CN108101474A - Anti- isolation road rapid repair material of low temperature contracting Self-leveling and preparation method thereof - Google Patents

Abstract

The present invention relates to anti-isolation road rapid repair materials of a kind of low temperature contracting Self-leveling and preparation method thereof, and low temperature contracting Self-leveling is anti-to isolate road rapid repair material, including：Composite gelled material：30 50%；Hydration inhibitors：1 2%；Chemical water-reducing agent：0.1 0.3%；Physics water-reducing agent：2 5%；Segregation reducing agent：1 2%；Adjust solidifying component：0.1 0.2%；Fiber：1 2%；Sand：20 35%；Stone：20 35%.The present invention is by filling the functional materials such as hydration inhibitors, segregation reducing agent and physics water-reducing agent, with reference to high-speed stirred pulping process, it prepared lower temperature contraction, isolated, the restoring material of Self-leveling, it can ensure the repairing quality at first-aid repair construction position, and with high durable, the characteristics of long-life, it is high to solve the problems, such as that current restoring material repaiies rate again.

Description

Low-temperature shrinkage self-leveling anti-segregation road repair material and preparation method thereof

technical field

The invention relates to the field of road and bridge engineering, in particular to a low-temperature shrinkage self-leveling anti-segregation road repair material and a preparation method thereof.

Background technique

At present, with the development of my country's economy, the traffic volume is also increasing rapidly. The large traffic volume, overloading, and harsh use environment have caused damage to many roads and bridges. Most of them are local damage and need to be repaired. Due to the traffic volume Large, the stop of traffic will cause road congestion, and we can only organize emergency repair construction to restore traffic within a few hours, excluding the time lost by other processes. At this time, it is often required that the strength of emergency repair materials can reach more than 40Mpa in one hour to meet the requirements of open traffic. However, due to the temperature shrinkage of the repair material, the uneven filling of the repair material caused by the irregular repair part, and the segregation of the uneven material on site, the quality of the repair is very poor, and it is easy to damage the part again, resulting in repair. rate is particularly high.

Contents of the invention

The main purpose of the present invention is to provide a new type of low-temperature shrinkage self-leveling anti-segregation road repair material and its preparation method. The technical problem to be solved is to ensure the repair quality of the repair construction site, and high durability and long life. more practical.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. A low-temperature shrinkage self-leveling anti-segregation road repair material proposed according to the present invention comprises:

Composite cementitious material: 30-50%;

Hydration heat inhibitor: 1-2%;

Chemical water reducer: 0.1-0.3%;

Physical water reducer: 2-5%;

Anti-segregation agent: 1-2%;

Coagulation adjustment component: 0.1-0.2%;

Fiber: 1-2%;

Sand: 20-35%;

Pebbles: 20-35%.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

Preferably, the aforementioned low-temperature shrinkage self-leveling anti-segregation road repair material, wherein the composite cementitious material includes cement clinker and gypsum, wherein the cement clinker is Portland cement clinker, sulphoaluminate cement At least one of clinker and aluminate cement clinker.

Preferably, the aforementioned low-temperature shrinkage self-leveling anti-segregation anti-segregation road repair material, wherein the chemical water reducer is an early-strength polycarboxylate water reducer, and the 1d compressive strength ratio is greater than or equal to 150%.

Preferably, the aforementioned low-temperature shrinkable self-leveling anti-segregation road repair material, wherein the physical water reducer is fly ash, and the vitreous content in the fly ash exceeds 70%.

Preferably, the aforementioned low-temperature shrinkable self-leveling anti-segregation road repair material, wherein the anti-segregation agent is at least one of polymer water-absorbing resin, cellulose ether and bentonite.

Preferably, the aforementioned low-temperature shrinkable self-leveling anti-segregation road repair material, wherein the set-adjusting component is at least one of sodium gluconate, boric acid, fructose and lithium salt.

Preferably, the aforementioned low-temperature shrinkage self-leveling anti-segregation road repair material, wherein the fibers are steel fibers, and the tensile strength of the steel fibers is greater than or equal to 1800 MPa.

Preferably, the aforementioned low-temperature shrinkage self-leveling anti-segregation road repair material, wherein the compressive strength of the low-temperature shrinkage self-leveling anti-segregation road repair material 1h is greater than 45 MPa.

