Non-calcinated solid waste high-activity mineral admixture and preparation method therefor

A technology of solid waste and mineral admixture, which is applied in the field of building materials, can solve the problems of inconspicuous competitive advantages of concrete blocks in the market, loss of strength of magnesite base, and reduced quality of pressed bricks, so as to meet the requirements of sustainable recycling and sustainable development. Development, improvement of work performance, low energy consumption in processing and production

Inactive Publication Date: 2016-03-02
WUHAN TIANYICHENG RENEWABLE RESOURCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent "Brick and method made from solid waste regeneration" (authorized announcement number: CN102603265B) discloses a method for preparing pressed bricks by using magnesium oxide, sodium phosphate, water reducing agent, high-efficiency compounding agent and solid waste residue. This solid waste utilization method is straightforward and simple, similar to the preparation of recycled concrete, but the use of high-efficiency compounding agents, water reducing agents, magnesium oxide, and phosphate curing agents greatly increases its cost, and at the same time, magnesite bases are prone to occur when exposed to water. Loss of strength, resulting in reduced quality of presse...

Method used

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  • Non-calcinated solid waste high-activity mineral admixture and preparation method therefor
  • Non-calcinated solid waste high-activity mineral admixture and preparation method therefor
  • Non-calcinated solid waste high-activity mineral admixture and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A non-calcined solid waste highly active mineral admixture, which is made by grinding waste mortar powder, finely ground steel slag powder, desulfurized gypsum and waste rock powder, and the mass percentage of each component is:

[0043]

[0044]

[0045] Specific steps are as follows:

[0046] 1) Use waste concrete as raw material, use jaw crusher to crush it, and then take powder with a particle size of less than 2.36mm to grind until the specific surface area is 350-450m 2 / kg, 200 mesh sieve residue is less than 10%, get waste mortar powder for future use;

[0047] 2) Grinding the marble processing stone waste until its specific surface area is 300-400m 2 / kg, 200 mesh sieve residue is less than 15%, to get waste rock powder;

[0048] 3) Weigh each component according to the above ratio, put the waste rock powder in the roller mill, then add finely ground steel slag powder and waste mortar powder into the roller mill for mixing and grinding, until the output...

Embodiment 2

[0051] A non-calcined solid waste highly active mineral admixture, which is made by grinding waste mortar powder, finely ground steel slag powder, desulfurized gypsum and waste rock powder, and the mass ratio of each component is the same as that of Example 1 , The grinding process is roughly the same as in Example 1, except that the grinding time of waste rock powder, ground steel slag powder and waste mortar powder is extended to 3h.

[0052] The non-calcined solid waste high-activity mineral admixture prepared in this example was subjected to an activity test, and the results showed that the water demand ratio was 92%, the activity index was 90%, the fluidity ratio was 105%, and the fully automatic specific surface area measurement The specific surface area measured by the instrument is 438m 2 / kg.

Embodiment 3

[0054] A non-calcined solid waste high-activity mineral admixture, which is made of waste mortar powder, ground steel slag powder, desulfurized gypsum and waste rock powder through grinding, and the mass ratio of each component is:

[0055]

[0056] Its grinding process is with embodiment 1.

[0057] The non-calcined solid waste high-activity mineral admixture prepared in this example was subjected to an activity test, and the results showed that its water demand ratio was 85%, its activity index was 82%, and its fluidity ratio was 115%. Fully automatic specific surface area determination The specific surface area measured by the instrument is 385m 2 / kg.

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Abstract

The invention discloses a non-calcinated method produced high-activity regenerated mineral admixture by utilizing multiple solid wastes such as waste building mortar, fine grinded steel slag, desulphurized gypsum and waste stone dust as well as a preparation method therefor. The mineral admixture comprises the following components in doped percentages: 32-60% of waste mortar powder, 15-25% of fine grinded steel slag, 4-8% of desulphurized gypsum and 20-35% of waste stone dust. The water demand ratio of the regenerated high-activity mineral admixture is 70-90%; the initial working performance of the concrete can be improved; the activity index is 80-100%; the specific surface area is 350-450 sq./kg; and the mineral admixture has the characteristics of a coagulation time controllability, high early strength, stable volume performance and the like.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a non-calcined solid waste high-activity mineral admixture and a preparation method thereof. Background technique [0002] At present, the annual discharge of construction waste in my country exceeds 200 million tons. As urban construction progresses from extensional development to connotative large-scale old city renovation, the amount of construction waste generated from new construction waste and old building demolition and renovation in my country will gradually increase, and the recycling of construction waste has become an urgent problem to be solved. . The main treatment methods of construction waste are landfill or stacking, which occupy a large amount of land resources and endanger the environment. Domestic research is mainly to separate waste concrete aggregates to prepare recycled concrete, or to grind them to prepare fillers to reinforce roadbeds, but th...

Claims

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Application Information

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IPC IPC(8): C04B18/30
CPCY02W30/91
Inventor 查剑平黄修林邵春华张万军廖晓民付天全张炳超查茜
Owner WUHAN TIANYICHENG RENEWABLE RESOURCES CO LTD
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