Roadbed grouting reinforcement material and preparation method thereof

Abstract

The invention is suitable for the technical field of roadbed grouting, and provides a roadbed grouting reinforcement material and a preparation method thereof. The roadbed grouting reinforcement material is prepared from the following components in parts by weight: 150 to 200 parts of P.O42.5 ordinary silicate cement, 550 to 600 parts of SCA sulphoaluminate cement, 150 to 200 parts of fly ash, 20 to 50 parts of silica fume, 0.1 to 0.3 part of an expanding agent, 1.5 to 3.5 parts of a water reducing agent and 6.7 to 13.5 parts of a functional small material bag, preferably, the functional package small material comprises the following components: cellulose ether, silicon element, a defoaming agent, a retarder, a coagulant and reinforced rubber powder; preferably, the functional bag small material is prepared from the following components in parts by mass: 0.2 to 0.4 part of cellulose ether, 5 to 10 parts of silicon element, 0.2 to 0.4 part of a de-foaming agent, 0.8 to 1.8 parts of a retarder, 0.3 to 0.6 part of a coagulant and 0.2 to 0.3 part of reinforced rubber powder. The product obtained by the scheme is high in strength, good in flowability and good in durability, and can improve the overall bearing capacity and impermeability of a roadbed and prolong the service life of a road.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed grouting, and in particular to a roadbed grouting reinforcement material and a preparation method thereof. Background Art

[0002] Roadbed grouting is a reinforcement and stabilization technology commonly used in road construction. It mainly improves the mechanical properties of the soil, increases the bearing capacity of the roadbed, and prevents or reduces settlement and deformation by injecting slurry into the roadbed soil layer or cracks.

[0003] Common grouting construction methods mainly include drilling grouting, grouting and perforation grouting. The drilling grouting method is to first drill a hole in the roadbed, inject the slurry into the soil layer through the hole, so that the slurry penetrates and fills the cracks or pores, thereby achieving reinforcement; the grouting method is to set multiple grouting holes on the roadbed, and inject the slurry into the soil through pumping equipment; the perforation grouting method uses a jetting device to inject the slurry into the deep soil layer through high pressure.

[0004] Most of the existing roadbed grouting reinforcement materials on the market have low strength, poor fluidity, and long setting time, and cannot meet the use requirements. Summary of the invention

[0005] The object of the present invention is to provide a roadbed grouting reinforcement material and a preparation method thereof, so as to solve the problems in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: In a first aspect, the present invention provides a roadbed grouting reinforcement material, which comprises the following components and contents by weight:

[0007] 150-200 parts of P.O42.5 ordinary silicate cement, 550-600 parts of SCA sulphoaluminate cement, 150-200 parts of fly ash, 20-50 parts of silica fume, 0.1-0.3 parts of expansion agent, 1.5-3.5 parts of water reducer and 6.7-13.5 parts of functional small material package.

[0008] Preferably, the activity index 28d of the fly ash and silica fume is ≥ 110%.

[0009] Preferably, the components of the functional package include cellulose ether, silicon steel, defoamer, retarder, accelerator and reinforcing rubber powder.

[0010] Preferably, the components of the functional package small material are 0.2-0.4 parts by weight of cellulose ether, 5-10 parts of silicon steel, 0.2-0.4 parts of defoaming agent, 0.8-1.8 parts of retarder, 0.3-0.6 parts of accelerator and 0.2-0.3 parts of reinforcing rubber powder.

[0011] Preferably, the defoamer is one or more of a silicon-based defoamer, a polyether defoamer, and a silicone defoamer.

[0012] Preferably, the retarder is one or more of a hydroxyphosphate retarder, a lignin sulfonate retarder, and a phosphate retarder.

[0013] Preferably, the coagulant is one or more of lithium sulfate and lithium carbonate.

[0014] Preferably, the expansion agent is one or more of an aluminum sulfate expansion agent, a calcium-based expansion agent or a sodium-based expansion agent.

[0015] Preferably, the water reducer is one or more of a lignin sulfonate water reducer and a polycarboxylate water reducer.

[0016] The second aspect of the present invention provides a method for preparing the roadbed grouting reinforcement material according to the first aspect of the present invention, comprising the following steps:

[0017] First, the cement silo is automatically metered into the mixing silo to start mixing. Then, sulphoaluminium cement and ordinary silica cement are automatically metered into the mixing silo in sequence. After mixing evenly, small functional material bags, expansion agent and water reducer, silica fume and fly ash are automatically metered into the mixing silo in sequence. After all the raw materials are evenly mixed, the materials are automatically discharged for packaging.

[0018] The present invention has at least the following beneficial effects:

[0019] The present invention provides a roadbed grouting reinforcement material and a preparation method thereof. The obtained product has high strength, good fluidity and good durability, and can improve the overall bearing capacity and anti-seepage performance of the roadbed, thereby extending the service life of the road. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] This embodiment provides a roadbed grouting reinforcement material, which includes the following components and contents by weight:

[0023] 150 parts of P.O42.5 ordinary silicate cement, 550 parts of SCA sulphoaluminate cement, 150 parts of fly ash, 20 parts of silica fume, 0.1 parts of expansion agent, 1.5 parts of water reducer and 6.7 parts of functional small material package.

[0024] Among them, the activity index of fly ash and silica fume 28d≥110%.

[0025] Among them, the components and mass fractions of the functional package small ingredients are as follows:

[0026] 0.2 parts of cellulose ether, 5 parts of silicon steel, 0.2 parts of defoamer, 0.8 parts of retarder, 0.3 parts of accelerator and 0.2 parts of reinforcing rubber powder;

[0027] The defoaming agent is a silicon-based defoaming agent; the retarder is a hydroxyphosphate retarder; and the accelerator is lithium sulfate.

