Compound admixture for bare concrete and bare concrete

A technology of fair-faced concrete and composite admixture, applied in the field of concrete materials, can solve the problems of increased concrete bleeding rate, short initial setting and final setting time of concrete, affecting the surface smoothness and flatness of fair-faced concrete, etc. The effect of prolonging the interval between initial and final coagulation, and the long interval between initial and final coagulation

Active Publication Date: 2018-07-13
龙南恒沣建材有限公司
View PDF13 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, although some additives can improve the fluidity of concrete, it is easy to increase the bleeding rate of concrete; although some additives can reduce the bleeding rate of concr

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
  • Compound admixture for bare concrete and bare concrete
  • Compound admixture for bare concrete and bare concrete
  • Compound admixture for bare concrete and bare concrete

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] Preparation of polycarboxylate copolymer: Weigh 250Kg of water and place it in the reactor, add 32Kg of sodium methacrylic acid sulfonate monomer, 30Kg of vinyl glycol ether monomer, and 17Kg of dimethylaminopropyl methacrylate in sequence Amide monomer, and add 5Kg ammonium persulfate initiator, mix well, heat to 60°C, add 29Kg acrylic monomer, continue to heat to 90°C, react for 4 hours, cool, adjust the pH value to 6~ with sodium hydroxide 7. Obtain a polycarboxylate copolymer solution, purify and dry with ethanol to obtain a polycarboxylate copolymer with an average molecular weight of 500,000.

[0028] Preparation of fair-water concrete composite admixture: 80Kg polycarboxylate copolymer, 5Kg fatty alcohol ether sodium sulfate, 2Kg fatty acid diethanolamide, 10Kg nonahydrate sodium metasilicate, 15Kg citric acid-disodium hydrogen phosphate, 10Kg gluconic acid Sodium, 3.5Kg polyoxyethylene polyoxypropanolamine ether, 22Kg tetramethylurea, 30Kg polyeth...

Example Embodiment

[0030] Example 2

[0031] Preparation of polycarboxylate copolymer: Weigh 250Kg of water and place it in the reactor, add 16Kg of sodium methacrylic acid sulfonate monomer, 35Kg of vinyl glycol ether monomer, and 22Kg of dimethylaminopropyl methacrylate in sequence Amide monomer, and add 5Kg ammonium persulfate initiator, mix well, heat to 60°C, add 31Kg acrylic monomer, continue to heat to 90°C, react for 4 hours, cool, adjust the pH value to 6~ with sodium hydroxide 7. Obtain a polycarboxylate copolymer solution, purify and dry with ethanol to obtain a polycarboxylate copolymer with an average molecular weight of 600,000.

[0032] Preparation of fair water concrete composite admixture: 83Kg polycarboxylate copolymer, 6Kg sodium alkylbenzene sulfonate, 3Kg sucrose fatty acid ester, 4Kg sodium silicate, 12Kg disodium hydrogen phosphate-sodium dihydrogen phosphate, 12Kg sodium gluconate , 5Kg of polyoxyethylene polyoxypropanolamine ether, 20Kg of tetramethylurea, 34Kg of polyethyle...

Example Embodiment

[0034] Example 3

[0035] Preparation of polycarboxylate copolymer: Weigh 250Kg of water and place it in the reaction kettle, add 20Kg of sodium methacrylic acid sulfonate monomer, 18Kg of vinyl glycol ether monomer, and 25Kg of dimethylaminopropyl methacrylate in sequence Amide monomer and add 5Kg ammonium persulfate initiator, mix well, heat to 60°C, add 46Kg acrylic monomer, continue to heat up to 90°C, react for 4 hours, cool, adjust the pH value to 6~ with sodium hydroxide 7. Obtain a polycarboxylate copolymer solution, purify and dry with ethanol to obtain a polycarboxylate copolymer with an average molecular weight of 600,000.

[0036] Preparation of fair-water concrete composite admixture: 86Kg polycarboxylate copolymer, 7Kg polyacrylamide, 4Kg alkylphenol polyoxyethylene ether, 5.5Kg sodium aluminosilicate, 13Kg acetic acid-ammonium acetate, 5Kg sodium gluconate, 2Kg poly The oxyethylene polyoxypropanolamine ether, 24Kg of tetramethylurea, 37Kg of polyethylene glycol, and...

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

No PUM Login to view more

Abstract

The invention relates to a compound admixture for bare concrete and the bare concrete, belonging to the technical field of concrete materials. The compound admixture for the bare concrete is preparedfrom a polycarboxylate copolymer, an anionic surfactant, a nonionic surfactant, an activator, a buffer solution, sodium gluconate, polyoxyethylene polyoxypropylene ether, tetramethylurea, polyethyleneglycol and water. The bare concrete is prepared by mixing the compound admixture for the bare concrete, cement, fly ash, sand, stones and water. After being mixed with the concrete, the compound admixture for the bare concrete can improve the fluidity without increasing the bleeding rate of the concrete, and prolongs the time interval between initial setting and final setting, thus enabling the concrete to have the advantages of being low in bleeding rate, high in fluidity and long in time interval between initial setting and final setting.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a composite admixture for clear-water concrete and clear-water concrete. Background technique [0002] Fair-faced concrete is a concrete that directly uses the natural texture of concrete as a finishing effect. With the development of my country's fair-faced concrete technology, fair-faced concrete is gradually being used in the construction of subways, high-speed railways, highways, bridges and culverts, high-rise buildings, and water conservancy dams. Compared with ordinary concrete, fair-faced concrete requires uniform, smooth surface color, no honeycomb pitting, and no bump damage. Since the fair-faced concrete structure does not require decoration, it saves processes such as paint and finishing, greatly reduces construction waste, and is conducive to protecting the environment. Tests have shown that adding various additives to concrete, such as water reducers, e...

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): C04B28/04C04B24/32C08F228/02C08F220/06C08F216/14C08F220/60
CPCC04B28/04C04B40/0039C04B2201/50C08F216/1416C08F228/02C08F220/06C08F220/60C04B24/166C04B24/16C04B24/124C04B22/08C04B22/16C04B24/06C04B24/10C04B24/32C04B24/12C04B22/002C04B18/08C04B14/06C04B14/02C04B24/20C04B24/08C04B12/04C04B24/2652C04B24/04C04B24/123
Inventor 宋勇波
Owner 龙南恒沣建材有限公司
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