An Experimental Study on Mechanical Properties of Self Compacting Concrete by using Fiber Reinforcement

The invention of Self Compacting Concrete has been tremendous and continuing growth in the working area over the past decade, culminating in its widespread usage in today’s reality. It outperforms regular cement in application and completion, cost, work reserve funds, and solidity. The addition of strands enhances its qualities, particularly those related to SCC’s post- break behaviour. The goal is to investigate the strength properties of SCC when mixed with various types of strands. Different strand types and filament speeds are among the variables studied. The essential characteristics of SCC, including strength, break energy, sturdiness, and sorptivity, must be controlled. The hydrated design and security development between fiber and blend will be examined using an electron microscope to examine the tiny building of several mixes. 12mm cut glass fiber, carbon fiber, and basalt fiber will be used in the request, as they have been for quite some time. 0.0 percent, 0.1 percent, 0.15 percent, 0.2 percent, 0.25 percent, and 0.3 percent of strands are removed based on volume. The request is broken down into two parts. The first half involves creating a planned blend for SCC of a detailed assessment, such as M30. The second half involves adding filaments such as glass, basalt, and carbon strands to the SCC blends and evaluating and verifying their plastic and hardened properties. The experiment demonstrates a modest improvement in SCC aspects by adding strands of various types and altering the volume. Carbon fiber is the most improved in the more challenging state, followed by Basalt fiber and Glass fiber, and the least improved in the plastic state due to its high-water absorption. Glass fiber fared better in the plastic state. Basalt fiber fared better in the present study regarding cost, appropriate amount, and overall viability.

An Experimental Study on Mechanical Properties of Self Compacting Concrete by using Fiber Reinforcement

The invention of Self Compacting Concrete has been tremendous and continuing growth in the working area over the past decade, culminating in its widespread usage in today's reality. It outperforms regular cement in application and completion,cost, work reserve funds, and solidity. The addition of strands enhances its qualities, particularly those related to SCC's post- break behaviour. The goal is to investigate the strength properties of SCC when mixed with various types of strands. Different strand types and filament speeds are among the variables studied. The essential characteristics of SCC, including strength, break energy, sturdiness, and sorptivity, must be controlled. The hydrated design and security development between fiber and blend will be examined using an electron microscope to examine the tiny building of several mixes. 12mm cut glass fiber, carbon fiber, and basalt fiber will be used in the request, as they have been for quite some time. 0.0 percent, 0.1 percent, 0.15 percent, 0.2 percent, 0.25 percent, and 0.3 percent of strands are removed based on volume. The request is broken down into two parts. The first half involves creating a planned blend for SCC of a detailed assessment, such as M30. The second half involves adding filaments such as glass, basalt, and carbon strands to the SCC blends and evaluating and verifying their plastic and hardened properties. The experiment demonstrates a modest improvement in SCC aspects by adding strands of various types and altering the volume. Carbon fiber is the most improved in the more challenging state, followed by Basalt fiber and Glass fiber, and the least improved in the plastic state due to its high-water absorption. Glass fiber fared better in the plastic state. Basalt fiber fared better in the present study regarding cost, appropriate amount, and overall viability

Shape and volume optimization of industrial parts

In the present time, there are many challenges in the production of industrial parts. Due to the constantly rising prices of materials and energy, it is necessary to constantly look for ways to optimize production costs and optimize material consumption. There is great pressure on economical production, i. to produce products with the lowest costs given the expected and necessary properties. With the introduction of additive manufacturing technologies into practice and the production of parts for end use comes the introduction of methods for optimizing the shape of the part and the required amount of material for its production. We call this method Topological Optimization. The presented article describes the preparation of topologically optimized parts and a comparison of their strength properties with respect to the original and the original part.

Evaluation of the Effect of Granite Waste Powder by Varying the Molarity of Activator on the Mechanical Properties of Ground Granulated Blast-Furnace Slag-Based Geopolymer Concrete

Industrial waste such as Ground Granulated Blast-Furnace Slag (GGBS) and Granite Waste Powder (GWP) is available in huge quantities in several states of India. These ingredients have no recognized application and are usually shed in landfills. This process and these materials are sources of severe environmental pollution. This industrial waste has been utilized as a binder for geopolymers, which is our primary focus. This paper presents the investigation of the optimum percentage of granite waste powder as a binder, specifically, the effect of molar and alkaline to binder (A/B) ratio on the mechanical properties of geopolymer concrete (GPC). Additionally, this study involves the use of admixture SP-340 for better performance of workability. Current work focuses on investigating the effect of a change in molarity that results in strength development in geopolymer concrete. The limits for the present work were: GGBS partially replaced by GWP up to 30%; molar ranging from 12 to 18 with the interval of 2 M; and A/B ratio of 0.30. For 16 M of GPC, a maximum slump was observed for GWP with 60 mm compared to other molar concentration. For 16 M of GPC, a maximum compressive strength (CS) was observed for GWP with 20%, of 33.95 MPa. For 16 M of GPC, a maximum STS was observed for GWP, with 20%, of 3.15 MPa. For 16 M of GPC, a maximum FS was observed for GWP, with 20%, of 4.79 MPa. Geopolymer concrete has better strength properties than conventional concrete. GPC is $13.70 costlier than conventional concrete per cubic meter.

