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Method for preparing foamed concrete by using coal gangue

A technology of foamed concrete and coal gangue, which is applied in the field of construction engineering, can solve the problems that foamed hydroconcrete has not yet been discovered, and the technology has been reported in reports, so as to achieve the effects of increasing additional utilization value, reducing environmental pollution, and reducing costs

Inactive Publication Date: 2016-02-03
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, up to now, there is no report on the related technology of using coal gangue to prepare foamed hydraulic concrete.

Method used

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  • Method for preparing foamed concrete by using coal gangue
  • Method for preparing foamed concrete by using coal gangue
  • Method for preparing foamed concrete by using coal gangue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method that present embodiment utilizes coal gangue to prepare foamed concrete comprises the following steps:

[0026] Step 1, using a jaw crusher to crush the gangue, the crushing rate is 250r / min, and the crushing time is 12min, then the crushed coal gangue is placed in a ball mill for ball milling, the ball milling rate is 30r / min, and the ball milling time Obtain coal gangue powder for 30min;

[0027] Step 2. Put the coal gangue powder described in step 1 in a muffle furnace, heat it for 2.5 hours at a temperature of 800°C for activation treatment, and obtain activated coal gangue powder after natural cooling;

[0028] Step 3, after mixing the soybean flour and deionized water uniformly in a mass ratio of 1:8, stirring for 4 hours at a temperature of 90° C. and a stirring rate of 3000 r / min to obtain a foaming agent;

[0029] Step 4. Mix the activated coal gangue powder with cement, sand, gravel and polycarboxylate water reducer in a mass ratio of 25:75:19:307....

Embodiment 2

[0032] The method that present embodiment utilizes coal gangue to prepare foamed concrete comprises the following steps:

[0033] Step 1, adopt jaw crusher to crush coal gangue, the crushing rate is 200r / min, and the crushing time is 15min, and then the crushed coal gangue is placed in a ball mill for ball milling, the ball milling rate is 25r / min, and the ball milling time is Obtain coal gangue powder for 40min;

[0034] Step 2. Put the coal gangue powder described in step 1 in a muffle furnace, heat it for 2 hours at a temperature of 700° C. for activation treatment, and obtain activated coal gangue powder after natural cooling;

[0035] Step 3, after mixing the soybean flour and deionized water uniformly in a mass ratio of 1:8, stirring for 5 hours at a temperature of 80° C. and a stirring rate of 3000 r / min to obtain a foaming agent;

[0036] Step 4. Mix the activated coal gangue powder with cement, sand, gravel and polycarboxylate water reducer in a mass ratio of 25:70:1...

Embodiment 3

[0039] The method that present embodiment utilizes coal gangue to prepare foamed concrete comprises the following steps:

[0040] Step 1, using a jaw crusher to crush the gangue, the crushing rate is 200r / min, and the crushing time is 10min, then the crushed coal gangue is placed in a ball mill for ball milling, the ball milling rate is 25r / min, and the ball milling time Obtain coal gangue powder for 40min;

[0041] Step 2. Put the coal gangue powder described in step 1 in a muffle furnace, heat it for 2.5 hours at a temperature of 700°C for activation treatment, and obtain activated coal gangue powder after natural cooling;

[0042] Step 3, after mixing the soybean flour and deionized water uniformly in a mass ratio of 1:5, stirring for 5 hours at a temperature of 90° C. and a stirring rate of 3000 r / min to obtain a foaming agent;

[0043] Step 4. Mix the activated coal gangue powder with cement, sand, gravel and polycarboxylate water reducer in a mass ratio of 30:80:20:320:...

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Abstract

The invention provides a method for preparing foamed concrete by using coal gangue. The method comprises the following steps: I, crushing the coal gangue by adopting a jaw crusher, and then carrying out ball milling on the crushed coal gangue in a ball mill to obtain coal gangue powder; II, activating the coal gangue powder in a muffle furnace; III, mixing and stirring bean powder and deionized water to obtain a foaming agent; and IV, uniformly mixing the coal gangue powder, cement, sand, broken stone and a water reducing agent to obtain a mixture, then uniformly mixing the mixture and water to obtain slurry, adding the foaming agent into the slurry, uniformly mixing, pouring and forming, demolding and maintaining to obtain the foamed concrete. The coal gangue is adopted as a raw material, the coal gangue is activated and then is mixed with the foaming agent to prepare the foamed concrete, and a product has the characteristics of light weight and good sound insulation and heat insulation effect. The coal gangue is used for preparing the foamed concrete, so that not only is the additional value of the coal gangue sufficiently realized, but also the environmental pollution caused by the coal gangue can be reduced.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a method for preparing foamed concrete from coal gangue. Background technique [0002] Cement concrete is the most important material in construction engineering. Since the advent of Portland cement in the 19th century, concrete has been used as a building material for more than 100 years. So far, it is still the largest building material in the world. After a long history of development, cement concrete technology has become increasingly mature and perfect, but the inherent defects of Portland cement are also increasingly revealed. As an important component of concrete, cement emits a large amount of CO into the atmosphere during the production process. 2 , the world's annual CO in 1999 2 The emissions are about 10 billion tons, of which cement production accounts for about 1 / 10, causing adverse effects such as environmental pollution, greenhouse e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B18/12C04B111/40
CPCY02W30/91
Inventor 杨建利杜美利高战辉杨小刚
Owner XIAN UNIV OF SCI & TECH
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