The purpose of the present invention and the solution to its technical problems are also achieved by the following technical solutions. According to the preparation method of a low-temperature shrinkage self-leveling anti-segregation road repair material proposed by the present invention, it comprises:

1) Stir the composite gelling material, hydration heat inhibitor, chemical water reducer, physical water reducer, anti-segregation agent, fiber and sand at high speed to obtain self-leveling mortar;

2) The self-leveling mortar described above is mixed with the coagulation-adjusting component and stones to obtain a low-shrinkage self-leveling anti-segregation road repair material.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

Preferably, the aforementioned low-temperature shrinkage self-leveling anti-segregation anti-segregation road repair material preparation method, wherein the speed of the high-speed stirring is greater than 2000 revolutions/min.

By virtue of the above technical solution, the low-temperature shrinkage self-leveling anti-segregation anti-segregation road repair material and its preparation method of the present invention have at least the following advantages: the present invention combines functional materials such as heat of hydration inhibitors, anti-segregation agents and physical water reducers, combined The high-speed stirring pulping process has produced low-temperature shrinkage, non-segregation, and self-leveling emergency repair materials, which can ensure the repair quality of emergency repair construction parts. The compressive strength of low-temperature shrinkage self-leveling anti-segregation road emergency repair materials is greater than 45MPa for 1 hour; half The adiabatic temperature rise reduction value is 8-15°C, which can avoid a large amount of temperature shrinkage during the cooling process, which will cause damage; the expansion degree is 670-690mm, which can achieve a self-leveling state. The material has the characteristics of high durability and long life, which solves the problem of high repair rate of current emergency repair materials.

The above description is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly and implement them according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below.

Description of drawings

Figure 1 is a schematic diagram of the temperature rise results of road repair materials in Example 1 and Comparative Example.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, the low-temperature shrinkage self-leveling anti-segregation road repair material proposed according to the present invention and its preparation method are detailed Embodiments, structures, features and effects thereof are described in detail below. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

One embodiment of the present invention proposes a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

Composite cementitious material: 30-50%;

Hydration heat inhibitor: 1-2%;

Chemical water reducer: 0.1-0.3%;

Physical water reducer: 2-5%;

Anti-segregation agent: 1-2%;

Coagulation adjustment component: 0.1-0.2%;

Fiber: 1-2%;

Sand: 20-35%;

Pebbles: 20-35%.

Preferably, the composite cementitious material is at least one of Portland cement clinker, sulphoaluminate cement clinker, aluminate cement clinker and gypsum.

Preferably, the chemical water reducer is an early-strength polycarboxylate water reducer, and the 1d compressive strength ratio is ≥ 150%.

Preferably, the physical water reducer is fly ash, and the vitreous content in the fly ash exceeds 70%.

Preferably, the anti-segregation agent is at least one of polymer water-absorbing resin, cellulose ether and bentonite.

Preferably, the coagulation adjusting component is at least one of sodium gluconate, boric acid, fructose and lithium salt.

Preferably, the fibers are steel fibers, and the tensile strength of the steel fibers is greater than or equal to 1800MPa.

Preferably, the sand is quartz sand with a mesh number of 6-200.

Preferably, the stones are stones for ordinary commercial concrete.

Preferably, the compressive strength of the low-temperature shrinkage self-leveling anti-segregation road emergency repair material for 1 hour is greater than 45 MPa, which can meet the emergency repair construction requirements.

Preferably, the heat of hydration inhibitor reduces the heat of hydration ≥ 30% within 24 hours.

The semi-adiabatic temperature rise reduction value is 8-15°C, which can avoid a large amount of temperature shrinkage during the cooling process, which will cause damage; the expansion degree is 670-690mm, which can reach a self-leveling state.

Another embodiment of the present invention proposes a method for preparing a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

1) Stir the composite gelling material, hydration heat inhibitor, chemical water reducer, physical water reducer, anti-segregation agent, fiber and sand at high speed to obtain self-leveling mortar;

2) The self-leveling mortar described above is mixed with the coagulation-adjusting component and stones to obtain a low-shrinkage self-leveling anti-segregation road repair material.

The preferred high-speed stirring rate is greater than 2000 revolutions/min.

Example 1

One embodiment of the present invention proposes a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

Composite cementitious material: 50%;

Heat of Hydration Inhibitor: 2%;

Chemical water reducer: 0.3%;

Physical water reducer: 5%;

Anti-segregation agent: 1.5%, which is water-absorbing resin, cellulose ether and bentonite;

Adjusting component: 0.2%, fructose and lithium salt

Steel fiber: 1%, the tensile strength is 2100MPa;

Quartz sand: 20%, graded quartz sand with a mesh number of 6-200;

Stones: 20%, are washed stones.

