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Steel slag mixed solidified soil mass road base material

A technology for road base and solidified soil, which is applied in the field of steel slag mixed solidified soil road base materials, can solve the problems of unenvironmental processing, insufficient performance of road base materials, and high production costs, achieve comprehensive utilization, and solve the problem of earthwork efflux. Difficulty, good water stability

Inactive Publication Date: 2019-11-05
上海麦酷网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem of expansion when using steel slag mixed and solidified soil as the road base material, as well as the problems of insufficient performance of the road base material, high production cost, and non-environmental protection during the treatment process, the invention provides a steel slag mixed and solidified soil road base material

Method used

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  • Steel slag mixed solidified soil mass road base material
  • Steel slag mixed solidified soil mass road base material
  • Steel slag mixed solidified soil mass road base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] According to the above test procedures, 50 parts of steel slag, 50 parts of soil, 5 parts of Portland cement, 40 parts of micropowder additive and 0.02 parts of modifier were selected, and under the condition of optimal moisture content, the expansion ratio test piece and For unconfined specimens, the final expansion rate after 10 days is 0.21%<2% (the "Steel Slag for Road" specification requires that the expansion rate in a high-temperature water bath for 10 days is less than 2%), and its 7-day compressive strength is 4.54MPa. 92%. It has met the specification level 1 road strength requirements.

[0053] Comparative Test 1: Following the same steps as Example 1, the difference is to remove the intake of micro-powder additives, and also under the best moisture content and 98% compaction, the 10-day expansion rate is measured as 3.12% > 2% according to the specification requirements , its 7-day unconfined compressive strength is 2.25MPa, and its water stability coeffici...

Embodiment 2

[0059] According to the above test procedure, the specific gravity of steel slag and soil is 40 parts of steel slag, 60 parts of soil, 5 parts of Portland cement, 0.02 parts of modifier, and 50 parts of micro-powder additives are added, and the 10-day expansion rate is measured to be 1.0%. <2%.

[0060] Comparative test 1: Follow the same steps as Example 2, except that the amount of micropowder additive is changed to 40 parts of micropowder additive, and the 10-day expansion rate is 1.2%<2%.

[0061]Comparative test 2: Follow the same steps as in Example 2, except that the amount of micropowder additive is changed to 30 parts of micropowder additive, and the 10-day expansion rate is 1.8%<2%.

[0062] Under the above-mentioned dosage of micropowder additives, the expansion rate of steel slag mixed and solidified soil reaches the optimum.

Embodiment 3

[0064] According to the above test procedures, 60 parts of steel slag, 40 parts of soil, 5 parts of Portland cement, 40 parts of micropowder additive and 0.02 part of modifier were selected, and the 7-day unconfined compressive strength was measured to be 5.09MPa.

[0065] Comparative Test 1: Following the same steps as in Example 3, except changing the mixing amount of steel slag and soil, adding 50 parts of steel slag and 50 parts of soil, the 7-day unconfined compressive strength was 4.54MPa.

[0066] Comparative Test 2: Follow the same steps as in Example 3, except that the amount of steel slag and soil is changed, 40 parts of steel slag and 60 parts of soil are added, and the 7-day unconfined compressive strength is 4.01 MPa.

[0067] Comparative Test 3: Following the same steps as in Example 3, except changing the mixing amount of steel slag and soil, adding 70 parts of steel slag and 30 parts of soil, the 7-day unconfined compressive strength was 2.32MPa.

[0068] Compa...

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Abstract

The invention belongs to the field of building material and solid waste treatment, and relates to a steel slag mixed solidified soil mass road base material as a road base material. The steel slag mixed solidified soil mass road base material is prepared from the following components in parts by weight: 50-70 parts of soil, 30-50 parts of steel slag, 30-50 parts of a micro powder additive, 3-5 parts of portland cement and 0.015-0.020 part of a modifier. The strength of a reasonably prepared waste steel slag mixed soil base reach 7 MPa, is much higher than that of traditional road base soil, includes the cement stabilized crushed stone strength, and has the early strength characteristic, and the unconfined compressive strength in the early 7 days is up to 70-80% of the final strength; the expansion rate of the steel slag is less than 2% of the standard specification, and the steel slag mixed solidified soil mass road base material can be used as fillers of various highways and road bases.

Description

technical field [0001] The invention belongs to the field of building materials and solid waste treatment, in particular to a steel slag mixed and solidified soil road base material. Background technique [0002] The use of steel slag as roadbed filler and pavement base material in road construction has been very common in foreign countries, but in practice, the expansion of steel slag is an important factor hindering the large-scale application of steel slag as roadbed filler. If the expansion of steel slag is effectively suppressed and eliminated, the application of steel slag will be widely promoted. There are many factors affecting the stability of steel slag, including adding lime, dolomite, and high-magnesium materials as slagging agents in order to remove impurities in the steelmaking process, and the free calcium oxide and free magnesium oxide produced in it affect its volume stability. [0003] Due to the insufficient slagging of the slagging agent added when smelt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2111/00482C04B2111/0075C04B2201/50C04B14/10C04B18/142C04B18/08C04B18/141C04B18/146C04B18/16C04B2103/0095C04B2103/408C04B2103/0068
Inventor 余楠
Owner 上海麦酷网络科技有限公司
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