Fine Aggregate In Concrete Mix Research Articles

Analisis Penambahan Serbuk Kayu Sebagai Kayu Sebagai Pengganti Terhadap Agregat Halus

This study aims to analyze the impact of adding sawdust as a substitute for fine aggregate in concrete mixes, with percentage variations of 1%, 1.5%, and 2%. The experiments involved the preparation of concrete mixtures with specific proportions according to each sawdust variation, and the formation of cylindrical concrete samples with a size of 15 cm x 30 cm. A total of 12 cylindrical specimens were prepared for each variation, ensuring representativeness and reliability of the results. Subsequently, mechanical properties of the concrete were tested, including compressive strength, resistance to compressive load, and resistance to deformation. The expected compressive strength plan was 16.9 MPa, but the test results showed a decrease in concrete at 1% by 11.99 MPa, at 1.5% by 7.14 MPa, and at 2% by 5.65 MPa. Analysis of these results provides a focal point for planning strategies to improve the performance of concrete with sawdust and ensure that its use does not compromise critical compressive strength. The findings of this study are expected to provide guidance for the construction industry in integrating alternative, more environmentally friendly materials into daily construction practices.

OPTIMALISASI PENGGUNAAN PASIR BESI SEBAGAI PENGGANTI AGREGAT HALUS DALAM CAMPURAN BETON MUTU TINGGI

Infrastructure progress needs to be supported by the development of research on construction material technology, one of which is concrete technology. With its various advantages, concrete is continuously used to solve infrastructure problems. However, it also has impact on the use of large-scale materials and has the potential to deplete natural resources if not handled properly. One material that can be used as an alternative is iron sand. Iron sand is a mineral resource with magnesium content and has characteristics as a substitute for fine aggregate in concrete mixes. This study aimed to determine the effect of iron sand as a substitute for fine aggregate in high-strength concrete mixtures. This research method was a laboratory experiment by testing the characteristics of high strength concrete, namely compressive strength, tensile strength, and modulus of elasticity. This study found that the optimum concrete compressive strength occurred in the V-02 sample with a result of 51.71 MPa from the design compressive strength (fcr) = 45 MPa. The optimum tensile strength test occurred in the V-02 sample with a result of 4.13 MPa, and the optimum elasticity modulus test occurred in the V-02 sample producing 28684.37 MPa

Chemical attack on concrete containing a high volume of crumb rubber as a partial replacement for fine aggregate in engineered cementitious composite (ECC)

Today, scrap tire is disposed of by open burning which harms the environment. To reduce the wastage of the resource, a sustainable approach is needed to dispose of the waste tire as a partial replacement of the fine aggregate in concrete mixes. This research has been conducted with a focus on the chemical attack of an engineered cementitious composite (ECC) containing a high volume of crumb rubber in terms of durability, behaviour, and comparison with conventional concrete. Two variables have been considered in developing rubberized ECC mixtures, that is, the amount of crumb rubber as a replacement for fine aggregate by volume of 0%–30% and PVA fibres by volume of 0%–2% to cementitious materials. The resistance properties of ECC incorporating crumb rubber were investigated for 13 different variable combinations developed using response surface methodology (RSM). The experimental results revealed that the presence of crumb rubber in the ECC matrix enhanced the resistance of the ECC in both acidic and sulphate environments. It was also revealed that by incorporating 15% crumb rubber, the loss of compressive strength significantly reduced from 38% to 15%.

Multi-Scale Study on Mechanical Property and Strength of New Green Sand (Poly Lactic Acid) as Replacement of Fine Aggregate in Concrete Mix

Polylactic acid (PLA) has made inroads in the commercial market segment with many unique characteristics. To list a few, such as tenacity, low flame rate, moisture regain percentage, loss of ignition percentage, combustion heat, UV resistance, elastic recovery, and higher melting point, make PLA a predominant material in the commercial market. This study is an attempt to test the feasibility of PLA’s mechanical property and strength aspects with cement mix. An article published on biodegradability aspects backed up by the essential preliminary strength and physical test results is discussed in detail in this manuscript. The work focuses on the multi-scale study along with mechanical properties and strengths to evaluate the elemental characteristics. Thermo gravimetric analysis revealed that PLA would hold inclusion into construction applications either in granular form or filament. Differential Scanning Calorimetry (DSC) found that PLA in filament form is the best inclusion material for construction applications. However, fiber’s tenacity has to be checked, as currently available filaments in the market do not have high tenacity value. From EDX(Energy-dispersive X-ray Spectroscopy) reports, 30% inclusion of PLA as a replacement for fine aggregate has constituent members as Calcium carbonate(CaCO3), Silica(SiO2), and Wollastonite (CaK) resulted in the best composition among the rest. FESEM images revealed that proper gradation in size, PLA granular form’s rough surface, or filament form would enhance the mechanical/physical behavior or even PLA’s chemical behavior.

