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Construction method of ardealite improved roadbed

A construction method and phosphogypsum technology, applied in the directions of roads, roads, buildings, etc., can solve the problems of differential settlement, disordered subgrade filling, and poor compaction, and achieve the effect of improving service life, simple construction method and reducing occupation.

Active Publication Date: 2017-01-18
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for improving roadbeds with phosphogypsum, which is used to solve the problem of differential settlement caused by disordered fillers and lax compaction of traditional roadbeds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] Embodiment: the construction method of phosphogypsum improved roadbed, comprises the following steps:

[0020] (1) Treatment of phosphogypsum mixture: In terms of mass percentage, weigh 80 tons of phosphogypsum and put it into a silo of the cement-stabilized soil mixing station, weigh 20 tons of crushed stone, and put it into another silo of the mixing station. In the silo, the materials in the two silos are added to the forced mixer, mixed and stirred evenly to obtain 100 tons of mixed material;

[0021] (2) Solidification treatment of phosphogypsum mixture: In terms of mass percentage, cement is blended at a ratio of 6%, and fly ash is blended at a ratio of 10%. Weigh 6 tons of ordinary Portland cement and 10 tons of fly ash, add In the forced mixer, mix and stir evenly, obtain 116 tons of cured material;

[0022] (3) Mixing ratio of phosphogypsum solidified material with water: take the solidified material, adopt the vibration molding method, mix the solidified mate...

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PUM

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Abstract

A construction method of an ardealite improved roadbed is characterized by comprising the five steps of ardealite mixture treatment, mixture curing treatment, solidifying material water-adding preparation in proportion, solidifying material improvement anti-cracking treatment and site spreading and testing. The requirements for road base strength and rebound modulus can be met, the construction method can be widely applied in the region lack of filled earth and the region having higher solid ardealite waste yield, the occupation on cultivated land of ardealite can be decreased, the environmental damage caused by the ardealite is reduced, and the waster is changed into wealth. In addition, the ardealite is subjected to solidifying and improving treatment, differential settlement of the roadbed can be reduced, the problem of differential settlement caused by the fact that a traditional roadbed adopts disordered fillers and is not well compacted is solved, and the service life of the roadbed is prolonged.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a roadbed design and a construction method thereof. Background technique [0002] Traditional road subgrades are mainly divided into rock-filled subgrades, soil-filled subgrades and soil-rock mixed subgrades, among which soil-rock subgrades are the most common. Soil-rock mixed subgrade needs to be filled with earth and rock from the borrow pit. Due to the complex geological conditions in the road construction area, the physical and mechanical properties of fillers in different sections are quite different. If the same paving layer of the subgrade is paved with various The soil-rock mixture is not easy to be compacted and leveled, and it is very easy to cause differential settlement after construction, causing damage and deformation of the road surface. [0003] Phosphogypsum is a by-product produced by the wet process of phosphoric acid produced by the reaction of phospholime and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04
CPCE01C3/00E01C3/003E01C3/04
Inventor 李志清周应新樊思林钱坤张仕华张晓锋陈武杨俊宏苗晟源吴继忠曾丽李丹丹胡德军孔令伟方绍林李文吴尚峰曾维成
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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