High-efficient water reducing agent

A high-efficiency water-reducing agent and vitamin technology, which is applied in the field of concrete admixtures, can solve the problems of complicated preparation steps and difficult process control of the water-reducing agent, and achieve the effects of easy acquisition, wide application and easy acquisition.

Inactive Publication Date: 2018-03-20
合肥华福土工合成材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current polycarboxylate-based water-reducers are incompatible with naphthalene-based water-reducers. If two types of water-reducers are used at the same time in a concrete mixing plant, the corresponding equipment needs to be thoroughly cleaned.
This defect of polycarboxylate superplasticizers has become a major obstacle to its large-scale promotion. If the compatibility problem with naphthalene superplasticizers can be solved, it will not only speed up the promotion of polycarboxylate superplasticizers, More compounding solutions can also be provided, not limited to the use of high-concentration naphthalene-based water-reducers or sulfamic acid-based water-reducers, and the existing water-reducers have cumbersome preparation steps and difficult process control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure 90Kg of polyethylene glycol monomethyl ether, 50Kg of maleic rosin, 25Kg of phthalic anhydride, and 10Kg of sodium p-styrenesulfonate into the reactor, add 50Kg of ultrapure water, and stir evenly; the temperature in the reactor is kept at 70°C, React for 3 hours; slowly add 1L of concentrated sulfuric acid dropwise to the reactor, then add and stir for 0.5 hours, keep warm for 30 minutes; take vitamin c15Kg, vitamin e5Kg, vitamin b15Kg, azobisisoheptanonitrile 10Kg, Add 25Kg of dimethyl ester and 25Kg of ammonium persulfate into ultrapure water, heat to 75°C to make solution A; slowly add solution A to the reaction kettle for 2.5 hours, stir evenly, add foaming agent to react for 12 minutes, and then add Antifoaming agent, react for 3 hours, cool to room temperature; adjust the pH of the material to 6.8-7.0 with sodium hydroxide solution to obtain a high-efficiency water reducer.

Embodiment 2

[0026] Measure 90Kg of polyethylene glycol monomethyl ether, 50Kg of maleic rosin, 25Kg of phthalic anhydride, and 10Kg of sodium p-styrenesulfonate into the reactor, add 50Kg of ultrapure water, and stir evenly; the temperature in the reactor is kept at 70°C, React for 3 hours; slowly add 1L of concentrated sulfuric acid dropwise to the reactor, then add and stir for 0.5 hours, keep warm for 30 minutes; take vitamin c15Kg, vitamin e5Kg, vitamin b15Kg, azobisisoheptanonitrile 10Kg, Add 25Kg of dimethyl ester and 25Kg of ammonium persulfate into ultrapure water, heat to 75°C to make solution A; slowly add solution A to the reaction kettle for 2.5 hours, stir evenly, add foaming agent to react for 12 minutes, and then add Modified silicone defoamer, react for 3 hours, cool to room temperature; use sodium hydroxide solution to adjust the pH of the material to 6.8-7.0 to obtain a high-efficiency water reducer.

[0027] Among them, the preparation method of the modified silicone de...

Embodiment 3

[0029] Measure 100Kg of polyethylene glycol monomethyl ether, 80Kg of maleic rosin, 35Kg of phthalic anhydride, and 13Kg of sodium p-styrenesulfonate into the reactor, add 120Kg of ultrapure water, and stir evenly; the temperature in the reactor is kept at 80°C, React for 4 hours; slowly add 1.5L concentrated sulfuric acid to the reaction kettle, stir while adding, take 1 hour, keep warm for 30 minutes; take 15Kg vitamin c, 5Kg vitamin e, 15Kg vitamin b, 10Kg azobisisoheptanonitrile, Add 25Kg of dimethyl ester and 25Kg of ammonium persulfate into ultrapure water, heat to 75°C to make solution A; slowly add solution A to the reaction kettle for 3 hours, stir evenly, add foaming agent to react for 30 minutes, and then add disinfectant Foaming agent, react for 3 hours, cool to room temperature; adjust the pH of the material to 6.8-7.0 with sodium hydroxide solution to obtain a high-efficiency water reducer.

[0030] Among them, the preparation method of the modified silicone defo...

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Abstract

The invention provides a high-efficiency water reducer, which relates to the technical field of concrete admixtures in building materials, including polyethylene glycol monomethyl ether, malein rosin, phthalic anhydride, sodium p-styrenesulfonate, concentrated sulfuric acid, and sodium hydroxide solution , vitamin c, vitamin e, vitamin b, azobisisoheptanonitrile, dimethyl azobisisobutyrate, ammonium persulfate, foaming agent, defoaming agent, ultrapure water. The present invention takes polyethylene glycol monomethyl ether and maleic rosin as main raw materials, vitamin C and vitamin E as reducing agents; azobisisoheptanonitrile, dimethyl azobisisobutyrate and ammonium persulfate as Initiator, adding modified silicone defoamer, the high-efficiency water reducer made of good stability, used in concrete, can increase its workability, and this water reducer can be mixed with other water reducers to make The process is simple, the cost is low, and the practicability is high.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures in building materials, in particular to a high-efficiency water reducer. Background technique [0002] With the rise of my country's nuclear power, water conservancy, bridges, tunnels and other large-scale infrastructure, especially the planning and implementation of the national railway passenger dedicated network project, the market demand for polycarboxylate water reducers continues to grow. Compared with traditional high-efficiency superplasticizers, although polycarboxylate superplasticizers have the advantages of strong slump retention, high water-reducing rate, and flexible molecular structure, naphthalene-based superplasticizers still have a lot of advantages in most parts of the country. Large market, especially in the field of ready-made concrete. However, the current polycarboxylate-based water-reducers are incompatible with naphthalene-based water-reducers. If two types of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/30
CPCC04B40/0039C04B2103/302C04B24/32C04B24/34C04B24/04C04B24/20C04B22/141C04B22/062C04B24/00C04B24/129C04B22/14C04B22/10C04B24/42
Inventor 武全福
Owner 合肥华福土工合成材料有限公司
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