Mechanical properties and durability of rubberized and SBR latex modified rubberized concrete

This paper analyses how rubber waste, used as replacement of fine aggregate in concrete mixes, affects mechanical properties and durability of concrete: freeze-thaw resistance, water absorption by immersion, and sulphate resistance. Concrete was modified by carboxylated styrene butadiene rubber (SBR) latex to get better bonding properties between rubber and hardened cement paste. Control specimens were made of concrete mix without crumb rubber. Scrap tyre rubber powder (crumb rubber – CR) of fraction 0/1mm and 1/2mm was used as fine aggregate. CR was used to replace a portion of fine aggregate at 5% of the total aggregate content. CR of fraction 0/1mm was found to improve freeze-thaw resistance: freeze-thaw resistance test results were similar to those of concrete with traditional air entrainment systems. On the contrary, coarser rubber particles of fraction 1/2mm had a negative effect on freeze-thaw resistance of concrete. These findings can be explained by the smoother texture and a more regular shape of coarse rubber particles up to 2 mm in size and the rougher texture and irregular shape of fine particles up to 1 mm in size. A complex profile of rubber particle surface results in higher volume of air voids, higher closed porosity and higher freeze-thaw resistance of concrete modified with crumb rubber. The test results confirmed that concrete modified with crumb rubber of smaller fraction had higher closed porosity and higher freeze-thaw durability factor Kf. The results also confirmed that Kf values calculated from concrete porosity parameters can be conveniently used to predict freeze-thaw resistance and durability of concrete. The tests have shown that the modification of concrete with rubber waste has no positive effect on sulphate resistance, compressive strength and modulus of elasticity.

Effect of Use of Substituted Oil Palm Shell Boiler Ash on Cement and Substituted Glass Powder on Fine Aggregate on Concrete Compressive Strength

This research aims to determine the effect of palm shell boiler ash substituted in cement and glass powder substituted on fine aggregate in concrete mixes on compressive strength and slump values and to determine the usefulness of the concrete. This research used an experimental method with 9 variations of substitution materials, a total of 60 samples of cube-shaped test specimens measuring 15cmx15cmx15cm. The variation of Oil palm shell boiler substitution used is 0%, 6%, 8%, and 10%, and for glass powder substitution variation is 0%, 5%, 10%, and 15%. From the results of the compressive strength test conducted on the 7th day, the substitution of 8% Oil palm shell boiler Ash and 10% glass powder or variation E received the highest compressive strength result of 19,593 MPaWhile on the 28th day, substitution of 6% oil palm shell boiler ash and 5% glass powder or variation A received the highest compressive strength yield of 22,630 MPa.

Feasibility Study on Use of Plastic Waste as Fine Aggregate in Concrete Mixes

Plastic is used in many forms in day-to-day life. Since Plastic is non-biodegradable, landfills do not provide an environment friendly solution. Hence, there is strong need to utilize waste plastic. This creates a large quantity of garbage every day which is unhealthy and pollutes the environment. In present scenario solid waste management is a challenge in our country. The production of solid waste is increasing day to day and causes serious concerns to the environment. In this study, the recycled plastics are used in the concrete as a partial replacement of fine aggregate in concrete. The main purpose of this study is to investigate the mechanical properties of concrete such as workability, compressive, flexural and split tensile strengths of concrete mixes with partial replacement of conventional fine aggregate with aggregate produced from plastic waste. The use of plastic aggregate as replacement for fine aggregate enhances workability and fresh bulk density of concrete mixes. The mechanical properties of concrete such as compressive, flexural, and tensile strengths of concrete reduced marginally up to 10% replacement levels.

