Performance evaluation of reactive powder concrete with polypropylene fibers at elevated temperatures

Hiremath, Parameshwar; Yaragal, Subhash C.

doi:10.1016/j.conbuildmat.2018.03.020

Cited by 87 publications

(49 citation statements)

References 19 publications

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“…This gradual strength loss was perceived in both cooling systems. The consistent drop in strength values might be a consequence of the full melting of WMP fibre in addition to the gradual vaporisation of bound waters as a result of the dehydration and disintegration of C-S-H gels and decomposition of Ca(OH) 2 , which take place in concrete at temperatures more than 400 °C [22].…”

Section: Compressive Strength and Correlationsmentioning

confidence: 98%

“…The addition of short fibre is the most widely recognised technique to prevent concrete spalling at elevated temperatures [21,22]. The fibres can provide a significant contribution to concrete structures by prevention crack formation through their bridging action.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it was stated that the mechanical properties of concrete reduced with a rise in temperature. According to Hiremath and Yaragal [22], at high temperatures, polymeric based short fibres melt and their bed ways formed passages through which the moist vapour pressures and gasses built-up inside matrix as temperature upsurge are liberated. This liberation of the vapour and pore pressures considerably diminishes the spalling propensity of concrete components exposed to fire.…”

Section: Introductionmentioning

confidence: 99%

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Effect of elevated temperatures on properties of sustainable concrete composites incorporating waste metalized plastic fibres

et al. 2019

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The utilisation of industrial waste in the production of sustainable construction materials has attracted much attention recently due to the saving of vital places for landfills, low-cost of waste materials and also an improvement in the concrete properties. Exposing concrete structures to elevated temperatures causes progressive failure of the macro-and micro-structures of cement paste and, therefore, severe deterioration and damages in the load-bearing capacity. This study explored the effect of waste metalized plastic (WMP) fibres and palm oil fuel ash (POFA) on the performance of concrete exposed to high temperatures of 200, 400, 600 and 800 °C. Four concrete mixes comprising 0 and 0.5% WMP fibres, and 0 and 20% POFA content were cast. Properties studied include mass loss, compressive strength, and ultrasonic pulse velocity. The results showed that the adding of WMP fibre to the concrete mixes significantly improves the concrete performance at elevated temperatures with the lower rate of strength loss along with eliminating the explosive spalling behaviour as compared to those of plain concrete mixes. Furthermore, in comparing the results of compressive strength losses at a high temperature of 800 °C, strength losses were lower for specimens containing 0.5% WMP fibres than those of plain specimens. Moreover, green concrete decreases waste materials, the diminution of harmful impacts on the environment, and leads to sustainable and green cement and concrete industries. Keywords Concrete composites • High temperatures • Waste metalized plastic fibre • Palm oil fuel ash • Residual properties

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Section: Compressive Strength and Correlationsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of elevated temperatures on properties of sustainable concrete composites incorporating waste metalized plastic fibres

et al. 2019

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“…PP fibers play an important role in preventing spalling of the samples at elevated temperatures since they have a melting point at around 167 • C. The fibers melt after reaching this temperature, and provide escape channels for trapped vapors and reduce the vapor pressure [59]. Increasing the dosage of PP fibers to 1% exhibited a negative effect at elevated temperatures due to a larger number of pores created after the melting of a greater number of PP fibers, leading to an earlier failure as compared to the samples containing 0.5% PP fibers [71].…”

Section: Effect Of Fibersmentioning

confidence: 99%

Elevated Temperature Performance of Reactive Powder Concrete Containing Recycled Fine Aggregates

Salahuddin

Qureshi²,

Nawaz

et al. 2020

Materials

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This study examines the effect of elevated temperature on various properties of reactive powder concrete (RPC) containing varying percentages of recycled fine aggregates as sand replacement. Recycled fine aggregates were collected from two sources, i.e., demolished normal strength concrete and demolished RPC. The specimens were prepared using 25%, 50%, and 75% replacement of natural sand with recycled fine aggregates, exposed to two different curing conditions and were subjected to four temperatures, i.e., 25, 200, 400, and 600 °C. Later, the specimens were tested for mass loss, compressive strength test, split-tensile strength test, flexural strength test, and water absorption test at all temperature ranges. Results determined that although the mechanical properties degraded with the temperature rise, the recycled aggregates can be employed as a partial replacement of natural sand in RPC without causing a significant decrease in the performance of RPC, and can help to produce more sustainable RPC by using recycled aggregates.

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“…In order to modify the properties of concrete, the polypropylene fiber (PPF) could be added [17][18][19][20][21][22][23][24][25][26][27][28], and the PPF was found to be very effective in improving the crack resistance compared to other methods. The addition of PPF was found to decrease the workability [17] and increase the compressive strength [29][30][31][32], crack resistance [33][34][35], and durability [31,[36][37][38][39][40][41] given that the PPF was within an optimum content. The addition of fibers in concrete can also decrease the shrinkage and reduce the porosity [42,43].…”

Section: Introductionmentioning

confidence: 99%

Effects of Aggregate Micro Fines (AMF), Aluminum Sulfate and Polypropylene Fiber (PPF) on Properties of Machine-Made Sand Concrete

Wang

Wang³

2019

Applied Sciences

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With the depletion and increasing demand of river sand, machine-made sand could be used more and more in concrete. In order to improve the properties of machine-made sand concrete, the effects of the aggregate micro fines (AMF) content, aluminum sulfate, and polypropylene fibers (PPF) on the slump, compressive strength, water permeability, and the chloride permeability coefficients were investigated through a single factor test method, and related mechanisms were analyzed. The results show that the optimum contents of AMF, aluminum sulfate, and the polypropylene fiber are 10 wt%, 1 wt%, and 0.6 kg/m3, respectively. The optimum content of AMF improved the compactness of concrete. The addition of aluminum sulfate promoted the initial formation of ettringite, and thereby improved the compressive strength and the permeability resistance. The polypropylene fiber can modify the pore structure distribution of concrete and reduce the porosity, thereby improving the impermeability of the concrete. The compressive strength of the machine-made sand concrete could be increased by more than 20%, and the water/chloride permeability coefficients could be decreased by more than 45%.

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Performance evaluation of reactive powder concrete with polypropylene fibers at elevated temperatures

Cited by 87 publications

References 19 publications

Effect of elevated temperatures on properties of sustainable concrete composites incorporating waste metalized plastic fibres

Effect of elevated temperatures on properties of sustainable concrete composites incorporating waste metalized plastic fibres

Elevated Temperature Performance of Reactive Powder Concrete Containing Recycled Fine Aggregates

Effects of Aggregate Micro Fines (AMF), Aluminum Sulfate and Polypropylene Fiber (PPF) on Properties of Machine-Made Sand Concrete

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