The Experts below are selected from a list of 5412 Experts worldwide ranked by ideXlab platform
L. Gündüz - One of the best experts on this subject based on the ideXlab platform.
-
Strength properties of volcanic Slag Aggregate lightweight concrete for high performance masonry units
Construction and Building Materials, 2008Co-Authors: S. Demirdag, L. GündüzAbstract:Abstract The production of lightweight masonry block is in most countries a highly mechanised industry based on great automation and accuracy. This production has to match strict standards that describe properties specified for the products. These may include denotations on sizes, strength, weather resistance, insulating properties and fire resistance. Volcanic Slag can be used as Aggregates in lightweight concrete that meets all these requirements. In order to produce the high performance masonry units in the civil engineering applications, lightweight concrete mixtures containing the fine volcanic Slag Aggregate (FVSA) in reddish colour and coarse volcanic Slag Aggregate (CVSA) from near Manisa City, Aegean Region of Turkey were tested and the research findings were discussed in this paper. To analyse the effects of FVSA and CVSA/cement ratios on the lightweight concrete engineering properties for masonry block making, the range of different volcanic Slag Aggregate/cement (A/C) ratios of 5/1 to 30/1 by weight and cement contents of 41, 68, 95, 108, 135 and 162 kg/m3 were used to make volcanic Slag Aggregate lightweight concrete (VSALC) mixture testing samples with a slump of from 3 mm to 5 mm. Volcanic Slag lightweight blocks (VSLB) are made of volcanic Slag, cement and water, which are used in construction of non-load bearing infill walls and slabs. One of the most effective ways to reduce the dead load in a multi storey building is to lighten the weight of the structure. VSLB can be manufactured from a density range of 600–1300 kg/m3 with an average reduction in weight of 30–40% as compared to conventional slabs. They are by enabling reduction in structural cost. The experimental research findings showed that VSALC has strengths comparable to other natural lightweight Aggregate concrete, yet is typically 10–20% slightly heavier. The properties, which increase in value and indicate the increasing quality with lower A/C ratios (high cement contents), are compressive strength, density and thermal conductivity. Property, which decreases in value and indicate the increasing quality, with lower A/C ratios is water absorption. In all cases, lowering the A/C ratio (higher cement content) increases quality. The research showed that high performance masonry units can be produced by the use of fine and coarse volcanic Slag Aggregated lightweight concrete.
-
Strength properties of volcanic Slag Aggregate lightweight concrete for high performance masonry units
Cement & Concrete Composites, 2008Co-Authors: S. Demirdag, L. GündüzAbstract:The production of lightweight masonry block is in most countries a highly mechanised industry based on great automation and accuracy. This production has to match strict standards that describe properties specified for the products. These may include denotations on sizes, strength, weather resistance, insulating properties and fire resistance. Volcanic Slag can be used as Aggregates in lightweight concrete that meets all these requirements. In order to produce the high performance masonry units in the civil engineering applications, lightweight concrete mixtures containing the fine volcanic Slag Aggregate (FVSA) in reddish colour and coarse volcanic Slag Aggregate (CVSA) from near Manisa City, Aegean Region of Turkey were tested and the research findings were discussed in this paper. To analyse the effects of FVSA and CVSA/cement ratios on the lightweight concrete engineering properties for masonry block making, the range of different volcanic Slag Aggregate/cement (A/C) ratios of 5/1 to 30/1 by weight and cement contents of 41, 68, 95, 108, 135 and 162 kg/m3 were used to make volcanic Slag Aggregate lightweight concrete (VSALC) mixture testing samples with a slump of from 3 mm to 5 mm. Volcanic Slag lightweight blocks (VSLB) are made of volcanic Slag, cement and water, which are used in construction of non-load bearing infill walls and slabs. One of the most effective ways to reduce the dead load in a multi storey building is to lighten the weight of the structure. VSLB can be manufactured from a density range of 600–1300 kg/m3 with an average reduction in weight of 30-40% as compared to conventional slabs. They are by enabling reduction in structural cost. The experimental research findings showed that VSALC has strengths comparable to other natural lightweight Aggregate concrete, yet is typically 10-20% slightly heavier. The properties, which increase in value and indicate the increasing quality with lower A/C ratios (high cement contents), are compressive strength, density and thermal conductivity. Property, which decreases in value and indicate the increasing quality, with lower A/C ratios is water absorption. In all cases, lowering the A/C ratio (higher cement content) increases quality. The research showed that high performance masonry units can be produced by the use of fine and coarse volcanic Slag Aggregated lightweight concrete. (A) Reprinted with permission from Elsevier.
