Concrete recycled aggregate and preparation process thereof

A concrete regeneration and preparation technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of restricting the development of recycled concrete, high water absorption of recycled aggregates, and reduced concrete strength Enhanced binding strength, improved water resistance, and reduced porosity and water absorption

Inactive Publication Date: 2019-12-13
重庆交能建材有限责任公司
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above methods have improved the strength of recycled concrete to varying degrees, because the recycled aggregate produces cracks and voids during crushing or processing, the water absorpt

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
  • Concrete recycled aggregate and preparation process thereof
  • Concrete recycled aggregate and preparation process thereof
  • Concrete recycled aggregate and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-3

[0042] In the preparation example 1-3, the water-based polyurethane emulsion is selected from the water-based polyurethane emulsion of F81 sold by Henan Bikai Water-based New Material Co., Ltd., and the epoxy resin is selected from the epoxy resin of E-44 sold by Guangzhou Daoning Chemical Co., Ltd. resin.

preparation example 1

[0043] Preparation Example 1: Add 0.8kg of epoxy resin and 0.05kg of 2,2-dihydroxypropionic acid to 1kg of water-based polyurethane emulsion according to the dosage in Table 1, add 0.04kg of styrene and 0.01kg of acrylic acid slowly to 110°C A mixed solution of butyl ester, 0.02kg methyl methacrylate and 0.01kg hydroxypropyl methacrylate, the temperature is slowly raised during the dropwise addition, and after the drop is completed, the temperature is raised to 120°C for 6 hours, and cooled to room temperature to obtain epoxy resin Modified waterborne polyurethane.

[0044] The raw material ratio of epoxy resin modified polyurethane in the preparation example 1-3 of table 1

[0045]

[0046]

preparation example 2

[0047] Preparation Example 2: According to the dosage in Table 1, add 1.1kg epoxy resin and 0.08kg 2,2-dihydroxypropionic acid to 2kg water-based polyurethane emulsion, add to 130°C, slowly add dropwise 0.06kg styrene, 0.02kg A mixed solution of butyl acrylate, 0.03kg methyl methacrylate and 0.03kg hydroxypropyl methacrylate, the temperature rises slowly during the dropwise addition, and after the dropwise rises to 120°C for 7 hours, then cools to room temperature to obtain epoxy Resin-modified waterborne polyurethane.

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
Meshaaaaaaaaaa
Meshaaaaaaaaaa
Meshaaaaaaaaaa
Login to view more

Abstract

The invention discloses a concrete recycled aggregate and a preparation process thereof. The preparation process of the concrete recycled aggregate comprises the following steps: S1, crushing and six-stage screening; S2, soaking in hydrochloric acid to prepare a pretreated recycled aggregate; S3, mixing silicon dioxide, expanded graphite, bentonite and talcum powder, and mixing an obtained mixturewith water-based BOPP resin and deionized water to prepare a thermal insulation filler; S4, preparing a reinforcing filler from glass beads, calcium ion powder, glass fiber powder and acrylate; S5, performing fermentation treatment on the pretreated recycled aggregate, bacillus, quick lime and the like to obtain a fermentation product; S6, mixing the fermentation product with the crushed straw and a trimethylmethoxysilane solution, and exposing an obtained recycled aggregate to the sun; and S7, mixing the recycled aggregate with the steel slag to prepare a mixed aggregate, and then mixing themixed aggregate with an epoxy resin modified waterborne polyurethane. The concrete recycled aggregate disclosed by the invention has the advantages of low water absorption rate and small void ratio,so that the prepared concrete has high compressive strength.

Description

technical field [0001] The invention relates to the technical field of building material preparation, more specifically, it relates to a concrete recycled aggregate and a preparation process thereof. Background technique [0002] Since the beginning of the 21st century, my country has entered a stage of rapid urbanization. With the demolition and reconstruction of original buildings, a large number of construction wastes have accumulated, and the ecological environment pollution has become more and more serious. The demolition of houses, roads, bridges and other concrete buildings, as well as the waste concrete produced in the process of concrete production and construction, undergo a series of processing such as crushing, cleaning and grading, and match them in proportion to obtain recycled aggregate with a particle size below 40mm. Compared with natural aggregates, recycled aggregates have problems such as high water absorption, many fine cracks, poor durability and bondin...

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): C04B20/02C04B18/16
CPCC04B18/167C04B20/02C04B20/023C04B20/026Y02W30/91
Inventor 梅灵军谭旭强于飞杨青
Owner 重庆交能建材有限责任公司
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