Feasibility Study on Use of Plastic Waste as Fine Aggregate in Concrete Mixes

Plastic is used in many forms in day-to-day life. Since Plastic is non-biodegradable, landfills do not provide an environment friendly solution. Hence, there is strong need to utilize waste plastic. This creates a large quantity of garbage every day which is unhealthy and pollutes the environment. In present scenario solid waste management is a challenge in our country. The production of solid waste is increasing day to day and causes serious concerns to the environment. In this study, the recycled plastics are used in the concrete as a partial replacement of fine aggregate in concrete. The main purpose of this study is to investigate the mechanical properties of concrete such as workability, compressive, flexural and split tensile strengths of concrete mixes with partial replacement of conventional fine aggregate with aggregate produced from plastic waste. The use of plastic aggregate as replacement for fine aggregate enhances workability and fresh bulk density of concrete mixes. The mechanical properties of concrete such as compressive, flexural, and tensile strengths of concrete reduced marginally up to 10% replacement levels.Plastic is used in many forms in day-to-day life. Since Plastic is non-biodegradable, landfills do not provide an environment friendly solution. Hence, there is strong need to utilize waste plastic. This creates a large quantity of garbage every day which is unhealthy and pollutes the environment. In present scenario solid waste management is a challenge in our country. The production of solid waste is increasing day to day and causes serious concerns to the environment. In this study, the recycled plastics are used in the concrete as a partial replacement of fine aggregate in concrete. The main purpose of this study is to investigate the mechanical properties of concrete such as workability, compressive, flexural and split tensile strengths of concrete mixes with partial replacement of conventional fine aggregate with aggregate produced from plastic waste. The use of plastic aggregate as replacement for fine aggregate enhances workability and fresh bulk density of concrete mixes. The mechanical properties of concrete such as compressive, flexural, and tensile strengths of concrete reduced marginally up to 10% replacement levels.

Effect on Mechanical Properties of M35 Grade Concrete by Partial Replacement of Fine Aggregate with Copper Slag .

In present situation, fast urbanization has made a gigantic interest for regular sand consequently made it considerably more costly. Excess extraction of sand ,trending not only depletion of water table but also streams and rivers are diverting in their direction which leads to floods. Elective materials in all types of constructions are acquainted with decrease the weight on normal materials, further maintaining the economical status of project. While additionally dealing with the encompassing condition. Squander Materials like Copper Slag, Flyash, Carbonate Sand, stone residue and so forth having silica sythesis (SiO2) could be utilized as a substitution for Fine aggregate in a concrete mix. In the process of manufacturing copper the bi-product Copper slag is produced in an heavy quantity. Copper slag has an high specific gravity and has glassy granular texture. Copper slag contains the same particle sizes as of fine aggregate so that it can be used as a replacement for fine aggregate in concrete mix. Here in this paper the main objective is to consider the utilization of Copper slag as an elective substitution material of Fine aggregate. Additionally examines the after effect of substitution of Fine aggregate with Copper slag on mechanical characteristics of cement concrete such as Compressive strength and Flexural strength.

Employing atomic force microscopy technique and X-ray diffraction analysis to examine nanostructure and phase of glass concrete

The effect of waste glass as fine aggregate in concrete mixes was investigated at nano-level by using atomic force microscopy (AFM) technique. In this technique, cantilever arm was operated in tapping mode on concrete samples to classify different phases such as CSH gel, un-hydrated cement particles and voids. The present study also examines the roughness at ITZ (interfacial transition zone) between aggregate and cement matrix. The images obtained through this technique showed dense formation of CSH gel with reduced roughness at 20% substitution level. In addition, hydration products were also studied by performing X-ray diffraction (XRD) analyses which showed the enhanced formation of hydration products and ITZ at 20% replacement level.

Utilization of unprocessed steel slag as fine aggregate in normal- and high-strength concrete

With the increasing shortage of natural materials, using steel slag instead of natural sand to prepare concrete has become a promising technology. This study aims to investigate the utilization of unprocessed steel slag in normal- and high-strength concrete, focusing on the effects of steel slag as fine aggregate on the compressive behaviour of concrete. Two types of concrete (normal- and high-strength concrete) and eight replacement percentages of fine aggregate by steel slag (0%, 10%, 20%, 30%, 40%, 60%, 80%, and 100%) are used as the test parameters. A series of axial compression tests are conducted on cylinders of fine steel slag concrete (SSC). The influence of the replacement percentage of steel slag on the stress-strain relation, compressive strength, inflation ratio, elastic modulus, and toughness of normal- and high-strength concrete is analysed. Moreover, the failure mechanism of SSC under compression is discussed. The results show that the compressive strength of SSC is not monotonous with increasing steel slag content and that the use of steel slag as fine aggregate in concrete mixes has a positive effect on the energy absorption capacity. SSC with an optimal steel slag content can exhibit better compressive behaviour compared with normal concrete.

