A kind of foam concrete containing composite admixture and its preparation method and application

A composite admixture and foam concrete technology, which is applied in the field of thermal insulation materials, can solve the problems of weak hydration reaction, less hydration products, and poor corrosion resistance, and achieve the effects of increasing self-shrinkage, improving mechanical properties, and good durability

Inactive Publication Date: 2021-03-23
北京新时代寰宇科技发展有限公司 +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, a variety of admixtures are used in the FC preparation process. Although they can meet certain performance requirements, most of the admixtures used have weak hydration reactions with cement, and the resulting hydration products are less, making the prepared FC The product is also prone to problems such as poor durability, poor heat resistance, large dry shrinkage, poor crack resistance and poor corrosion resistance.

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
  • A kind of foam concrete containing composite admixture and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare foam concrete (FC) finished product by the following method 1

[0034] 1) Weigh 1 part by weight of foaming agent and 2 parts by weight of foam stabilizer, add 60 parts by weight of water to dilute, add to the foaming machine to prepare foam in advance, and set aside;

[0035] 2) Add 100 parts by weight of composite gelling material A, 50 parts by weight of composite admixture B, 1.0 part by weight of polypropylene fiber, and 1 part by weight of water reducing agent into a mixer, stir and premix to obtain a dry powder, Then add water according to the water-cement ratio of 0.2 to 0.5, and stir well to obtain a slurry;

[0036] 3) Add the prefabricated foam to the above slurry for foaming, then add 0.2 parts by weight of water-retaining agent and 0.5 parts by weight of water-repellent agent, and fully mix and stir;

[0037] 4) Pour into a 100×100×100 mold, shape, demould, and cure, and finally obtain the finished foam concrete 1 .

Embodiment 2

[0039] Preparation of foamed concrete (FC) finished product by the following method 2

[0040]1) Weigh 6 parts by weight of foaming agent and 0.5 parts by weight of foam stabilizer, add 130 parts by weight of water to dilute, add to the foaming machine to prepare foam in advance, and set aside;

[0041] 2) Add 100 parts by weight of composite gelling material A, 30 parts by weight of composite admixture B, 0.1 parts by weight of polypropylene fiber, and 10 parts by weight of water reducing agent into a mixer and stir and premix to obtain a dry powder. Then add water according to the water-cement ratio of 0.2 to 0.5, and stir well to obtain a slurry;

[0042] 3) Add the prefabricated foam to the above slurry for foaming, then add 0.8 parts by weight of water-retaining agent and 0.1 part by weight of water-repellent agent, and fully mix and stir;

[0043] 4) Inject into a 100×100×100 mold, shape, demould, and cure, and finally obtain the finished foam concrete 2.

Embodiment 3

[0045] Preparation of foamed concrete (FC) finished product by the following method 3

[0046] 1) Weigh 3 parts by weight of foaming agent and 1 part by weight of foam stabilizer, add 80 parts by weight of water to dilute, add to the foaming machine to prepare foam in advance, and set aside;

[0047] 2) Add 150 parts by weight of composite gelling material A, 60 parts by weight of composite admixture B, 0.8 parts by weight of polypropylene fiber, and 5 parts by weight of water reducing agent into a mixer and stir and premix to obtain a dry powder. Then add water according to the water-cement ratio of 0.2 to 0.5, and stir well to obtain a slurry;

[0048] 3) Add the prefabricated foam to the above slurry for foaming, then add 0.6 parts by weight of water-retaining agent and 0.1 part by weight of water-repellent agent, and fully mix and stir;

[0049] 4) Pour into a 100×100×100 mold, shape, demould, and cure, and finally obtain the finished foam concrete product 3 .

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
densityaaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses foam concrete containing a composite admixture as well as a preparation method and application thereof, and belongs to the field of thermal insulation materials. The foam concrete comprises the following raw materials in parts by weight: 100-150 parts of a composite cementing material A, 30-60 parts of a composite admixture B, 0.1-1.0 part of polypropylene fiber, 1-6 partsof a foaming agent, 0.5-2 parts of a foam stabilizer, 1-10 parts of a water reducing agent, 0.2-0.8 part of a water retention agent, 0.1-0.5 part of a water repellent and 60-180 parts of water, wherein the composite admixture B is a composite highly-active pozzolanic material. The composite admixture B adopted in the invention has highly-active pozzolanic properties and has a positive influence ona cement hydration process, therefore, an obtained FC finished product has the characteristics of high strength, good durability, excellent heat resistance, small dry shrinkage, strong crack resistance, good chemical corrosion resistance and the like, and can be used for an external thermal insulation system of an exterior wall and certain concrete projects with special requirements.

Description

technical field [0001] The invention relates to the field of thermal insulation materials, in particular to a foam concrete containing composite admixtures and a preparation method and application thereof. Background technique [0002] In the preparation process of foam concrete (referred to as FC) mixture, in order to save cement, improve the performance of FC, and adjust the strength level of FC, the natural or artificial mineral materials added are called admixtures. [0003] Volcanic ash contains a certain amount of active components such as activated silica and activated alumina. Pozzolanic activity refers to the reaction of these active components with the calcium hydroxide generated by cement hydration to form gelling materials such as hydraulic calcium silicate hydrate, calcium aluminate hydrate or calcium sulfoaluminate hydrate. [0004] At present, a variety of admixtures are used in the FC preparation process. Although they can meet certain performance requiremen...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/10C04B28/06
CPCC04B28/06C04B2111/28C04B2111/40C04B2111/52C04B2201/20C04B2201/32C04B2201/50C04B7/02C04B14/106C04B14/047C04B18/101C04B18/146C04B16/0633C04B24/14C04B24/42C04B24/383C04B24/2652C04B2103/302C04B38/10C04B24/26
Inventor 胡宝苓王二强杨李宁张迎新田俊岭
Owner 北京新时代寰宇科技发展有限公司
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