Influence of Long Polypropylene Fibre on the Properties of Concrete

Concrete is the most used building and construction material globally due to the ease of availability and durability. It is a well-known fact that concrete can easily withstand compressive stresses; however, it fails under tension. To improve this deficiency, steel bar reinforcement has been used. However, with the steel reinforcement, additional permanent self-weight is transferred on the structure and is prone to corrosion. Hence, engineers and researchers have been working to search for more sustainable reinforcing material that could be cost-effective and simultaneously increase tensile strength. This experimental work was carried out to study the influence of long (38.1 mm) polypropylene (PP) fibres on the workability and mechanical strengths (compressive and flexural) of concrete. Three different fibre fraction content, 0.20%, 0.25% and 0.30% were selected to reinforce concrete. A total of 12 cylinders of 300mm×150mm dimension (3 cylinders per mix) and 12 beams of 609.6mm×304.8mm×101.6mm dimension (3 beams per mix) were used to determine the compressive strength and flexural strength after the samples achieved 28 days curing. Based on the results, it can be observed that longer fibres do not significantly influence the compressive strength as much as they do on flexural strength. Furthermore, longer length fibres, like shorter fibres, obstruct the workability of concrete. Comparing with previous findings, it can be concluded that for patching of macrocracks, longer length PP fibres should be used.

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Development of Nanocement Mortar as a Construction Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.795.684 ◽

2013 ◽

Vol 795 ◽

pp. 684-691 ◽

Cited By ~ 5

Author(s):

Wail N. Al-Rifaie ◽

Omar Mohanad Mahdi ◽

Waleed Khalil Ahmed

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Cement Mortar ◽

Construction Material ◽

Modulus Of Rupture ◽

Early Stages

The present research examined the compressive and flexural strength of nanocement mortar by using micro cement, micro sand, nanosilica and nanoclay in developing a nanocement mortar which can lead to improvements in ferrocement construction. The measured results demonstrate the increase in compressive and flexural strength of mortars at early stages of hardening. In addition, the influence of heating on compressive strength of cement mortar. General expressions to predict the compressive strength, modulus of rupture for the developed nanocement mortar in the present work are proposed.

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Influence of Glass Fibers on Mechanical Properties of Concrete with Recycled Coarse Aggregates

Civil Engineering Journal ◽

10.28991/cej-2019-03091307 ◽

2019 ◽

Vol 5 (5) ◽

pp. 1007-1019 ◽

Cited By ~ 14

Author(s):

Babar Ali ◽

Liaqat Ali Qureshi ◽

Ali Raza ◽

Muhammad Asad Nawaz ◽

Safi Ur Rehman ◽

...

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Mechanical Performance ◽

Volume Fraction ◽

Glass Fibers ◽

Construction Material ◽

Concrete Compressive Strength ◽

Coarse Aggregates ◽

Highly Sensitive

Despite plain cement concrete presenting inferior performance in tension and adverse environmental impacts, it is the most widely used construction material in the world. Consumption of fibers and recycled coarse aggregates (RCA) can add ductility and sustainability to concrete. In this research, two mix series (100%NCA, and 100%RCA) were prepared using four different dosages of GF (0%GF, 0.25%GF, 0.5%GF, and 0.75%GF by volume fraction). Mechanical properties namely compressive strength, splitting tensile strength, and flexural strength of each concrete mixture was evaluated at the age of 28 days. The results of testing indicated that the addition of GF was very useful in enhancing the split tensile and flexural strength of both RCA and NCA concrete. Compressive strength was not highly sensitive to the addition of GF. The loss in strength that occurred due to the incorporation of RCA was reduced to a large extent upon the inclusion of GF. GF caused significant improvements in the split tensile and flexural strength of RCA concrete. Optimum dosage of GF was determined to be 0.25% for NCA, and 0.5% for RCA concrete respectively, based on the results of combined mechanical performance (MP).

