TH12663U - The process of manufacturing ready-mixed concrete for use in cold storage. - Google Patents

Abstract

Revised 5/10/59. The process of producing ready-mixed concrete for cold storage begins with preparing the concrete mixer. Weigh in the largest aggregate sizes (19.0 and 6.0 mm) and place them in the mixer. Then, start the mixer at 18 revolutions per minute to mix the aggregate, sand, and cement thoroughly for 1 minute. Next, weigh in and add fly ash while continuously mixing for 30 seconds. Once well mixed, add water, filling 3/4 of the total volume. During the water addition process, continue mixing for 30 seconds to ensure the water is thoroughly incorporated into the sand, aggregate, and cement. Then, add the strong concrete admixture to the remaining water while continuing to mix the admixture for 15 seconds. Finally, add the cold storage-specific admixture and mix the concrete for another 30 seconds. This completes the ready-mixed concrete for cold storage. The process of producing ready-mixed concrete for cold storage begins with preparing the concrete mixer. Weigh the largest aggregate sizes (19.0 and 6.0 mm) and place them in the mixer. Then, start the mixer at 18 revolutions per minute to thoroughly mix the aggregate, sand, and cement for 1 minute. Next, weigh and add fly ash, and continue mixing for 30 seconds. Once well mixed, add water, filling 3/4 of the total volume. During the water addition process, continue mixing for 30 seconds to ensure the water is thoroughly incorporated into the sand, aggregate, and cement. Next, add the strong concrete admixture to the remaining water, continuing to mix the admixture for 15 seconds. Finally, add the cold storage-specific admixture and continue mixing for another 30 seconds. This completes the ready-mixed concrete suitable for cold storage.

Claims (2)

Revised 5/10/59 1. The process for producing ready-mixed concrete for use in cold storage is as follows: a. Prepare a concrete mixer with a clean interior and a moist (not completely dry) interior surface. The aggregate (stone and sand) should be saturated and have a saturated surface dry condition. b. Weigh 820 kg/m³ of stone (maximum size 19.0 mm) and 281 kg/m³ of stone (maximum size 6.0 mm), and 309 kg/m³ of cement. Place these into the concrete mixer and start the mixer at 18 revolutions per minute to thoroughly mix the stone, sand, and cement for 1 minute. Then, weigh and add 54 kg/m³ of fly ash and continue mixing for 30 seconds. c. Once the cement, fly ash, sand, and stone are well mixed, add 3/4 of the total water volume, or 80 kg/m³. Continue mixing while the water is being added. 3. Mix the concrete to allow the added water to mix thoroughly for 30 seconds. 4. Once the added water is well mixed with the sand, aggregate, and cement, begin adding the strong concrete admixture at a rate of 1.54 liters per cubic meter of concrete, mixing it with the remaining concrete mix water (26 kilograms per cubic meter of concrete). Turn on the concrete mixer to allow the admixture to mix thoroughly with the concrete mixture for 15 seconds. Then add the cold storage admixture at a rate of 0.56 liters. Mix the concrete again for 30 seconds. This completes the ready-mixed concrete suitable for cold storage. 2. Ready-mixed concrete suitable for cold storage according to claim 1, where the concrete mix proportions are as follows: Cement content = 309 kg/m³; Fly ash content = 54 kg/m³; Concrete mix water content = 106 kg/m³; Sand content = 855 kg/m³; Maximum aggregate size 19.0 mm = 820 kg/m³; Maximum aggregate size 6.0 mm = 281 kg/m³. The amount of strong concrete admixture is 1.54 liters per cubic meter. The amount of cold storage admixture is 0.56 liters per cubic meter. ............................................................................................................................................................ 1. The process for producing ready-mixed concrete for use in cold storage is as follows: a. Prepare a concrete mixer with a clean interior and a moist (not completely dry) inner surface. The aggregate (stone and sand) must be saturated with water and have a saturated surface dry condition. b. Weigh 820 kg/m³ of stone (maximum size 19.0 mm) and 281 kg/m³ of stone (maximum size 6.0 mm), and 309 kg/m³ of cement. Place these into the concrete mixer and start the mixer at 18 revolutions per minute to thoroughly mix the stone, sand, and cement for 1 minute. Then, weigh and add 54 kg/m³ of fly ash and continue mixing for 30 seconds. c. Once the cement, fly ash, sand, and stone are well mixed, add 3/4 of the total water volume, or 80 kg/m³. Continue adding the water while the concrete mixer is running. d. Once the added water is well mixed with the sand, aggregate, and cement, begin adding the strong concrete admixture at a rate of 1.54 liters per cubic meter, mixing it with the remaining concrete mix (26 kilograms per cubic meter). Turn on the concrete mixer to allow the admixture to mix thoroughly with the concrete mixture for 15 seconds. Then add 0.56 liters of the cold storage admixture and mix the concrete for another 30 seconds. This completes the ready-mixed concrete suitable for cold storage. 2. The process for producing ready-mixed concrete for use in cold storage, as per claim 1, where the concrete mix proportions are as follows: Cement content = 309 kg/m³; Fly ash content = 54 kg/m³; Water content = 106 kg/m³; Sand content = 855 kg/m³; Maximum aggregate (19.0 mm) content = 820 kg/m³; Maximum aggregate (6.0 mm) content = 281 kg/m³; Strong concrete admixture content = 1.54 liters/m³; Cold storage admixture content = 0.56 liters/m³.