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Composite soil for improving strength of blow-filling sand subgrade soil through fly ash, and test method thereof

A test method and fly ash technology, applied in the field of composite soil, can solve the problems of little understanding of the mechanical properties of dredger-filled sand-fly ash composite soil subgrade, high construction cost, and complicated raw materials, so as to improve the safety of the subgrade and reduce the Project cost and the effect of saving land resources

Inactive Publication Date: 2018-11-09
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The raw materials used in the above existing inventions are relatively complicated, and the construction cost is relatively high, and because the soil quality of the roadbed in different regions is different, it is not suitable for roadbed construction in individual regions
[0004] In traditional construction, a certain amount of fly ash is mixed into the subgrade soil according to experience, without qualitative analysis, and no mechanical property test of the composite soil, resulting in little understanding of the mechanical properties of the dredged sand fly ash composite soil subgrade

Method used

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  • Composite soil for improving strength of blow-filling sand subgrade soil through fly ash, and test method thereof
  • Composite soil for improving strength of blow-filling sand subgrade soil through fly ash, and test method thereof
  • Composite soil for improving strength of blow-filling sand subgrade soil through fly ash, and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A composite soil for improving the strength of dredger-filled sand subgrade soil by using fly ash, the composition of which comprises: fly ash,

[0042] For dredging sand, the ratio of the fly ash to the dredged sand is 1-5:5-9.

Embodiment 2

[0044]Utilize the composite soil of fly ash to improve the strength of dredged sand embankment soil according to embodiment 1, so

[0045] The ratio of the fly ash to the dredging sand is 1:9 or 2:8 or 3:7 or 4:6 or 5:5.

Embodiment 3

[0047] A composite method for improving the strength of dredged sand subgrade soil by using fly ash according to one of claims 1-2.

[0048] The proportion confirmation test method of composite soil, the method includes: first try to mix different mass proportions of fly ash and dredging sand, and then measure the optimum moisture content and maximum dry density of different proportions through standard compaction tests According to the optimal water content of each mix ratio, different mix ratios of dredger-fill sand-fly ash composite soils were prepared, and the mechanical properties of different mix ratio composite soils were measured by triaxial tests, and finally compared comprehensively The best mix ratio is 1:9;

[0049] The dredged fill sand used in the test has a natural moisture content of 0.6% after being air-dried, and has passed the standard compaction test

[0050] The measured maximum dry density is 1.74 g / cm 3 According to the sieving method, the particle siz...

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Abstract

Disclosed are composite soil for improving the strength of blow-filling sand subgrade soil through fly ash, and a test method thereof. Raw materials used in existing inventions are relatively complex,the construction cost is high, and due to different subgrade soil properties of different areas, the raw materials are not suitable for subgrade construction of individual areas. As for traditional construction, the subgrade soil is mixed with a certain amount of the fly ash according to the experience, qualitative analysis is not conducted, the composite soil is not tested in mechanical properties either, and consequently, the mechanical properties of a blow-filling sand and fly ash composite soil subgrade are less understood. The composite soil comprises the compositions of the fly ash andblow-filling sand, and the ratio of the fly ash to the blow-filling sand is (1-5):(5-9). The composite soil for improving the strength of the blow-filling sand subgrade soil through the fly ash, and the test method thereof are used for improving the safety of the blow-filling sand and fly ash subgrade and the utilization efficiency of the fly ash.

Description

Technical field: [0001] The invention relates to a composite soil and a test method for improving the strength of dredged sand subgrade soil by using fly ash. Background technique: [0002] As the dredger-filled road construction technology is gradually applied in the northern region, it is imminent to study the construction technology of the dredger-filled technology in the northern region. At the same time, it is necessary to study the strength and deformation of the dredger-filled sand as the main material of the roadbed. is particularly important. In China, Wang Liquan used waste plastics, waste rubber, coal, coal tar, activator, polyethylene and other materials to modify asphalt, which was used in traffic road and bridge projects; The physical and mechanical properties of the soil are suitable for the construction of roadbeds such as roads and railways; Wei Haibin and others invented road composite materials and roadbed production methods, which consist of 34%-43% of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12G01N3/34
CPCE02D3/12G01N3/34G01N2203/0005G01N2203/0039G01N2203/0067
Inventor 孟上九张华瑞王淼匡越孙义强
Owner HARBIN UNIV OF SCI & TECH