Among them, the composite cementitious material includes 40% of ordinary Portland cement clinker, 5% of sulphoaluminate cement clinker, and 5% of dihydrate gypsum.

Another embodiment of the present invention proposes a method for preparing a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

1) Stir the composite gelling material, hydration heat inhibitor, chemical water reducer, physical water reducer, anti-segregation agent, fiber and sand at high speed at 2700 rpm to obtain self-leveling mortar;

2) Mix the self-leveling mortar with the coagulation-adjusting component and stones to obtain the low-shrinkage self-leveling anti-segregation road repair material of Example 1.

Conduct compressive strength test according to GB 50081, conduct slump and expansion test according to GB 50080, conduct segregation rate test according to JGJ/T 283-2012, simulate the actual working conditions to form a concrete slab of 1m*1m*0.1m, adopt electric heating Blanket curing, and test the maximum temperature rise of the concrete core, the test results are shown in Table 1. The expansion degree of the low-temperature shrinkage self-leveling anti-segregation road repair material in Example 1 can reach 680mm, which can reach the state of self-leveling.

The test result of the road repair material of table 1 embodiment 1-4 and comparative example

A comparative example of the present invention is the WGM repair material produced by Tianjin Baoming Co., Ltd. The road repair materials of Example 1 and comparative examples were subjected to the forming semi-adiabatic temperature test, and the temperature rise results are shown in Figure 1. Curve 1 is the temperature rise result of the low-temperature shrinkage self-leveling anti-segregation road repair material of Example 1, and curve 2 It is the temperature rise result of the road repair materials of the comparative example. As shown in the figure, Example 1 can reduce the maximum temperature rise of concrete, avoiding a large amount of temperature shrinkage during the cooling process, thus causing damage.

Example 2

One embodiment of the present invention proposes a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

Composite cementitious material: 30%;

Hydration heat inhibitor: 1%;

Chemical water reducer: 0.1%;

Physical water reducer: 2%;

Anti-segregation agent: 1%, which is water-absorbing resin, cellulose ether and bentonite;

Coagulation regulator component: 0.1%, boric acid and lithium salt;

Steel fiber: 2%, the tensile strength is 2100MPa;

Sand: 35%, the mesh number is 6-200;

Stones: 28.8%, are washed stones.

Among them, the composite cementitious material includes 20% of ordinary Portland cement clinker, 5% of sulphoaluminate cement clinker, and 5% of dihydrate gypsum.

Another embodiment of the present invention proposes a method for preparing a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

1) Stir the composite gelling material, hydration heat inhibitor, chemical water reducer, physical water reducer, anti-segregation agent, fiber and sand at high speed at 2500 rpm to obtain self-leveling mortar;

2) The self-leveling mortar described above is mixed with the coagulation adjusting component and stones to obtain the low-temperature shrinkage self-leveling anti-segregation road repair material of Example 2.

Conduct compressive strength test according to GB 50081, conduct slump and expansion test according to GB 50080, conduct segregation rate test according to JGJ/T 283-2012, simulate the actual working conditions to form a concrete slab of 1m*1m*0.1m, adopt electric heating Blanket curing, and test the maximum temperature rise of the concrete core, the test results are shown in Table 1.

Example 3

One embodiment of the present invention proposes a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

Composite cementitious material: 35%;

Heat of Hydration Inhibitor: 2%;

Chemical water reducer: 0.2%;

Physical water reducer: 5%;

Anti-segregation agent: 1.6%, which is water-absorbing resin, cellulose ether and bentonite;

Coagulation-adjusting components: 0.2%, sodium gluconate, boric acid and lithium salt;

Steel fiber: 1%, the tensile strength is 2200MPa;

Sand: 20%, the mesh number is 6-200;

Stone: 35%, for washed stone.

Among them, the composite cementitious material includes 25% of ordinary Portland cement clinker, 5% of sulphoaluminate cement clinker, and 5% of dihydrate gypsum.

