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Environmentally-friendly green concrete

An environmentally friendly concrete technology, applied in the field of environmentally friendly green concrete, can solve the problems of reducing concrete strength, increasing cement consumption, unwillingness, etc., and achieve the effects of increasing the proportion of use, saving costs, and reducing costs

Active Publication Date: 2013-07-03
上海德滨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is very difficult to classify and recycle concrete and bricks for this kind of brick-concrete structure building waste, so usually the recycled aggregate of house construction waste is mixed recycled aggregate, which contains more broken bricks, and commercial concrete companies usually use this kind of recycled aggregate They have a repulsive mentality and are not willing to use them. They are afraid that the use of recycled aggregates will increase the amount of cement and reduce the strength of concrete. Construction companies are also unwilling to use concrete produced from recycled aggregates. Therefore, this recycled aggregate in my country replaces natural aggregates to realize construction waste. The reuse industry has not been well developed

Method used

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  • Environmentally-friendly green concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 , Preparation of environmentally friendly powder materials

[0027] Prepare the environment-friendly powder material of the present invention according to the following steps:

[0028] A. Dispose of construction waste through pretreatment equipment to obtain materials with a particle size of 5mm≤particle size≤50mm;

[0029] Specifically, the construction waste is first roughly crushed, and the construction waste is roughly crushed to a material with a particle size of about 100mm by using extrusion crushing equipment or impact crushing equipment; then light combustible materials such as plastics, fabrics, and wood in the construction waste are manually Or mechanical sorting and removal; then use impact crushing equipment (impact crushing or coarse hammer crushing) to achieve medium crushing of construction waste coarse materials; at the same time, due to the low strength of the soil in construction waste, in the high-speed rotating crushing equipment , beati...

Embodiment 2

[0032] Example 2 , Preparation of environmentally friendly green concrete

[0033] According to the formula shown in Table 1, mix and stir all the components in proportion, based on the slump of 90mm, add an appropriate amount of water and stir evenly again, pouring and curing, and then the environment-friendly green concrete is obtained.

[0034] Table 1

[0035]

Embodiment 3

[0036] Example 3 , Environmental friendly green concrete detection

[0037] Get the environment-friendly green concrete of embodiment 2, detect according to " ordinary concrete mechanical property test method standard GB / T 50081-2002 ", the results are shown in Table 2:

[0038] Table 2

[0039]

C30

C25

C20

C15

C10

3-day compressive strength (MPa)

20.3

16.9

10.7

9.9

6.6

28-day compressive strength (MPa)

35.6

30.1

22.2

16.5

12.3

Initial setting time (h)

2

2

2

2

2

[0040] From the results in Table 2, it can be known that the strength of each grade of the environmentally friendly green concrete of the present invention can meet the design requirements after testing.

[0041] Further, the C30 concrete in Table 1 was poured into mass concrete, and there was no obvious temperature shrinkage crack.

[0042] According to the ...

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Abstract

The invention discloses an environmentally-friendly green concrete. The green concrete is prepared from the following material components in ratio by weight: 10-30% of an environmentally-friendly powder material, 5-15% of cement, 0-50% of natural stone, 0-50% of concrete recycled aggregate, 10-20% of coarse sand, and 1-2% of additives. The environmentally-friendly green concrete disclosed by the invention uses the building recycled environmentally-friendly powder material with a certain activity and capable of replacing a part of cement, thus saving cost, improving peaceability, reducing the phenomena of bleeding and separation, and improving the performance of the concrete; and the environmentally-friendly green concrete has the functions of delaying coagulation, reducing water, enhancing compactness and later-stage strength, reducing hydration heat, suppressing sun-crack and shrink, and improving acid-base reaction resisting capacity.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an environmentally friendly green concrete. Background technique [0002] Concrete is the largest man-made material and the most used building material in my country, so it is also the building material that consumes the most natural resources. With the increasing scale of construction, the depletion of resources, and the need for environmental protection, the circular economy of the construction industry is increasingly placed in front of us. [0003] The main content of circular economy in the construction industry is the recycling and utilization of construction waste. At present, my country's construction waste resource recycling technology route is to replace natural aggregates with recycled aggregates for concrete production, which is not in line with the current national conditions in my country from a practical point of view. At this stage and in the next 20 years, my ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16
CPCY02W30/91
Inventor 杨德志徐东升朱伟良刘琼陆沈磊王晓波董杨
Owner 上海德滨环保科技有限公司
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