CN111018457B - Quick-setting high-strength anti-cracking pavement patching material and preparation method and application thereof - Google Patents
Quick-setting high-strength anti-cracking pavement patching material and preparation method and application thereof Download PDFInfo
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- CN111018457B CN111018457B CN201911391902.1A CN201911391902A CN111018457B CN 111018457 B CN111018457 B CN 111018457B CN 201911391902 A CN201911391902 A CN 201911391902A CN 111018457 B CN111018457 B CN 111018457B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
- Road Repair (AREA)
Abstract
The invention relates to a fast-setting high-strength anti-cracking pavement patching material and a preparation method and application thereof, belonging to the technical field of cement production, and the pavement patching material comprises the following raw materials in percentage by mass: 50-60% of micro-expansion moderate heat portland cement and sulphoaluminate cement, and 40-50% of auxiliary materials, wherein the proportion of the micro-expansion moderate heat portland cement is as follows: the mass ratio of the sulphoaluminate cement is 1: (1-3); the auxiliary material comprises the following raw materials in percentage by mass: 0.4-0.6% of fiber, 2.5% of rubber powder, 0.2% of water reducing agent, 0.03% of defoaming agent, 31-34% of fine sand and 8-11% of fly ash, wherein the proportion of the fiber, the rubber powder, the water reducing agent, the defoaming agent, the fine sand and the fly ash is the percentage of the mass of the whole patching material. The invention utilizes the micro-expansive moderate heat portland cement and the sulphoaluminate cement as auxiliary materials to prepare the rapid-setting high-strength anti-cracking pavement patching material, reduces the cost of road patching, realizes rapid patching and has obvious economic and social benefits.
Description
Technical Field
The invention belongs to the technical field of cement production, and particularly relates to a quick-setting high-strength anti-cracking pavement patching material and a preparation method and application thereof.
Background
After the road is in service for a long time, and particularly after the road frequently passes through heavy vehicles, a plurality of cracks can occur, so that the use of the road is influenced, the potential safety hazard is increased, and the attractiveness of the whole plant area is influenced. In order to solve the problem, the company discusses two solutions, namely repairing the cracked road again and repairing the cracked road by using a high-strength anti-cracking quick repairing material. The method of re-repairing the cracked road not only takes a long time to influence the use of the road, but also has very high manufacturing cost. In order to solve the problem of road cracking, the rapid-setting high-strength anti-cracking pavement patching material which can be used for rapidly patching and traffic in a short time and has low patching cost needs to be developed urgently.
Disclosure of Invention
The invention aims to provide a quick-setting high-strength anti-cracking pavement patching material, which has the similar property with an externally purchased pavement patching material, can replace the commercially purchased pavement patching material for repairing a road, and reduces the maintenance cost.
The invention also aims to provide a preparation method of the rapid-setting high-strength anti-cracking pavement patching material.
The invention also aims to provide application of the rapid-setting high-strength anti-cracking pavement patching material and realize rapid patching.
The invention is realized in such a way that a fast-setting high-strength anti-cracking pavement patching material comprises the following raw materials in percentage by mass: 50-60% of micro-expansion moderate heat portland cement and sulphoaluminate cement, and 40-50% of auxiliary materials, wherein the proportion of the micro-expansion moderate heat portland cement is as follows: the mass ratio of the sulphoaluminate cement is 1: (1-3).
In the technical scheme, the preferable fast-setting high-strength anti-cracking pavement patching material comprises the following raw materials in percentage by mass: 53-57% of micro-expansion moderate heat portland cement and sulphoaluminate cement, and 44-46% of auxiliary materials.
In the above technical solution, preferably, the micro-expansive moderate heat portland cement: the mass ratio of the sulphoaluminate cement is 1:2.
in the above technical solution, preferably, the auxiliary material includes the following raw materials by mass: 0.4-0.6% of fiber, 2.5% of rubber powder, 0.2% of water reducing agent, 0.03% of defoaming agent, 31-34% of fine sand and 8-11% of fly ash, wherein the proportion of the fiber, the rubber powder, the water reducing agent, the defoaming agent, the fine sand and the fly ash is the percentage of the mass of the whole patching material.
