Thermal resistance of fly ash based rubberized geopolymer concrete

Luhar, Salmabanu; Chaudhary, Sandeep; Luhar, Ismail

doi:10.1016/j.jobe.2018.05.025

Cited by 142 publications

(66 citation statements)

References 40 publications

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“…To conduct the thermal insulation test, the prepared specimens were grouped on an electric furnace (see Figure 7c) for heating (see Figure 7a), using the same power (700 W). The insulating cotton (see Figure 7a) used for heat preservation in this test was glass cotton wrap felt, and its safe-use temperature was −120 • C~400 • C. In order to ensure safety, the temperature required for this test did not exceed 400 • C. Therefore, the power of the electric furnace was adjusted to about 700 W. Moreover, Salmabanu Luhar et al [30] investigated the thermal resistance of fly ash-based rubberized geopolymer concrete and treated the specimens at a maximum of 800 • C demonstrating that the rubberized concrete obtained by mixing rubber particles into plain concrete can withstand high temperature. Therefore, the thermal insulation test in this study was relatively safe.…”

Section: Thermal Insulation Test Of Rubberized Concretementioning

confidence: 99%

“…Although reusing waste tires for concrete production has negative effects on concrete properties such as lower compressive strength and splitting tensile strength, recycled tire rubber is a promising material in the construction industry due to its favorable lightweight, elasticity, energy absorption, sound, and heat insulating properties. In view of this, it has potential for applications in circumstances where strict crack resistance and higher flexibility but moderate or lower compressive strength (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) are required, such as the base layer of pavement, face slab of a rock-filled dam, and impervious barriers of reservoirs [11,12]. Therefore, the research and application of rubberized concrete has bright prospects, which can bring high economic value and environmental benefits.…”

Section: Introductionmentioning

confidence: 99%

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An Experimental Study on Mechanical and Thermal Insulation Properties of Rubberized Concrete Including Its Microstructure

Guo

Huang

et al. 2019

Applied Sciences

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This study aimed to investigate the effects of the size and weight content of waste rubber particles on the relevant performances of rubberized concrete. First, the fine aggregates were partially replaced by rubber particles of different sizes to produce rubberized concrete. Secondly, the mechanical and thermal insulation properties of rubberized concrete were investigated. Finally, microstructural analyses of rubberized concrete including scanning electronic microscope (SEM) and energy distribution spectroscopy (EDS) were examined. Experimental results indicated that uniaxial compressive strength of rubberized concrete was reduced, while the peak strain was gradually increased and thermal insulation properties were improved with the increase of rubber content or decrease of rubber particle size. In addition, rubber particles affected the failure modes, endowing concrete with weak brittleness and strong cracking resistance. Additionally, it was observed that the interfacial adhesion between the matrix rubber and the aggregates was weak under SEM, which seemed to be a key factor that reduced the strength of rubberized concrete.

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Section: Thermal Insulation Test Of Rubberized Concretementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Mechanical and Thermal Insulation Properties of Rubberized Concrete Including Its Microstructure

Guo

Huang

et al. 2019

Applied Sciences

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“…The first technical attempt has been made by Luhar et al [8] with rubberized FA-based GC. In this study, GC has been developed using rubber tire waste as a replacement to river sand and reported a competent solution to disposal problems to both FA and rubber waste [9]. The in-depth establishment and broader adoption required before applying in architectural developments and for the implementation of standard codes [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Characteristic Evaluation of Geopolymer Concrete for the Development of Road Network: Sustainable Infrastructure

Bellum

Muniraj

Madduru³

2020

Innov. Infrastruct. Solut.

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A large quantity of the rural roads in the world has been connected with all traditional concrete roads and has a low volume of traffic. The common problem for such kinds of roads is sustainability and durability. Geopolymer concrete (GC) roads offer an alternate to the traditional cement-based concrete roads. An acceleratory pavement track (APT) with six segments has been constructed to evaluate the practical approaches of fly ash-ground granulated blast furnace slag (GGBFS)-based GC in the sustainable development of rural road network. This paper presents the non-destructive testing (NDT) on APT to check the quality of GC. Moreover, the mechanical, microstructural, and durability characteristics have been analyzed on samples prepared at the time of APT construction. In this paper, efforts have been made to elaborate on the corrosion resistance and chloride resistance of GC after 28 days of ambient curing. The highest compressive strength of 56.63 MPa was obtained for mix with 70% FA, 30% GGBFS, and 0.4 S/B ratio sample after 28 days of ambient curing, and this value is strengthened by rebound hammer result, i.e., 55.7 MPa, conducted on APT without load revolution. The increase in the number of load repetitions on APT found a decrease in rebound and ultrasonic pulse velocity values. Geopolymer concrete mix with 30% GGBFS attained superior NDT behavior upon load repetitions on APT, and similar improved characteristics were identified on laboratory-based testing.

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“…Geopolymer is inorganic polymer which has good mechanical properties, excellent fire and heat resistant and able to stand on strong chemical attacks [5][6][7][8]. Geopolymers can be synthesized from pure aluminosilicate minerals such as kaolinite and clays or industrial waste such as fly ash, furnace slag and red mud [9,10].…”

Section: Introductionmentioning

confidence: 99%

On The Physico-Mechanics, Thermal and Microstructure Properties of Hybrid Composite Epoxy-Geopolymer for Geothermal Pipe Application

Firawati

2017

MATEC Web Conf.

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Abstract. The objective of this study is to determine the effect of epoxy resin on the physico-mechanics, thermal and microstructure properties of geopolymers hybrid composites for geothermal pipe application. Hybrid composite epoxy-geopolymers pipes were produced through alkali activation method of class-C fly ash and epoxy resin. The mass of epoxyresin was varied relative to the mass of fly ash namely 0% (SPG01), 5% (SPG02), 10% (SPG03), 15% (SPG04), and 20% (SPG05). The resulting materials were stored in open air for 28 days before conducting any measurements. The densities of the product composites were measured before and after the samples immersed in boiling water for 3 hours. The mechanical strength of the resulting geothermal pipes was measured by using splitting tensile measurement. The thermal properties of the pipes were measured by means of thermal conductivity measurement, differential scanning calorimetry (DSC) and fire resistance measurements. The chemical resistance was measured by immersing the samples into 1M H 2 SO 4 solution for 4 days. The microstructure properties of the resulting materials were examined by using x-ray diffraction (XRD) and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS). The results of this study showed that hybrid composite epoxy-geopolymers SPG02 and SPG03 are suitable to be applied as geothermal pipes.

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Thermal resistance of fly ash based rubberized geopolymer concrete

Cited by 142 publications

References 40 publications

An Experimental Study on Mechanical and Thermal Insulation Properties of Rubberized Concrete Including Its Microstructure

An Experimental Study on Mechanical and Thermal Insulation Properties of Rubberized Concrete Including Its Microstructure

Characteristic Evaluation of Geopolymer Concrete for the Development of Road Network: Sustainable Infrastructure

On The Physico-Mechanics, Thermal and Microstructure Properties of Hybrid Composite Epoxy-Geopolymer for Geothermal Pipe Application

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