TH15336U - The process of manufacturing ready-mixed concrete with sand dust for external formwork. - Google Patents

Abstract

------16/08/2018------(OCR) Page 1 of 1. Summary of the Invention: A process for producing ready-mixed concrete mixed with outer core sand dust. In this case, the outer core sand dust must have specific chemical composition and physical properties to be used as a substitute for sand in the production of ready-mixed concrete. The production process involves preparing a clean concrete mixer, weighing the aggregate, cement, and outer core sand dust and placing them into the mixer. The mixer is then started to mix the aggregate, core sand dust, and cement thoroughly. Once the cement, core sand dust, and aggregate are well mixed, clean water is added. During the water addition process, the concrete mixer is kept running to ensure the water is thoroughly mixed with the outer core sand dust and cement mixture. Then, concrete admixtures are added while the mixer is running again to ensure they are thoroughly mixed with the concrete mixture. The process is complete, resulting in ready-mixed concrete mixed with outer core sand dust. ------------ Edited 3/11/2016. A process for producing ready-mixed concrete mixed with outer core sand dust. In this case, the outer core sand dust... Specific chemical composition and physical properties are required for use as a substitute for sand in ready-mixed concrete production. The production process begins with preparing a clean concrete mixer. The aggregate, cement, and outer core sand dust are weighed and placed into the mixer. The mixer is then started to mix the aggregate, core sand dust, and cement thoroughly. Once the cement, core sand dust, and aggregate are well mixed, clean water is added. During the water addition process, the mixer is kept running to ensure the water is thoroughly mixed with the outer core sand dust and cement mixture. Then, concrete admixtures are added while the mixer is running again to ensure they are well mixed with the concrete mixture. This completes the process of producing ready-mixed concrete with outer core sand dust. The formwork dust, sand, and cement are mixed thoroughly. Once the cement, formwork dust, sand, and aggregate are well mixed, add all the clean water. While adding the water, operate the concrete mixer to ensure the water mixes well with the outer formwork dust and cement mixture. Then, begin adding the concrete admixture while continuing to operate the mixer to ensure it is thoroughly mixed with the concrete mixture. This completes the ready-mixed concrete with outer formwork dust.

Claims (3)

------16/08/2561------(OCR) Page 1 of 1 page. Claims 1. The process for producing ready-mixed concrete with outer formwork sand and dust involves the following steps: a. Prepare a concrete mixer with a clean interior and a moist (not completely dry) inner surface, and aggregate (stone and sand) that is saturated with water and has a saturated surface dry condition. b. Weigh 1165 kg/m³ of stone, 325 kg/m³ of cement, and 860 kg/m³ of Green Sand and Molding Waste (GSW) per cubic meter of concrete. Add these to the concrete mixer and start the mixer at a speed of 30 revolutions per minute to mix the stone, sand, and cement thoroughly for 1 minute and 30 seconds. c. Once the cement, sand, and stone are well mixed, Therefore, add all clean water. During water addition, turn on the concrete mixer to allow the added water to be thoroughly mixed with the formwork sand dust, aggregate, and cement mixture for 30 seconds. d. Once the added water is thoroughly mixed with the formwork sand dust, aggregate, and cement, begin adding the concrete admixture at a rate of 1.95 liters per cubic meter of concrete. Turn on the concrete mixer again to allow the added admixture to be thoroughly mixed with the concrete mixture for 30 seconds. This completes the process of producing ready-mixed concrete with external formwork sand dust. 2. The production process of ready-mixed concrete with external formwork sand dust according to claim 1, where the external formwork sand dust, Green Sand and Molding Waste (GSW) has a main composition of silicon dioxide (SiO2) 73.88%, potassium oxide (K2O) 0.51%, calcium oxide (CaO) 1.25%, iron oxide (Fe2O3) 4.33%, and has a percentage loss value... The weight due to combustion is 1.57%, while the physical properties include particle size, with a percentage retained on 38 µm sieve of 56.80% and on 90 µm sieve of 28.40%; specific surface area of 70.8 m²/kg; specific gravity of 2.58; and moisture content of 0.21%. 