Mechanical Properties of Concrete Modified with Silica Fume and Integral Waterproof and Comparison with Waste Glass Aggregate Concrete

Abstract This study includes the effect of using different dosages of integral waterproof Admixture and silica fume on some mechanical properties of concrete. Concrete improved by using different ratios of integral water proof admixture(IWP admixture) to increase strength and durability, this admixture used as percentages from cement weight in each mix ranged from 0.0% to 2% ( 0.0, 1.0%, 1.2%,1.4%,1.6%,1.8%, and 2%), compressive strength test done for cubes with (10*10*10) cm for each mix. The flexural strength test was done by (10*10*40) cm beams and tested after 28 days of curing. comparison study was made between silica fume mixes properties and mixes without silica fume. Adding IWP admixture leads to increase mechanical properties of ordinary concrete, the reference mix shows compressive strength equal to 26.38 MPa, while mixes with 2% IWP gives 38.8 MPa in this study. The study also includes the effect of using 2 main dosages of silica fume to the mixes that contain IWP, the new concrete with two admixtures show better values of compressive, tensile and flexural strength comparing with mixes with only IWP, the compressive strength increased from 38.8 MPa for ordinary IWP mixes to 52.3 MPa for 10% silica fume concrete mixes, and also the flexural strength increased from 4.8 MPa for mixes with only IWP to 7.3 MPa for mixes modified with 10 % silica fume. Study include also using waste glass as fine aggregate in mixes contain IWP and 10% silica fume and that show more increment in mechanical properties also.

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Evaluation of Interlocking Brick

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.37895 ◽

2021 ◽

Vol 9 (8) ◽

pp. 3002-3008

Author(s):

C. Mounika

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Flexural Strength ◽

Crumb Rubber ◽

Strength Test ◽

Fine Aggregate ◽

Coir Fiber ◽

Split Tensile Strength ◽

Rubber Tire

Abstract: The main aim of this project is to evaluate mechanical properties of interlocking bricks using coir fiber powder as a substitute of cement and rubber tire waste as a substitute of fine aggregate (sand) with varying percentages of 0%, 1%, 2% & 3% and 0%, 5%, 10% & 15% in concrete and to help in solving environmental problem produced from disposing of waste tires and coir husk partially. Additionally fly ash was also added with varying percentages of 5%, 10% and 15% as a substitute to cement in a concrete mix. Several laboratory tests such as compressive strength test, flexural strength test, split tensile strength test, water absorption test and density of concrete etc., were conducted on hardened concrete specimen to achieve the optimum usage of crumb rubber tire waste and coir fiber powder in mix proportion of concrete. It is found that the maximum compressive strength value of coir fiber based crumb rubber interlocking brick was obtained at 1%CF + 5%FA + 5%CR, flexural strength value and split tensile strength value of coir fiber based crumb rubber concrete block was obtained at 1%CF + 5%FA + 5%CR. From the final conclusion or outcome of the project, optimum usage of coir fiber powder is 3% and crumb rubber is 5%. Keywords: coir fiber powder, crumb rubber tire waste, mechanical properties, interlocking bricks & optimum usage.

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Effect of Silica Fume and Polyvinyl Alcohol Fiber on Mechanical Properties and Frost Resistance of Concrete

Buildings ◽

10.3390/buildings12010047 ◽

2022 ◽

Vol 12 (1) ◽

pp. 47

Author(s):

