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High efficient slow coagulating retarder for concrete and cement

A technology of concrete and reinforcing agent, which is applied in the field of concrete admixtures and cement retarders for construction. It can solve the problems that it is not suitable for ordinary cement production needs, and there are not many researches on new cement retarders, so as to achieve huge economic and social benefits. , The effect of saving power consumption

Inactive Publication Date: 2005-08-24
申士富 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3) There are not many studies on new cement retarders at home and abroad
The invention (patent No. 97117808) of Sheng Tianda and Tian Hiroaki is to use polymers containing anionic groups (such as anhydride groups, carboxyl groups) and hydrophilic parts (such as polyoxyalkylene ether units) as cement retarders; The compound can be obtained by the copolymerization reaction of monomers including maleic anhydride and monomers including vinyl alkyl ethers, wherein in vinyl alkyl ether monomers, alkylene oxide is added to allyl alcohol; polymer It can be a copolymer with other monomers such as styrene for copolymerization; use this cement retarder to get patterns or flush decorative surfaces on concrete products; this cement retarder is suitable for coating on cement retarders ; The retarder uses organic compounds, after a complex chemical reaction, it is not suitable for the production needs of ordinary cement
The invention of Hui Chengyou and Jiao Dianqi (Patent No. 93107532) is to add a retarder to the fast-setting early-strength sulfur (iron) aluminate cement, adjust the setting time of the fast-setting early-strength cement according to the construction needs, and reduce the fast-setting early-strength Cement concrete is used in the construction of large-scale mechanized pumping method, which solves the technical difficulty that fast-setting early-strength cement concrete cannot be used by pumping method; this patented product is aimed at fast-setting early-strength sulfur (iron) aluminate cement, and is not suitable for use in Portland cement

Method used

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  • High efficient slow coagulating retarder for concrete and cement

Examples

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Effect test

example 1

[0028] Example 1: φ1.5 drum dryer, the added amount of desulfurization ash is 3.5t, and the air volume of the fan is 7000m 3 / h, the temperature of the modification chamber is 140℃, and the specific surface area of ​​the retarder enhancer is 1000m 2 / kg around, CaSO 4 ·2H 2 The O content is about 3.5%, the crystal is fibrous, the long diameter is about 1000 nm, and the short diameter is about 100 nm.

example 2

[0029] Example 2: φ1.5 drum dryer, adding amount of desulfurization ash is 4.0t, and air volume is 9000m 3 / h, the temperature of the modification chamber is 140℃, and the specific surface area of ​​the retarder enhancer is 830m 2 / kg around, CaSO 4 ·2H 2The O content is about 2.5%, the crystal is fibrous, the long diameter is about 1000 nm, and the short diameter is about 100 nm.

example 3

[0030] Example 3: φ1.5 drum dryer, the desulfurization ash adding amount is 5.0t, and the air volume is 9000m 3 / h, the temperature of the modification chamber is 140℃, and the specific surface area of ​​the retarder enhancer is 900m 2 / kg around, CaSO 4 ·2H 2 The O content is about 4.0%, the crystal is fibrous, the long diameter is about 1000 nm, and the short diameter is about 100 nm.

[0031] The specific method of invented product application:

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Abstract

An efficient setting retarder for concrete and cement is proportionally prepared from Ca(OH)2, CaCO3, CaSO3.0.5H2O, CaSO4.2H2O, SiO2, acid-insoluble substance and Cl ions, through storage, homogenizing and modifying. It has low cost.

Description

1. Technical field [0001] The invention belongs to the technical field of concrete admixtures and cement retarders for construction. 2. Background technology [0002] 1) There are relatively few researches on the application of semi-dry desulfurization ash at home and abroad. At present, no suitable industrial use has been found. Most of them are used as backfill and road base materials instead of clay. Qingdao Ocean University has studied the technology of reusing semi-dry desulfurization ash as a desulfurization agent; Finland’s Itampella Company has studied the method of manufacturing cement or concrete from desulfurization ash, which includes adding desulfurization ash to cement or concrete at the manufacturing stage. The fly ash contains lime and the product formed by the reaction of lime and sulfur dioxide in flue gas desulfurization. In order to avoid the adverse effects of calcium sulfite and inclusion reactions and increase the amount of fly ash containing desulfurizatio...

Claims

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Application Information

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IPC IPC(8): C04B22/06C04B22/08C04B22/14
Inventor 申士富崔焕亮
Owner 申士富
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