Phosphogypsum cement graded broken stone stable layer and preparation method thereof

A technology for grading crushed stone and phosphogypsum is applied in the field of phosphogypsum cement graded crushed stone stable layer, which can solve the problems of slag pollution and phosphogypsum accumulation, and achieve the effect of solving the accumulation and improving the promotion value.

Inactive Publication Date: 2018-09-11
HUBEI CHANG YAOXIN MATERIALS LIMITED BY SHARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The invention provides a phosphogypsum cement graded crushed stone stable layer, which is a graded crushed stone stable layer with phosphogypsum as the main stable material, which solve...

Method used

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  • Phosphogypsum cement graded broken stone stable layer and preparation method thereof
  • Phosphogypsum cement graded broken stone stable layer and preparation method thereof
  • Phosphogypsum cement graded broken stone stable layer and preparation method thereof

Examples

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Embodiment 1

[0036] This embodiment proposes a phosphogypsum cement graded crushed stone stabilization layer, including aggregates and phosphogypsum comprehensive stabilization materials, wherein the aggregates include coarse aggregates and fine aggregates,

[0037] Coarse aggregates include crushed stones of three particle sizes, including 15 parts of crushed stones with a particle size of 4.75-9.5 mm, 25 parts of crushed stones with a particle size of 9.5-19 mm, and 30 parts of crushed stones with a particle size of 19-26.5 mm.

[0038] Fine aggregate, including 30 parts of stone chips with a particle size of 0-4.75mm;

[0039] The addition amount of phosphogypsum comprehensive stabilizing material is 15% of the aggregate; the water content of the graded gravel stabilizing layer is 7.0%.

[0040] Preferably, the phosphogypsum comprehensive stabilization material includes 15 parts of phosphogypsum, 10 parts of cement, and 10 parts of mineral powder.

[0041] This embodiment also provides...

Embodiment 2

[0052] This embodiment proposes a phosphogypsum cement graded crushed stone stabilization layer, including aggregates and phosphogypsum comprehensive stabilization materials, wherein the aggregates include coarse aggregates and fine aggregates,

[0053] Coarse aggregates include crushed stones of three particle sizes, including 20 parts of crushed stones with a particle size of 4.75-9.5mm, 20 parts of crushed stones with a particle size of 9.5-19mm, and 25 parts of crushed stones with a particle size of 19-26.5mm.

[0054] Fine aggregate, including 35 parts of stone chips with a particle size of 0-4.75 mm;

[0055] The addition amount of phosphogypsum comprehensive stabilizing material is 18% of the aggregate; the water content of the graded gravel stabilizing layer is 7.5%.

[0056] Preferably, the phosphogypsum comprehensive stabilization material includes 18 parts of phosphogypsum, 10 parts of cement, and 10 parts of mineral powder.

[0057] This embodiment also provides a...

Embodiment 3

[0068] This embodiment proposes a phosphogypsum cement graded crushed stone stabilization layer, including aggregates and phosphogypsum comprehensive stabilization materials, wherein the aggregates include coarse aggregates and fine aggregates,

[0069] Coarse aggregates include crushed stones of three particle sizes, including 25 parts of crushed stones with a particle size of 4.75-9.5 mm, 15 parts of crushed stones with a particle size of 9.5-19 mm, and 30 parts of crushed stones with a particle size of 19-26.5 mm.

[0070] Fine aggregate, including 40 parts of stone chips with a particle size of 0-4.75mm;

[0071] The addition amount of phosphogypsum comprehensive stabilizing material is 20% of the aggregate; the water content of the graded gravel stabilizing layer is 8.1%.

[0072] Preferably, the phosphogypsum comprehensive stabilization material includes 20 parts of phosphogypsum, 10 parts of cement, and 10 parts of mineral powder.

[0073] This embodiment also provides...

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Abstract

The invention provides a phosphogypsum cement graded broken stone stable layer, which comprises aggregates and a phosphogypsum composite stable material. The aggregates comprise coarse aggregate and fine aggregate. The coarse aggregate comprises broken stones with three particle sizes: 15-25 parts of broken stones with particle size of 4.75-9.5 mm, 15-25 parts of broken stones with particle size of 9.5-19 mm and broken stones with particle size of 19-26.5 mm. the fine aggregate comprises 30-40 parts of stone chips with particle size of 0-4.75 mm. Addition amount of the phosphogypsum compositestable material is 15-20% of the amount of the aggregates. Water content of the graded broken stone stable layer is 7.0-8.1%. The invention has the following beneficial effects: a new approach of phosphogypsum utilization is provided, and the phosphogypsum accumulation problem can be effectively solved. The 7-day unconfined compressive strength of the graded broken stone stable layer is averagely8.1 Mpa. The 7-day unconfined compressive strength is raised by 7-9 Mpa, which is far higher than 5 Mpa of a cement-stabilized macadam stable layer. As slag of S95 and above is adopted for the gradedbroken stone stable layer, performance of the graded broken stone stable layer can be effectively raised and cost can be reduced, and environment pollution caused by slag will be avoided. The manufacturing method of the graded broken stone stable layer is simple, and the manufacturing can be realized without large quantities of professional equipment.

Description

technical field [0001] The invention relates to the field of novel graded crushed stone stable layers, in particular to a phosphogypsum cement graded crushed stone stable layer. Background technique [0002] Graded crushed stone is a mixture composed of aggregates of various sizes and sizes. When its gradation meets the technical specifications, it is called graded aggregate. Graded aggregates include graded crushed stone, graded crushed gravel (a mixture of crushed stone and gravel, and the oversize particles in the gravel are often crushed to form crushed gravel together with the gravel) and graded gravel (or graded grit). Coarse and fine gravel aggregates and stone chips each account for a certain proportion of the mixture. When the particle composition meets the requirements of dense gradation, it is called graded gravel. Graded crushed stones are generally composed of crushed stones pre-screened into several (such as four) different sizes, and unscreened crushed stone...

Claims

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Application Information

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IPC IPC(8): C04B28/14
Inventor 吴赤球杨新峰吕伟王玉珍
Owner HUBEI CHANG YAOXIN MATERIALS LIMITED BY SHARE
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