Experimental Investigation on Enhancing the Strength of Porous Concrete by adding Polypropylene Fiber

Purpose This study aims to investigate the effect of high temperature (600°C) on the compressive strength of concrete covered with a mixture of polypropylene fiber and gypsum plaster (PFGP). Design/methodology/approach To study the compressive strength of concrete specimens exposed to temperature, 16 cubic specimens (size: 150 mm × 150 mm × 150 mm) were made. After 28 days of processing and gaining the required strength of specimens, first, polypropylene fiber was mixed with gypsum plaster (CaSO4.2H2O) and then the concrete specimens were covered with this mixture. To cover the concrete specimens with the PFGP, the used PFGP thickness was 15 mm or 25 mm. The polypropylene rates mixed with the gypsum plaster were 1, 3 and 5 per cent. A total of 14 specimens, 12 of which were covered with PFGP, were exposed to high temperature in two target times of 90 and 180 min. Findings The results show that the PFGP as covering materials can improve the compressive strength lost because of the heating of the concrete specimens. The results also show that the presence of polypropylene fiber in gypsum plaster has the effect on the compressive strength lost because of the heating of the PFGP-covered concrete. The cover of PFGP having 3 per cent polypropylene fiber had the best effect on remained strength of the specimens. Originality/value The cover of PFGP having 3 per cent polypropylene fiber has the best effect on remained strength of the PFGP covered specimens exposed to temperature.

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Experimental investigation on the mechanical behavior of hybrid steel-polypropylene fiber reinforced concrete under conventional triaxial cyclic compression

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.123262 ◽

2021 ◽

Vol 291 ◽

pp. 123262

Author(s):

Kuan Meng ◽

Lihua Xu ◽

Yin Chi

Keyword(s):

Experimental Investigation ◽

Reinforced Concrete ◽

Mechanical Behavior ◽

Polypropylene Fiber ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced ◽

Cyclic Compression ◽

Polypropylene Fiber Reinforced Concrete

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Effect of Addition Polypropylene Fiber on Compressive Strength and Permeability Values in Porous Concrete

MEDIA KOMUNIKASI TEKNIK SIPIL ◽

10.14710/mkts.v27i1.31536 ◽

2021 ◽

Vol 27 (1) ◽

pp. 135-142

Author(s):

Wira Rante Paganggi ◽

Amelia Makmur ◽

Rachmansyah Rachmansyah

Keyword(s):

Compressive Strength ◽

Polypropylene Fiber ◽

Polypropylene Fibers ◽

Chemical Additives ◽

Chemical Additive ◽

Porous Concrete ◽

Concrete Mixtures ◽

Catchment Areas ◽

Water Catchment ◽

Reduced Water

The infrastructure growth has an impact on reducing green areas, which will be followed by reduced water catchment areas. Porous concrete is one of the porous materials that can be used on a pedestrian walk, which is able to drain water. The porous concrete has a limitation strength. This research aims to determine the effect of using various content of chemical additive and polypropylene fibers for porous concrete mixtures related to the compressive strength and permeability values. This experimental method referring to ACI 522R-10 Standard. That specimens using chemical additives and variations of polypropylene fibers: 0.05%, 0.1%, 0.15%, 0.2%, and 0.25% by weight of cement. The results showed that the specimen which had the highest compressive strength was 16.9 MPa, which was added 0.25% polypropylene fiber. The addition of polypropylene fibers increases the compressive strength value by 5.6%. Based on the compressive strength and permeability graphs, it can be estimated that the optimal content of polypropylene fiber is 0.17% by weight of cement.

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Experimental Investigation of Mechanical Behaviors of Fiber-Reinforced Fly Ash-Soil Mixture

Advances in Materials Science and Engineering ◽

10.1155/2019/1050536 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10

Author(s):

Lihua Li ◽

Jiang Zhang ◽

Henglin Xiao ◽

Zhi Hu ◽

Zhijie Wang

Keyword(s):

Mechanical Properties ◽

Experimental Investigation ◽

Fly Ash ◽

Polypropylene Fiber ◽

Ash Content ◽

Reinforced Soil ◽

Fiber Reinforced ◽

Compression Tests ◽

Unconfined Compression ◽

Direct Shear Tests

In recent years, applications of different types of solid waste in fiber-reinforced soil are developed to improve the strength of soil. This study presents an experimental investigation of mechanical properties of polypropylene fiber-reinforced fly ash-soil mixtures. A series of direct shear tests and unconfined compression tests were carried out. The effects of fly ash content and fiber content on compaction characteristics, shear strength, strength parameters, and unconfined compressive strength of the reinforced soil are investigated and discussed. Results reveal that when the fly ash content of the specimen exceeds 20% and the curing period exceeds 14 days, specimens become more brittle in the unconfined compression tests. It can be deduced that 30% fly ash and 1% fiber provide the optimum content, and the inclusion of fiber reinforcement has positive benefits on the mechanical properties of the reinforced soil to a certain extent.

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