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Experimental Study on HMPE Fiber Reinforced Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.598.336 ◽

2012 ◽

Vol 598 ◽

pp. 336-340

Author(s):

Hisen Hua Lee ◽

Yen Shuo Chen ◽

Chi Wen Cheng

Keyword(s):

Compressive Strength ◽

Reinforced Concrete ◽

Experimental Testing ◽

Low Cost ◽

Construction Material ◽

Volume Ratio ◽

Fiber Material ◽

Reinforce Concrete ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced

Abstract. Concrete as a most popular construction material has many advantages such as easiness to be formed into various shapes, common availability and relative low cost. However, the low tensile strength and brittleness are disadvantages for wider application of the material. In this study, an advanced material of high strength and strong abrasion resistance HMPE fiber was used to reinforce concrete properties. A series of experimental testing were carried out to examine the properties of both fresh and hardened HMPE fiber reinforced concrete. It was found that the addition of an HMPE fiber material in concrete may enhance its compressive strength as high as 20% increment without water-reducing admixture. If a water-reducing admixture was applied, the increment of compressive strength may reach as high as 25% for 1.5% volume ratio of fiber contained in concrete.

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Influence of Fibre Length on the Behaviour of Polypropylene Fibre Reinforced Cement Concrete

Civil Engineering Journal ◽

10.28991/cej-03091144 ◽

2018 ◽

Vol 4 (9) ◽

pp. 2124-2131 ◽

Cited By ~ 5

Author(s):

Imtiaz Ahmed Memon ◽

Ashfaque Ahmed Jhatial ◽

Samiullah Sohu ◽

Muhammad Tahir Lakhiar ◽

Zahid Hussain Khaskheli

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Control Sample ◽

Fibre Length ◽

Reinforce Concrete ◽

Polypropylene Fibre ◽

Cement Concrete ◽

Reinforced Cement ◽

Increased Strength ◽

Vast Range

Concrete being a mixture of cement, aggregates (fine and coarse) and water, can be used in vast range of applications. It has excellent durability and availability which are its main advantages. Though, concrete is strong in compression it is comparatively weak in tensile loading. Over the years various materials have been used to reinforce concrete to withstand the tensile stresses. Polypropylene fibre is one such fibre which comes in varied sizes, is nowadays being utilized to reinforce concrete. In this study, three PP fibres were used at 0.20%, 0.25% and 0.30% content by weight. The flexural and compressive strengths were determined. Based on the results, it was observed with increase in size of fibre the compressive strength decreased significantly though it was still higher than the controlled sample. The length of PP fibres had significant effect on the compressive strength and flexural strength of concrete. Short PP fibres showed relatively higher compressive strength but lower flexural strength when higher fibre content is used, while long PP fibres achieved lower compressive strength but higher flexural strength than shorter PP fibres. The optimum dosage for both PP fibre sizes was 0.25% at which it achieved increased strength as compared to control sample.

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Optimalisasi Kuat Tekan dan Kuat Lentur Beton Menggunakan Campuran Lateks

Jurnal Manajemen Teknologi & Teknik Sipil ◽

10.30737/jurmateks.v4i2.2064 ◽

2021 ◽

Vol 4 (2) ◽

pp. 159

Author(s):

Ary Prastowo ◽

Ahmad Ridwan ◽

Edy Gardjito ◽

Zendy Bima Mahardana

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Construction Material ◽

Building Construction ◽

Adhesive Properties ◽

Concrete Mixtures ◽

A Value ◽

Concrete Production ◽

Concrete Quality

Concrete is a building construction material that has an important role. Concrete itself tends to have strong properties in resisting compressive forces, but weak in resisting tensile or flexural forces. The use of additives in concrete is an option to improve the basic properties of concrete. Latex or rubber latex is one of the natural materials that can be used in concrete mixtures. Its adhesive properties can be utilized in improving the quality of concrete. This study aims to determine the compressive strength and flexural strength of concrete with the addition of latex. The research was conducted experimentally by making concrete specimens in the laboratory. The addition of latex by 10% and 30% with a planned concrete quality of fc' 29.5 MPa. The test object used is a cylinder measuring 15x30 cm and a beam measuring 15x15x30 cm. The tests carried out were testing the compressive strength and flexural strength at the age of 28 days. The results showed that the highest compressive strength was at the addition of 10% latex with a value of 9.96 MPa. While the highest flexural strength value obtained was 3.20 Mpa at the addition of 10% Latex or. From these results it can be seen that the addition of latex has not been able to improve the quality of concrete and has not been able to increase the compressive strength or flexural strength of concrete. So that these results can be used as research development or concrete production.

