Cement-stabilized macadam base and construction method thereof

A cement-stabilized gravel and construction method technology, applied in the direction of buildings, roads, roads, etc., can solve the problems of reducing the stiffness of the base layer, achieve the effects of improving fatigue resistance, improving shrinkage compensation ability, and avoiding cracking

Active Publication Date: 2019-07-26
河北交规院瑞志交通技术咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cement can enhance the strength and stability of the water-stabilized base, and limiting the cement content to 5% will relatively reduce the stiffness of the base

Method used

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  • Cement-stabilized macadam base and construction method thereof
  • Cement-stabilized macadam base and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A cement-stabilized gravel base, which is constructed through the following steps:

[0036] (1) Mix 78kg coarse aggregate, 5kg fine aggregate, 4kg high belite cement, 0.2kg calcium sulfoaluminate-calcium oxide composite expansion agent and 5kg water to obtain the mixture; The crushing value is 26%, the needle flake content is 15%, the dust content below 0.075mm is 1.2%, and the soft stone content is 3%. The gradation range of the mixture formed by mixing coarse aggregate and fine aggregate is: through 31.5 100wt% through 26.5mm square hole sieve, 96.8wt% through 26.5mm square hole sieve, 79.0wt% through 19.0mm square hole sieve, 64.6wt% through 16.0mm square hole sieve, 52.9wt% through 9.5mm square hole sieve %, 32.3wt% through 4.75mm square hole sieve, 21.3wt% through 2.36mm square hole sieve, 15.2wt% through 1.18mm square hole sieve, 9.4wt% through 0.6mm square hole sieve, 9.4wt% through 0.3mm square hole sieve Hole sieve is 6.8wt%, through 0.15mm square hole sieve i...

Embodiment 2

[0040] The difference between the construction operation of embodiment 2 and embodiment 1 is: in step (2), two pavers are separated by 8m front and rear, and pave forward at the same time, with a lateral overlap of 200mm, and the rest are consistent with embodiment 1.

Embodiment 3

[0042] The construction operation steps of embodiment 3 are the same as that of embodiment 1, the difference is that each raw material is added according to the proportion in table 1, and the crushing value of limestone crushed stone is 25%, the needle flake content is 15%, and the dust below 0.075mm content of 1.0%, and soft stone content of 2.8%; the gradation range of the mixture formed by mixing coarse aggregate and fine aggregate is: 100wt% through a 31.5mm square hole sieve, 95wt% through a 26.5mm square hole sieve, 85wt% by 19.0mm square hole sieve, 77wt% by 16.0mm square hole sieve, 58wt% by 9.5mm square hole sieve, 28wt% by 4.75mm square hole sieve, 20wt% by 2.36mm square hole sieve, 11wt% by 1.18mm square hole sieve, 8wt% by 0.6mm square hole sieve, 5wt% by 0.3mm square hole sieve, 3wt% by 0.15mm square hole sieve, 3wt% by 0.075mm square hole sieve; All the other are consistent with embodiment 1.

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Abstract

The invention relates to the technical field of highway pavement laying, in particular to a cement-stabilized macadam base. The cement-stabilized macadam base is prepared from the following compositions in parts by weight: 78-87 parts of coarse aggregates, 5-13 parts of fine aggregates, 4-9 parts of high belite cement, 0.2-0.8 part of a calcium sulphoaluminate-calcium oxide compound expansion agent and 5-15 parts of water, a waterproof reinforcing agent is sprayed on the surface layer of the cement-stabilized macadam base, and the waterproof reinforcing agent is prepared from the following rawmaterials in percentage by weight: 1-3% of a fatty acid water-proofing agent, 50-70% of a styrene-acrylic emulsion, 15-30% of asbestos powder and 10-25% of water; and the invention further relates toa construction method of the cement-stabilized macadam base. According to the base obtained through construction, compared with the prior art, the mechanical strength is improved, the average temperature shrinkage coefficient and the average dry shrinkage coefficient are both decreased, and the comprehensive performance is improved.

Description

technical field [0001] The invention relates to the technical field of expressway pavement paving, in particular to a cement-stabilized gravel base and a construction method thereof. Background technique [0002] Cement-stabilized crushed stone uses graded crushed stone as aggregate, uses a certain amount of cementitious material and sufficient mortar volume to fill the gaps in the aggregate, and paves and compacts according to the principle of embedded extrusion. Its compaction is close to compactness, and its strength mainly depends on the principle of interlocking and locking between crushed stones, and at the same time, there is enough mortar volume to fill the voids of aggregates. Its initial strength is high, and its strength increases with age to quickly form a board, so it has higher strength, better impermeability and frost resistance. Cement-stabilized crushed stone is not muddy when it rains, and has a solid surface. It is an ideal base material for high-grade pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04E01C3/06C04B28/04C04B41/85
CPCC04B28/04C04B41/50C04B41/85E01C3/04E01C3/06C04B14/28C04B14/06C04B22/064C04B22/143C04B41/46C04B41/4857
Inventor 张悦孙浩洋陈燕刘雄伟梁亮单继雄吕军军崔伟谷建玲
Owner 河北交规院瑞志交通技术咨询有限公司
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