S. Demirdag - One of the best experts on this subject based on the ideXlab platform.
-
the effects of cement fly ash ratios on the volcanic Slag Aggregate lightweight concrete masonry units
Construction and Building Materials, 2008Co-Authors: S. Demirdag, I Ugur, Saim SaracAbstract:Abstract Masonry is one of the oldest construction materials, which was used for all kind of building applications especially for sufficient compressive strength in combination with good acoustic and thermal properties with low construction costs and solving some durability problems. The production of lightweight masonry block is generally performed by using a highly mechanised industry based on great automation and accuracy which is different from the other concrete types. This production has to match strict standards that describe properties specified for the products. Volcanic Slag lightweight blocks (VSLB) are made of volcanic Slag, cement and water, which are used in construction of non-load bearing infill walls and slabs. One of the most effective ways to reduce the dead load in a multi storey building is to lighten the weight of the structure. Therefore, natural lightweight Aggregates, especially produced from the volcanic Slag can be considered as a lightweight concrete Aggregate in construction of buildings. In this research, control lightweight concrete (CLC) mixtures containing volcanic Slag Aggregates (VSA) with only normal portland cement (NPC) and finally with fly ash lightweight concrete (FALC) mixture containing 20% of FA as a replacement of the cement by volume were prepared and tested. In addition, no-fines Aggregate was prepared from which the fine Aggregate component of the matrix under 1 mm was entirely omitted and no-fines Aggregate mixtures with NPC and FALC were compared with CLC and the effect of FA on the strength and unit volume weight was analysed. VSA samples were obtained from the quarries near Manisa City, Aegean Region of Turkey and after some crushing processes; samples were classified into specialized size fractions (0–4 mm as fine Aggregates (FVSA), 4–8 mm as coarse Aggregates (CVSA) and 1–4 mm no fines Aggregates). From those Aggregates, several cubic samples were prepared by using different ratios of size fractions (60% fine and 40% coarse) including 5%, 8%, 10% cement by volume. FALC mixture containing 20% of FA as a replacement of the cement was prepared for analysing the unit weight and compressive strength results with demanding criterions of current standards. The research showed that, masonry units having desired properties can be produced by using fine and coarse VSA lightweight Aggregate in the mixture with 10% cement by volume.
-
Strength properties of volcanic Slag Aggregate lightweight concrete for high performance masonry units
Construction and Building Materials, 2008Co-Authors: S. Demirdag, L. GündüzAbstract:Abstract The production of lightweight masonry block is in most countries a highly mechanised industry based on great automation and accuracy. This production has to match strict standards that describe properties specified for the products. These may include denotations on sizes, strength, weather resistance, insulating properties and fire resistance. Volcanic Slag can be used as Aggregates in lightweight concrete that meets all these requirements. In order to produce the high performance masonry units in the civil engineering applications, lightweight concrete mixtures containing the fine volcanic Slag Aggregate (FVSA) in reddish colour and coarse volcanic Slag Aggregate (CVSA) from near Manisa City, Aegean Region of Turkey were tested and the research findings were discussed in this paper. To analyse the effects of FVSA and CVSA/cement ratios on the lightweight concrete engineering properties for masonry block making, the range of different volcanic Slag Aggregate/cement (A/C) ratios of 5/1 to 30/1 by weight and cement contents of 41, 68, 95, 108, 135 and 162 kg/m3 were used to make volcanic Slag Aggregate lightweight concrete (VSALC) mixture testing samples with a slump of from 3 mm to 5 mm. Volcanic Slag lightweight blocks (VSLB) are made of volcanic Slag, cement and water, which are used in construction of non-load bearing infill walls and slabs. One of the most effective ways to reduce the dead load in a multi storey building is to lighten the weight of the structure. VSLB can be manufactured from a density range of 600–1300 kg/m3 with an average reduction in weight of 30–40% as compared to conventional slabs. They are by enabling reduction in structural cost. The experimental research findings showed that VSALC has strengths comparable to other natural lightweight Aggregate concrete, yet is typically 10–20% slightly heavier. The properties, which increase in value and indicate the increasing quality with lower A/C ratios (high cement contents), are compressive strength, density and thermal conductivity. Property, which decreases in value and indicate the increasing quality, with lower A/C ratios is water absorption. In all cases, lowering the A/C ratio (higher cement content) increases quality. The research showed that high performance masonry units can be produced by the use of fine and coarse volcanic Slag Aggregated lightweight concrete.
