Full steel slag roller compacted concrete and preparation method thereof

A technology of roller compacted concrete and steel slag, which is applied in the field of metallurgical slag treatment and resource utilization, which can solve the problem of using steel slag and roller compacted concrete without all-round full-size, and not realizing the dual advantages of steel slag gelling and wear-resistant aggregates , did not realize the compensation effect of steel slag concrete dry shrinkage and other issues, to achieve the effect of excellent crushing performance, increase the added value of comprehensive utilization, and save natural resources and energy

Active Publication Date: 2014-09-24
宝武环科武汉金属资源有限责任公司
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Problems solved by technology

The Chinese invention patent with the publication number CN101215126 discloses a steel slag roller compacted concrete, which replaces part of the sand with steel slag and part of the cement with steel slag micropowder, and achieves better results. The steel slag used is 0.001-10mm roller slag, but the The invention did not realize that steel slag has the dual advantages of gelling and wear-resistant aggregates, nor did it realize the compensation effect of the micro-expansion of steel slag on the shrinkage of concrete, and it did not realize the utilization of steel slag dust and mud, so there was no all-round and comprehensive Granularity Utilization of Steel Slag and RCC

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[0020] In order to better explain the present invention, the main content of the present invention is further clarified below in conjunction with specific examples, but the content of the present invention is not limited to the following examples.

[0021] The present invention also provides a method for preparing all-steel slag roller compacted concrete, comprising the following steps:

[0022] 1) The liquid steel slag obtained from converter steelmaking is subjected to high-temperature hot-splashing treatment, and then undergoes a processing process of magnetic separation, screening, and drum sieve water washing to obtain steel slag aggregates for future use; wherein, the mud content is ≤2%. The steel slag aggregate used is produced by the above-mentioned steel slag, the converter steel slag whose particle size is between 4.75 and 19.5mm, and whose density reaches 3.5±0.2g / cm 3 , f-CaO content ≤ 5%, metallic iron content less than 2%, pulverization rate ≤ 1%;

[0023] 2) Ca...

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Abstract

The invention discloses a full steel slag roller compacted concrete and a preparation method thereof. The full steel slag roller compacted concrete comprises the following raw materials by weight: 24-37 portions of a steel slag composite powder, 45-65 portions of a steel slag aggregate, 11-18 portions of steel slag water washing mud and 3-5 portions of water. The method is as below: weighing the steel slag composite powder, steel slag aggregate, steel slag water washing mud and water according to the weight ratio; and uniformly mixing to obtain the full steel slag roller compacted concrete. The invention can play the recycling value of metallurgical wastes, reduce the cost of roller compacted concrete, and obtain great economic benefits. More important, application of the invention can economize natural gravel and cement, thereby saving natural resources and energy and protecting the ecological environment.

Description

technical field [0001] The invention relates to the technical field of metallurgical slag treatment and resource utilization, in particular to an all-steel slag roller compacted concrete and a preparation method thereof. Background technique [0002] Roller compacted concrete is a kind of cement-poor concrete that achieves high density and high strength through vibratory rolling construction technology. It is a kind of dry hard cement concrete with zero slump. Compared with ordinary concrete, RCC obtains strength by interlocking between coarse aggregates. It uses less water, has low consistency, and can save a lot of cement. , and the construction speed is fast and the maintenance time is short. It is mainly used for road pavement engineering and hydraulic dam engineering. [0003] With the enhancement of our country's awareness of environmental protection and the establishment of the concept of circular economy, Chinese scholars and technicians continue to try to use secon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08
Inventor 李灿华汪平刚刘思华洲连李亚光余海万心平董文楷
Owner 宝武环科武汉金属资源有限责任公司
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