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Superfine regeneration powder compound geopolymer cementing material

A geopolymer and recycled powder technology, which is applied in solid waste management, cement production, sustainable waste treatment, etc., can solve problems such as the inability to more effectively tap the utilization methods and potential technical value of recycled powder from construction waste. Achieve the effects of increasing value and use value, saving large investment, promoting circular economy, energy saving and emission reduction

Active Publication Date: 2014-05-14
北京联绿技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the current construction waste recycled powder preparation technology only grinds the construction waste to a specific surface area of ​​300-500m 2 / kg of ordinary fineness powder state, the activity coefficient of the recycled powder prepared from this is only 50%-70%, which is between the active and inactive mixed materials, and the recycled powder from construction waste cannot be excavated more effectively. The way of utilization and potential technical value of body

Method used

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  • Superfine regeneration powder compound geopolymer cementing material
  • Superfine regeneration powder compound geopolymer cementing material

Examples

Experimental program
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Effect test

preparation example Construction

[0029] 1. Preparation and performance test of highly active ultrafine recycled powder from waste bricks

[0030] First, the waste brick construction waste is cleaned by crushing, iron removal, mud removal, and sundry removal, and then the clean waste brick is broken into small particles, which are sent to the ultrafine grinding equipment for ultrafine grinding of the waste brick. The performance test of the prepared superfine waste brick recycled powder was carried out, and the test results are shown in Table 1. Among them, the ignition loss, sulfur trioxide content and free calcium oxide content refer to GB / T176; the stability test refers to GB / T1346; the specific surface area test refers to GB / T8074; the activity index refers to pulverized coal according to the method of GB / T17671 Ash activity index test was carried out. The performance test and analysis results show that the superfine waste brick recycled powder has a high specific surface area, high activity, good stabili...

Embodiment

[0040] According to above-mentioned embodiment, prepared two kinds of composite geopolymer gelling materials respectively according to the mix ratio in the following table 3:

[0041] Table 3 Mixing ratio of composite geopolymer cementitious materials

[0042]

[0043] With reference to the cement test method stipulated in GB / T1346, the standard consistency water consumption, setting time and stability of the composite geopolymer cementitious materials of Examples 1 and 2 of the present invention and corresponding grades of cement were tested.

[0044] According to the cement mortar strength test method specified in GB / T17671-1999, the compressive strength of the composite geopolymer cementitious materials and corresponding grades of cement in Examples 1 and 2 of the present invention was tested.

[0045] The measurement results are shown in Table 4

[0046] Table 4 The performance of composite geopolymer cementitious material of the present invention and corresponding gra...

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Abstract

The invention provides a superfine regeneration powder compound geopolymer cementing material. The superfine regeneration powder compound geopolymer cementing material is prepared from raw materials comprising superfine waste brick regeneration powder, superfine slag powder, desulfurization gypsum, sodium metasilicate and potassium hydroxide according to a weight ratio of (40-70):(30-60):(2-8):(1-4):(1-4). The invention also provides a novel application of building rubbish regeneration powder. According to the novel application, the building rubbish regeneration powder is at least used together with an active excitation agent and prepared into a compound geopolymer cementing material. According to the superfine regeneration powder compound geopolymer cementing material, no portland cement clinker is used or few portland cement clinkers are used; and the superfine regeneration powder compound geopolymer cementing material is capable of making full use of solid waste and building rubbish and greatly improving use value of the building rubbish, is free of burning process, green and environment-friendly and is capable of providing a novel method for recycling the building rubbish.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metal gelling materials. Specifically, it relates to an inorganic non-metal geopolymer gelling material. Background technique [0002] With the development of urban construction, construction waste has become the main component of urban waste in my country, accounting for 30%-40% of the total amount of urban waste. Although there have been reports on the disposal and utilization of construction waste into recycled aggregates, the utilization rate of this method is low and the construction waste cannot be fully consumed. Therefore, technical issues such as effectively disposing of these construction wastes, especially waste brick construction waste, and improving the effectiveness and proportion of their use have become important issues in the construction field and the environmental protection field. The crushing and grinding of construction waste into recycled powder, which can be used as...

Claims

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Application Information

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IPC IPC(8): C04B7/24
CPCC04B28/006Y02P40/10Y02W30/91C04B18/165
Inventor 李建勇尚百雨马雪英程东惠
Owner 北京联绿技术集团有限公司
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