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concrete retarder

A retarder, concrete technology, applied in the field of concrete retarder, can solve the problems of unsatisfactory concrete strength, air pollution, etc., to achieve the effect of improving the retarding effect, improving the adsorption performance, and increasing the specific surface area

Active Publication Date: 2018-10-30
GUILIN HUAYUE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can obtain a strong retarding effect, it is still unsatisfactory in terms of concrete application, especially in terms of concrete strength.
In addition, the use of nitrate is prone to produce NO 2 Pollutants such as air pollution

Method used

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Examples

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Effect test

Embodiment 1

[0038] A concrete retarder, made of the following components in proportion by weight: 3 parts of ammonium borate, 5 parts of sodium pyrophosphate, 6 parts of magnesium sulfate, 8 parts of diethylenetriaminepentamethylenephosphonic acid, carboxymethyl 5 parts of sodium cellulose, 3 parts of maltodextrin, 2 parts of sodium tartrate, 18 parts of palygorskite powder, 5 parts of water reducer, 2 parts of dispersant, and 0.7 part of surfactant.

Embodiment 2

[0040]A concrete retarder, made of the following components in proportion by weight: 5 parts of ammonium borate, 8 parts of sodium pyrophosphate, 9 parts of magnesium sulfate, 9 parts of diethylenetriaminepentamethylenephosphonic acid, carboxymethyl 6 parts of sodium cellulose, 4 parts of maltodextrin, 3 parts of sodium tartrate, 20 parts of palygorskite powder, 7 parts of water reducer, 3 parts of dispersant, and 0.8 part of surfactant.

Embodiment 3

[0042] A concrete retarder, made of the following components in proportion by weight: 2 parts of ammonium borate, 3 parts of sodium pyrophosphate, 4 parts of magnesium sulfate, 6 parts of diethylenetriaminepentamethylenephosphonic acid, carboxymethyl 3 parts of sodium cellulose, 1 part of maltodextrin, 1 part of sodium tartrate, 15 parts of palygorskite powder, 4 parts of water reducer, 1 part of dispersant, and 0.5 part of surfactant.

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Abstract

The invention disclsoes a novel concrete retarder. The novel concrete retarder is prepared from the following components in parts by weight: 2 to 5 parts of ammonium borate, 3 to 8 parts of sodium pyrophosphate, 4 to 9 parts of magnesium sulfate, 6 to 9 parts of diethylenetriaminepenta(methylenephosphonic) acid, 3 to 6 parts of sodium carboxymethyl cellulose, 1 to 4 parts of maltodextrin, 1 to 3 parts of sodium tartrate, 15 to 20 parts of palygorskite powder, 4 to 7 parts of a water reducing agent, 1 to 3 parts of a dispersant and 0.5 to 0.8 part of a surfactant. The novel concrete retarder provided by the invention has the advantages of excellent retarding effect, high strength, no pollution and the like, and is a concrete additive which has a very good development future.

Description

technical field [0001] The invention relates to a concrete retarder, which belongs to the technical field of concrete admixtures. Background technique [0002] Concrete admixture is a commonly used reagent in the concrete preparation process. It not only has a small dosage, but also can improve the performance of concrete to meet actual needs. At the same time, it can also save cement, reduce energy consumption and reduce pollutant emissions. Common admixtures are: early strength agent, water reducing agent, air-entraining agent, retarder, etc. Among them, retarder is a kind of heat release rate that can delay and reduce cement hydration, thereby prolonging the time for concrete to fully set, making fresh concrete maintain plasticity for a long time, convenient for pouring, and improving construction efficiency. An admixture that does not adversely affect the performance of the item. Therefore, retarders play an important role in the field of concrete. [0003] At present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B103/22
CPCC04B40/0039C04B2103/22C04B22/0013C04B22/16C04B22/142C04B24/121C04B24/383C04B24/38C04B24/06C04B14/102C04B2103/302C04B2103/408C04B2103/40
Inventor 陈威黄煌王恒尹丹阮长泰谢体云欧鹏
Owner GUILIN HUAYUE ENVIRONMENTAL PROTECTION TECH CO LTD
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