-
Strength properties of volcanic Slag Aggregate lightweight concrete for high performance masonry units
Cement & Concrete Composites, 2008Co-Authors: S. Demirdag, L. GündüzAbstract:The production of lightweight masonry block is in most countries a highly mechanised industry based on great automation and accuracy. This production has to match strict standards that describe properties specified for the products. These may include denotations on sizes, strength, weather resistance, insulating properties and fire resistance. Volcanic Slag can be used as Aggregates in lightweight concrete that meets all these requirements. In order to produce the high performance masonry units in the civil engineering applications, lightweight concrete mixtures containing the fine volcanic Slag Aggregate (FVSA) in reddish colour and coarse volcanic Slag Aggregate (CVSA) from near Manisa City, Aegean Region of Turkey were tested and the research findings were discussed in this paper. To analyse the effects of FVSA and CVSA/cement ratios on the lightweight concrete engineering properties for masonry block making, the range of different volcanic Slag Aggregate/cement (A/C) ratios of 5/1 to 30/1 by weight and cement contents of 41, 68, 95, 108, 135 and 162 kg/m3 were used to make volcanic Slag Aggregate lightweight concrete (VSALC) mixture testing samples with a slump of from 3 mm to 5 mm. Volcanic Slag lightweight blocks (VSLB) are made of volcanic Slag, cement and water, which are used in construction of non-load bearing infill walls and slabs. One of the most effective ways to reduce the dead load in a multi storey building is to lighten the weight of the structure. VSLB can be manufactured from a density range of 600–1300 kg/m3 with an average reduction in weight of 30-40% as compared to conventional slabs. They are by enabling reduction in structural cost. The experimental research findings showed that VSALC has strengths comparable to other natural lightweight Aggregate concrete, yet is typically 10-20% slightly heavier. The properties, which increase in value and indicate the increasing quality with lower A/C ratios (high cement contents), are compressive strength, density and thermal conductivity. Property, which decreases in value and indicate the increasing quality, with lower A/C ratios is water absorption. In all cases, lowering the A/C ratio (higher cement content) increases quality. The research showed that high performance masonry units can be produced by the use of fine and coarse volcanic Slag Aggregated lightweight concrete. (A) Reprinted with permission from Elsevier.
Ali Fallah Pour - One of the best experts on this subject based on the ideXlab platform.
-
normal and high strength concretes incorporating air cooled blast furnace Slag coarse Aggregates effect of Slag size and content on the behavior
Construction and Building Materials, 2016Co-Authors: Togay Ozbakkaloglu, Ali Fallah PourAbstract:Abstract Over the past two decades, air-cooled blast furnace Slag Aggregates have been considered as an alternative coarse Aggregate material in concrete toward attaining resource sustainability in the construction industry. It is now recognized that the application of Slag Aggregates to form recycled Slag Aggregate concrete (SAC) is a highly promising technology to reduce environmental impact of both the Slag waste and concrete. This paper presents the first experimental study on mechanical properties of SAC prepared with coarse Slag Aggregates of different sizes. Normal- and high-strength SACs were manufactured with two different grades of Slag Aggregates. Tests were undertaken to establish the compressive strength, elastic modulus, splitting tensile strength, workability, and fresh and hardened density of each batch. The results show that the investigated mechanical properties of concretes with larger Slag Aggregates are higher than those of the companion mixes with smaller Aggregates. Results also show that the mechanical properties of SACs decrease with an increase in the Slag Aggregate content. Although it has been shown that SACs exhibit inferior properties compared to those of natural Aggregate concretes, this difference is not excessive in normal-strength SACs with up to 100% Slag Aggregates and high-strength SACs with up to 50% Slag Aggregates, suggesting that the technique investigated in this study can provide an attractive avenue for value-added use of air-cooled blast furnace Slag.
Cuneyt Ulu - One of the best experts on this subject based on the ideXlab platform.
