The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Natt Makul - One of the best experts on this subject based on the ideXlab platform.
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innovative utilization of foundry sand waste obtained from the manufacture of automobile Engine Parts as a cement replacement material in concrete production
Journal of Cleaner Production, 2018Co-Authors: Natt Makul, Gritsada SuaiamAbstract:Abstract Automobile Engine Parts foundry sand waste (ASW) is primarily a by-product of the Engine part casting process used by automobile industries. In this study, the recycling and reuse of ASW in concrete production were investigated. A preliminary investigation indicated that ASW has chemical composition according to American Society for Testing and Materials (ASTM) C618. Its total content of SiO2, Al2O3, and Fe2O3 was 93.95%, and its strength activity index was more than 75% of that of the control mortar at 7 and 28 days, indicating that ASW can be used as a supplementary cementitious material in concrete. Ordinary Portland cement (OPC) was replaced with 0, 10, 20, 30, or 40 wt% ASW. Fresh concrete properties, including water requirement, slump test, slump loss, unit weight and setting time, were studied in addition to the materials’ compressive strength, tensile strength, and modulus of elasticity. Moreover, sulfate expansion after up to 154 days of immersion in a 5% sodium sulfate (Na2SO4) solution and mass loss under sulfuric (H2SO4) attack were analyzed. The tested concrete samples were normal concrete consisting of a water-reducing admixture and total binder materials at 300 and 400 kg/m3 with desired initial slumps of 5 ± 0.5, 10 ± 0.5 and 15 ± 0.5 cm. The test results indicated that the addition of ASW as a partial cement replacement resulted in lower unit weight, compressive and splitting tensile strength, and modulus of elasticity and higher water requirement, slump loss, setting time and resistance to sulfuric acid attack than were observed in conventional concrete. In the sodium sulfate solution, the linear expansion of the concrete mixtures decreased as ASW content increased and total binder materials decreased. These findings suggest that ASW could potentially replace OPC. However, to obtain a 28-day compressive strength of 27–33 MPa at initial slumps up to 10 ± 0.5 cm, the replacement should not exceed 30 wt%.
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Effects of Foundry Sand Powder (Green Sand Molding Waste (GSW)) from Engine Parts Casting Upon Mechanical Properties of Concrete
2008Co-Authors: Natt Makul, Burachat ChatveeraAbstract:A group of foundry sand powder, green sand and molding waste (here-in-after referred to as GSW)was main by-products from Engine Parts casting process in which their status were transformed by heatingto high temperature close to 1400 °c in the formation process. It has potential to be utilized to partiallyreplace fine aggregate. Therefore, the objective of this research was to study the chemical compositionsand physical properties of foundry sand. The studied properties of fresh concrete were unit weight, waterrequirement, slump loss, and setting time. Also, mechanical properties such as compressive strength andsplitting tensile strength were investigated. The contents of ordinary Portland cement Type I (300, 350, and400 kg/m3), initial slumps of concrete (5 ± 0.5, 10 ± 0.5, and 15 ± 0.5 centimeters), and percentagereplacements (0, 5, 10, and 15% by weight) of the GSW foundry sand in fine aggregate (river sand) werevaried. From test results, it was found that the increase of GSW proportions from 0 (normal concrete) to 5,10, and 15% by weight respectively, increased unit weight, water requirement of concrete at the specifiedslump, slump loss, and setting time. Whereas, the compressive and splitting tensile strengths of theconcrete decreased. Furthermore, it was found that the GSW foundry sand can be used to replace the riversand up to 15% by weight, depending on the specified compressive strength of concrete.
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Effects of Foundry Sand Powder from Engine Parts Casting on Ready-Mixed Concrete Properties
2006Co-Authors: Natt Makul, Burachat ChatveeraAbstract:The objective of this research was to study the properties of ready-mixed concrete containingfoundry sand powder, which is a main by-product from Engine Parts casting process. The propertiesinvestigated included chemical composition and physical properties. The fresh concrete propertiestested were water requirement of concrete, slump loss, unit weight, setting time, and compressivestrength was performed. The types and mix proportions of ready-mixed concrete tested were normalconcrete without chemical admixtures, with ordinary Portland cement type I contents of 300, 350,and 400 kg/m3, initial slump of 5 ± 0.5, 10 ± 0.5, and 15 ± 0.5 cm, and percentage replacementsof SSW foundry sand by weight of ordinary Portland cement type I (0, 10, 20, 30, and 40%). The test results found that the water requirement of concrete containing foundry sandincreased not more than 1.1% whereas, the unit weight decreased 0.1 - 1.6% when compared withthe normal concrete. The slump loss and setting time increased when compared with normalconcrete. Whereas, the early age compressive strength decreased. However, the rates of long termcompressive strength development of SSW concrete was higher than those of the normal concrete.
