Unlock instant, AI-driven research and patent intelligence for your innovation.

Recycled concrete as well as preparation method and application thereof

A recycled concrete and concrete technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high cost, high carbon emissions, high energy consumption of ordinary concrete, etc., to save energy and cost The effect of reducing and reducing CO2 emissions

Inactive Publication Date: 2020-11-03
浙江二十冶建设有限公司 +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, ordinary concrete can no longer meet the requirements of modern buildings, but using waste concrete, cleaning, crushing, grading and mixing it in a certain proportion to obtain recycled coarse aggregate, and partially or completely replacing natural aggregate with recycled coarse aggregate to prepare a recyclable concrete Recycled recycled concrete is bound to become the development trend of building materials
[0003] At present, most of the roads in residential quarters are poured with ordinary concrete. Ordinary concrete consumes a lot of energy, has high carbon emissions and high costs. Considering that the roads in residential quarters bear less force, it is entirely possible to design and develop a concrete that meets the performance of the road. Renewable concrete materials that can reduce energy consumption, carbon emissions and low cost are required

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
  • Recycled concrete as well as preparation method and application thereof
  • Recycled concrete as well as preparation method and application thereof
  • Recycled concrete as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The waste concrete is crushed by a crusher, and then screened by a large-scale screening machine into the particle size gradation shown in Table 1. After cleaning and curing, the recycled coarse aggregate is obtained, as shown in figure 1 shown.

[0035] Table 1 Size distribution of recycled aggregates

[0036]

[0037] Weigh 524Kg of granite crushed stone, 524Kg of recycled coarse aggregate, 720Kg of desalinated sea sand, 90Kg of mineral powder, 335Kg of Conch P.042.5 ordinary Portland cement, 7.2Kg of high-efficiency polycarboxylate superplasticizer, and 185.6Kg of tap water, and set aside;

[0038] Mix 83.75Kg of cement, 22.5Kg of mineral powder, 180Kg of desalinated sea sand, and 55.68Kg of tap water, and stir for 1 minute to prepare a high water-cement ratio mud;

[0039] Add 524Kg of regenerated coarse aggregate to the prepared high water-cement ratio mud, stir for 0.5min, then add 524Kg of natural aggregate and the remaining amount of cement, mineral powder a...

Embodiment 2

[0043] The waste concrete is crushed by a crusher, and then screened by a large-scale screening machine into the particle size gradation shown in Table 1. After cleaning and curing, the recycled coarse aggregate is obtained, as shown in figure 1 shown.

[0044] Table 1 Size distribution of recycled aggregates

[0045]

[0046] Weigh 524Kg of natural aggregate, 655Kg of recycled coarse aggregate, 733.6Kg of desalinated sea sand, 112.66Kg of mineral powder, 393Kg of Conch brand P.042.5 ordinary Portland cement, 13.1Kg of high-efficiency polycarboxylate superplasticizer, and 189.03Kg of tap water, spare;

[0047] Take 98.25Kg of cement, 28.165Kg of mineral powder, 183.4Kg of desalinated sea sand and 56.709Kg of tap water to mix, and stir for 1min to obtain a high water-cement ratio mud;

[0048] Add 655Kg of recycled coarse aggregate to the prepared high water-cement ratio mud, stir for 0.5min, then add 524Kg of natural aggregate and the remaining amount of cement, mineral pow...

Embodiment 3

[0052] The waste concrete is crushed by a crusher, and then screened by a large-scale screening machine into the particle size gradation shown in Table 1. After cleaning and curing, the recycled coarse aggregate is obtained, as shown in figure 1 shown.

[0053] Table 1 Size distribution of recycled aggregates

[0054]

[0055] Weigh 524Kg of natural aggregate, 419.2Kg of recycled coarse aggregate, 607.8Kg of desalinated sea sand, 62.9Kg of mineral powder, 293Kg of Conch brand P.042.5 ordinary Portland cement, 6.29Kg of high-efficiency polycarboxylate superplasticizer, and 182.9Kg of tap water ,spare;

[0056] Mix 73.25Kg of cement, 15.73Kg of mineral powder, 151.95Kg of desalinated sea sand and 54.87Kg of water, and stir for 0.5min to prepare a high water-cement ratio mud;

[0057] Add the regenerated coarse aggregate to the prepared high water-cement ratio mud, stir for 1 minute, then add 524Kg of natural aggregate and the remaining amount of cement, mineral powder, 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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of recycled building materials, and particularly relates to recycled concrete and a preparation method and application thereof. In the method, the recycledcoarse aggregate is adopted to replace part of natural aggregate to prepare the recycled concrete, the energy consumption of the recycled concrete is 25% of the energy consumption of concrete obtained by completely adopting the natural aggregate, the cost is reduced by 12.5%; meanwhile, the CO2 emission can be reduced by 20%, so that the energy is saved, and the environment is protected. During preparation, a cementing material and water are firstly added by adopting a secondary stirring process to form high-water-cement-ratio slurry, then recycled coarse aggregate is added, the slurry permeates into micro-cracks of the recycled coarse aggregate, and a cement slurry shell is formed on the surface of the slurry, so that the strength of the recycled coarse aggregate is enhanced, and the overall strength of the recycled concrete is improved; therefore, the finally prepared concrete meets the construction requirements of subgrade and pavement of residential districts.

Description

technical field [0001] The invention belongs to the technical field of recycled building materials, and in particular relates to recycled concrete and its preparation method and application. Background technique [0002] As a material with extremely high demand in civil engineering construction, concrete has become the backbone of the field of building materials. At the same time, as the pillar industry of the construction industry, concrete is also a well-deserved "big household" in terms of resource and energy consumption. This is contrary to the current situation of resource shortage and energy shortage in the 21st century, and also violates the circularity advocated by our country. The concept of sustainable development of the economy and the protection of the ecological environment. Therefore, how to reduce energy consumption and carbon emissions in the production process has become an important topic in the research of building materials technology. Obviously, ordina...

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 Applications(China)
IPC IPC(8): C04B28/04C04B18/16
CPCC04B18/16C04B28/04C04B2111/0075C04B2201/50C04B18/12C04B14/068C04B2103/302C04B22/002Y02W30/91
Inventor 陈志刚王鹏关伟魏新宏
Owner 浙江二十冶建设有限公司