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Cement stabilized macadam mixture processing method

A technology of cement-stabilized crushed stone and processing method, which is applied in clay processing equipment, cement mixing devices, chemical instruments and methods, etc., can solve the problem of uneven mixing of mixtures and affect the durability and crack resistance performance and life of cement-stabilized crushed stone base. and other problems, to achieve the effect of uniform mixture, saving cement material and easy mixing

Active Publication Date: 2018-10-16
SHANDONG TRANSPORTATION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the defects of uneven mixing of the mixture and serious segregation phenomenon, which affects the durability and anti-crack performance and life of the cement-stabilized gravel base.

Method used

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  • Cement stabilized macadam mixture processing method
  • Cement stabilized macadam mixture processing method
  • Cement stabilized macadam mixture processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] When designing the mixing ratio of cement-stabilized crushed stone, the method of the invention is used to process the cement-stabilized crushed-stone mixture.

[0032] Raw materials: cement is ordinary Portland cement (P O); coarse aggregate is limestone with a particle size range of 20-30mm, 10-20mm, and 5-10mm; fine aggregate is limestone with a particle size of 0.1-5mm; water is tap water; The material design strength R is 5MPa.

[0033] Mixing ratio design: According to the screening results, the mixed stones are assembled by trial algorithm. After calculation, the gradation of the mixed stones meets the design requirements, and the addition ratio of each grade of aggregate is determined, as shown in the following table:

[0034] Table 1 Design results of aggregate ratio

[0035] Coarse and fine aggregate (mm)

Limestone 20-30

Limestone 10-20

Limestone 5-10

Limestone 0.1-5

percentage(%)

15

28

25

32

[0036] Table 2 ...

Embodiment 2

[0104] The method of the invention is adopted to prepare the cement-stabilized crushed stone mixture with the determined mixing ratio, water content and cement consumption, and the strength test is carried out. Test the unconfined compressive strength of the specimen by static pressure forming. The target mix ratio of cement stabilized crushed stone mixture is as follows:

[0105] Table 17 Aggregate ratio design results

[0106] Coarse and fine aggregate (mm)

Limestone 20-30

Limestone 10-20

Limestone 5-10

Limestone 0-5

percentage(%)

15

28

25

32

[0107] Table 18 Synthetic Grading Table

[0108] Sieve hole

31.5

26.5

19

16

13.2

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Passing rate

100.0

98.7

82.2

76.1

63

50

30.3

21.0

12.8

10

5.6

4.8

3.8

[0109] Table 19 Design cement dosage, water content and volume index

[0110] cement t...

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Abstract

The invention discloses a cement stabilized macadam mixture processing method and belongs to the field of road engineering. The cement stabilized macadam mixture processing method comprises the stepsof 1, determining the maximum dry density, the optimum water content, the cement consumption and the use quantity of coarse aggregates and fine aggregates through design of the mix proportion of cement stabilized macadam; 2, preparing cement slurry according to the designed optimum water content and the designed cement consumption; 3, stirring and mixing the cement slurry and the coarse aggregates; and 4, adding the fine aggregates to the mixed slurry obtained in the step 3 to be mixed evenly and then obtaining the cement stabilized macadam mixture. The cement stabilized macadam prepared through the method has the characteristics of being high in strength and crack resistance, durable, economical and friendly to environment and has great application and popularization value.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a method for processing a cement-stabilized gravel mixture. Background technique [0002] Semi-rigid base asphalt pavement is the main pavement structure form of high-grade highways in my country, and almost all of the semi-rigid base is cement-stabilized macadam materials. The durability and cracks of the cement-stabilized macadam base are worldwide problems in the field of highway construction and road maintenance. Cracks will shorten the service life of the road and endanger traffic safety. [0003] At present, the research on cement stabilized macadam at home and abroad mainly focuses on the grading and performance of the mixture and the molding method of cement stabilized macadam. The huge potential of the structure and mechanical properties of the cement-stabilized gravel itself cannot be brought into play, and the cement cannot be fully hydrated, resulting in waste of mate...

Claims

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Application Information

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IPC IPC(8): B28C1/18B28C1/20B28C5/08
CPCB28C1/18B28C1/20B28C5/08
Inventor 闫翔鹏韦金城申全军孙强余四新韩文扬韩烨
Owner SHANDONG TRANSPORTATION INST
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