Optimal Replacement of Granite Modified with Ife Iron and Steel Slag on Strength Properties of Concrete

Steel is produced from iron ore and purification of metal scrap, leading to manufacture of hundreds of tonnes of steel slag each year. This study investigated the optimum replacement of granite with Ife Iron and Steel Nigeria Limited (ISN) slag that produce maximum Compressive Strength (CS), Split Tensile Strength (STS) and Flexural Strength (FS) of concrete using Response Surface Methodology (RSM) from Design Expert Version 7.0. The outcome of the study showed that the optimum replacement of granite with ISN was 28.85% ISN at 0.47 W/C.

Homogenization Modes Effect on Mechanical Properties and Corrosive Characteristics of the Rolled Products from Al-Mg (1570) Aluminum Alloy with Addition of Scandium and Zirconium

Objective of the study: study of various homogenization modes effects on mechanical and corrosive properties of rolled sheets from Al-Mg system alloy 1570 with additions of zirconium and scandium transition metals. The sheets were produced in laboratory conditions from the ingot, cast in production DC mold based on the commercial production practices and treatment modes. 4 homogenization modes, 2 tempers H12 and H321, and several modes of stabilization annealing in the temperature range from 240 °C to 325 °C have been reviewed. The samples have been comprehensively examined using optic and electron scanning microscope, mechanical properties were achieved by break test in compliance with ISO 6892-1, corrosion was examined using ASTM G66 and G67 standards. The curve of 1570 alloy sheets softening as the function of annealing temperature was constructed. It was demonstrated that the increasing temperature effect during homogenization leads to strength properties decrease and corrosion resistance improvement due to interdendritic segregation elimination. Among analyzed homogenization modes, 360 - 380 °C - 6 h mode is established as the most practical, and the sheets. produced without stabilization annealing, occurred to be the most resistant to exfoliation corrosion. The sheets, subjected to annealing at 260 °C - 2 h, show no traces of layer corrosion, but have pit corrosion locations rated as «PC» based on ASTM G-66 classification, such rating is unacceptable for the manufacture of products for use in the marine environment.

Electron Microscope Studies of the 01Cr17Ni13Mo3 Austenitic Steel Structure after Cold Rolling Combined with Hydrogen Alloying with Varying Degrees of Deformation

In this paper, we consider the effect of cold rolling and hydrogen alloying on the formation of twin boundaries of the corrosion resistance of austenitic steel 01Cr17Ni13Mo3. Using the method of transmission electronic microscopy, microdiffraction patterns were obtained. The analysis of microdiffraction patterns indicates the formation of a developed grain-subgrain structure with small-angle and large-angle misorientation. The structure has a high dislocation density, deformation twins and localized shift bands. It was established that plastic deformation by flat rolling to ε = 90 % at room temperature does not contribute to the appearance of a noticeable amount of α' and ε-martensite. At the temperature of liquid nitrogen, the samples were found to form a small fraction of the α'-martensite phase. Such a small amount of martensite can contribute to steel strengthening, and a decrease in the rolling temperature will lead to an increase in the strength properties of steel. It was detected that the density of twin boundaries under the decrease in the rolling temperature but with the same intensity of hydrogen saturation is significantly higher. A noticeable reduction in the width of the twin lamellas was revealed.

Compressive properties of cell structures manufactured by photo-curing technology liquid polymer resins – Polyjet Matrix

The article presents the results of compressive strength tests of cylindrical samples with a hexagonal cell structure. The samples were made of MED 610 material using the photo-curing technology liquid polymer resins. The compressive strength was estimated on the basis of a static compression test of the printed elements. It has been shown that the PolyJet Matrix 3D printing technology enables the printing models with a thin-walled cell structure, which, while maintaining the appropriate strength properties, can be used in the design and production of certain utility models.

Concrete with Partial Substitution of Waste Glass and Recycled Concrete Aggregate

The current practice of concrete is thought to be unsuitable because it consumes large amounts of cement, sand, and aggregate, which causes depletion of natural resources. In this study, a step towards sustainable concrete was made by utilizing recycled concrete aggregate (RCA) as a coarse aggregate. However, researchers show that RCA causes a decrease in the performance of concrete due to porous nature. In this study, waste glass (WG) was used as a filler material that filled the voids between RCA to offset its negative impact on concrete performance. The substitution ratio of WG was 10, 20, or 30% by weight of cement, and RCA was 20, 40, and 60% by weight of coarse aggregate. The slump cone test was used to assess the fresh property, while compressive, split tensile, and punching strength were used to assess the mechanical performance. Test results indicated that the workability of concrete decreased with substitution of WG and RCA while mechanical performance improved up to a certain limit and then decreased due to lack of workability. Furthermore, a statical tool response surface methodology was used to predict various strength properties and optimization of RCA and WG.