High-titanium slag sand reactive powder concrete and preparation method thereof

A high-titanium slag, active powder technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of ecological environment damage, low utilization rate of high-titanium slag, etc. The effect of shortage of raw materials and efficient and high-quality utilization

Active Publication Date: 2020-06-30
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the utilization rate of high-titanium slag is not high at present. According to preliminary estimates, the accumulation of high-titanium slag in China has reached 200 million tons, and it is still growing at a rate of 20 million tons per year, causing serious damage to the ecological environment.

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  • High-titanium slag sand reactive powder concrete and preparation method thereof
  • High-titanium slag sand reactive powder concrete and preparation method thereof
  • High-titanium slag sand reactive powder concrete and preparation method thereof

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preparation example Construction

[0026] One aspect of the present invention provides a method for preparing high titanium slag sand active powder concrete. In an exemplary embodiment of the high-titanium slag sand active powder concrete preparation method of the present invention, the preparation method may include:

[0027] Step S01, drying, crushing, screening, and gradation design of the high-titanium slag to obtain the high-titanium slag sand after the gradation design.

[0028] In this embodiment, the high-titanium slag sand includes: TiO 2 16%~23%, SiO 2 15%~23%, CaO 17%~25%, Al 2 o 3 18%~22%, MgO 6%~9%, Fe 2 o 3 4% to 7%, others are some unavoidable impurities. The high-titanium slag is natural-dried or equipment-dried high-titanium slag, the particles of the high-titanium slag have stable crystallization, low glass phase content, good circularity, and almost no needle-like particles. The high-titanium slag is used as aggregate, and will not cause poor durability due to alkali-aggregate react...

example 1

[0047] A kind of high-titanium slag-sand active powder concrete, the high-titanium slag sand, 17.4 parts of cement, 8.7 parts of fly ash, 2.8 parts of silica fume, 3.0 parts of steel fiber, 0.6 parts of Prepared from polycarboxylate water reducer and 6.4 parts of water.

[0048] Preparation methods include:

[0049] 1) After drying the high-titanium slag in an oven at 105°C, crush it into a particle size of less than 1.18mm in a crusher. Then sieve into three grades of 1.18mm-0.6mm, 0.6mm-0.3mm, and 0.3mm-0.15mm for later use.

[0050] 2) In parts by mass, 61.1 parts of high-titanium slag sand, 17.4 parts of cement, 8.7 parts of fly ash, 2.8 parts of silica fume, 3.0 parts of steel fiber, 0.6 parts of water reducing agent and 6.5 parts of water are mixed into powder;

[0051] 3) After mixing the powder and steel fiber in step 2 evenly, add water and stir evenly, then slowly add the high-titanium slag sand obtained in step 1, stir, injection molding, vibration compaction;

...

example 2

[0055] A kind of high-titanium slag-sand active powder concrete, which consists of 56.5 parts of high-titanium slag sand, 20.16 parts of cement, 10.08 parts of fly ash, 3.36 parts of silica fume, 2.8 parts of steel fiber, and 0.4 parts of polycarboxylic acid water-reducing agent and 6.7 parts of water.

[0056] Preparation methods include:

[0057] 1) After the high-titanium slag is naturally dried, it is crushed into a particle size of less than 1.18mm in a crusher. Then sieve into three grades of 1.18mm-0.6mm, 0.6mm-0.3mm, and 0.3mm-0.15mm for later use.

[0058] 2) In parts by mass, 56.5 parts of high-titanium slag sand, 20.16 parts of cement, 10.08 parts of fly ash, 3.36 parts of silica fume, 2.8 parts of steel fiber, 0.4 parts of water reducing agent and 6.7 parts of water are mixed into powder;

[0059] 3) After mixing the powder and steel fiber in step 2 evenly, add water and stir evenly, then slowly add the high-titanium slag sand obtained in step 1, stir, injection ...

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Abstract

The invention provides high-titanium slag sand active powder concrete and a preparation method thereof. The preparation method comprises the steps: drying high-titanium slag, crushing, and grading toobtain graded high-titanium slag sand; uniformly mixing cement, fly ash, silica fume and steel fibers, then adding water and a water reducing agent, and uniformly mixing to obtain slurry; and mixing the graded high-titanium slag sand with the slurry, molding, and curing to obtain the active powder concrete, wherein the reactive powder concrete is prepared from the following components in parts bymass: 55 to 65 parts of high-titanium slag sand, 15 to 24 parts of cement, 5 to 8 parts of fly ash, 2.5 to 4 parts of silica fume, 2 to 5.5 parts of steel fiber, 4.5 to 8.5 parts of water and 0.5 to 1.0 part of a water reducing agent. The product prepared through the method is high in compressive strength and breaking strength, can be used for preparing underground railway channels and sleepers, can also be applied to sponge city construction, underground pipelines, prefabricated assembly pipe galleries and other engineering structures, and is wide in application range.

Description

technical field [0001] The invention belongs to the application field of high-performance building materials and solid waste in high-performance concrete, and specifically relates to a high-titanium slag-sand active powder concrete and a preparation method thereof. Background technique [0002] With the development of engineering structures in the direction of large span, super high-rise, heavy load, etc., ordinary concrete has been difficult to meet the needs of engineering construction. At the same time, in recent years, domestic and foreign concrete projects, such as bridges, houses, roads, etc., have continuously experienced quality problems, which has also promoted people's attention and research on high-performance concrete. [0003] Reactive Powder Concrete (RPC) is a new type of ultra-high performance concrete successfully developed in France by Pierre Richard et al. in the 1990s. The concrete is prepared by using active powder and fine aggregate as raw materials ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/02C04B18/14
CPCC04B28/021C04B28/04C04B18/144C04B2201/20C04B2201/50C04B2111/00017C04B18/08C04B18/146C04B14/48C04B2103/302C04B22/002Y02W30/91
Inventor 李军卢忠远李晓英牛云辉
Owner SOUTHWEAT UNIV OF SCI & TECH
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