Another embodiment of the present invention proposes a method for preparing a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

1) Stir the composite gelling material, hydration heat inhibitor, chemical water reducer, physical water reducer, anti-segregation agent, fiber and sand at high speed at 2500 rpm to obtain self-leveling mortar;

2) The self-leveling mortar described above is mixed with the coagulation-adjusting component and stones to obtain the low-temperature shrinkage self-leveling anti-segregation road repair material of Example 3.

Conduct compressive strength test according to GB 50081, conduct slump and expansion test according to GB 50080, conduct segregation rate test according to JGJ/T 283-2012, simulate the actual working conditions to form a concrete slab of 1m*1m*0.1m, adopt electric heating Blanket curing, and test the maximum temperature rise of the concrete core, the test results are shown in Table 1.

Example 4

One embodiment of the present invention proposes a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

Composite cementitious material: 34%;

Hydration heat inhibitor: 1.6%;

Chemical water reducer: 0.2%;

Physical water reducer: 5%;

Anti-segregation agent: 2%, which is water-absorbing resin, cellulose ether and bentonite;

Coagulation-adjusting components: 0.2%, fructose, boric acid and lithium salt;

Steel fiber: 1%, the tensile strength is 1800MPa;

Quartz sand: 28%, mesh number 6-200;

Stone: 28%, washed stone.

Among them, the composite cementitious material includes 24% of ordinary Portland cement clinker, 5% of sulphoaluminate cement clinker, and 5% of dihydrate gypsum.

Another embodiment of the present invention proposes a method for preparing a low-temperature shrinkage self-leveling anti-segregation road repair material, which includes:

1) Stir the composite gelling material, hydration heat inhibitor, chemical water reducer, physical water reducer, anti-segregation agent, fiber and sand at high speed at 2700 rpm to obtain self-leveling mortar;

2) The self-leveling mortar described above is mixed with the coagulation-adjusting component and stones to obtain the low-temperature shrinkage self-leveling anti-segregation road repair material of Example 3.

Conduct compressive strength test according to GB 50081, conduct slump and expansion test according to GB 50080, conduct segregation rate test according to JGJ/T 283-2012, simulate the actual working conditions to form a concrete slab of 1m*1m*0.1m, adopt electric heating Blanket curing, and test the maximum temperature rise of the concrete core, the test results are shown in Table 1.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (10)

1. a kind of anti-isolation road rapid repair material of low temperature contracting Self-leveling, which is characterized in that it includes：

Composite gelled material：30-50%；

Hydration inhibitors：1-2%；

Chemical water-reducing agent：0.1-0.3%；

Physics water-reducing agent：2-5%；

Segregation reducing agent：1-2%；

Adjust solidifying component：0.1-0.2%；

Fiber：1-2%；

Sand：20-35%；

Stone：20-35%.

2. the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 1, which is characterized in that described is compound Cementitious material includes clinker and gypsum, wherein the clinker is Portland clinker, sulphate aluminium cement is ripe At least one of material, aluminate cement clinker.

3. the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 1, which is characterized in that the chemistry Water-reducing agent is Early-strength polycarboxylate superplasticizer, and 1d compressive strength rates are more than or equal to 150%.

4. the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 1, which is characterized in that the physics Water-reducing agent is flyash, and vitreum content is more than 70% in the flyash.

5. the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 1, which is characterized in that it is described resist from Analysis agent is at least one of hydroscopic high-molecular resin, cellulose ether and bentonite.

6. the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 1, which is characterized in that the tune coagulates Component is at least one of sodium gluconate, boric acid, fructose and lithium salts.

7. the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 1, which is characterized in that the fiber For steel fibre, the tensile strength of the steel fibre is more than or equal to 1800MPa.

8. the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 1, which is characterized in that the low temperature The compression strength of the anti-isolation road rapid repair material 1h of contracting Self-leveling is more than 45MPa.

9. a kind of preparation method of the anti-isolation road rapid repair material of low temperature contracting Self-leveling, which is characterized in that it includes：

1) by composite gelled material, hydration inhibitors, chemical water-reducing agent, physics water-reducing agent, segregation reducing agent, fiber, Sha Heshui High-speed stirred, ratio of water to material 0.1, obtains gravity flowing levelling mortar；

2) gravity flowing levelling mortar is obtained into the anti-isolation road rapid repair material of low temperature contracting Self-leveling with solidifying component, stone is adjusted to mix Material.

10. the preparation method of the anti-isolation road rapid repair material of low temperature contracting Self-leveling according to claim 9, feature exist In the rate of the high-speed stirred is more than 2000 turns/min.