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Performance of Foundry Sand Concrete under Ambient and Elevated Temperatures

Materials ◽

10.3390/ma12162645 ◽

2019 ◽

Vol 12 (16) ◽

pp. 2645 ◽

Cited By ~ 4

Author(s):

Hazrat Bilal ◽

Muhammad Yaqub ◽

Sardar Kashif Ur Rehman ◽

Muhammad Abid ◽

Rayed Alyousef ◽

...

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Natural Resources ◽

Elevated Temperatures ◽

Construction Material ◽

Pulse Velocity ◽

Sustainable Construction ◽

Air Cooling ◽

Natural Sand ◽

Foundry Sand

Waste foundry sand (WFS) is the by-product of the foundry industry. Utilizing it in the construction industry will protect the environment and its natural resources, and enable sustainable construction. WFS was employed in this research as a fractional substitution of natural sand by 0%, 10%, 20%, 30%, and 40% in concrete. Several tests, including workability, compressive strength (CS), splitting tensile strength (STS), and flexural strength (FS), ultrasonic pulse velocity (USPV), Schmidt rebound hammer number (RHN), and residual compressive strengths (RCS) tests were performed to understand the behavior of concrete before and after exposure to elevated temperatures. Test findings showed that the strength characteristics were increased by including WFS at all the phases. For a substitute rate of 30%, the maximum compressive, splitting tensile, and flexural strength were observed. Replacement with WFS enhanced the 28-day compressive, splitting tensile, and flexural strength by 7.82%, 9.87%, and 10.35%, respectively at a 30% replacement level, and showed continuous improvement until the age of 91 days. The RCS of foundry sand concrete after one month of air cooling at ambient temperature after exposing to 300 °C, 400 °C, 500 °C, 600 °C, 700 °C, and 800 °C was found to be in the range of 67.50% to 71.00%, 57.50% to 61.50%, 49.00% to 51.50%, 38% to 41%, 31% to 35% and 26% to 31.5% of unheated compressive strength values for 0% to 40% replacement of WFS, respectively. The RCS decreases with increasing temperature; however, with increasing WFS, the RCS was enhanced in comparison to the control samples. In addition, the replacement of 30% yielded excellent outcomes. Hence, this study provides a sustainable construction material that will preserve the Earth’s natural resources and provide a best use of WFS.

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Assessment of the Suitability of Paper Waste as an Engineering Material

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.485 ◽

2014 ◽

Vol 4 (6) ◽

pp. 724-727 ◽

Cited By ~ 2

Author(s):

O. M. Okeyinka ◽

O. J. Idowu

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Health Risks ◽

Environmental Sustainability ◽

Laboratory Experiments ◽

Research Work ◽

Cost Effective ◽

Waste Paper ◽

Engineering Material ◽

Potential Applicability

This research work investigates the potential applicability of waste paper in the production of ceiling boards with focus on achieving: environmental sustainability, safe disposal of waste paper and more cost effective production of materials. The main view was to provide an alternative to the conventional asbestos ceiling boards that are costly and also pose health risks. Three mix designs were formulated and used for the casting (1:1, 1:1.5 and 1:2), varying in regards of the weight of the waste paper components. CaCO3 was added to the mix as an additive as well as starch bond glue to aid binding. Laboratory experiments were conducted to determine the properties and suitability of the produced boards. Properties such as water absorption, abrasion, compressive strength, flexural strength and ultimate loads were considered for comparison. The boards with 1:1 mix ratio displayed the best results of the test properties hence, its mechanized manufacturing was recommended.

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Mechanical properties of papercrete

MATEC Web of Conferences ◽

10.1051/matecconf/201816202016 ◽

2018 ◽

Vol 162 ◽

pp. 02016 ◽

Cited By ~ 2

Author(s):

Harith Zaki ◽

Iqbal Gorgis ◽

Shakir Salih

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Flexural Strength ◽

Low Cost ◽

Construction Material ◽

Splitting Tensile Strength ◽

Waste Paper ◽

Additional Material ◽

Sustainable Building

This paper studies the uses, of waste paper as an additional material in concrete mixes. Papercrete is a term as the name seems, to imply a mixture of paper and concrete. It is a new, composite material using waste paper, as a partial addition of Portland cement, and is a sustainable, building material due to, reduced amount of waste paper being put to use. It gains, latent strength due to presence of hydrogen bonds in microstructure of paper. Papercrete has been, reported to be a low cost alternative, building construction, material and has, good sound absorption, and thermal insulation; to be a lightweight and fire-resistant material. The percent of waste paper used (after treating) namely (5%, 10%, 15% and 20%) by weight of cement to explore the mechanical properties of the mixes (compressive strength, splitting tensile strength, flexural strength, density), as compared with references mixes, it was found that fresh properties affected significantly by increasing the waste paper content. The compressive strength, splitting tensile strength, flexural strength and density got decreased with increase in the percentage of paper.

