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Cement stabilized macadam mixture and preparation process thereof

A cement-stabilized gravel and mixture technology, which is applied in the field of roadbed materials, can solve problems such as dry shrinkage cracks, poor bending and tensile strength, and road damage, and achieve the goals of improving stability, inhibiting further expansion, and increasing bonding strength Effect

Inactive Publication Date: 2019-07-09
上海家根路基材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that the overall bending and tensile strength of cement-stabilized macadam is not good when it is used, it is easy to produce shrinkage cracks, which leads to the problem of overall damage to the road. The first purpose of the present invention is to provide a cement-stabilized macadam mixed By adding polypropylene fiber, aluminum titanate and wollastonite powder to solve the above technical problems, it has good bending and tensile strength, and is not easy to produce shrinkage cracks, which is conducive to maintaining good stability of the road as a whole

Method used

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  • Cement stabilized macadam mixture and preparation process thereof
  • Cement stabilized macadam mixture and preparation process thereof
  • Cement stabilized macadam mixture and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: A cement-stabilized gravel mixture, each component and its corresponding parts by weight are shown in Table 1, and are prepared through the following steps:

[0046] Step 1: Stir, mix and dry the new aggregate, stone chips, recycled aggregate and Portland cement in the drying barrel with the corresponding weight parts, the drying barrel speed is 800rpm, the time is 40min, and the temperature is controlled at 90 ℃ to get the mixture;

[0047] Step 2, adding polypropylene fiber and wollastonite powder in corresponding parts by weight to the mixture, stirring and drying, the temperature is controlled at 85°C, the time is 10min, and the stirring speed is 500rpm, to obtain the base material;

[0048] Step 3, put the base material and aluminum titanate in corresponding parts by weight into a mixing tank for stirring for 5 minutes at a stirring speed of 800 rpm, and leave for 20 minutes to obtain the starting material;

[0049] Step 4: Add corresponding parts by...

Embodiment 2-8

[0051] Embodiment 2-8: A cement-stabilized gravel mixture, the difference from Embodiment 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0052] Each component and parts by weight thereof in table 1 embodiment 1-8

[0053]

[0054]

Embodiment 9

[0055] Embodiment 9: A cement-stabilized gravel mixture, the difference from Example 1 is that the new aggregate is mainly composed of limestone with a particle size range of 5-15mm and 15-31.5mm in parts by weight ratio of 1 : 1.8 composition.

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Abstract

The invention discloses a cement stabilized macadam mixture and a preparation process thereof, relates to the technical field of roadbed materials, and solves the problems that a whole road is damagedas cement stabilized macadam is poor in overall bending tensile strength and easy to generate dry shrinkage cracks when in use. The cement stabilized macadam mixture comprises the following components in parts by weight: 4-5 parts of Portland cement; 30-45 parts of new aggregate; 20-25 parts of recycled aggregate; 28-36 parts of stone chips; 4-8 parts of polypropylene fiber; 10-12 parts of wollastonite powder; 0.3-0.5 part of aluminotitanate; 5-10 parts of an expanding agent; and 4-8 parts of water. The cement stabilized macadam provided by the invention has good bending tensile strength, does not easily generate dry shrinkage cracks, and has relatively high quality as a whole, so that a road keeps good stability as a whole and is not easy to damage.

Description

technical field [0001] The invention relates to the technical field of roadbed materials, in particular to a cement-stabilized gravel mixture and a preparation process thereof. Background technique [0002] Cement-stabilized crushed stone refers to a certain grade of crushed stone mixed with a sufficient amount of cement and water, and the mixture obtained after mixing is obtained after compaction and curing. [0003] A Chinese invention patent with the publication number CN106830816A discloses a cement-stabilized crushed stone for permeable concrete. The raw materials for its preparation include dry materials and water. The dry materials include the following components in parts by weight: cement 140 ~160 parts by weight; stone chips 180~200 parts by weight; coarse aggregate 1400~1600 parts by weight. After measuring each component in the dry material according to the weight percentage, put it into the mixer and mix it evenly, then add water and mix it evenly; then extrude...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/28C04B18/16C04B18/12C04B16/0633C04B14/043C04B24/40C04B22/064
Inventor 刘绘邵坤管永强
Owner 上海家根路基材料有限公司