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A kind of concrete viscosity modifier and preparation method thereof

A viscosity modifier and concrete technology, applied in the field of building materials, can solve the problems of precipitation and delamination, affecting the fluidity of concrete, setting time strength and plastic accommodation, etc. Structured novel effect

Active Publication Date: 2018-01-02
GUIZHOU TIEJIANHENGFA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most water-retaining and viscosity-adjusting agents in the existing market, such as: cellulose, sodium alginate, Wenlun glue, polyvinyl alcohol, xanthan gum, dextrin, etc., are incompatible with polyacid water reducers, and there are precipitation and Problems such as delamination phenomenon will also affect the fluidity, setting time, strength and plastic containment of concrete

Method used

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  • A kind of concrete viscosity modifier and preparation method thereof
  • A kind of concrete viscosity modifier and preparation method thereof
  • A kind of concrete viscosity modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of high-efficiency and low-cost concrete viscosity modifier, comprising the following steps:

[0020] (1) Add 266g (2mol) of iminodiacetic acid (2mol), 160g (4mol) of sodium hydroxide and 2L of deionized water into a three-neck round bottom flask equipped with a thermometer and an electric stirrer, raise the temperature to 65°C and stir to make it homogeneous Dissolve in water; then slowly add 284g (2mol) of glycidyl methacrylate dropwise, and drop evenly within 4~5 hours, keep stirring at 65°C for 3 hours after the dropwise addition, and obtain a transparent and uniform product after the reaction solution, the concentration of the reaction product GMA-IDA was 1 mol / L.

[0021] (2) Take 42.85g of the GMA-IDA solution obtained above, 75g of acryloyloxyethyltrimethylammonium chloride, and 60g of acrylic acid, and prepare an aqueous solution with a mass concentration of 30%. Add water-soluble initiator equivalent to 0.05% of the total amount of materi...

Embodiment 2

[0024] A preparation method of high-efficiency and low-cost concrete viscosity modifier, comprising the following steps:

[0025] (1) Add 266g (2mol) of iminodiacetic acid (2mol), 160g (4mol) of sodium hydroxide and 2L of deionized water into a three-neck round bottom flask equipped with a thermometer and an electric stirrer, raise the temperature to 65°C and stir to make it homogeneous Dissolve in water; then slowly add 284g (2mol) of glycidyl methacrylate dropwise, and drop evenly within 4~5 hours, keep stirring at 65°C for 3 hours after the dropwise addition, and obtain a transparent and uniform product after the reaction solution, the concentration of the reaction product GMA-IDA was 1 mol / L.

[0026] (2) Take 34.28g of the GMA-IDA solution obtained above, 90g of acryloyloxyethyltrimethylammonium chloride, and 48g of methacrylic acid, and prepare an aqueous solution with a mass concentration of 30%, and pass nitrogen gas for 30 minutes at 25°C Finally, add a water-soluble...

Embodiment 3

[0029] A high-efficiency and low-cost concrete viscosity regulator, comprising the following steps:

[0030] (1) Add 266g (2mol) of iminodiacetic acid (2mol), 160g (4mol) of sodium hydroxide and 2L of deionized water into a three-neck round bottom flask equipped with a thermometer and an electric stirrer, raise the temperature to 65°C and stir to make it homogeneous Dissolve in water; then slowly add 284g (2mol) of glycidyl methacrylate dropwise, and drop evenly within 4~5 hours, keep stirring at 65°C for 3 hours after the dropwise addition, and obtain a transparent and uniform product after the reaction solution, the concentration of the reaction product GMA-IDA was 1 mol / L.

[0031] (2) Take 35.71g of the GMA-IDA solution obtained above, 62.5g of methacryloyloxyethyltrimethylammonium bromide, and 50g of methacrylic acid, and prepare an aqueous solution with a mass concentration of 25%. After 30 minutes of nitrogen gas, add a water-soluble initiator equivalent to 0.08% of th...

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Abstract

The invention discloses a concrete viscosity regulating agent and a preparation method thereof. The concrete viscosity regulating agent is a ternary polymer prepared through free radical polymerization of monomer GMA-IDA prepared from glycidyl methacrylate and iminodiacetic acid, acrylic acid (AA) or methacrylic acid, and cationic monomer. The concrete viscosity regulating agent is novel in structure, reasonable in design, and simple and safe in production process; conditions are easily controllable; organic solvents polluting the environment are not used in production; and the concrete viscosity regulating agent is a green environment-friendly water-soluble polymer and is easy for industrial production. The concrete viscosity regulating agent has good compatibility with concrete additives like a polycarboxylate superplasticizer, can substantially improve workability of concrete, inhibits the phenomenon of water segregation and separation of concrete in an early stage, improves slump loss resistance of the concrete and has certain anti-mud effect.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a concrete conditioner and a preparation method thereof. Background technique [0002] In recent years, with the continuous expansion of the scale of civil engineering and the continuous improvement of the level of science and technology, some important buildings with high-rise, long-span and special functional requirements continue to appear, such as skyscrapers, super-long-span bridges, high-speed railways and giant water conservancy projects. Construction, etc. , requiring concrete to have higher strength, better durability, and better stability. Concrete workability has always been an important indicator to measure the construction performance of concrete. However, due to the limitation of ground materials, fresh concrete will always have various problems such as bleeding, cohesion, encapsulation, and sensitivity to admixtures. [0003] At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F220/06C08F222/22C04B24/26C04B103/46
CPCC04B24/2688C04B2103/46C08F220/34C08F220/06C08F222/22
Inventor 刘成舟李本秀王毓陈娟陈凯穆黔
Owner GUIZHOU TIEJIANHENGFA NEW MATERIAL TECH CO LTD
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