Yan Tan ◽

Ziling Xu ◽

Zeli Liu ◽

Jiuhong Jiang

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Elastic Modulus ◽

Flexural Strength ◽

Polyvinyl Alcohol ◽

Silica Fume ◽

Frost Resistance ◽

Strength Test ◽

Freeze Thaw ◽

Polyvinyl Alcohol Fiber

To improve the mechanical properties and frost resistance of concrete, silica fume, and polyvinyl alcohol fiber compounded in concrete. The mechanical and frost resistance of concrete were comprehensively analyzed and evaluated for strength change, mass loss, and relative dynamic elastic modulus change by compressive strength test, flexural strength test, and rapid freeze-thaw test. The results showed that with the incorporation of silica fume and polyvinyl alcohol fiber, the compressive and flexural strengths of concrete were improved, and the decrease in mass loss rate and relative dynamic elastic modulus of concrete after freeze-thaw cycles were significantly reduced, which indicated that the compounding of silica fume and polyvinyl alcohol fiber improved the frost resistance of concrete. When the content of silica fume was 10% and the volume content of polyvinyl alcohol fiber was 1%, the comprehensive mechanical performance and frost resistance of concrete is the best. The compressive strength increased by 26.6% and flexural strength increased by 29.17% compared to ordinary concrete. Based on the test data, to study the macroscopic damage evolution of concrete compound silica fume and polyvinyl alcohol fiber under repeated freeze-thaw conditions. The Weibull distribution probability model and GM (1, 1) model were established. The average relative errors between the predicted and actual data of the two models are small and very close. It is shown that both models can reflect well the development of concrete damage under a freeze-thaw environment. This provides an important reference value and theoretical basis for the durability evaluation and life prediction of compound silica fume and polyvinyl alcohol fiber concrete in cold regions.

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Mechanical Properties and Microstructural Features using Stone Dust as a Partial Replacement of Sand

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f9070.088619 ◽

2019 ◽

Vol 8 (6) ◽

pp. 5232-5237

Keyword(s):

Mechanical Properties ◽

Economic Growth ◽

Sustainable Development ◽

Compressive Strength ◽

Flexural Strength ◽

Natural Resources ◽

Strength Test ◽

Partial Replacement ◽

Test Results ◽

Stone Dust

Today’s world is always leads to development in technology as well as the economic growth though sometime these will affect the environment badly. That’s why world environmental commission coined the termed called sustainable development where development takes place without hampering the others’ needs. Concrete industry is rapidly growing industry in India which consumes lots of natural resources during the production of concrete. Here Stone dust is used as a sustainable material in place of sand partially. M25 grade of concrete has been chosen for the experiments. Different mechanical properties of concrete like compressive strength, Split tensile, flexural strength etc. and Microstructural features like SEM, EDX have been included in this study. Compressive Strength and flexural strength test results shown the increase in the strength. Sulphate Resistance Properties have been tested by curing the cubes in the MgSO4 solution and increase in weight has been observed. Similarities are found in the SEM pictures

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Strength Characteristics of High Strength Concrete (HSC) with and without Coarse Aggregate

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.b5131.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 4701-4704

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Fly Ash ◽

Flexural Strength ◽

Silica Fume ◽

High Strength Concrete ◽

Mechanical Characteristics ◽

Coarse Aggregate ◽

High Strength ◽

Set Up

This paper aimed to investigate the mechanical characteristics of HSC of M60 concrete adding 25% of fly ash to cement and sand and percentage variations of silica fumes 0%,5% and 10% to cement with varying sizes of 10mm,6mm,2mm and powder of granite aggregate with w/c of 0.32. Specimens are tested for compressive strength using 10cm X 10cmX10cm cubes for 7,14,28 days flexural strength was determined by using 10cmX10cmX50cm beam specimens at 28 days and 15cm diameter and 30cm height cylinder specimens at 28 days using super plasticizers of conplast 430 as a water reducing agent. In this paper the experimental set up is made to study the mechanical properties of HSC with and without coarse aggregate with varying sizes as 10mm, 6mm, 2mm and powder. Similarly, the effect of silica fume on HSC by varying its percentages as 0%, 5% and 10% in the mix studied. For all mixes 25% extra fly ash has been added for cement and sand.