In the above technical solution, preferably, the content of MgO in the micro-expansive moderate heat portland cement is 4.5% to 5.5%.
The preparation method of the rapid-setting high-strength anti-cracking pavement patching material comprises the following steps:
1) Uniformly mixing fiber, rubber powder, a water reducing agent, a defoaming agent, fine sand and fly ash according to a certain proportion to prepare an auxiliary material, and improving the crack resistance of the pavement patching material;
2) And uniformly mixing the micro-expansive moderate heat portland cement, the sulphoaluminate cement and the auxiliary materials according to a certain proportion to obtain the rapid-setting high-strength anti-crack pavement patching material.
The application of the rapid-setting high-strength anti-crack pavement patching material in pavement repair is provided.
Compared with the prior art, the invention has the advantages and positive effects that:
1) The invention uses the micro-expansion moderate heat silicate cement as the base and uses the characteristic of high strength to ensure the high strength performance of the material, the 1 day compressive strength of the mortar is more than 30.0MPa, and the 3 days compressive strength reaches more than 42.5 MPa;
2) By adding sulphoaluminate cement and adjusting the mixing proportion of the two types of cement, the setting time of the repairing material is controllable, the setting speed can be adjusted according to the construction requirement, and the setting time of the repairing material is controlled to be adjustable within 30-240 min;
3) Series auxiliary materials (fiber, rubber powder, a water reducing agent, a defoaming agent, fine sand and fly ash) are added into the repairing material, so that the cracking condition caused by heat release in the cement hydration process can be improved, and the repairing material has higher cracking resistance. Cracking is the main reason for the reduction of the durability of the concrete, effectively overcomes the cracking condition and prolongs the service life of the concrete;
4) The rapid-setting high-strength anti-cracking pavement patching material is adopted to reduce the pavement patching cost, and can save the patching cost;
5) Compared with the similar products in the market, the fast-setting high-strength anti-cracking pavement patching material has the advantages of lower cost, higher market competitiveness, and better practical application value and popularization value.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following examples are illustrated and described in detail as follows:
firstly, the micro-expansion moderate heat portland cement in the invention is prepared by Chinese patent publication No. CN103922618A with a patent name of 'micro-expansion moderate heat portland cement and a preparation method thereof'.
The specific preparation process of the micro-expansion moderate heat portland cement comprises the following steps:
1) Raw material preparation: limestone, sandstone ore waste stone, alumina red mud, fly ash slag and iron ore which are stored in a raw material blending warehouse enter a raw material mill according to a certain proportion. The raw material mill is a roller press for final grinding, the ground material is selected by a powder selector, and the finished product is put into a raw material homogenizing warehouse;
2) A clinker calcining procedure: conveying the raw materials from the raw material homogenizing warehouse into a five-stage preheater through conveying equipment for preheating, performing pre-decomposition in a decomposing furnace outside the kiln, and then putting into the kiln for calcining; grinding raw coal for calcination into powder by a coal mill, making qualified coal powder into a coal powder bin, spraying the qualified coal powder into a rotary kiln and a decomposing furnace from a kiln head and a kiln tail respectively through pneumatic transmission, calcining raw materials reversely entering from the kiln tail into clinker, cooling the clinker by a grate cooler, feeding the clinker into a tank type conveyor, and sending the clinker into a clinker warehouse;
3) A finished product preparation procedure: the clinker, the desulfurized gypsum, the limestone mixed material and the mineral powder are fed into a cement mill through a quantitative feeder and a belt conveyor according to a certain proportion, wherein the mineral powder is mixed by a mill outlet chute. The ground material is carried into a powder concentrator through an air conveying chute and a bucket, coarse powder is ground again, fine powder enters a bag dust collector along with air flow, and the fine powder is collected as a cement finished product and is carried to a cement warehouse through the air conveying chute and the bucket.
