%

Effect of Alccofine and GGBS Addition on the Durability of Concrete

Balamuralikrishnan

Saravanan

2019

Civ Eng J

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Portland cement is the most important ingredient of concrete. A large scale production of cement plant consume large amount of energy and produce a number of undesirable products ( which negatively affect the environmental and depletion of natural resources. This treat to ecology has to lead to researchers to use industrial by-products as supplementary cementitious material in making concrete. In view this silica fume (SF), ground granulated blast furnace slag (GGBS), rice husk ash, fly ash (FL), metakolin, alccofine (AL), micro fine material, etc.; are tried out for replacing cement partially or fully in concrete, without compromising on its strength, also reduce greenhouse gases and sustainable way of management of waste. A new ultra-fine material emerged in market is called alccofine. This is available as a cementious material for replacing cement. Since this a new material, a study is tried out with the combination of Alccofine and GGBS. Ordinary Portland Cement 53 grade was used throughout the study and the grade of concrete is M20. Totally 108 cubes and 27 cylinder were cast and tested in the laboratory with nine different percentage combination of alccofine (A), GGBS (G) and cement (C) (C100, C70A0G30, C90A10G0, C60A10G30, C30A10G30, C40A0G60, C85A15G0, C55A15G30, C25A15G60). Each case 3 nos. of specimen were used for repeatability. It is intended to study the compressive strength, and its durability properties like acid attack test, sulphate attack test and rapid chloride permeability test (RCPT). Among the nine different combination the maximum compressive strength of concrete is achieved by using AL10% and GGBS 30% is 38.08 N/mm2. C60A10G30 is 28.76% higher than the control mix. Result shows that concrete incorporating alccofine and GGBS have higher compressive strength and alccofine enhanced the durability of concrete also.

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“…Single hook end steel fibres Dramix RC-80/60-BN with tensile strength 1225 MPa serve as reinforcement in the concrete composite. Whereas polypropylene fibres were added in concrete with an aim to reduce the risk of explosive concrete spalling which occurs at higher temperature at elevated temperature tests [11] [12]. …”

Section: Materials Propertiesmentioning

confidence: 99%