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A kind of alkali slag base roadbed filling material

A technology for alkali slag-based roadbed and alkali slag, which is applied in the field of building materials, can solve the problems of unqualified CBR value, environmental pollution by alkali slag, etc., and achieves the effects of qualified engineering indicators, overcoming serious environmental pollution, and simple production process.

Active Publication Date: 2016-08-24
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of alkali slag base roadbed filling material, which is to use a large amount of waste alkali slag and fly ash to add alkali slag and fly ash as an active agent that acts as an exciter. It overcomes the defect that the existing subgrade filling materials are generally unqualified for the CBR value used to characterize the stability of road engineering soil, and overcomes the defect that industrial waste alkali slag pollutes the environment, and effectively utilizes a large amount of alkali slag waste. turn waste into treasure

Method used

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  • A kind of alkali slag base roadbed filling material
  • A kind of alkali slag base roadbed filling material
  • A kind of alkali slag base roadbed filling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Get the actual required amount of alkali slag and fly ash for construction projects, and mix evenly with 80% (quality) of alkali slag and 20% (quality) of fly ash, and then add 1% ( mass) of sodium sulfate as an active agent, and then stir evenly to obtain a kind of alkali slag-based roadbed filling material.

[0016] The unconfined compressive strength measurement result of a kind of alkali slag base subgrade filling material that the present embodiment makes is as follows:

[0017] An alkali slag-based subgrade filling material prepared in this example has high compressive strength, and the compressive strength of the 28-day-old sample is increased compared with that of the 7-day-old sample. Table 1 lists the unconfined compressive strength of an alkali slag-based roadbed filling material prepared in this example. The measured unconfined compressive strength is 2.1MPa-2.42MPa, which can meet the corresponding engineering bearing capacity requirements such as roadbed ...

Embodiment 2

[0021] Get the actual required amount of alkali slag and fly ash for construction projects, and mix evenly with 70% (quality) alkali slag and 30% (quality) fly ash, and then add 3% ( mass) of sodium sulfate as an active agent, and then stir evenly to obtain a kind of alkali slag-based roadbed filling material.

[0022] The unconfined compressive strength measurement result of a kind of alkali slag base subgrade filling material that the present embodiment makes is as follows:

[0023] An alkali slag-based subgrade filling material prepared in this example has high compressive strength, and the compressive strength of the 28-day-old sample is increased compared with that of the 7-day-old sample. Table 2 lists the unconfined compressive strength of a kind of alkali slag-based roadbed filling material prepared in this embodiment. The measured unconfined compressive strength values ​​range from 2.93MPa to 3.74MPa, which can meet the corresponding engineering bearing capacity requ...

Embodiment 3

[0027] Get the actual required amount of alkali slag and fly ash for construction projects, and mix evenly with 90% (quality) alkali slag and 10% (quality) fly ash, then add 5% ( mass) of sodium sulfate as an active agent, and then stir evenly to obtain a kind of alkali slag-based roadbed filling material.

[0028] The unconfined compressive strength measurement result of a kind of alkali slag base subgrade filling material that the present embodiment makes is as follows:

[0029] An alkali slag-based subgrade filling material prepared in this example has high compressive strength, and the compressive strength of the 28-day-old sample is increased compared with that of the 7-day-old sample. Table 3 lists the unconfined compressive strength of an alkali slag-based roadbed filling material prepared in this example. The measured unconfined compressive strength is 3.32MPa-4.62MPa, which can meet the corresponding engineering bearing capacity requirements such as roadbed filling. ...

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Abstract

The invention discloses an alkali residue-based roadbed filling material and relates to the building material of alkali-production industrial waste compositions. The alkali residue-based roadbed filling material is a composition which consists of 70wt%-90wt% of alkali residues, 10wt%-30wt% of coal ash and an activator which accounts for 1wt%-8wt% of the total amount of the alkali residues and the coal ash. A preparation method of the alkali residue-based roadbed filling material comprises the following steps: uniformly mixing the needed dosage of alkali residues and the coal ash in percentage by mass to obtain a mixture; and then, adding the activator which accounts for 1wt%-8wt% of the total mass of the mixture to uniformly stir to obtain the alkali residue-based roadbed filling material. The roadbed filling material disclosed by the invention not only can overcome the defect that the CBR value that represents the stability of the road engineering soil of the existing roadbed filling material is generally unqualified, but also can overcome the defect that the environment is contaminated by the industrial waste alkali residues; and moreover, a great deal of alkali residues are effectively utilized and changed into things of value.

Description

technical field [0001] The technical proposal of the invention relates to a building material composed of industrial waste from soda making, in particular to a filling material for an alkali slag-based roadbed. Background technique [0002] In the research and development of existing roadbed filling materials, people are constantly seeking and developing roadbed filling materials based on waste materials. "Research on Geotechnical Engineering and Environmental Characteristics of Soda Slag and Fly Ash Mixture" (Yan Shuwang, Hou Jinfang, Liu Run. Rock and Soil Mechanics. 2006.27(12): 2305-2308) analyzed a kind of alkali slag and Physical index and mechanical index of calcium ash mixture; "Experimental Research on Engineering Characteristics of Industrial Waste Alkali Slag" (Zhao Hongliang. Ganggong Technology. 2000. (4): 49-50) introduces the alkali slag itself or alkali slag and other Materials (such as fly ash and cement, etc.) are mixed as the characteristics of engineerin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/04
CPCY02W30/91
Inventor 刘春原陶明江左丽明朱楠王文静赵献辉赵梦璇张晓晓赵越闫虎成
Owner HEBEI UNIV OF TECH
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