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Cement-based material functionally gradient brick and preparation method thereof

A cement-based material and functional gradient technology, which is applied in the pavement paved with prefabricated blocks, sustainable waste treatment, solid waste management, etc. Even problems such as large settlement can be achieved to reduce water infiltration into the roadbed, avoid road surface diseases, and reduce uneven settlement

Active Publication Date: 2017-04-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing functionally graded bricks, such as large uneven settlement of the road surface, large penetration of water on the road surface into the roadbed, and poor resistance to fracture and surface freeze-thaw damage, the present invention provides a road surface that can reduce uneven settlement of the road surface and maintain the road surface. A functionally graded brick with good performance in reducing pavement water penetration to the subgrade, fracture resistance, and surface freeze-thaw damage resistance while stretching and stretching, and a preparation method thereof, are suitable for industrial production, thereby reducing road surface diseases

Method used

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  • Cement-based material functionally gradient brick and preparation method thereof
  • Cement-based material functionally gradient brick and preparation method thereof
  • Cement-based material functionally gradient brick and preparation method thereof

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preparation example Construction

[0042] A preparation method of a cement-based material functionally graded brick, the steps of which are:

[0043] 1) Select the decorative pattern of the surface layer template of the functional gradient brick, prepare the special-shaped mold, and apply the release agent;

[0044] 2) The fiber mortar is pressed into the lower layer of the mold, vibrated and formed, and the cementitious material, fine aggregate, water, water reducing agent and fiber of the formed fiber mortar layer, among which the cementitious material, fine aggregate, water and water reducing agent By weight: 100 parts of cementitious material, 10 to 65 parts of fine aggregate, 20 to 50 parts of water, 0.8 to 1.5 parts of water reducer, and the amount of fiber is 1% of the total volume of the prepared cement-based material toughening layer ~2.5%, the cementitious material includes 15~50 parts of cement, 40~85 parts of fly ash, 0~5 parts of silica fume, 0~10 parts of granulated blast furnace slag powder, and ...

Embodiment 1

[0048] In this embodiment, the fiber mortar layer (fiber cement-based material toughening layer) includes cementitious material, fine aggregate, water, water reducing agent and fiber, wherein cementitious material, fine aggregate, water and water reducing agent are by weight Calculated as: cementitious material, the dosage is 100 parts, the fine aggregate is artificial sand, the dosage is 10 parts, the maximum particle size is 0.5mm, the water dosage is 20 parts, and the dosage of polycarboxylate superplasticizer is gelling 1.2% of the weight of the material, the fiber adopts polyvinyl alcohol fiber, and the dosage is 1% of the total volume of the toughened layer of the prepared cement-based material; the cementitious material is selected from P.O 425 ordinary Portland cement and fly ash, wherein, 15 parts of cement, 85 parts of fly ash;

[0049] The polyvinyl alcohol fiber used has a length of 12 mm, a diameter of 0.039 mm, a tensile strength of 1620 MPa, an elastic modulus o...

Embodiment 2

[0053] In this embodiment, the fiber mortar layer (fiber cement-based material toughening layer) includes cementitious material, fine aggregate, water, water reducing agent and fiber, wherein cementitious material, fine aggregate, water and water reducing agent are by weight Calculated as: cementitious material, the dosage is 100 parts, the fine aggregate is artificial sand, the dosage is 30 parts, the maximum particle size is 0.5mm, the water dosage is 40 parts, and the dosage of polycarboxylate superplasticizer is gelling 1.5 parts by weight of the material, the fiber adopts polyvinyl alcohol fiber, and the dosage is 1% of the total volume of the toughening layer of the prepared cement-based material; the cementitious material is selected from P.O 425 ordinary Portland cement and fly ash, wherein, 40 parts of cement, 50 parts of fly ash, 3 parts of silica fume, 7 parts of granulated blast furnace slag powder;

[0054] The polyvinyl alcohol fiber used has a length of 12 mm, a...

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Abstract

The invention relates to a cement-based material functionally gradient brick. The functionally gradient brick has an upper functionally gradient layer and a lower functionally gradient layer, i.e. a cement-based material toughening layer and a cement concrete base layer respectively. The fiber cement based material toughening layer is a fiber mortar layer, the cement concrete base layer is a fine aggregate concrete layer, and the vertical direction of the functionally gradient brick is a Z shaped section; the materials of the fiber mortar layer include a cementitious material, fine aggregate, water, a water reducing agent and fiber; the raw materials of the fine aggregate concrete layer include a cementitious material, coarse aggregate, fine aggregate and water. The invention also provides a preparation method of the cement-based material functionally gradient brick. The invention provides the functionally gradient brick and a preparation method thereof, and the functionally gradient brick can alleviate uneven pavement settlement, maintain the pavement shrinkability, at the same time reduces permeation of pavement water to roadbed, and has good breaking resistance and surface freeze-thawing damage resistance, and is suitable for industrial production, thereby reducing pavement diseases.

Description

technical field [0001] The invention belongs to the technical field of building engineering materials, and relates to a cement-based functional gradient brick and a preparation method thereof. Background technique [0002] In the past ten years, with the continuous acceleration of my country's urban modernization process and the continuous improvement of environmental beautification requirements, the ground of sidewalks and squares is mostly paved with cement concrete square bricks or stone floor tiles. Based on the current construction technology and quality management status, as well as the technological requirements for reserved expansion joints between the floor tiles and the characteristics of the general roadbed construction process, uneven settlement and water accumulation at the base of the pedestrian pavement, loosening and warping of the pavement tiles , Subsidence, fracture, surface freeze-thaw damage and other common diseases affect the beauty of the road and the...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04C04B18/08C04B18/22C04B18/16C04B18/14E01C5/06
CPCC04B18/08C04B18/142C04B18/146C04B18/167C04B18/22C04B28/00C04B28/04C04B2111/00612C04B2111/0075E01C5/065C04B14/06C04B2103/302C04B16/0641Y02W30/91
Inventor 付传清陈琎炜郭健贺才逸朱凯琪范铖雅
Owner ZHEJIANG UNIV OF TECH
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