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Method for producing a gelling composition

A gelling composition and a technology for the composition, which can be applied to ceramic products, bandages, other household appliances, etc., can solve the problems of high cost and high transportation costs, and achieve the effects of saving economic costs, saving cement, and high compressive strength

Active Publication Date: 2017-12-08
CONSTR RES & TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Swellable polymeric The admixture microspheres provided to the gelled composition are expensive

Method used

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  • Method for producing a gelling composition
  • Method for producing a gelling composition
  • Method for producing a gelling composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A gelled composition is prepared in a central mixer in a gelled composition facility. The cementitious composition included 1833 lbs of cement, 3900 lbs (1770 kg) of sand, 3171 lbs (1438 kg) of #57 stone, 2154 lbs (977 kg) of #8 stone and 917 lbs (416 kg) of water. The volume of the gelled composition is about 3yd 3 (2.3m 3 ). The gelling composition consists of 2713mL of 80 water reducing admixture (available from BASF Construction Chemicals, Cleveland, Ohio), 3798mL 7500 High Range Selenium Water Reducer Admixture (also available from BASF Construction Chemicals), and 814 mL Tributyl Phosphate Antifoam Admixture. After mixing in the central mixer, the cementitious composition is transferred to a concrete mixer truck.

[0049] Once the cementitious composition is added to the concrete mixer truck, it will account for 2% by volume of the cementitious composition, and the density expanded by the method of the present invention is about 0.025g / cm 3 , expanded poly...

Embodiment 2

[0052] A gelled composition is prepared in a central mixer in a gelled composition facility. The cementitious composition included 760 lbs of water, 1690 lbs (767 kg) of cement, 4020 lbs (1820 kg) of sand, 3020 lbs (1375 kg) of #57 stone, and 2000 lbs (910 kg) of #8 stone. The volume of the gelled composition is about 3yd 3 (2.3m 3 ). The gelling composition also includes 1501mL of 7500 High Range Water Reducer Admixture and 750 mL Tributyl Phosphate (“TBP”) Antifoam Admixture.

[0053] The density of 1.5% by volume of the gelled composition expanded by the method of the present invention is about 0.025 g / cm before the other ingredients are added to the central mixer 3 The expanded polymeric microspheres, approximately 40 μm in size, were added manually in the form of an aqueous slurry to a central mixer. TBP was manually added to the central mixture containing the expanded polymer microspheres. After the addition of the expanded polymeric microspheres and TBP, the othe...

Embodiment 3

[0056] A gelled composition is prepared in a central mixer in a gelled composition facility. The cementitious composition included 1520 lbs of water, 3380 lbs (1530 kg) of cement, 8040 lbs (3650 kg) of sand, 6040 lbs (2740 kg) of #57 stone, and 4000 lbs (1810 kg) of #8 stone. The volume of the gelled composition is about 6yd 3 . The gelling composition also includes 4002mL of 7500 high range water reducing admixture and 1501mL tributyl phosphate antifoam admixture.

[0057] 1.5% by volume of the gelled composition will have a density of about 0.025 g / cm expanded by the process of the present invention before the other ingredients are added to the central mixer 3 The expanded polymeric microspheres, approximately 40 μm in size, were added manually in the form of an aqueous slurry to a central mixer. TBP was manually added to the central mixture containing the expanded polymer microspheres. After the addition of the expanded polymeric microspheres and TBP, the other ingred...

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Abstract

A method of expanding expandable polymeric microspheres comprising contacting an aqueous slurry comprising unexpanded expandable polymeric microspheres with steam in situ during the production of a gelled composition or article, wherein the aqueous slurry Optionally, an admixture for the gelled composition is also included. A method of producing a gelled composition or article, comprising: (i) contacting an aqueous slurry of unexpanded expandable polymeric microspheres with steam before and / or during said production of the gelled composition to form expanded polymer microspheres; (ii) pre-wet expanded polymer microspheres; and (iii) mixing pre-wet expanded polymer microspheres with cement and water to form a cementitious composition, wherein the aqueous slurry is optionally Optionally also includes an admixture for the gelled composition.

Description

technical field [0001] The present invention provides a method of expanding expandable polymer microspheres and a method of preparing a cementitious material comprising expanding expandable polymer microspheres and making The expanded, expandable polymer microspheres are mixed with cement and water to form a cementitious composition. Background technique [0002] Freeze-thaw cycles can severely damage water-saturated hardened cementitious compositions, such as concrete. The best known technique to prevent or reduce the occurrence of this damage is to incorporate microscopic fine pores or voids in the composition. The pores or pores act as internal expansion chambers, thereby protecting the composition from freeze-thaw damage by reducing hydraulic pressure changes caused by freeze-thaw cycles. The traditional method used to create such porosity in gelled compositions is by introducing an air-entraining agent into the composition to stabilize the microscopic air bubbles that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B38/08
CPCC04B28/02C04B38/085C04B2111/29C04B40/0039C08L101/14Y02W30/91C04B16/08C04B20/002C04B20/0024C04B16/04C04B20/0084C04B2103/0051C04B24/2647C08L23/20C08L27/06C08L27/08A61L15/60C04B40/00C04B38/08C04B16/085C04B38/10C04B2111/40
Inventor F·S·翁J·C·史密斯D·甘巴泰萨R·菲特R·帕波内蒂S·米西格M·A·布里
Owner CONSTR RES & TECH GMBH