The preparation method of the rapid-setting high-strength anti-cracking pavement patching material comprises the following steps:
1) Uniformly mixing fiber, rubber powder, a water reducing agent, a defoaming agent, fine sand and fly ash according to a certain proportion to prepare an auxiliary material, and improving the crack resistance of the pavement patching material;
2) The micro-expansion moderate heat portland cement, the sulphoaluminate cement and the auxiliary materials are uniformly mixed according to a certain proportion to obtain the fast-setting high-strength anti-crack pavement patching material.
1. The detection of the rapid-setting high-strength anti-cracking pavement patching material produced by micro-expansive moderate heat portland cement in different proportions is further explained as follows:
it should be noted that the clinker hereinafter referred to refers to a heat portland cement clinker in micro expansion unless otherwise specified.
Test one: twelve schemes of purchased grouting material of 'Kaijingaosheng', micro-expansive moderate heat portland cement (specifically, 32.5 cement or 42.5 cement), clinker and gypsum according to different proportions are subjected to experimental research, and experimental effect verification is carried out on a crack road surface, wherein the schemes are specifically shown in table 1.
Table 1 test 1 detection data of fast-setting high-strength crack-resistant pavement patching material produced in different proportions
And (4) test conclusion: according to the proportion, 500g of a sample is prepared according to each scheme, and a certain amount of water is added for stirring for 1 minute. Cleaning up dust in cracks on the crack pavement, watering and wetting, and adding various prepared repair materials to observe test results. Through the hardening index and the strength requirement, the test effect of the third scheme, the eighth scheme and the eleventh scheme is better.
And preparing 10 kg of samples according to the mixture ratio of the third, eighth and eleventh schemes, mixing with stones and a certain amount of water, performing a test on a cracked road surface for 2 hours without coagulation and later cracking, and not meeting the test requirements.
The analysis reason is as follows: because of the separation caused by adding stones, the condensation speed is reduced; and the grouting material has no strength and is fragile, so that cracking is caused.
And (2) test II: on the basis of the first test, the scheme is adjusted, auxiliary materials are added, and clinker, cement and silica fume are mixed with the auxiliary materials to prepare the repairing material, wherein the auxiliary materials comprise 9.6% of fly ash, 32% of fine sand, 2.5% of rubber powder, 0.6% of cellulose, 0.2% of a water reducing agent and 0.03% of a defoaming agent. The self-prepared repairing material, the purchased 'Diteman' repairing material and the rail material are respectively mixed with cement or clinker according to nine schemes of different proportions, experimental research is carried out, and experimental effect verification is carried out on the crack road surface, wherein the experimental results are shown in table 2.
Table 2 test 2 detection data of fast-setting high-strength anti-crack pavement patching material produced in different proportions
And (4) test conclusion: according to the mixture ratio, 500g of samples are prepared in each scheme, and a certain amount of water is added for stirring for 1 minute. And cleaning up dust in cracks on the crack pavement, and watering and wetting. And (4) putting various prepared repair materials into the mixture to observe test results.
According to the test data results, the fifth and sixth test schemes have good test effects. But the fifth scheme has the following cost: about 3700 yuan/ton, six costs of scheme: about 3800 yuan/ton, the cost is high, and a way for reducing the cost needs to be continuously researched.
After analysis: the repairing material has the characteristics of quick hardening, high early strength and similar action with sulphoaluminate cement. If sulphoaluminate cement is used for replacing the repair material, the final cost is greatly reduced.
And (3) test III: and summarizing the results of the second analysis test, mixing the sulphoaluminate cement, the clinker and the micro-expansion moderate heat portland cement with the auxiliary materials according to seven schemes in different proportions, carrying out experimental research, and carrying out experimental effect verification on the crack pavement, wherein the experimental results are shown in table 3.