-
recycling of waste pet granules as Aggregate in alkali activated blast furnace Slag metakaolin blends
Construction and Building Materials, 2014Co-Authors: Semiha Akcaozoglu, Cuneyt UluAbstract:Abstract In this study the utilization of waste PET Aggregate in alkali-activated Slag and Slag/metakaolin blended mortar was investigated. Sodium hydroxide (NaOH) pellets and liquid sodium silicate were used as activators. Eighteen different mortar mixtures were prepared for the laboratory tests. In the reference mixture, unground Slag (max size of 4 mm) was used as Aggregate. In PET Aggregate mixtures, Slag Aggregate was replaced with waste PET Aggregate, in amount of 20%, 40%, 60%, 80% and 100% by volume. The water-binder (w/b) ratio and Aggregate-binder ratio used in the mixtures were 0.50 and 2.75, respectively. The unit weight, compressive strength, flexural tensile strength, ultrasonic wave velocity and water absorption and porosity ratios of the mixtures were measured. The test results showed that, using PET Aggregate contributed to decrease of unit weight of alkali-activated mortars due to the low density of PET Aggregate. Although the strength values of the specimens decreased depending on increasing waste PET Aggregate amount, the compressive strength values of the alkali-activated Slag mortars containing waste PET Aggregate were satisfactory. In addition, alkali-activated Slag mixtures containing 60% and 80% waste PET Aggregate were drop into structural lightweight concrete category in terms of unit weight and strength properties. However, the compressive strengths of alkali-activated Slag/metakaolin blended mixtures were lower than alkali-activated Slag mixtures at the same cure condition. It is concluded from the test results that there is a potential for the use of waste PET as Aggregate in the production of alkali-activated Slag mortar. Because of using waste materials as binder and Aggregate for mortar production in this study, alkali-activated Slag mortar with PET Aggregate is thought to be a good alternative for recycling of waste materials.
Chan-gi Park - One of the best experts on this subject based on the ideXlab platform.
-
Physical and Mechanical Properties of Rural-Road Pavement Concrete in South Korea Containing Air-Cooled Blast-Furnace Slag Aggregates
'MDPI AG', 2021Co-Authors: Byung-hwan Ahn, Su-jin Lee, Chan-gi ParkAbstract:The purpose of this study was to assess the physical and mechanical properties of pavement concrete for rural roads of South Korea made with air-cooled Slag Aggregate, which is an industrial byproduct. This study assessed the physical and chemical properties according to the following performance requirements based on the design criteria of the Korea Ministry of Agriculture’s Agricultural Production Infrastructure Maintenance Business Plan and the Korea Expressway Corporation’s Highway Construction Specialized Specifications: slump of 80 mm or greater, air content of 4.5 ± 1.5%, compressive strength of at least 21 MPa, splitting tensile strength of at least 4.2 MPa, and a chloride penetration resistance of less than 4000 C. The slump, air content, compressive strength, splitting tensile strength, flexural strength, and chloride ion permeability of the Aggregate-containing concretes were measured. The air-cooled Slag Aggregates provided the necessary physical and chemical properties and presented no environmental issues. Furthermore, the slump and air content of concrete made with the Aggregates met the target values. The slump decreased and the air content increased with increasing amounts of air-cooled Slag Aggregate. Mechanical testing of the concretes containing air-cooled Slag Aggregate established that they met the performance requirements for rural road pavement
-
plant growth and water purification of porous vegetation concrete formed of blast furnace Slag natural jute fiber and styrene butadiene latex
Sustainability, 2016Co-Authors: Hwanghee Kim, Chan-gi ParkAbstract:The purpose of this study is to investigate porous vegetation concrete formed using the industrial by-products blast furnace Slag powder and blast furnace Slag Aggregates. We investigated the void ratio, compressive strength, freeze–thaw resistance, plant growth and water purification properties using concretes containing these by-products, natural jute fiber and latex. The target performance was a compressive strength of ≥12 MPa, a void ratio of ≥25% and a residual compressive strength of ≥80% following 100 freeze–thaw cycles. Using these target performance metrics and test results for plant growth and water purification, an optimal mixing ratio was identified. The study characterized the physical and mechanical properties of the optimal mix, and found that the compressive strength decreased compared with the default mix, but that the void ratio and the freeze–thaw resistance increased. When latex was used, the compressive strength, void ratio and freeze–thaw resistance all improved, satisfying the target performance metrics. Vegetation growth tests showed that plant growth was more active when the blast furnace Slag Aggregate was used. Furthermore, the use of latex was also found to promote vegetation growth, which is attributed to the latex forming a film coating that suppresses leaching of toxic components from the cement. Water purification tests showed no so significant differences between different mixing ratios; however, a comparison of mixes with and without vegetation indicated improved water purification in terms of the total phosphorus content when vegetation had been allowed to grow.