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Preparation method for slope protection concrete

A technology of concrete and rubber particles, applied in the field of concrete, can solve the problems of poor toughness and durability, low tensile strength, poor crack resistance, etc., and achieve the effects of good freeze-thaw resistance, increased crack resistance, and strong deformation ability.

Inactive Publication Date: 2015-09-09
长春市中路建筑工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low tensile strength, poor crack resistance, poor toughness and durability of traditional concrete, it is extremely easy to damage, and water often invades the soil along the cracks or damaged parts of the concrete surface to cause slope sliding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] A kind of preparation method of slope protection concrete of the present invention, it comprises the following steps:

[0015] (1) Add equal quality water in the rubber particles to make the rubber particles fully wet;

[0016] (2) Pour the stones and medium sand into the wet rubber granules, and stir evenly; wherein: 20-30 parts by weight of rubber aggregate, 110-180 parts by weight of stones, and 40-67 parts by weight of medium sand;

[0017] (3) Pour 45-75 parts by weight of cement and 10-20 parts by weight of water into the wet rubber particles, stones and medium sand, and then fully stir to make concrete; the maximum particle size of the stones does not exceed 25mm.

Embodiment 1

[0019] A foundation pit project is excavated to a depth of 5 meters. When excavating the earthwork, the foundation pit adopts a 1:1 slope, and the total length of the slope is 466.08m. The slope protection is constructed by pouring rubber aggregate concrete. The slope protection thickness is 10mm, and the rubber aggregate concrete is 158.0m in total. 3 . A steel mesh sheet with a specification of ￠8250 is set up on the slope to increase the tensile strength and prevent the impact of temporary loading.

[0020] The material preparation process is as follows:

[0021] (1) Add equal quality water in the rubber particles to make the rubber particles fully wet;

[0022] (2) Pour stones and medium sand into the wet rubber granules, and stir evenly; wherein: 20 parts by weight of rubber aggregate, 180 parts by weight of stones, and 50 parts by weight of medium sand;

[0023] (3) Pour 60 parts by weight of cement and 15 parts by weight of water into the wet rubber particles, stones ...

Embodiment 2

[0026] The excavation depth of a foundation pit project is 4.5 meters. The foundation pit adopts 1:1 grading during earthwork excavation. The total length of the slope is 573m. The slope protection is constructed by pouring rubber aggregate concrete. The thickness of the slope protection is 10mm, and the shared rubber aggregate concrete is 215.0m 3 . A steel mesh sheet with a specification of ￠8250 is set up on the slope to increase the tensile strength and prevent the impact of temporary loading.

[0027] The material preparation process is as follows:

[0028] (1) Add equal quality water in the rubber particles to make the rubber particles fully wet;

[0029] (2) Pour stones and medium sand into the wet rubber granules, and stir evenly; wherein: 30 parts by weight of rubber aggregate, 110 parts by weight of stones, and 40 parts by weight of medium sand;

[0030] (3) Pour 75 parts by weight of cement and 20 parts by weight of water into the wet rubber particles, stones and ...

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Abstract

The invention discloses a preparation method for slope protection concrete. The method includes the steps of: (1) adding equal mass water into rubber particles to fully moisten the rubber particles; (2) pouring stone and medium sand into the moist rubber particles, and stirring the mixture evenly, wherein the crumb rubber accounts for 20-30 parts by weight, the stone accounts for 110-180 parts by weight, and the medium sand accounts for 40-67 parts by weight; and (3) pouring 45-75 parts by weight of cement and 10-20 parts by weight of water into the moist rubber particles, stand and medium sand, and then stirring the materials fully into concrete, with the maximum particle size of stone not exceeding 25mm. Compared with traditional slope protection concrete, the rubber concrete provided by the invention has strong deformability, flexural ultimate strain up to over 500*10<-6>, elastic modulus lower than 2*10<5>MPa, and greatly increased bending toughness, fatigue resistance and crack resistance.

Description

technical field [0001] The invention relates to concrete, in particular to a preparation method of concrete for slope protection. Background technique [0002] When excavating foundation pits, in order to prevent rain from scouring or soaking the slope soil, resulting in slope soil sliding, causing safety accidents or affecting normal construction, it is necessary to carry out protective treatment on the slope. The conventional construction technology is to pour C15 concrete on the side slope of the foundation pit to cover the slope soil layer for slope protection, so as to reduce the erosion and soaking of rainwater or other construction water and enhance the stability of the slope. However, due to the low tensile strength, poor crack resistance, poor toughness and durability of traditional concrete, it is extremely easy to damage, and water often invades the soil along the cracks or damages of the concrete surface to cause slope sliding. Contents of the invention [000...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/22C04B18/20E02D17/04E02D17/20
CPCY02W30/91
Inventor 张立敏刘义猛段前忠张新民王建来
Owner 长春市中路建筑工程有限公司
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