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Sprayed basalt fiber concrete and side slope supporting surface layer construction method

A technology of basalt fiber and concrete, which is applied in excavation, foundation structure engineering, construction, etc., can solve the problems of poor soil slope deformation adaptability, affecting soil slope stability, poor shotcrete compactness, etc., and achieves improved use environment, improving the ability to resist sulfate erosion, and reducing the loss of jet rebound

Inactive Publication Date: 2017-03-15
ZHEJIANG HENGDIAN CONSTR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of sprayed ordinary concrete to support the surface layer has the following defects: ① large rebound loss and serious waste during spraying; ② the formed structure is brittle and poor in toughness, and has poor adaptability to the deformation of soil slopes; ③ easy to produce cracks , causing water seepage in the support surface, destroying the supported soil structure, thereby affecting the stability of the soil slope, and causing hidden dangers of safety accidents; ⑤ When deploying steel mesh sheets in the sprayed layer of the slope, it is difficult to ensure safety due to the air-bound binding operation.

Method used

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Experimental program
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Effect test

Embodiment 1

[0052] In this embodiment, according to the design of C20 sprayed basalt fiber concrete, the mass parts of materials used per cubic meter are as follows:

[0053] 3 parts of basalt fiber, 365 parts of P.O42.5 cement, 36 parts of Class II fly ash, 18 parts of S95 granulated blast furnace slag, 19 parts of metakaolin, 3 parts of L-21 cement-based osmotic crystal, 4 parts of CTF composite synergist, 13 parts of 711-type accelerator, 4 parts of polycarboxylate superplasticizer, 925 parts of river sand, 815 parts of gravel, and 172 parts of water;

[0054] Technical indicators: water-binder ratio 0.39, glue-bone ratio 0.25, sand ratio 0.53, bulk density 2377kg / m3.

[0055] Measure the concrete strength of present embodiment as following table:

[0056] age Compressive strength tensile strength 1d 10.6 1.2 7d 28.2 2.2 28d 39.3 2.6

Embodiment 2

[0058] In this embodiment, according to the design of C25 sprayed basalt fiber concrete, the mass parts of materials used per cubic meter are as follows:

[0059] 3 parts of basalt fiber, 385 parts of P.O42.5 cement, 39 parts of Class II fly ash, 19 parts of S95 granulated blast furnace slag, 20 parts of metakaolin, 4 parts of L-21 cement-based osmotic crystal, 4.5 parts of CTF composite synergist, 16 parts of 711-type accelerator, 4.5 parts of polycarboxylate superplasticizer, 915 parts of river sand, 800 parts of gravel, and 176 parts of water;

[0060] Technical indicators: water-binder ratio 0.38, glue-bone ratio 0.27, sand ratio 0.53, bulk density 2386kg / m3.

[0061] Measure the concrete strength of present embodiment as following table:

[0062] age Compressive strength tensile strength 1d 11.2 1.3 7d 30.5 2.3 28d 42.7 2.7

Embodiment 3

[0064] In this embodiment, according to the design of C30 sprayed basalt fiber concrete, the mass parts of materials used per cubic meter are as follows:

[0065] 3 parts of basalt fiber, 410 parts of P.O42.5 cement, 41 parts of Class II fly ash, 20 parts of S95 granulated blast furnace slag powder, 21 parts of metakaolin, 5 parts of L-21 cement-based osmotic crystal, 5 parts of CTF composite synergist, 19 parts of 711-type accelerator, 5 parts of polycarboxylate superplasticizer, 900 parts of river sand, 785 parts of gravel, and 182 parts of water;

[0066] Technical indicators: water-binder ratio 0.37, glue-bone ratio 0.29, sand ratio 0.53, bulk density 2396kg / m3.

[0067] Measure the concrete strength of present embodiment as following table:

[0068] age Compressive strength tensile strength 1d 11.8 1.3 7d 38.5 2.6 28d 51.1 3.0

[0069] The technical solution to further solve the problem that the shotcrete mix ratio meets the design a...

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Abstract

The invention discloses sprayed basalt fiber concrete and a side slope supporting surface layer construction method. The sprayed basalt fiber concrete per cubic meter comprises, by weight, 2-4 parts of basalt fibers, 365-410 parts of cement, 73-82 parts of superfine active mineral admixtures, 3-5 parts of cement based permeable crystal, 4-5 parts of concrete compound synergist, 13-19 parts of accelerating agents, 4-5 parts of water reducing agents, 900-925 parts of river sand, 785-815 parts of broken stones and 170-185 parts of water. Compared with the prior art, the sprayed concrete prepared by mixing the basalt fibers is good in consistency and workability, stable in volume and low in spraying rebound loss, tensile strength, crack resistance and frost resistance are remarkably improved, service life is prolonged, and service environments are improved.

Description

technical field [0001] The invention relates to the technical field of soil side slope support, in particular to a new method for construction of a sprayed concrete material and a side slope spray support surface structure. Background technique [0002] Shotcrete anchor support is a structural system composed of high-pressure sprayed concrete surface and metal anchors embedded in the soil, so that the concrete surface, metal anchors and soil work together to transform the soil of a certain thickness into a natural arch. In order to effectively stabilize the soil slope and prevent the soil slope from sliding and collapsing; according to the geological and slope conditions, the shotcrete structural surface can also be used alone. [0003] As a safety technology for soil slope support, shotcrete support has become a relatively mature construction method for support structures in the field of construction after years of practice and application. [0004] However, the use of spr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E02D17/20
CPCC04B28/04C04B2111/00293C04B2201/50E02D17/20
Inventor 黄琦伟申屠龙强葛向华郑文涛吴雄亮
Owner ZHEJIANG HENGDIAN CONSTR ENG CO LTD
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