Rubber concrete: Mechanical and dynamical properties

The purpose of this paper is to report on an experimental study that explores the effect of using recycled rubber powder as an alternate fine aggregate in concrete mixes. Natural sand in the concrete mixes was partially replaced by 5%, 10%, 15%, and 20%. Physical properties such as the density, the compressive strength, the fresh concrete properties, the split-tension, and the impact load capacity are examined. The results revealed a decrease in the compressive strength of concrete cylinders containing rubber. The dynamic performance of the rubber concrete is of high importance because of its high resilient nature, as the rubber particles that are included in the concrete have a positive effect on the dynamic performance. The conclusions that were derived from this research implicate potential applications where rubberized concrete can be efficiently used. Even though rubberized concrete mixture generally has a reduced compressive strength that may limit its use in certain structural applications, it possesses a number of desirable properties, such as lower density, higher toughness, and higher impact resistance compared to conventional concrete.

Assessment of Utilizing Marble Stone Dust and Wood Saw Dust as Partial Replacement for Cement and Sand in Concrete

Marble stone dust and wood saw dust have been used in concrete mixes as partial replacement for fine and coarse aggregates separately in recent years. The increase or decrease in strength is due to the addition in the percentage of marble stone dust and wood saw dust. Studies have been conducted on determining the optimum marble stone dust and wood saw dust percentage to meet the desired strength of concrete in construction. In this study, marble stone dust (MSD) and wood saw dust (WSD) were used as partial replacement for cement and fine aggregate in concrete mix respectively. The test samples were prepared by replacing 0%, 2%, 4%, and 6% of cement and fines by weight of concrete with MSD and WSD. The combined effect of MSD and WSD on the workability, compressive strength and flexural strength of concrete was investigated. It was found that both compressive and flexural strength gradually decrease with increase in the percentage of marble stone dust and wood saw dust.

Assessment of Utilizing Marble Stone Dust and Wood Saw Dust as Partial Replacement for Cement and Sand in Concrete

Marble stone dust and wood saw dust have been used in concrete mixes as partial replacement for fine and coarse aggregates separately in recent years. The increase or decrease in strength is due to the addition in the percentage of marble stone dust and wood saw dust. Studies have been conducted on determining the optimum marble stone dust and wood saw dust percentage to meet the desired strength of concrete in construction. In this study, marble stone dust (MSD) and wood saw dust (WSD) were used as partial replacement for cement and fine aggregate in concrete mix respectively. The test samples were prepared by replacing 0%, 2%, 4%, and 6% of cement and fines by weight of concrete with MSD and WSD. The combined effect of MSD and WSD on the workability, compressive strength and flexural strength of concrete was investigated. It was found that both compressive and flexural strength gradually decrease with increase in the percentage of marble stone dust and wood saw dust.

Crushed rubber waste impact of concrete basic properties

Cement CEM I 42.5 N was used for the investigation. Waste tire crumb rubber classified into fractions 2/4 and 4/6 was used for the tests. Sand in concrete mixes was replaced by crumb rubber at the proportion from 5% to 20%. Compressive strength, water absorption, ultrasonic pulse velocity in concrete modified with crumb rubber were measured in the tests. Structural performance indicators of concrete specimens were calculated. The tests results revealed that compressive strength dropped 68–61.3%. The calculation of structural performance indicators showed that higher content of crumb rubber in the mix reduces the relative pore and capillary wall thickness and the spare pore space. With higher content of crumb rubber in the specimens the spatial inhomogeneity indicator gradually increases because the bigger amount of coarser rubber granule causes uneven distribution of pores and capillaries by their length. When up to 20% of fine aggregate in concrete mixes is replaced by crumb rubber the predicted freeze-thaw resistance increases.

The Behaviour of Rubber Tyre as Fine Aggregate in Concrete Mix

Usage of waste materials as concrete mixture can reduce the waste management crisis in the world. Used tyres were widely researched as an alternative source of aggregates replacement in concrete mixture. This research is to study the behaviour of concrete incorporating rubber tyre crumb as fine aggregate replacement. The workability, compression strength and water absorption of this concrete will be determined and then compared to normal concrete. Motorcycle inner tube will be used as rubber source and it will be shredded to crumbs. Three samples of concrete with rubber as fine aggregates were prepared. Rubber crumbs will be used to replace fine aggregates in 2.5, 5.0 and 7.5% in mass. Normal concrete were prepared separately as control for comparison. Concrete mixture of 1:2:4 and 0.5 of water cement ratio were used. Slump test were done to test the workability of each mix. Twelve sample cubes from (150mm x 150mm x 150mm) each mix were prepared and cured for 7, 14 and 28 days. Compression tests were performed for each mix cube at age 7, 14 and 28 days. Water absorption test were done at age 28 days. Results revealed that rubberized concrete has better workability than normal concrete. They also have smaller compressive value and higher water absorption compared to normal concrete.