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The Influence of Nano-SiO2 and Recycled Polypropylene Plastic Content on Physical, Mechanical, and Shrinkage Properties of Mortar

Advances in Civil Engineering ◽

10.1155/2019/6960216 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12 ◽

Cited By ~ 3

Author(s):

Haiming Chen ◽

Yangchen Xu ◽

Donglei Zhang ◽

Lingxia Huang ◽

Yuntao Zhu ◽

...

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Water Absorption ◽

Construction Material ◽

Autogenous Shrinkage ◽

Physical And Mechanical Properties ◽

Plastic Waste ◽

Partial Replacement ◽

Interfacial Zone

This work is aimed to study the possibility of recycling plastic waste (polypropylene (PP)) as aggregate instead of sand in the manufacturing of mortar or concrete. For this, an experimental study was carried out to evaluate the influence of nano-SiO2 and recycled PP plastic particles' content on physical, mechanical, and shrinkage properties and microstructure of the mortars with recycled PP plastic particles. The sand is substituted with the recycled PP plastic particles at dosages (0%, 20%, 40%, and 60% by volume of the sand). The nano-SiO2 content is 5% by weight of cement. The physical (porosity, water absorption, and density), mechanical (compressive and flexural strength) and shrinkage properties of the mortars were evaluated, and a complementary study on microstructure of the interface between cementitious matrix and PP plastic particles was made. The measurements of physical and mechanical properties showed that PP-filled mortar had lower density and better toughness (higher ratio of flexural strength to compressive strength). However, the compressive strength and flexural strength of PP-filled mortar is reduced, and the porosity, water absorption, autogenous shrinkage, and dry shrinkage increased as compared to normal cement mortar. The addition of nano-SiO2 reduced the porosity, water absorption, and drying shrinkage of PP-filled mortar and effectively improved the mechanical properties, but increased its autogenous shrinkage. A microscopic study of the interfacial zone (plastic-binder) has shown that there is poor adhesion between PP plastic particles and cement paste. From this work, it is found that recycled PP plastic waste has a great potential to be a construction material. It can be used as partial replacement of natural aggregates instead.

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Characteristics of Waste Iron Powder as a Fine Filler in a High-Calcium Fly Ash Geopolymer

Materials ◽

10.3390/ma14102515 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2515

Author(s):

Toon Nongnuang ◽

Peerapong Jitsangiam ◽

Ubolluk Rattanasak ◽

Weerachart Tangchirapat ◽

Teewara Suwan ◽

...

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Flexural Strength ◽

Iron Powder ◽

Construction Material ◽

Setting Time ◽

Bottom Ash ◽

Curing Process ◽

Heat Curing ◽

High Calcium

Geopolymer (GP) has been applied as an environmentally-friendly construction material in recent years. Many pozzolanic wastes, such as fly ash (FA) and bottom ash, are commonly used as source materials for synthesizing geopolymer. Nonetheless, many non-pozzolanic wastes are often applied in the field of civil engineering, including waste iron powder (WIP). WIPs are massively produced as by-products from iron and steel industries, and the production rate increases every year. As an iron-based material, WIP has properties of heat induction and restoration, which can enhance the heat curing process of GP. Therefore, this study aimed to utilize WIP in high-calcium FA geopolymer to develop a new type of geopolymer and examine its properties compared to the conventional geopolymer. Scanning electron microscopy and X-ray diffraction were performed on the geopolymers. Mechanical properties, including compressive strength and flexural strength, were also determined. In addition, setting time and temperature monitoring during the heat curing process were carried out. The results indicated that the addition of WIP in FA geopolymer decreased the compressive strength, owing to the formation of tetrahydroxoferrate (II) sodium or Na2[Fe(OH)4]. However, a significant increase in the flexural strength of GP with WIP addition was detected. A flexural strength of 8.5 MPa was achieved by a 28-day sample with 20% of WIP addition, nearly three times higher than that of control.

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