Concrete admixture prepared from sulfur-fixing ash and sulfur-fixing residue, and preparation method thereof

A sulfur-fixing ash and admixture technology, applied in the field of concrete, can solve the problems of increasing the economic burden of ash yard maintenance costs, environmental problems, waste of land, etc., and achieve the effect of superior performance, low cost, and promotion of hydration

Inactive Publication Date: 2019-11-05
陕西正元环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the amount of sulfur-fixed ash and slag piled up to 100 million tons per year in the country. Traditional ash yards use rolling and stacking, which not only wastes a lot of land, but also increases the economic burden of enterprises for transportation and ash yard maintenance costs. more serious environmental problems

Method used

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  • Concrete admixture prepared from sulfur-fixing ash and sulfur-fixing residue, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A concrete admixture developed from sulfur-fixing ash and a preparation method thereof, comprising the following steps (see attached figure 1 ):

[0028] (1) Pretreatment: pretreat the undisturbed sulfur-fixing slag from the power plant to obtain pretreatment material 1

[0029] (2) Alkali excitation: Pneumatically convey the undisturbed sulfur-fixed ash from the power plant to the bucket elevator of the batching warehouse, lift it into the batching warehouse by the bucket elevator, measure it through the rotor scale at the bottom of the batching warehouse, and then pass it through the activator warehouse 1 to give Add 1.0-1.5% alkaline activator to the undisturbed sulfur-fixing ash; add an alkaline activator to the pretreatment material 1 in a ratio of 1.0-1.5% through the activator library 2;

[0030] (3) Wall breaking and shaping and sorting: the undisturbed sulfur-fixing ash added with 1.0-1.5% of the alkaline activator is sent into the superfine powder tube mill f...

Embodiment 2

[0033] A concrete admixture developed by using the sulfur-fixing ash prepared in Example 1 was used for trial batching of concrete, and the performance of the trial batched concrete was tested.

[0034] 1. Grouping situation:

[0035] ① Control group: take C30 concrete as the control group, and its basic mix composition is shown in Table 1;

[0036] ②Experimental group: the concrete that is prepared with the concrete admixture that a kind of sulfur-fixed ash slag that obtains in embodiment 1 is developed is experimental group, and its mixing ratio composition is shown in Table 2;

[0037] Table 1 The composition of the basic mix ratio of the control group

[0038] P.0.42.5 cement water Middle sand gravel Admixture 360kg 160kg 750kg 1140kg 9.0kg

[0039] Table 2 The composition of the experimental group mix ratio

[0040] P.0.42.5 cement Concrete admixture developed from sulfur-fixed ash water Middle sand gravel Admixtur...

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Abstract

The invention provides a concrete admixture prepared from sulfur-fixing ash and sulfur-fixing residue, wherein the preparation method comprises: pretreatment, alkali excitation, wall breaking shaping(grinding), sorting, and homogenization, and the prepared concrete admixture comprises, by weight, 50-70% of sulfur-fixing ash, 30-50% of sulfur-fixing residue, and 1.0-1.5% of an alkaline activator.According to the present invention, the concrete admixture prepared from sulfur-fixing ash and sulfur-fixing residue is provided, such that the large-doping and large-batch use of sulfur-fixing ash and sulfur-fixing residue in concrete is achieved, the waste is turned into treasure, the solid waste is subjected to large-scale and resource utilization, and the unification of production benefits, environmental benefits, economic benefits and social benefits is finally achieved.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a concrete admixture developed from sulfur-fixing ash and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of coal-fired power plants in my country, the discharge of solid waste such as coal ash and slag has also increased year by year. Among them, the traditional fly ash has become an important raw material in the production of cement and concrete, and the proportion of resources has increased year by year. , low calorific value fuel and other differences, and the application of fly ash generated by pulverized coal furnace is completely different. In the sulfur-fixing ash and slag, there will be f-CaO produced by the residual sulfur-fixing agent, and II-CaSO 4 form SO 3 The product after sulfur fixation. These substances have low activity. After hydration, they will generate expansive substances such as calc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/06C04B20/02
CPCC04B20/023C04B40/0039C04B18/062C04B22/062
Inventor 任思谦
Owner 陕西正元环保科技有限公司
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