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A kind of lightweight concrete aggregate and its preparation method

A lightweight aggregate and concrete technology, which is applied in the field of waste resource utilization, can solve the problem of oil-based drill cuttings being difficult to handle, and achieve the effects of reducing preparation cost, low water absorption, and reducing the risk of diffusion and migration.

Active Publication Date: 2020-04-14
YANGTZE NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a concrete lightweight aggregate and its preparation method to solve the problem that the oil-based drilling cuttings produced in shale gas exploitation are difficult to handle

Method used

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  • A kind of lightweight concrete aggregate and its preparation method
  • A kind of lightweight concrete aggregate and its preparation method
  • A kind of lightweight concrete aggregate and its preparation method

Examples

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Embodiment 1

[0038] In this embodiment, the concrete light aggregate is prepared from the following raw materials: 80 kg of oil-based drilling cuttings, 10 kg of municipal sludge, 0.8 kg of pore-forming agent, and 9.2 kg of water, wherein the pore-forming agent is carbon particles.

[0039] The preparation method is as follows:

[0040] (1) Dry oil-based drilling cuttings and municipal sludge in an oven at 105°C, then mix 80kg of oil-based drilling cuttings, 10kg of municipal sludge and 0.8kg of carbon particles evenly, and then ball mill to make raw meal. for 20min.

[0041] (2) Put the prepared raw material into the automatic ball forming machine, control the rotating speed of the pot of the ball forming machine to 20r / min, sprinkle water evenly during the rotation process, make the raw material wet and form a circle on the surface of the material A layer of water film continuously absorbs raw materials during the rolling process. After the ball forming, the spherical green body was ag...

Embodiment 2

[0048] The raw materials for preparing concrete light aggregates in embodiment 2 and embodiment 3 are as shown in table 2, and the preparation method is the same as embodiment 1, and the difference is that the pore-forming agent is carbon particles and wood chips in embodiment 2, and both The mass ratio is 2:1, and the pore forming agent in Example 3 is limestone powder.

[0049] Table 2 Composition of raw materials for preparing concrete lightweight aggregates in Examples 1-3 (kg)

[0050] Example Oil-based cuttings municipal sludge Porogen water 1 80 10 0.8 9.2 2 70 20 1 9 3 60 30 0.7 9.3

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Abstract

The invention discloses concrete lightweight aggregate and a preparation method thereof. The concrete lightweight aggregate is prepared from the following raw materials by mass percent: 60-80% of oil-base drilling cuttings, 10-30% of civil sludge, 0.8-7% of a pore-forming agent and 9-9.3% of water. The preparation method comprises the following steps: (1) evenly mixing the dry oil-base drilling cuttings with the civil sludge and the pore-forming agent, and then carrying out ball-milling on the obtained mixture to obtain a raw material; (2) putting the prepared raw material into an automatic ball forming mill for balling, evenly sprinkling water in a balling process, aging the prepared green body after balling is finished, and then drying; (3) calcining the dried green body, and then cooling the product along with a furnace so as to obtain the concrete lightweight aggregate. The main raw materials of the concrete ceramsite lightweight aggregate prepared by the method are solid wastes, and all technical indexes of the concrete ceramsite lightweight aggregate meet the related requirements of standard in China; furthermore, the concrete lightweight aggregate is good in leaching resistance, does not cause secondary pollution and low in cost, thus having better industrial application prospect.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste, and in particular relates to a lightweight concrete aggregate and a preparation method thereof. Background technique [0002] According to the classification of concrete bulk density, the general bulk density is 1950kg / m 3 The following concretes are collectively referred to as lightweight concrete. Compared with ordinary concrete (the bulk density is generally 2400kg / m 3 ), due to its light weight, low elastic modulus, good shock resistance, thermal insulation, and non-combustibility, it has been widely used in industrial and civil buildings, especially high-rise and long-span structures. In the preparation process of light concrete, the bulk density, cylinder compressive strength, water absorption rate and pore structure of the light aggregate used directly determine the various properties of the prepared light concrete. [0003] According to the source of light aggregate, it can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/02
Inventor 刘东升冉媚文桃古茜
Owner YANGTZE NORMAL UNIVERSITY
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