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Super-early-strength black steel fiber reinforced concrete castable and using method thereof

A technology of steel fiber concrete and castables, which is applied in the field of ultra-early strength black steel fiber concrete castables, can solve the problems that cannot be satisfied at the same time, and achieve the effects of convenient construction, good durability and good road performance

Inactive Publication Date: 2020-04-03
WUHAN HANYANG MUNICIPAL CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the conventional concrete repair materials can meet these requirements at the same time

Method used

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  • Super-early-strength black steel fiber reinforced concrete castable and using method thereof
  • Super-early-strength black steel fiber reinforced concrete castable and using method thereof
  • Super-early-strength black steel fiber reinforced concrete castable and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A super-early-strength black steel fiber concrete castable, the ratio of each raw material content in the super-early-strength black steel fiber concrete castable per cubic meter is as follows:

[0029]

[0030] The super-early-strength dry-mixed mortar contains 30% by mass of 42.5-grade ordinary Portland cement, 13% by mass of 42.5-grade sulphoaluminate cement, 43% by mass of quartz sand, and 4% by mass of fly ash per 100% by mass of components , 5% by mass of silica fume and 5% by mass of powdered water reducer.

[0031] The coarse aggregate is well-graded, with needle flake content ≤ 5%, crushing value ≤ 15%, mud content ≤ 1%, particle size 10mm, and particle size controlled at 1 / 2 to 1 / 2 of the length of the steel fiber. Gravel within 2 / 3 range.

[0032] The length of the steel fiber is 20mm, the aspect ratio is (60-70):1, and the tensile strength of the steel fiber is not lower than 380MPa.

[0033] The quartz sand contains 30% by mass of 20-mesh quartz sand, ...

Embodiment 2

[0038] A super-early-strength black steel fiber concrete castable, the ratio of each raw material content in the super-early-strength black steel fiber concrete castable per cubic meter is as follows:

[0039]

[0040] The super-early-strength dry-mixed mortar contains 30% by mass of 42.5-grade ordinary Portland cement, 13% by mass of 42.5-grade sulphoaluminate cement, 43% by mass of quartz sand, and 4% by mass of fly ash per 100% by mass of components , 5% by mass of silica fume and 5% by mass of powdered water reducer.

[0041] The coarse aggregate is well-graded, with needle flake content ≤ 5%, crushing value ≤ 15%, mud content ≤ 1%, particle size 15mm, and the particle size is controlled at 1 / 2 to 1 / 2 of the length of the steel fiber. Gravel within 2 / 3 range.

[0042] The length of the steel fiber is 40 mm, the aspect ratio is 70:1, and the tensile strength of the steel fiber is not less than 380 MPa.

[0043] The quartz sand contains 30% by mass of 40-mesh quartz san...

Embodiment 3

[0048] A super-early-strength black steel fiber concrete castable, the ratio of each raw material content in the super-early-strength black steel fiber concrete castable per cubic meter is as follows:

[0049]

[0050] The super-early-strength dry-mixed mortar contains 30% by mass of 42.5-grade ordinary Portland cement, 13% by mass of 42.5-grade sulphoaluminate cement, 43% by mass of quartz sand, and 4% by mass of fly ash per 100% by mass of components , 5% by mass of silica fume and 5% by mass of powdered water reducer.

[0051] The coarse aggregate is well-graded, with needle flake content ≤ 5%, crushing value ≤ 15%, mud content ≤ 1%, particle size 10-15mm, particle size controlled at 1 / of the length of the steel fiber Gravel in the range of 2 to 2 / 3.

[0052] The length of the steel fiber is 30 mm, the aspect ratio is 65:1, and the tensile strength of the steel fiber is not less than 380 MPa.

[0053] The quartz sand contains 30% by mass of 30-mesh quartz sand, 50% by...

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Abstract

The invention discloses a super-early-strength black steel fiber concrete castable which is prepared by mixing super-early-strength dry-mixed mortar, a coarse aggregate, a coloring agent, steel fibersand other raw materials according to a certain proportion. The invention further discloses a using method of the super-early-strength black steel fiber reinforced concrete castable. The super-early-strength black steel fiber reinforced concrete castable disclosed by the invention has the characteristics of high early strength, good durability, small chromatic aberration with road asphalt concreteand the like, uses few types of materials, is simple and convenient in construction process, does not need to be rolled, is suitable for rapid repair of urban inspection well concrete, and can meet the functional requirement of rapidly opening traffic within 3 hours.

Description

technical field [0001] The invention relates to the technical field of road engineering. More specifically, the present invention relates to a super-early-strength black steel fiber concrete castable and its application method. Background technique [0002] At present, the construction of urban municipal engineering infrastructure is developing rapidly, and there are many problems in the service process of urban road inspection wells. Many new road pavement inspection wells that have been completed and opened to traffic for only one to two years often have problems such as noise of the manhole cover, height difference between the manhole cover and the surrounding asphalt, resulting in vehicle jumping, loose manhole covers and cracks in the surrounding asphalt. If it is not repaired in time, cracks and damage will appear around the inspection well after being rolled by heavy-duty vehicles for a long time. [0003] Traditional urban inspection well repair usually adopts asph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/0075C04B2201/50C04B7/02C04B14/06C04B18/08C04B18/146C04B2103/302C04B14/02C04B14/48C04B14/308
Inventor 丁沙罗艳明单瑶嘉汪林徐敏李冬冬邹勇张鹏童威徐浩王庆敏
Owner WUHAN HANYANG MUNICIPAL CONSTR GRP CO LTD
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