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Prediction Models for the Mechanical Properties of Self-Compacting Concrete with Recycled Rubber and Silica Fume

Materials ◽

10.3390/ma13081821 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1821 ◽

Cited By ~ 4

Author(s):

Robert Bušić ◽

Mirta Benšić ◽

Ivana Miličević ◽

Kristina Strukar

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Silica Fume ◽

Prediction Models ◽

Crumb Rubber ◽

Fine Aggregate ◽

Rubberized Concrete ◽

Self Compacting Concrete ◽

Recycled Rubber ◽

European Standards

The paper aims to investigate the influence of waste tire rubber and silica fume on the fresh and hardened properties of self-compacting concrete (SCC) and to design multivariate regression models for the prediction of the mechanical properties of self-compacting rubberized concrete (SCRC). For this purpose, 21 concrete mixtures were designed. Crumb rubber derived from end-of-life tires (grain size 0.5–3.5 mm) was replaced fine aggregate by 0%, 5%, 10%, 15%, 20%, 25%, and 30% of total aggregate volume. Silica fume was replaced cement by 0%, 5%, and 10% of the total cement mass. The optimal replacement level of both materials was investigated in relation to the values of the fresh properties and mechanical properties of self-compacting concrete. Tests on fresh and hardened self-compacting concrete were performed according to the relevant European standards. Furthermore, models for predicting the values of the compressive strength, modulus of elasticity, and flexural strength of SCRC were designed and verified with the experimental results of 12 other studies. According to the obtained results, mixtures with up to 15% of recycled rubber and 5% of silica fume, with 28 days compressive strength above 30 MPa, were found to be optimal mixtures for the potential future investigation of reinforced self-compacting rubberized concrete structural elements.

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Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar

Materials ◽

10.3390/ma13143189 ◽

2020 ◽

Vol 13 (14) ◽

pp. 3189 ◽

Cited By ~ 6

Author(s):

Marcin Małek ◽

Waldemar Łasica ◽

Mateusz Jackowski ◽

Marta Kadela

Keyword(s):

Mechanical Properties ◽

Waste Glass ◽

Fine Aggregate ◽

Low Carbon ◽

Glass Cullet ◽

Split Tensile Strength ◽

Glass Waste ◽

Aggregate Content ◽

Glass Aggregate ◽

Glass Sand

A responsible approach towards sustainable development requires the use of environmentally friendly, low-carbon, and energy-intensive materials. One positive way is to use glass waste as a replacement for fine natural aggregate. For this purpose, the effects of adding glass cullet to the mechanical properties of mortar were carried out. The glass aggregate made from recycled post-consumer waste glass (food, medicine, and cosmetics packaging, including mostly bottles), were used. This experimental work included four different contents of fine glass cullet (5, 10, 15, and 20 wt.% of fine aggregate). The compressive, flexural, and split tensile strengths were evaluated. Moreover, the modulus of elasticity and Poisson coefficient were determined. The addition of glass sand aggregate increases the mechanical properties of mortar. When comparing the strength, the obtained improvement in split tensile strength was the least affected. The obtained effect for the increased analysed properties of the glass sand aggregate content has been rarely reported. Moreover, it was determined that by increasing the recycled glass sand aggregate content, the density of mortar decreased. In addition, the relationships between the properties for mortar containing glass sand aggregate were observed.

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PERANCANGAN ALAT UJI TARIK MORTAR MENGGUNAKAN TENAGA PENGGERAK MOTOR LISTRIK

Jurnal Poli-Teknologi ◽

10.32722/pt.v17i1.1098 ◽

2018 ◽

Vol 17 (1) ◽

Author(s):

