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Preparation method of expansive soil roadbed filler simply modified by titanium gypsum

A technology of titanium gypsum and soil roadbed, applied in the field of geotechnical engineering, can solve problems such as environmental pollution, high cost, and poor effect, and achieve the effects of low cost, reduced emissions, and improved compressive strength and shear strength

Pending Publication Date: 2022-01-04
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: the method of improving expansive soil roadbed in the prior art has poor effect, high cost and environmental pollution, etc.

Method used

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  • Preparation method of expansive soil roadbed filler simply modified by titanium gypsum
  • Preparation method of expansive soil roadbed filler simply modified by titanium gypsum
  • Preparation method of expansive soil roadbed filler simply modified by titanium gypsum

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] figure 1 Be the flow chart of the present invention, by figure 1 Visible, the preparation method of a kind of titanium gypsum simple modification improved expansive soil roadbed filler of the present invention comprises the following steps:

[0035] Step 1, calcining titanium gypsum at a temperature of 120°C-180°C for 2 hours to 3 hours to convert the dihydrate gypsum in the titanium gypsum into hemihydrate gypsum, then crushing and passing through a 0.5mm sieve to obtain titanium gypsum powder, the titanium gypsum The gypsum powder is aged for 36-60 hours before use.

[0036] In this embodiment, the calcination temperature is 120° C., and the aging time is 48 hours.

[0037] Step 2, put the expansive soil in an oven to dry for 24 hours, the temperature of the oven is 95°C-115°C, and then crush it through a 2mm sieve for later use. ...

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Abstract

The invention provides a preparation method of an expansive soil roadbed filler simply modified by waste titanium gypsum, and relates to the technical field of geotechnical engineering. According to the method, titanium gypsum powder subjected to simple physical modification is used as a curing agent to improve the expansive soil roadbed; the titanium gypsum is doped into the expansive soil, the water content is controlled to be 18%-20%, the mixture is fully stirred to be uniform, and the mass of the dry titanium gypsum accounts for 20%-25% of the mass of the dry expansive soil. The cost of the curing agent can be reduced, resource utilization of solid waste titanium gypsum can be achieved, and good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a preparation method for simply modifying titanium gypsum and improving expansive soil roadbed filler. Background technique [0002] As an important part of the entire transportation system, roadbed quality directly affects driving speed and driving safety. Due to the widespread distribution of bad subgrade filler expansive soil, it has brought considerable harm to subgrade construction. Therefore, the filler of natural expansive soil embankment site does not meet the basic requirements of high-grade road and railway embankment filling. [0003] At present, the research on improving expansive soil as expressway subgrade filler is still immature, and there is a lack of economical and efficient special curing agent and detailed and standardized treatment methods. For expansive soil subgrade engineering, the initial treatment method is to replace the filling soil....

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B11/26
CPCC04B28/142C04B11/266C04B2111/0075C04B2201/50C04B14/104
Inventor 查甫生吴杰康博乔勃睿孙献国
Owner HEFEI UNIV OF TECH
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