Soil sacrificial agent for polycarboxylate superplasticizer and preparation method of soil sacrificial agent

A water reducing agent and polycarboxylic acid technology, applied in the field of concrete admixtures, can solve the problems of limited anti-sludge effect, staying in the experimental stage, and not yet realized industrial application, etc. Improve cracking effect

Pending Publication Date: 2021-01-26
安徽海螺材料科技股份有限公司 +1
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main ways and shortcomings of the above patent documents to improve the mud resistance of polycarboxylate superplasticizers are as follows: 1. The solution is to compound inorganic salts and simple organic substances in polycarboxylate superplasticizers, but this method is resistant to mud The effect is limited; 2. The anti-mud

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Soil sacrificial agent for polycarboxylate superplasticizer and preparation method of soil sacrificial agent
  • Soil sacrificial agent for polycarboxylate superplasticizer and preparation method of soil sacrificial agent
  • Soil sacrificial agent for polycarboxylate superplasticizer and preparation method of soil sacrificial agent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034]Example 1

[0035]A preparation method of soil sacrificial agent for polycarboxylic acid water reducer, the steps are as follows:

[0036]In parts by mass, put 230 parts of styrene and 55 parts of absolute ethanol into the reactor with stirring, nitrogen protection and reflux cooling tube, turn on the nitrogen protection device, turn on the reflux cooling tube to circulate cooling water, and turn on the stirring to mix the materials evenly , Control the material temperature to 45℃, and start adding one third of the total amount of initiator A to the reaction system (the total amount of initiator A is 6 parts, and then add initiator to the reaction system every 1 hour One-third of the total amount of A), start dropping 90 parts of acrylic acid and 39 parts of methallyl alcohol at a constant rate; add acrylic acid and methallyl alcohol at a constant rate for 3 hours. After the addition, continue to react for 1 hour. The temperature of the material is raised to 90°C, and the absolute e...

Example Embodiment

[0037]Example 2

[0038]A preparation method of soil sacrificial agent for polycarboxylic acid water reducer, the steps are as follows:

[0039]In parts by mass, put 230 parts of styrene and 55 parts of absolute ethanol into the reactor with stirring, nitrogen protection and reflux cooling tube, turn on the nitrogen protection device, turn on the reflux cooling tube to circulate cooling water, and turn on the stirring to mix the materials evenly , Control the material temperature to 40℃, start to add one third of the total amount of initiator A to the reaction system (the total amount of initiator A is 8 parts, and then add initiator to the reaction system every 1 hour One-third of the total amount of A), start dropping 95 parts of acrylic acid and 36 parts of methallyl alcohol at a constant speed; add acrylic acid and methallyl alcohol at a constant speed for 3 hours, and continue the reaction for 1 hour after the addition is complete. The temperature of the material is raised to 88°C, a...

Example Embodiment

[0040]Example 3

[0041]A method for preparing a soil sacrificial agent for polycarboxylic acid water reducer, the steps are as follows:

[0042]In parts by mass, put 230 parts of styrene and 55 parts of absolute ethanol into the reactor with stirring, nitrogen protection and reflux cooling tube, turn on the nitrogen protection device, turn on the reflux cooling tube to circulate cooling water, and turn on the stirring to mix the materials evenly , Control the material temperature to 43℃, and start adding one third of the total amount of initiator A into the reaction system (the total amount of initiator A is 7 parts, and then add initiator into the reaction system every 1 hour One-third of the total amount of A), start dropping 93 parts of acrylic acid and 37 parts of methallyl alcohol at a constant speed; add acrylic acid and methallyl alcohol at a constant speed for 3 hours, and continue to react for 1 hour after the addition is complete. The temperature of the material is raised to 92...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Nominal particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a soil sacrificial agent for a polycarboxylate superplasticizer and a preparation method of the soil sacrificial agent. The preparation method of the soil sacrificial agent forthe polycarboxylate superplasticizer comprises the following steps: (1) in a protective atmosphere, mixing and stirring styrene and ethanol, conducting heating to 40-45 DEG C, adding an initiator A in batches, simultaneously adding acrylic acid and methallyl alcohol for reaction, conducting heating to 88-92 DEG C after the reaction, and removing redundant ethanol and water to obtain an intermediate product; and (2) adding an initiator B into the intermediate product obtained in the step (1), conducting stirring and heating to 90-95 DEG C, adding ethylene oxide for reaction, adding water for dilution after the reaction is finished, and adjusting the pH value of the system to 5-7. The soil sacrificial agent can effectively inhibit soil from gradually absorbing water and expanding, so that the water demand of concrete is reduced, the problems of quick concrete loss and large pump loss are solved, and the problems of cracking, low strength, poor durability and the like after the concreteis hardened are further solved.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, in particular to a soil sacrificial agent for polycarboxylate water reducers and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer has become a popular medium in concrete because of its high water reducing rate, good adaptability to cement, high cost performance, good slump retention, low shrinkage and good durability of the concrete prepared with it. The most widely used admixture species. However, with the rapid development of my country's high-speed, high-speed rail, real estate, municipal facilities, water conservancy and hydropower projects, the demand for concrete is huge, which in turn leads to a huge consumption of sand and gravel aggregates for the production of concrete, and high-quality sand and gravel aggregates are becoming more and more popular. The worse the shortage, the more obvious the deterioration trend of sand and gravel aggregates...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F212/08C08F220/06C08F216/08C08F8/00C08G65/28C04B24/26
CPCC08F212/08C08F8/00C08G65/2612C04B24/2694C08F220/06C08F216/08
Inventor 赵连国李才江元华赵葵潘玉杰范龙张胜男索喜梅汪洋
Owner 安徽海螺材料科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap