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A kind of foamed concrete and method for repairing pavement subsidence using the same

A technology of foam concrete and pavement, which is applied to coagulation pavement, roads, roads and other directions paved on site, which can solve the problems of long rework and treatment of road closure period, reduced service life of road surface, uneven subsidence of roadbed, etc., and achieve shortening of condensation Time, save processing, reduce traffic obstruction effect

Active Publication Date: 2021-11-26
中交昆明建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the use of expressways and urban roads, roadbed defects will gradually enlarge under the repeated action of external natural conditions and vehicle loads. The more prominent problem is the uneven settlement and void of the roadbed, resulting in road subsidence, which seriously reduces the use of road surfaces. life and affect the safety of vehicles
Most of the current methods to solve road surface subsidence are rework, followed by high-pressure grouting, which is generally difficult to achieve after a long road closure cycle; high-pressure grouting is expensive, and the bulk density and strength of cement paste are higher than those of the original roadbed filler. Much, there is still a risk of uneven settlement after treatment

Method used

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  • A kind of foamed concrete and method for repairing pavement subsidence using the same
  • A kind of foamed concrete and method for repairing pavement subsidence using the same
  • A kind of foamed concrete and method for repairing pavement subsidence using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: A foam concrete, which includes 400kg of cement, 250kg of copper tailings powder, 200kg of stone powder, 40kg of admixture, 20kg of foaming agent and 150kg of water.

[0031] Among them, the cement is P.O42.5 grade, and the copper tailings powder is obtained from the residual material of copper ore primary separation and grinding tailings, and the particle size is less than 0.2mm. After testing, the copper tailings powder contains silica , Al2O3, Calcium Oxide, Ferric Oxide, and the content of SiO2 is relatively high, SiO2 has good activity, chemical reaction with cement can promote strength formation; stone powder is sieved by limestone rolling tailings obtained, the particle size is less than 0.075mm; the foaming agent is a high-efficiency protein foaming agent, and the foaming ratio is not less than 40 times; the water is drinking water. The admixture includes expansion agent, quick-setting agent, early strength agent and pumping agent, and its mass ratio ...

Embodiment 2

[0033] A foam concrete, which includes 320kg of cement, 240kg of copper tailings powder, 160kg of stone powder, 8kg of admixture, 16kg of foaming agent and 140kg of water.

[0034] Among them, the cement is P.O42.5 grade, and the copper tailings powder is obtained by sieving the tailings left over from the primary selection of copper ore, and the particle size is less than 0.2mm. The detection data of the copper tailings powder are the same as those in the example 1. The stone powder is obtained by screening limestone rolling tailings, with a particle size of less than 0.075mm; the foaming agent is a high-efficiency protein foaming agent, and the foaming ratio is not less than 40 times; the water is drinking water. The admixture includes expansion agent, quick-setting agent, early strength agent and pumping agent, and its mass ratio is 40:15:35:10; the expansion agent is a composite expansion agent of calcium chloride and calcium thiochlorate, which has the effect on foamed con...

Embodiment 3

[0036] A foam concrete, which includes 260kg of cement, 180kg of copper tailings powder, 120kg of stone powder, 8kg of admixture, 10kg of foaming agent and 210kg of water.

[0037] Among them, the cement is P.O42.5 grade, and the copper tailings powder is obtained by sieving the tailings left over from the primary selection of copper ore, and the particle size is less than 0.2mm. The detection data of the copper tailings powder are the same as those in the example 1. The stone powder is obtained by screening limestone rolling tailings, with a particle size of less than 0.075mm; the foaming agent is a high-efficiency protein foaming agent, and the foaming ratio is not less than 40 times; the water is drinking water. The admixture includes expansion agent, quick-setting agent, early strength agent and pumping agent, and its mass ratio is 50:10:20:20; the expansion agent is a composite expansion agent of calcium chloride and calcium thiochlorate, which has good properties for foam...

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Abstract

The invention discloses a foam concrete and a method for repairing road surface subsidence using the same. The foam concrete comprises the following raw materials in parts by weight: 40-70 parts of cement, 10-30 parts of copper tailings powder, and 10-20 parts of stone powder , 1~5 parts of admixture, 1~12 parts of foaming agent and 15~35 parts of water. When concrete road surface subsidence is repaired, it is injected into the site to be repaired by pressure injection. The performance of the foamed concrete is similar to that of the original roadbed filler, and the compatibility is good. Concentrate the load, so that the phenomenon of uneven settlement continues; and the pressure injection process can support the settled pavement surface layer with the help of filling pressure, so as to achieve the effect of self-adaptive restoration of the settled surface layer.

Description

technical field [0001] The invention belongs to the field of highways and municipal buildings, and relates to foam concrete, in particular to a foam concrete and a method for repairing road surface subsidence using the foam concrete. Background technique [0002] During the use of expressways and urban roads, roadbed defects will gradually enlarge under the repeated action of external natural conditions and vehicle loads. The more prominent problem is the uneven settlement and void of the roadbed, resulting in road subsidence, which seriously reduces the use of road surfaces. life and affect the safety of vehicles. Most of the current methods to solve road surface subsidence are rework, followed by high-pressure grouting, which is generally difficult to achieve after a long road closure period; high-pressure grouting is expensive, and the bulk density and strength of cement paste are higher than those of the original roadbed filler. Much, there will still be a risk of uneve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/10E01C7/14C04B111/40C04B111/72
CPCC04B28/04C04B38/10C04B2111/40C04B2111/72E01C7/147C04B18/12C04B14/28C04B22/002C04B24/14C04B22/124C04B22/14C04B22/126C04B24/122C04B2103/0068
Inventor 马荣增郑琦七唐森方金秋叶春晓徐锦兴宋俊江朱勋越牛天平
Owner 中交昆明建设有限公司
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