Unlock instant, AI-driven research and patent intelligence for your innovation.

A cement phosphogypsum stabilized crushed stone material for road base, its preparation method and application

A technology for stabilizing crushed stones and road bases, applied in roads, roads, buildings, etc., can solve the problem of not using too much phosphogypsum, and achieve the effects of prolonging the setting time, easy repairing, and low equipment cost

Active Publication Date: 2021-10-01
RES INST OF HIGHWAY MINIST OF TRANSPORT +2
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of cement phosphogypsum stabilized crushed stone material used for road base and its preparation method and application. The cement phosphogypsum stabilized crushed stone material contains water, cement, coarse aggregate, phosphogypsum and The modifying agent includes metakaolin and calcium oxide, which on the one hand solves the problem that the amount of phosphogypsum in the process of preparing cement phosphogypsum stabilized gravel materials cannot be too large, and on the other hand, effectively Improve the strength of the cement phosphogypsum stabilized gravel base formed by laying cement phosphogypsum stabilized gravel materials, so that it can meet the requirements for cement stabilized materials in my country's road asphalt pavement design specifications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A cement phosphogypsum stabilized crushed stone material for road base, its preparation method and application
  • A cement phosphogypsum stabilized crushed stone material for road base, its preparation method and application
  • A cement phosphogypsum stabilized crushed stone material for road base, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Preparation of cement phosphogypsum stabilized gravel base:

[0060] (1) Dry the phosphogypsum, and then mix the coarse aggregate and phosphogypsum at a mass ratio of 7:3. The coarse aggregate contains 13 parts of gravel with a particle size of 4.75-9.5mm, and 34 pieces of crushed stone with a particle size of 19.5-26.5mm, 23 pieces of crushed stone with a particle size of 19.5-26.5mm;

[0061] (2) add modifying agent in the mixture of step (1), the quality of described modifying agent is 3% of mixture quality in step (1), the mass ratio of metakaolin and calcium oxide in described modifying agent is 1:1.5;

[0062] (3) cement is added in the mixture of step (2), mixes, and the quality of described cement is 7% of the mixture quality in step (1); Described cement is ordinary portland cement;

[0063] (4) Add water to the mixture in step (3), mix to obtain cement phosphogypsum stabilized crushed stone material, the quality of the water is 7% of the mixture quality in s...

Embodiment 2

[0066] In this embodiment, the amount of modifier added in Example 1 is replaced by 5% of the mass of the mixture in step (1), and other conditions are completely the same as in Example 1.

Embodiment 3

[0068] In this embodiment, the amount of modifier added in Example 1 is replaced by 1% of the mass of the mixture in step (1), and other conditions are completely the same as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a cement phosphogypsum stabilized crushed stone material for road bases and its preparation method and application. The cement phosphogypsum stabilized crushed stone material contains water, cement, coarse aggregate, phosphogypsum and a modifier. The modifier includes metakaolin and calcium oxide, which on the one hand solves the problem that the amount of phosphogypsum cannot be too large in the process of preparing cement phosphogypsum stabilized gravel materials through the addition of modifiers; on the other hand, effectively improves the cement The strength of the cement phosphogypsum-stabilized macadam base formed by paving phosphogypsum-stabilized macadam materials makes it meet the requirements of my country's road asphalt pavement design specifications for cement-stabilized materials, and it has certain economic and environmental benefits.

Description

technical field [0001] The invention relates to the field of road base materials, in particular to a cement phosphogypsum stabilized crushed stone material used for road bases, a preparation method and application thereof. Background technique [0002] Traditional road bases include graded crushed stone bases, inorganic binder stabilized material bases, etc. The graded crushed stone base is a mixture of aggregates of various sizes and sizes. When its gradation meets the requirements of the technical specifications, it is called a graded aggregate. Its strength mainly comes from the strength of the crushed stone itself and Intercalation force and internal friction angle between gravel particles. The investment of graded crushed stone base is not high, and it can be improved in stages with the increase of traffic volume, but its flatness is poor, it is easy to raise dust, and the mud-bound gravel road surface is easy to be muddy in rainy days. Commonly used inorganic binder ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04E01C3/00
CPCC04B28/04C04B2111/0075C04B2201/50E01C3/00C04B14/02C04B14/106C04B22/144C04B22/064
Inventor 路凯冀周应新赵之杰陈武钱正富曹朋辉曾维成吴尚峰陈雷
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT