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Method for wet spraying with extra-dry or ultra-dry stiff concrete

A technology of dry hard concrete and wet spraying, which is applied in earthwork drilling, processing of building materials, wellbore lining, etc. It can solve the problems of heavy unfavorable manual operation and large spray gun, so as to reduce the consumption, change the large dust and improve the spraying efficiency high effect

Active Publication Date: 2012-01-04
陕西金石混凝土科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At least one water atomization device and a large-volume mixing chamber are added to the spray gun, which reduces the rebound from 60% of the dry method to almost zero. However, this method is still a dry method because of the use of dry powder quick-setting agent. , and the spray gun may be too large and too heavy for manual operation

Method used

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  • Method for wet spraying with extra-dry or ultra-dry stiff concrete
  • Method for wet spraying with extra-dry or ultra-dry stiff concrete
  • Method for wet spraying with extra-dry or ultra-dry stiff concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: refer to figure 1 .

[0019] Step 1, first make extra-dry or ultra-dry hard concrete mixture in the mixer, transport it to the construction site by tank truck or dump truck, and add it into the hopper of the dry spraying machine or wet spraying machine manually or mechanically;

[0020] Step 2, using compressed air to send the concrete mixture to the delivery pipe through a dry sprayer or a wet sprayer;

[0021] Step 3: A certain amount of water is controlled by a flow meter and a valve and added into the delivery pipe through an atomizer to form an extra-dry or super-dry hard concrete mixture, which is hydrated in the delivery pipe to become plastic concrete.

[0022] Step 4: After the plastic concrete in the delivery pipe interacts with the liquid accelerator pumped in from the nozzle, it is quickly sprayed on the construction site.

Embodiment 2

[0023] Embodiment 2: refer to figure 2 .

[0024] Step 1, first make extra-dry or ultra-dry hard concrete mixture in the mixer, transport it to the construction site by tank truck or dump truck, and add it into the hopper of the dry spraying machine or wet spraying machine manually or mechanically;

[0025] In step 2, a certain amount of water is controlled by a flow meter and a valve and added to the atomizer connected to the air pipe to form a concrete mixture.

[0026] Step three, the wind with atomized water sends the concrete mixture to the delivery pipe through the dry sprayer or wet sprayer.

[0027] Step 4: After the dry mix absorbs water in the delivery pipe and reaches the plastic state, it reacts with the liquid accelerator pumped in from the nozzle, and sprays it on the construction site rapidly.

Embodiment 3

[0028] Embodiment 3: refer to image 3 .

[0029] Step 1, first make extra-dry or ultra-dry hard concrete mixture in the mixer, transport it to the construction site by tank truck or dump truck, and add it into the hopper of the dry spraying machine or wet spraying machine manually or mechanically;

[0030] In step 2, a certain amount of water is controlled by a flow meter and a valve, and added into the dry hard concrete in the hopper through an atomizer to form a concrete mixture.

[0031] Step 3, using compressed air to send the water-added concrete mixture to the delivery pipe through a dry sprayer or a wet sprayer.

[0032] Step 4: After the plastic concrete in the delivery pipe interacts with the liquid accelerator pumped in from the nozzle, it is quickly sprayed on the construction site.

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Abstract

The invention discloses a method for wet spraying with extra-dry or ultra-dry stiff concrete. The method comprises the following steps: adding extra-dry or ultra-dry stiff concrete manufactured by a mixer to a dry shotcreting machine or a wet shotcreting machine; accessing water from a feed delivery pipe at any point within 2 / 3 length away from a spraying machine by an atomizer, or accessing water from an air supply pipe of the spraying machine, or directly adding water to a hopper of the spraying machine according to the water-cement ratio of 1:0.3-0.5 so as to form a plastic concrete mix. The plastic concrete in the feed delivery pipe is quickly sprayed on construction parts after reacting with a liquid accelerator pumped at a nozzle. Compared with the existing spraying technologies, the method respectively reduces resilience and dust by 50%, reduces consumption of the accelerator by 30-50%, and guarantees the strength of sprayed concrete.

Description

technical field [0001] The invention relates to a concrete wet spraying construction method, in particular to a wet spraying method using extra-dry or super-dry hard concrete. Background technique [0002] Shotcrete is the use of spraying machinery, using compressed air or other power, adding accelerators to the concrete mixed according to a certain mix ratio, and spraying it on the rock surface and structures at high speed through the delivery hose under the action of high-pressure wind. It is a concrete construction method that can quickly set and harden. [0003] Document 1 "Dry, wet and wet shotcrete methods "Drilling Fluid and Geotechnical Engineering Slurry" China University of Geosciences Press 2002 edition Wu Xiaoming, Hu Yule, He Bingxin." discloses a dry, wet and wet shotcrete method . [0004] Dry-process shotcrete is dry-mixed raw materials without adding water. The construction site is dusty, which seriously endangers the health of workers. The rebound is larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E02D15/00E04G21/02
Inventor 王宏军
Owner 陕西金石混凝土科技发展有限公司