A.d. Rekin - One of the best experts on this subject based on the ideXlab platform.
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Investigations of thermomechanical fatigue for optimization of design and production process solutions for gas-turbine Engine Parts
International Journal of Fatigue, 2008Co-Authors: N.g. Bychkov, V.p. Lukash, Y.a. Nozhnitsky, A.v. Perchin, A.d. RekinAbstract:A technique for thermomechanical fatigue of gas-turbine Engine Parts is discussed. It is shown that induction heating at a frequency of about 400 kHz is suitable for tests of Parts with thermal barrier coatings (TBC). For thermocyclic tests at conditions when the radiant component of total thermal flow is significant, a rig with gas-flame heating has been developed. Some results of the tests are presented.
Li Min - One of the best experts on this subject based on the ideXlab platform.
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Sound Radiation Efficiency of Engine Parts(I)——Theory and Experiment Scheme
Journal of Tianjin University, 2007Co-Authors: Li MinAbstract:Sound radiation efficiency(SRE) is brought forward from the relationship between sound and vibration.Then the discrete calculation method(DCM) which is applied to regular components is presented to some complex components of Engine cover Parts,and the proposed method is a hybrid method comprising both vibration measurement and calculation of radiation impedance.Furthermore,the proposed method does not require the measurement of sound fields,thus provide a high precision.Finally,DCM as a measurement method for sound radiation is verified by performing measurements of Engine Parts.The SRE results are approached to the reality of object because the measurement needn′t measure sound fields.The above achievements can be used not only in surface velocity method,but also in sound radiation prediction.
Gritsada Suaiam - One of the best experts on this subject based on the ideXlab platform.
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innovative utilization of foundry sand waste obtained from the manufacture of automobile Engine Parts as a cement replacement material in concrete production
Journal of Cleaner Production, 2018Co-Authors: Natt Makul, Gritsada SuaiamAbstract:Abstract Automobile Engine Parts foundry sand waste (ASW) is primarily a by-product of the Engine part casting process used by automobile industries. In this study, the recycling and reuse of ASW in concrete production were investigated. A preliminary investigation indicated that ASW has chemical composition according to American Society for Testing and Materials (ASTM) C618. Its total content of SiO2, Al2O3, and Fe2O3 was 93.95%, and its strength activity index was more than 75% of that of the control mortar at 7 and 28 days, indicating that ASW can be used as a supplementary cementitious material in concrete. Ordinary Portland cement (OPC) was replaced with 0, 10, 20, 30, or 40 wt% ASW. Fresh concrete properties, including water requirement, slump test, slump loss, unit weight and setting time, were studied in addition to the materials’ compressive strength, tensile strength, and modulus of elasticity. Moreover, sulfate expansion after up to 154 days of immersion in a 5% sodium sulfate (Na2SO4) solution and mass loss under sulfuric (H2SO4) attack were analyzed. The tested concrete samples were normal concrete consisting of a water-reducing admixture and total binder materials at 300 and 400 kg/m3 with desired initial slumps of 5 ± 0.5, 10 ± 0.5 and 15 ± 0.5 cm. The test results indicated that the addition of ASW as a partial cement replacement resulted in lower unit weight, compressive and splitting tensile strength, and modulus of elasticity and higher water requirement, slump loss, setting time and resistance to sulfuric acid attack than were observed in conventional concrete. In the sodium sulfate solution, the linear expansion of the concrete mixtures decreased as ASW content increased and total binder materials decreased. These findings suggest that ASW could potentially replace OPC. However, to obtain a 28-day compressive strength of 27–33 MPa at initial slumps up to 10 ± 0.5 cm, the replacement should not exceed 30 wt%.
Shigeyuki Sōmiya - One of the best experts on this subject based on the ideXlab platform.
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Hydrothermal corrosion of nitride and carbide of silicon
Materials Chemistry and Physics, 2000Co-Authors: Shigeyuki SōmiyaAbstract:Abstract Silicon nitride (Si 3 N 4 ) and carbide (SiC) are getting applied to Engine Parts in Japan. We have to estimate the life of these Parts whenever we use them for Engine applications. After burning of fuel in the air we get water vapour. Therefore, reactions between Si 3 N 4 and/or SiC and water vapour are important for application for Engine Parts. The author presents a review on this topic.