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Lightweight aggregate pretreatment method and its device

A pretreatment device and light aggregate technology, applied in clay preparation devices, cement mixing devices, chemical instruments and methods, etc., can solve the problems of inability to maintain free water in concrete mixture, poor pumpability of light aggregate concrete, light aggregate The problem of slow material pretreatment speed is solved, and the effect of improving pumping construction performance, improving pretreatment efficiency, and good workability of pumping is achieved.

Inactive Publication Date: 2007-11-28
北京东方建宇混凝土科学技术研究院有限公司 +2
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Problems solved by technology

[0004] The object of the present invention is to provide a light aggregate pretreatment method and its device, to solve the problem that the light aggregate pretreatment speed is too slow, the efficiency is low, the water absorption of light aggregate is large, and the free water in the concrete mixture cannot be maintained. Technical issues of water volume, poor pumpability of light aggregate concrete

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  • Lightweight aggregate pretreatment method and its device
  • Lightweight aggregate pretreatment method and its device
  • Lightweight aggregate pretreatment method and its device

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Embodiment

[0018] Example: Light aggregate preparation

[0019] serial number

[0020] This light aggregate pretreatment method, the above-mentioned light aggregate is shale ceramsite, clay ceramsite, natural pumice particles or natural vermiculite particles, is characterized in that it has the following steps:

[0021] Step 1, pre-wetting the light aggregate, putting the light aggregate into a container and adding water to make the water absorption of the light aggregate 60% to 80%; the pre-wet of the light aggregate is pre-wet under pressure. The above-mentioned pressurized pre-wet method is to put the light aggregate into the light aggregate concrete pretreatment device, which is a closed pressure vessel, and the volume can be customized according to the needs.

[0022] Referring to Fig. 1-3, the above-mentioned airtight pressure vessel is in the shape of a tank, and the tank body 4 of the airtight pressure vessel is supported on the chassis 1 of the concrete mixer truck, an...

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Abstract

The present invention is light aggregate pre-treating process and apparatus. The light aggregate is first pressurized and humidified in a sealed pressure container as the light aggregate pre-treating apparatus in the pressure of 5-8 MPa for 30-120 min to reach water absorbing rate of 60-80 %; and then shell forming treated through mixing with cement for 90-180 min, with the cement adding amount being 50-100 kg for 1 cu m of aggregate without free water, to form watertight shell in the surface of the aggregate. The present invention has high aggregate pre-treating speed, high efficiency, and capacity keeping free water amount and maintaining high pumpability of the concrete.

Description

(1) Technical field [0001] The invention relates to a pretreatment method and device for preparing concrete materials. (2) Background technology [0002] Lightweight, high-strength, and durable are the development directions of concrete technology. The development of lightweight aggregate concrete is the main way to reduce the weight of structures and make concrete develop in light-weight and high-strength aspects. Light aggregate concrete has been researched and applied in my country for nearly 40 years. Due to the limitations of technology, economy and construction concept, the application space and scope of this technology are limited. In recent years, the development of the national economy has led to the rapid development of the construction industry, especially the development of high-rise, super high-rise buildings, marine buildings, long-span buildings and intelligent buildings. Lightweight aggregate concrete is characterized by its light weight and good thermal insu...

Claims

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Application Information

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IPC IPC(8): B28C5/46B28C5/42
Inventor 路来军马雪英王安领
Owner 北京东方建宇混凝土科学技术研究院有限公司
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