3. Ready-mixed concrete with external formwork dust as per claim 1 or 2, where the concrete mix formula is detailed as follows: cement content = 325 kg/m³; clean water content = 132 kg/m³; Green Sand and Molding Waste (GSW) content = 860 kg/m³; maximum aggregate size (19.0 mm) content = 1165 kg/m³; and concrete admixture content according to ASTM C 494, Standard Specification for Chemical Admixtures. Additives for concrete work (ASTM C 494: Standard Specification for Chemical Admixtures for Concrete) with a dissolved solids content of 40% by weight, type A & D, at 1.95 liters per cubic meter of concrete. ------------ July 12, 2017 1. The process for producing ready-mixed concrete with green sand and molding waste (GSW) for external formwork involves the following steps: a. Prepare a concrete mixer with a clean interior and a moist (not completely dry) interior surface, and aggregate (stone and sand) that is saturated with water and has a saturated surface dry condition. b. Weigh 1165 kg/m³ of stone, 325 kg/m³ of cement, and 860 kg/m³ of Green Sand and Molding Waste (GSW) for external formwork. Add these to the concrete mixer, then start the machine at 30 revolutions per minute to mix the stone and molding waste. A. Mix the cement and aggregate thoroughly in a mixer for 1 minute and 30 seconds. C. Once the cement, sand, core dust, and aggregate are well mixed, add all the clean water. During the water addition, operate the concrete mixer to allow the added water to mix well with the sand, core dust, and cement mixture for 30 seconds. D. Once the added water is well mixed with the sand, core dust, aggregate, and cement, begin adding the concrete admixture at a rate of 1.95 liters per cubic meter of concrete. Operate the concrete mixer to allow the added admixture to mix well with the concrete mixture for 30 seconds. This completes the ready-mixed concrete with external sand and core dust production. 2. The process for producing ready-mixed concrete with external sand and core dust according to claim 1, where sand and core dust... The outer formwork core Green Sand and Molding Waste (GSW) has a main composition of silicon dioxide (SiO2) 73.88%, potassium oxide (K2O) 0.51%, calcium oxide (CaO) 1.25%, iron oxide (Fe2O3) 4.33%, and a weight loss due to combustion of 1.57%. Its physical properties include a particle size of 56.80% retained on 38 µm sieves and 28.40% retained on 90 µm sieves, a specific surface area of 70.8 m²/kg, a specific gravity of 2.58, and a moisture content of 0.21%. 3. Ready-mixed concrete containing the outer formwork core sand dust as per claim 1 or 2, where the concrete mix formula is detailed as follows: cement content = 325 kg/m³, clean water content = 132 kg/m³. The amount of Green Sand and Molding Waste (GSW) for the outer formwork core is 860 kilograms per cubic meter of concrete. The amount of aggregate with a maximum size of 19.0 millimeters is 1165 kilograms per cubic meter of concrete. The amount of concrete admixture according to ASTM C 494: Standard Specification for Chemical Admixtures for Concrete, with a dissolved solids content of 40% by weight, type A & D, is 1.95 liters per cubic meter of concrete. ----------------------------------------------------------------------------------------------------------------------------------- Revised 3/11/2016 1. The ready-mixed concrete production process with Green Sand and Molding Waste (GSW) for the outer formwork core is as follows: a. Prepare a concrete mixer with a clean interior and a moist (not completely dry) inner surface, and aggregate (stone and sand) that is saturated with water and has a saturated surface dry condition. b. Weigh the stone in an amount