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Road as well as water-stable layer and preparation process thereof

A water-stabilizing layer and road technology, applied in the directions of roads, roads, chemical instruments and methods, can solve the problems of poor road structure strength, high cost, easy cracking, etc., and achieve the effect of ensuring strength, good effect, and preventing cracking.

Pending Publication Date: 2021-11-30
深圳市颐泰中和科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problem that traditional road-building cementitious materials such as lime and cement are usually used in the paving of existing roads, the structural strength of the resulting road is relatively poor, the cost is high, and the problem of easy cracking is provided by the present invention. Preparation Process

Method used

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  • Road as well as water-stable layer and preparation process thereof
  • Road as well as water-stable layer and preparation process thereof
  • Road as well as water-stable layer and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A water-stabilized layer for roads in this embodiment, the water-stabilized layer is a solidified soil structure layer formed by solidifying a water-stabilized mixture, and the water-stabilized mixture contains modified phosphogypsum, active components, pine Soil and water, wherein the modified phosphogypsum is obtained by calcining phosphogypsum and a modifier at a high temperature of 830°C for 2 hours, and the modifier includes the following components in weight percentage: CaO88%, SiO 2 9%, Al 2 o 3 3%. The mass ratio of the phosphogypsum to the modifier is 1:1, and the active component is water-quenched slag fine powder, and its mass accounts for 50% of the total weight of the modified phosphogypsum and the active component. The particle diameter of the loosened soil is 10-15mm, and the quality of the loosened soil is 10 times of the total weight of the modified phosphogypsum and the active components. The particle size composition of the phosphogypsum is: 2 / g...

Embodiment 2

[0063] A water stabilizing layer for roads in this embodiment, the water stabilizing layer is basically the same as in Example 1, the main difference is that in this embodiment the modified calcination temperature is 810°C, the calcination time is 2.5h, and the composition of the modifier is: CaO 94%, SiO 2 4%, Al 2 o 3 2%, the mass ratio of phosphogypsum to modifier is 1:1.3, and the active component is water quenching slag, whose mass accounts for 45% of the total weight of the modified phosphogypsum and the active component. The particle diameter of the loosened soil is 10-15mm, and the quality of the loosened soil is 8 times of the total weight of the modified phosphogypsum and the active components. The specific surface area of ​​the phosphogypsum is 3400cm 2 / g, the specific surface area of ​​the modifier is 3300cm 2 / g, the specific surface area of ​​water-quenched slag is 3000cm 2 / g.

[0064] The preparation method of the road water stabilizing layer of the pre...

Embodiment 3

[0066] A water stabilizing layer for roads in this embodiment, the water stabilizing layer is basically the same as in Example 1, the main difference is that in this embodiment the modified calcination temperature is 880°C, the calcination time is 1h, and the composition of the modifier is: CaO 90%, SiO 2 8.5%, Al 2 o 3 1.5%, the mass ratio of phosphogypsum and modifier is 1:1.5, the active component is a mixture of water-quenched slag and fly ash, and its mass accounts for 55% of the total weight of modified phosphogypsum and active components, The quality of fly ash accounts for 5% of the total weight of modified phosphogypsum and active components. The particle size of the loosened soil is 10-15mm, and the quality of the loosened soil is 9 times of the total weight of the modified phosphogypsum and the active components. The specific surface area of ​​the phosphogypsum is 3600cm 2 / g, the specific surface area of ​​the modifier is 3250cm 2 / g, the specific surface are...

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Abstract

The invention discloses a road as well as a water-stable layer and a preparation process thereof, and belongs to the technical field of phosphogypsum solid waste recycling. The road water-stable layer is a solidified soil structure layer formed by solidifying and forming a water-stable mixture, the water-stable mixture comprises modified phosphogypsum, an active component, loosened soil and water, the modified phosphogypsum is formed by calcining phosphogypsum and a modifier at high temperature, and the modifier comprises the following components in percentage by weight: 88-94% of CaO, 4-9% of SiO2 and 1.5-3% of Al2O3. The phosphogypsum-based cementing material is used for a temporary road and a water stable layer of the road, so that the phosphogypsum-based cementing material can replace a large amount of lime, cement, fly ash and other traditional road building materials, the strength, especially the early strength, of the lime-ash soil base layer is effectively improved, the structural integrity is enhanced, the shrinkage of the base layer material is reduced, and the crack resistance is improved.

Description

technical field [0001] The invention belongs to the technical field of regeneration and utilization of phosphogypsum solid waste, and more specifically relates to a road, its water-stabilized layer and a preparation process. Background technique [0002] With the rapid development of economy and society, my country's road infrastructure construction has entered a new period of development. For the field of road construction, all kinds of stone materials are the main raw materials for the construction of high-grade road pavement bases. The mileage of roads expanded by the country increases year by year. With the start of these large-scale projects, the shortage of materials has become increasingly prominent, among which the shortage of high-quality stone materials is the most serious. protrude. On the one hand, a large amount of stone mining will cause damage to the ecological environment in mountainous areas, and on the other hand, the long-distance transportation of raw ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B11/26C04B18/04C04B20/04C09K17/10E01C3/00E01C7/32
CPCC04B28/143C04B11/26C04B20/04C04B18/0445C09K17/10E01C7/32E01C7/325E01C3/00C04B2111/0075C04B2201/50C09K2103/00C04B2111/00017C04B7/17C04B14/361C04B7/243C04B20/023Y02W30/91
Inventor 周家成施雄黄建章李永春
Owner 深圳市颐泰中和科技有限公司
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