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Concrete admixture developed from sulfur-fixing ash and preparation method thereof

A technology of sulfur-fixing ash and admixture, which is applied in the field of concrete, can solve the problems of land occupation and achieve the effects of low cost, promotion of hydration, and large amount of admixture

Inactive Publication Date: 2020-09-11
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

At the same time, the pH value of the system is increased by adding an alkaline activator, so that the components in the material are dissolved and reorganized to form a new strength plate, thereby realizing the maximum mixing of the concrete admixture developed by the sulfur-fixed ash in the concrete, and solving the problem of the power plant The problem of ash and slag stacking occupying land is at the same time, reducing the economic burden of enterprises, and at the same time realizing the transformation of waste into wealth, large-scale and resource utilization of solid waste

Method used

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  • Concrete admixture developed from sulfur-fixing ash and preparation method thereof
  • Concrete admixture developed from sulfur-fixing ash and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A concrete admixture developed with sulphur-fixing ash and a preparation method thereof, comprising the following steps (see attached figure 1 ):

[0030] (1) Pretreatment: pretreatment of the original solid sulfur slag from the power plant to obtain pretreatment material 1;

[0031] (2) Alkali excitation: The undisturbed sulfur-fixing ash from the power plant is pneumatically transported to the bucket elevator of the batching warehouse, lifted by the bucket elevator to the batching warehouse, measured by the rotor scale at the bottom of the batching warehouse, and then fed through the activator warehouse 1. Add 1.0-1.5% alkaline activator to the undisturbed sulfur-fixing ash; add 1.0-1.5% alkaline activator to pretreatment material 1 through activator library 2;

[0032] (3) Wall-breaking shaping and sorting: the undisturbed sulfur-fixing ash added with 1.0-1.5% alkaline activator is sent to the ultra-fine powder tube mill from the inclined groove for grinding, and th...

Embodiment 2

[0035] A concrete admixture prepared by using the sulfur-fixing ash slag prepared in Example 1 was used to prepare concrete, and the performance of the trial-prepared concrete was tested.

[0036] 1. Grouping situation:

[0037] ① Control group: C30 concrete is used as the control group, and its basic mix composition is shown in Table 1;

[0038] 2. experimental group: the concrete prepared with the concrete admixture of a kind of sulphur-fixing ash slag prepared in Example 1 is an experimental group, and its mixing ratio composition is shown in Table 2;

[0039] Table 1 The composition of the basic mix ratio of the control group

[0040] P.0.42.5 Cement water medium sand gravel admixture 360kg 160kg 750kg 1140kg 9.0kg

[0041] Table 2 Mixing ratio composition of experimental group

[0042]

[0043] 2. Concrete performance testing:

[0044] The testing basis is: "Standard for Test Method of Mechanical Properties of Ordinary Concrete" GB / ...

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Abstract

The invention provides a concrete admixture developed from sulfur-fixing ash and a preparation method thereof. The concrete admixture developed from sulfur-fixing ash is composed of sulfur-fixing ash,sulfur-fixing slag and an alkaline excitant. Meanwhile, the invention also provides a preparation method of the concrete admixture developed from the sulfur-fixing ash, and the method comprises the following steps of: pretreatment, alkali excitation, wall-breaking shaping (grinding), sorting and homogenization. The concrete admixture prepared from the sulfur-fixing ash provided by the invention realizes large-mixing-amount and large-batch use of the sulfur-fixing ash in concrete, turns waste into wealth, realizes large-scale and resource utilization of solid wastes, and finally realizes unification of production benefits, environmental benefits, economic benefits and social benefits.

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 amount of solid waste such as coal ash and slag produced has also increased year by year. Among them, traditional fly ash and slag have become an important raw material in the production of cement and concrete, and the proportion of resource utilization has increased year by year. , low calorific value fuels and other differences, and the application of fly ash and slag produced by pulverized coal furnaces are completely different. The f-CaO produced by the residual sulfur-fixing agent will appear in the sulfur-fixing ash and slag. 4 SO exists in the form 3 The product after solidification. These substances have relatively low activity, and will generate expa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/06C04B20/02
CPCC04B40/0039C04B20/023
Inventor 任思谦张保王巍韩桂英张元庆朱祥杰马全章陈辉李英泉李剑钊吴雪松吴伟
Owner 陕西正元环保科技有限公司