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A kind of multifunctional concrete synergist and preparation method thereof

A concrete synergist and multifunctional technology, applied in the field of concrete admixtures, can solve problems such as difficulty in obtaining raw materials, poor environmental performance of the final product in the preparation process, and environmental pollution, and achieve social and economic benefits of energy saving and consumption reduction. Superposition effect, the effect of improving overall performance

Active Publication Date: 2017-01-11
江苏雨泉混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many cement synergists are currently used, there are few concrete synergists specially used in concrete, and the existing concrete synergists mostly use polyether macromonomers as raw materials, and it is difficult to obtain raw materials. The environmental protection performance of the product is poor, and it is easy to cause environmental pollution, which runs counter to the construction of a resource-saving and environment-friendly society

Method used

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  • A kind of multifunctional concrete synergist and preparation method thereof
  • A kind of multifunctional concrete synergist and preparation method thereof
  • A kind of multifunctional concrete synergist and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The content of each component required for the reaction is as shown in Table 1, wherein the starch is a mixture of corn starch and wheat starch, the mass ratio is 1:1, the alkyl etherification agent is ethylene oxide, and the pH regulator is hydrogenated The mixture of sodium and potassium hydroxide, the mass ratio is 4:1, the unsaturated acid is maleic acid used in the preparation of esterification product 1 and preparation product 2, and its percentages are respectively 0.48wt% and 0.22wt% , The initiator is a mixture of sodium persulfate and ammonium persulfate, the mass ratio is 2:1.

[0033] Concrete preparation process steps and parameters are as follows:

[0034] (1) Add starch and water to the reactor first, stir until it is completely dissolved, configure sodium hydroxide and potassium hydroxide into a solution with a content of 5.00%, add it to the above reaction system and adjust the pH value of the system to 12 , and then add ethylene oxide to the reaction ...

Embodiment 2

[0038] The content of each component required for the reaction is as shown in Table 1, wherein the starch is tapioca starch, the alkyl etherification agent is ethylene oxide, the pH regulator sodium hydroxide, and the unsaturated acid is prepared in the esterification product 1 and When preparing the product 2, acrylic acid and maleic acid were used respectively, and their percentages were 0.14 wt% and 0.29 wt%, respectively, and the initiator was potassium persulfate.

[0039] Concrete preparation process steps and parameters are as follows:

[0040] (1) Add tapioca starch and water to the reactor first, stir until it is completely dissolved, configure sodium hydroxide into a solution with a content of 10.00%, add it to the above reaction system and adjust the pH value of the system to 11, and then proceed to the reaction Ethylene oxide was added into the system, and the etherification reaction was carried out at 40°C for 14.0h.

[0041] (2) Preparation of esterification pro...

Embodiment 3

[0044] The content of each component required for the reaction is as shown in Table 1, wherein the starch is cornstarch, the alkyl etherification agent is a mixture of propylene oxide and ethylene oxide, the mass ratio is 1:1, and the pH regulator hydrogen Sodium oxide, unsaturated acid is to use the mixture of acrylic acid, maleic anhydride respectively when preparing esterification product 1 and preparation product 2, and mass ratio is the mixture of 36:49 and acrylic acid, maleic acid, and mass ratio is 18: 29. The percentages are 0.286wt% and 0.188wt%, respectively. The initiator is a mixture of sodium persulfate, potassium persulfate and ammonium persulfate, and the mass ratio is 1:1:1.

[0045] (1) Add cornstarch and water in the reactor, stir until it dissolves completely, configure sodium hydroxide and water into a solution with a content of 10.00%, add it to the above reaction system and adjust the pH value of the system to 11.5, and then Propylene oxide and ethylene ...

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Abstract

The invention discloses multifunctional concrete synergist and a preparation method thereof. The multifunctional concrete synergist is mainly prepared by the followings steps: performing the etherification reaction on starch and an alkyl etherifying agent at 30-70 DEG C for 8.0-18.0 hours to obtain a starch-based alkyl etherification product; performing the etherification reaction on the starch-based alkyl etherification product with unsaturated acid and triethanolamine to obtain an esterification product 1; performing the etherification reaction on unsaturated acid and triisopropanolamine to obtain an esterification product 2; performing grafting reaction on the esterification product 1 and the esterification product 2 in a reaction kettle at 50-90 DEG C for 1.0-4.0 h. The density of the multifunctional concrete synergist is 1.005+ / -0.020, the pH value of the multifunctional concrete synergist is 10.0+ / -1.0, the chlorine ion content of the multifunctional concrete synergist is less than or equal to 0.30%, the sulfate ion content of the multifunctional concrete synergist is less than or equal to 1.00%, and the alkali content of the multifunctional concrete synergist is less than or equal to 1.00%. The multifunctional concrete synergist is mainly used for improving the peaceability of concrete, reducing bleeding and pumping resistance and improving the comprehensive property of concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a multifunctional concrete synergist and a preparation method thereof. Background technique [0002] Concrete has become the most widely used material in the world due to its excellent plasticity, good water resistance, excellent durability and very competitive economy. In the next few decades, it will still be one of the most important engineering structural materials, especially for contemporary China, which is in a transitional period. Since the infrastructure scale is higher than the world average, the importance of concrete is self-evident. Under the background of building a resource-saving and environment-friendly society, the concrete industry is bound to develop in the direction of low-carbon and green environmental protection. In a conventional environment, nearly 20% of the cement in concrete is not fully hydrated, and only plays a filling role, cannot be e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B24/20C04B24/12
Inventor 陈珍喜郑福尔刘剑锋茅勰刘明华王伟锋
Owner 江苏雨泉混凝土有限公司
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