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Composite material for preparing crack-free cement stabilized macadam and preparation method of composite material

A cement-stabilized crushed stone and composite material technology, which is applied in the field of road construction materials, can solve the problems of economy, construction simplicity, and insufficient cracks, so as to increase unconfined compressive strength, improve mechanical properties, and reduce elastic modulus. volume effect

Inactive Publication Date: 2019-07-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above measures have played a certain role in the prevention and control of cracks in the cement-stabilized macadam base, but there are still deficiencies in terms of economy, ease of construction, and crack cure.

Method used

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  • Composite material for preparing crack-free cement stabilized macadam and preparation method of composite material

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Experimental program
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Effect test

Embodiment 1

[0021] A composite material for preparing non-crack cement stabilized gravel, the composite material is composed of anti-crack mineral powder and anti-crack fiber. More specifically, the anti-cracking ore powder meets the following conditions: 0.6mm square hole sieve residue is 0, 0.075mm square hole sieve residue is ≥65%, moisture content is 9-13.5%, and SiO in the anti-cracking ore powder 2 、Al 2 o 3 , MgO and Fe 2 o 3 The total content is ≥70%; the anti-cracking fiber is a synthetic fiber made from propylene polymerization, the fiber monofilament diameter is 10-25μm, the fiber monofilament length is 9-20mm, the fiber tensile strength is ≥350MPa, and the fiber elongation at break rate≥15%, elastic modulus≥3900MPa, and the mass ratio of anti-crack mineral powder and anti-crack fiber is 100:8.

[0022] The preparation process of the composite material is as follows: Add 4 parts of anti-crack mineral powder into the mixer, add 0.32 parts of anti-crack fiber while stirring, ...

Embodiment 2

[0024] A composite material for preparing non-crack cement stabilized gravel, the composite material is composed of anti-crack mineral powder and anti-crack fiber. More specifically, the anti-cracking ore powder meets the following conditions: 0.6mm square hole sieve residue is 0, 0.075mm square hole sieve residue is ≥65%, moisture content is 9-13.5%, and SiO in the anti-cracking ore powder 2 、Al 2 o 3 , MgO and Fe 2 o 3 The total content is ≥70%; the anti-cracking fiber is a synthetic fiber made from propylene polymerization, the fiber monofilament diameter is 10-25μm, the fiber monofilament length is 9-20mm, the fiber tensile strength is ≥350MPa, and the fiber elongation at break rate≥15%, elastic modulus≥3900MPa, and the mass ratio of anti-crack mineral powder and anti-crack fiber is 100:10.

[0025] The preparation process of the composite material is as follows: Add 4 parts of anti-crack mineral powder into the mixer, add 0.40 parts of anti-crack fiber while stirring,...

Embodiment 3

[0027] A composite material for preparing non-crack cement stabilized gravel, the composite material is composed of anti-crack mineral powder and anti-crack fiber. More specifically, the anti-cracking ore powder meets the following conditions: 0.6mm square hole sieve residue is 0, 0.075mm square hole sieve residue is ≥65%, moisture content is 9-13.5%, and SiO in the anti-cracking ore powder 2 、Al 2 o 3 , MgO and Fe 2 o 3 The total content is ≥70%; the anti-cracking fiber is a synthetic fiber made from propylene polymerization, the fiber monofilament diameter is 10-25μm, the fiber monofilament length is 9-20mm, the fiber tensile strength is ≥350MPa, and the fiber elongation at break rate≥15%, elastic modulus≥3900MPa, and the mass ratio of anti-crack mineral powder and anti-crack fiber is 100:12.

[0028] The preparation process of the composite material is as follows: Add 4 parts of anti-crack mineral powder into the mixer, add 0.48 parts of anti-crack fiber while stirring,...

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Abstract

The invention discloses a composite material for preparing crack-free cement stabilized macadam and a preparation method of the composite material, and belongs to the technical field of road buildingmaterials. The composite material comprises micro-expansion moisture-preserving anti-cracking mineral powder and anti-cracking fibers, and the weight ratio of the micro-expansion moisture-preserving anti-cracking mineral powder to the anti-cracking fibers is 100:(8-20). The preparation method comprises the following steps: 1) adding micro-expansion moisturizing anti-cracking mineral powder into astirrer; 2) adding anti-cracking fibers while stirring; and 3) conducting full stirring, bagging and packaging. Compared with an existing semi-rigid base layer, the invention effectively solves the problem of cracking of a semi-rigid base layer. The preparation method is simple, quality control is convenient, the anti-cracking capacity of the semi-rigid base layer can be effectively improved, cracks are avoided, and therefore the purposes of improving the durability of the semi-rigid base layer and an asphalt pavement and prolonging the service life of the pavement are achieved.

Description

technical field [0001] The invention relates to the technical field of road building materials, in particular to a composite material used to prepare crack-free cement-stabilized gravel and a preparation method thereof. Background technique [0002] Cement-stabilized crushed stone is made of crushed stone with a certain gradation as aggregate, combined with cementitious material and a certain amount of mortar volume to fill the gaps, and after mixing, compacting and curing, it is formed with certain mechanical strength and compactness. Mixture. Cement-stabilized macadam base has the advantages of good strength, integrity and significant economic benefits, and occupies an important position in the current construction of high-grade highways. However, as the cement-stabilized macadam base material is prone to dry shrinkage cracks and temperature shrinkage cracks when the humidity and temperature change, as the traffic load increases, it is easy to generate load cracks, result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B16/06
CPCC04B40/0039C04B16/0633C04B14/02
Inventor 陈小兵王俊天
Owner SOUTHEAST UNIV
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