Sarito Sarito ◽

Muhtarom Riyadi ◽

Handi Sudardja

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Flexural Strength ◽

Building Material ◽

Civil Engineering ◽

Strength Test ◽

Fine Aggregate ◽

Trial Period ◽

Tensile Strength Test ◽

Engineering State

ABSTRACTMechanic characteristics of hard mortar are: compressive strength, flexural strength, tensile strength, and adhesion power. In the meantime, at Building Material Laboratory of Civil Engineering, State Polytechnic of Jakarta, test of tensile strength and adhesion power of mortar cannot be conducted because of the absence of the test equipment.This research aims to provide electric motor-powered equipment for tensile strength test of mortar in order to complete the equipment at Building Material Laboratory of Civil Engineering, State Polytechnic of Jakarta. The particular aim of the research is to make prototype of mortar tensile strength test equipment.In this research a prototype of motor-powered mortar tensile strength test equipment and the specimens, to test the performance of the equipment, were prepared. By examining the obstacles and shortcomings, this equipment is a development of the previous research by Muhtarom Riyadi and the team, 2015. The specimens, as the sample to test the equipment, were prepared by the ratio of one part of cement and three part of fine aggregate, with the total number of the specimens of 50 pieces.By analyzing the result of observation in trial period, the equipment could function as it should be. The magnitude of maximum tensile strength that causes the mortar specimens to break depends on the quality, age, and tensile area of mortar, which magnitude can be observed in manometer or scale with the unit of kilogram.Keywords: equipment, tensile, mortar, electric motorABSTRAKSifat mekanis mortar keras antara lain kuat tekan, kuat lentur, kuat tarik dan daya lekat. Sementara ini di Laboratorium bahan bangunan Jurusan Teknik Sipil Politeknik Negeri Jakarta untuk uji kuat tarik dan daya lekat mortar belum bisa dilaksanakan karena belum adanya peralatan untuk melakukan pengujian.Penelitian ini bertujuan untuk membuat alat uji tarik mortar menggunakan tenaga penggerak motor listrik guna melengkapi peralatan yang diperlukan di Laboratorium bahan bangunan Jurusan Teknik Sipil Politeknik Negeri Jakarta. Target khusus yang ingin dicapai adalah membuat prototype alat uji tarik mortar.Dalam penelitian ini akan dibuat prototipe alat uji tarik mortar menggunakan tenaga motor listrik dan cetakan benda ujinya, sekaligus untuk menguji kinerjanya. Alat ini merupakan pengembangan oleh peneliti yang terdahulu Muhtarom Riyadi dan anggotanya, 2015), dengan mencermati kendala dan kekurangannya maka penelitian ini merupakan penyempurnaan penelitian sebelumnya Sebagai sampelnya dibuat benda uji tarik mortar dengan perbandingan 1 bagian semen berbanding 3 bagian pasir, sedangkan jumlah benda uji dibuat sebanyak 50 buah.Hasil pengamatan selama uji coba maka alat alat uji tarik mortar menggunakan tenaga penggerak motor listrik dapat berfungsi sebagaimana mestinya. Besarnya gaya tarik maksimum yang menjadikan benda uji tarik mortar putus tergantung dari mutu mortar, umur serta luas penampang tarik yang nilainya dapat diamatai pada manometer atau timbangan berat dengan satuan kilogramKata kunci : Alat, uji, tarik, mortar, motor listrik

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Fresh, Mechanical Properties and Impact Resistance Behavior of Eco-Friend Self-Compacted Concrete

Al-Nahrain Journal for Engineering Sciences ◽

10.29194/njes.22030208 ◽

2019 ◽

Vol 22 (3) ◽

pp. 208-212

Author(s):

Sheelan M. Hama ◽

Alhareth M. Abdulghafor ◽

Mohammed Tarrad Nawar

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Polyethylene Terephthalate ◽

Glass Powder ◽

Impact Resistance ◽

Waste Glass ◽

Slump Flow ◽

Waste Glass Powder ◽

Self Compact Concrete

In this work, waste glass powder from broken windows and plastic fibers from waste polyethylene terephthalate bottles are utilized to produce an economical self-compact concrete. Fresh properties (slump flow diameter, slump Flow T50, V. Funnel, L–Box), mechanical properties (Compressive strength and Flexural strength) and impact resistance of self-compact concrete are investigated. 15% waste glass powder as a partial replacement of cement with five percentages of polyethylene terephthalate plastic waste were adopted: 0% (reference), 0.5%, 0.75%, 1%, 1.25% and 1.5% by volume. It seems that the flow ability of self-compact concrete decreases with the increasing of the amount of plastic fibers. The compressive strength was increased slightly with plastic fiber content up to (0.75%), about 4.6% For more than (0.75%) plastic fiber. The compressive strength began to decrease about 15.2%. The results showed an improvement in flexural strength and an impact on the resistance in all tested specimens’ content of the plastic fibers, especially at (1.5%) fibers.