equal to 1165 kilograms per cubic meter of concrete. The following steps outline the concrete mixing process: A. Add 325 kg of cement per cubic meter of concrete and 860 kg of Green Sand and Molding Waste (GSW) per cubic meter of concrete to the mixer. The mixer is then started at 30 rpm to thoroughly mix the aggregate, sand, and cement for 1 minute and 30 seconds. B. Once the cement, sand, and aggregate are well mixed, add all the clean water. During the water addition process, continue mixing for 30 seconds to ensure the water is evenly mixed with the aggregate and cement mixture. C. After the water is thoroughly mixed with the aggregate and cement, add the admixture at a rate of 1.95 liters per cubic meter of concrete. Continue mixing for 30 seconds to ensure the admixture is fully incorporated into the concrete mixture. The concrete is then ready. 2. The ready-mixed concrete production process under claim 1, which includes Green Sand and Molding Waste (GSW) with a main composition of 73.88% silicon dioxide (SiO2), 0.51% potassium oxide (K2O), 1.25% calcium oxide (CaO), and 4.33% iron oxide (Fe2O3), and a weight loss due to combustion of 1.57%, while having physical properties including a particle size retained on a 38 µm sieve of 56.80% and on a 90 µm sieve of 28.40%, and a specific surface area of 70.8 m²/kg. Specific gravity = 2.58, moisture content 0.21%. 3. Ready-mixed concrete production process with external formwork sand dust according to claim 1 or 2, where the concrete mix formula is detailed as follows: Cement content = 325 kg/m³ concrete; Clean water content = 132 kg/m³ concrete; Green Sand and Molding Waste (GSW) content = 860 kg/m³ concrete; Maximum aggregate size 19.0 mm = 1165 kg/m³ concrete; Concrete admixture content according to ASTM C 494: Standard Specification for Chemical Admixtures for Concrete, with dissolved solids content in the admixture equal to 43.5% by weight, type A&D = 1.95 liters/m³ concrete. 1. The process for producing concrete mixed with outer core dust for formwork involves the following steps: a. Prepare a concrete mixer with a clean interior and a moist (not completely dry) inner surface. The aggregate (stone and sand) should be saturated with water and have a saturated surface dry condition. b. Weigh 1165 kg/m³ of stone, 325 kg/m³ of cement, and 860 kg/m³ of GSW outer core dust for formwork. Place these ingredients into the concrete mixer and start the mixer at 30 rpm for 1 minute and 30 seconds to thoroughly mix the stone, core dust, and cement. c. Once the cement, core dust, and stone are well mixed, add all the clean water. During the water addition process, continue operating the concrete mixer for 30 seconds to ensure the added water is thoroughly mixed with the core dust, stone, and cement mixture. d. Once the added water is thoroughly mixed with the core dust, stone, and cement, the process is complete. Then, add the concrete admixture at a rate of 1.95 liters per cubic meter of concrete, while turning on the concrete mixer to allow the admixture to mix thoroughly with the concrete mixture for 30 seconds. This completes the process, resulting in ready-mixed concrete with sand and dust for the outer formwork. 2. The ready-mixed concrete production process for the outer core sand dust as per claim 1, where the GSW inner core sand dust has a main composition of silicon dioxide (SiO2) 73.88%, potassium oxide (K2O) 0.51%, calcium oxide (CaO) 1.25%, iron oxide (Fe2O3) 4.33%, and a combustion loss of 1.57%, while having physical properties including particle size retention percentage of 38 µm sieve = 56.80% and retention percentage of 90 µm sieve = 28.40%, specific surface area = 70.8 m²/kg, specific gravity = 2.58, and moisture content = 0.21%. 3. The ready-mixed concrete production process with external formwork sand dust as per either claim 1 or 2, where the concrete mix formula is detailed as follows: cement content = 325 kg/m³; clean water content = 132 kg/m³; external formwork sand dust (GSW) content = 860 kg/m³; maximum aggregate size (19.0 mm) content = 1165 kg/m³; and concrete admixture types A & D content = 1.95 liters/m³.