[0028] Among them, the expansion agent is aluminum sulfate expansion agent; the water reducing agent is lignin sulfonate water reducing agent.

[0029] Example 2

[0030] This embodiment provides a roadbed grouting reinforcement material, which includes the following components and contents by weight:

[0031] 180 parts of P.O42.5 ordinary silicate cement, 570 parts of SCA sulphoaluminate cement, 180 parts of fly ash, 30 parts of silica fume, 0.2 parts of expansion agent, 2.5 parts of water reducing agent and 9.6 parts of functional small material package.

[0032] Among them, the activity index of fly ash and silica fume 28d≥110%.

[0033] Among them, the components and mass fractions of the functional package small ingredients are as follows:

[0034] 0.35 parts of cellulose ether, 7 parts of silicon steel, 0.3 parts of defoamer, 1.2 parts of retarder, 0.5 parts of accelerator and 0.25 parts of reinforcing rubber powder;

[0035] The defoaming agent is a polyether defoaming agent; the retarder is a lignin sulfonate retarder; and the accelerator is lithium carbonate.

[0036] Among them, the expansion agent is a calcium-based expansion agent; the water reducing agent is a polycarboxylate water reducing agent.

[0037] Example 3

[0038] This embodiment provides a roadbed grouting reinforcement material, which includes the following components and contents by weight:

[0039] 200 parts of P.O42.5 ordinary silicate cement, 600 parts of SCA sulphoaluminate cement, 200 parts of fly ash, 50 parts of silica fume, 0.3 parts of expansion agent, 3.5 parts of water reducer and 13.5 parts of functional small material package.

[0040] Among them, the activity index of fly ash and silica fume 28d≥110%.

[0041] Among them, the components and mass fractions of the functional package small ingredients are as follows:

[0042] 0.4 parts of cellulose ether, 10 parts of silicon steel, 0.4 parts of defoamer, 1.8 parts of retarder, 0.6 parts of accelerator and 0.3 parts of reinforcing rubber powder;

[0043] The defoaming agent is a silicone defoaming agent; the retarder is a phosphate retarder; and the accelerator is lithium sulfate.

[0044] Among them, the expansion agent is a sodium-based expansion agent; the water reducing agent is a polycarboxylate water reducing agent.

[0045] The preparation method of the roadbed grouting reinforcement material provided in the above embodiments 1-3 comprises the following steps:

[0046] First, the cement silo is automatically metered into the mixing silo to start mixing. Then, sulphoaluminium cement and ordinary silica cement are automatically metered into the mixing silo in sequence. After mixing evenly, small functional material bags, expansion agent and water reducer, silica fume and fly ash are automatically metered into the mixing silo in sequence. After all the raw materials are evenly mixed, the materials are automatically discharged for packaging.

[0047] A series of relevant performance tests were carried out on the products prepared in the above Examples 1-3, and the results are as follows:

[0048]

[0049]

[0050] In summary, the product obtained by the present invention is suitable for roadbed reinforcement, has high strength, good fluidity, and can improve the overall bearing capacity and anti-seepage performance of the roadbed, prevent moisture from infiltrating into the roadbed structure layer to destroy the stability of the roadbed, and can greatly reduce the damage to the later road surface and extend the service life of the road.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A roadbed grouting reinforcement material, characterized in that: The roadbed grouting reinforcement material includes the following components and contents in parts by mass: 150-200 parts of P.O42.5 ordinary silicate cement, 550-600 parts of SCA sulphoaluminate cement, 150-200 parts of fly ash, 20-50 parts of silica fume, 0.1-0.3 parts of expansion agent, 1.5-3.5 parts of water reducer and 6.7-13.5 parts of functional small material package.

2. A roadbed grouting reinforcement material according to claim 1, characterized in that: The activity index 28d of the fly ash and silica ash is ≥110%.

3. A roadbed grouting reinforcement material according to claim 1, characterized in that: The components of the functional package small material include cellulose ether, silicon steel, defoamer, retarder, accelerator and reinforcing rubber powder.

4. A roadbed grouting reinforcement material according to claim 3, characterized in that: The components of the functional package small material are 0.2-0.4 parts by weight of cellulose ether, 5-10 parts of silicon steel, 0.2-0.4 parts of defoaming agent, 0.8-1.8 parts of retarder, 0.3-0.6 parts of accelerator and 0.2-0.3 parts of reinforcing rubber powder.

5. The roadbed grouting reinforcement material according to claim 3, characterized in that: The defoamer is one or more of a silicon-based defoamer, a polyether defoamer, and an organosilicon defoamer.

6. A roadbed grouting reinforcement material according to claim 3, characterized in that: The retarder is one or more of a hydroxyphosphate retarder, a lignin sulfonate retarder, and a phosphate retarder.

7. A roadbed grouting reinforcement material according to claim 3, characterized in that: The coagulant is one or more of lithium sulfate and lithium carbonate.

8. The roadbed grouting reinforcement material according to claim 1, characterized in that: The expansion agent is one or more of an aluminum sulfate expansion agent, a calcium-based expansion agent or a sodium-based expansion agent.

9. The roadbed grouting reinforcement material according to claim 1, characterized in that: The water reducer is one or more of a lignin sulfonate water reducer and a polycarboxylate water reducer.

10. A method for preparing the roadbed grouting reinforcement material according to any one of claims 1 to 9, characterized in that: The following steps are involved: First, the cement silo is automatically metered into the mixing silo to start mixing. Then, sulphoaluminium cement and ordinary silica cement are automatically metered into the mixing silo in sequence. After mixing evenly, small functional material bags, expansion agent and water reducer, silica fume and fly ash are automatically metered into the mixing silo in sequence. After all the raw materials are evenly mixed, the materials are automatically discharged for packaging.

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