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Properties of Mortar with Recycled Aggregates, and Polyacrylonitrile Microfibers Synthesized by Electrospinning

Materials ◽

10.3390/ma12233849 ◽

2019 ◽

Vol 12 (23) ◽

pp. 3849 ◽

Cited By ~ 1

Author(s):

Manuel J. Chinchillas-Chinchillas ◽

Manuel J. Pellegrini-Cervantes ◽

Andrés Castro-Beltrán ◽

Margarita Rodríguez-Rodríguez ◽

Víctor M. Orozco-Carmona ◽

...

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Total Porosity ◽

Cementitious Materials ◽

Effective Porosity ◽

Recycled Aggregates ◽

Capillary Absorption ◽

Fine Aggregate ◽

Water Penetration

Currently it is necessary to find alternatives towards a sustainable construction, in order to optimize the management of natural resources. Thus, using recycled fine aggregate (RFA) is a viable recycling option for the production of new cementitious materials. In addition, the use of polymeric microfibers would cause an increase in the properties of these materials. In this work, mortars were studied with 25% of RFA and an addition of polyacrylonitrile PAN microfibers of 0.05% in cement weight. The microfibers were obtained by the electrospinning method, which had an average diameter of 1.024 µm and were separated by means of a homogenizer to be added to the mortar. Cementing materials under study were evaluated for compressive strength, flexural strength, total porosity, effective porosity and capillary absorption, resistance to water penetration, sorptivity and carbonation. The results showed that using 25% of RFA causes decreases mechanical properties and durability, but adding PAN microfibers in 0.05% caused an increase of 2.9% and 30.8% of compressive strength and flexural strength respectively (with respect to the reference sample); a decrease in total porosity of 5.8% and effective porosity of 7.4%; and significant decreases in capillary absorption (approximately 23.3%), resistance to water penetration (25%) and carbonation (14.3% after 28 days of exposure). The results showed that the use of PAN microfibers in recycled mortars allowed it to increase the mechanical properties (because they increase the tensile strength), helped to fill pores or cavities and this causes them to be mortars with greater durability. Therefore, the use of PAN microfibers as a reinforcement in recycled cementitious materials would be a viable option to increase their applications.

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Physical Properties of Polyester Polymer Concrete Composite Using RCSS Fine Aggregate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.687.219 ◽

2013 ◽

Vol 687 ◽

pp. 219-228

Author(s):

Eui Hwan Hwang ◽

Jin Man Kim ◽

Sun Gyu Park

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Physical Properties ◽

Water Resistance ◽

Strength Test ◽

Polymer Binder ◽

Hot Water ◽

Resistance Test ◽

Polymer Concrete ◽

Fine Aggregate

For the recycling of rapid-cooled steel slag (RCSS), various specimens were prepared with the different replacement ratios of RCSS and the addition ratios of polymer binder. The physical properties of these specimens were then investigated by compressive strength test, flexural strength test, water absorption test, hot water resistance test, measurement of pore distribution and observation of micro-structures using scanning electron microscope(SEM). Results showed that compressive and flexural strength increased with the addition ratios of polymer binder and replacement ratios of RCSS, but those strengths decreased reversely when addition ratio of polymer binder and replacement ratio of RCSS were excessively high. By the hot water resistance test, the compressive strength and flexural strength decreased remarkably and total pore volume increased but bulk density decreased. SEM observation of structure before hot water resistance test revealed very compact infusion of structure but decomposition or thermal degradation appeared in polymer binder when observed after the hot water resistance test.

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