Table 3 test 3 detection data of fast-setting high-strength crack-resistant pavement patching material produced in different proportions
500g of a sample was prepared for each protocol, and a certain amount of water was added thereto and stirred for 1 minute. Then cleaning up dust in cracks on the crack pavement, watering and wetting, and putting various prepared repair materials to observe test results.
And (3) analysis:
1) The repair material prepared by using the pure sulphoaluminate cement is similar to the repaired material purchased from 7700 yuan/ton in appearance, the effect difference is small, and compared with the repaired material purchased from outsourcing, the observed state has lighter color and more fibers.
2) The repairing materials prepared by using the micro-expansion moderate heat portland cement or the micro-expansion moderate heat portland cement clinker have small difference, the comprehensive production cost and the operation difficulty are considered, the preparation of the micro-expansion moderate heat portland cement is more suitable, and the setting time is easier to control.
3) From the cost, the cost of the scheme five is about 1003 yuan/ton, the cost of the scheme six is about 1092 yuan/ton, and the cost of the scheme seven is about 1064 yuan/ton.
4) In view of the difference of the characteristics of the sulphoaluminate cement and the thermal portland cement in micro-expansion, namely the sulphoaluminate cement quickly achieves the strength effect through a large amount of heat release by expansion; the micro-expansion moderate heat portland cement releases heat in stages and has lower heat release amount, thereby achieving the effects of having a certain strength grade, reducing the heat release amount and reducing the whole heat release amount. Whether cracking occurs in the later period or not needs to be further observed. The addition of a certain proportion of fibers prevents the occurrence of cracking.
And (4) testing: comprehensively considering, on the basis of the third test, optimally selecting the fifth scheme, the sixth scheme and the seventh scheme to prepare a large sample, and carrying out practical application tests.
The different proportions of the quick-setting high-strength anti-cracking pavement patching material produced in the actual use stage are shown in table 4:
table 4 data of fast-setting high-strength crack-resistant pavement patching material detection data produced by testing different proportions in actual use stage
The raw material costs for the three schemes in table 4 above are shown in table 5 below:
TABLE 5 raw material cost data for fast setting, high strength and crack resistance pavement patching material
The large-sample actual effect verification of the three schemes is carried out on the selected places of the cracked pavement, and the result is shown in table 6:
table 6 test 4 detection data of fast-setting high-strength crack-resistant pavement patching material produced in different proportions
| Test protocol | Test effects |
| 1 | 2 hours hardening, can pass through a tank car, and has poor construction effect |
| 2 | Hardening within 1.5 hours, can pass through a tank car, and has better construction effect |
| 3 | 2 hours of hardening, can pass through a tank car, and has better construction effect |
And (4) preparing the large-batch repairing material by adopting a third scheme according to the test effect, the field construction and the cost. The invention utilizes the quick hardening effect of the sulphoaluminate cement and the low heat release of the moderate heat Portland cement in the micro-expansion, and the later-stage enhancement effect is matched with the auxiliary material to achieve the characteristics of quick setting, high strength and crack resistance.
And preparing a two-ton scheme and three samples to carry out formal road repairing work on the cracked pavement.
Two ways are used for repairing:
the first method is as follows: cleaning the original foundation ground, sprinkling water and then directly filling and repairing.
The second method comprises the following steps: cutting the ground to ensure that the corners are vertical to the ground, cleaning the bottom, and then filling and repairing after sprinkling water.
The test effect is as follows:
effect after one hour: the first mode and the second mode can be hardened and can pass through a tank car, the first construction effect mode is simple, and money is saved.
The effect after one month is as follows: the first mode has better hardening effect but cracks appear at the corners, and the second mode has good hardening effect and no cracks.
The analysis reason is as follows: the first filling mode has the defects that the thickness of the repair material is not consistent, the stress is not uniform, and the edge is thinner due to the filling of the repair material, so that cracks can appear once the stress is too large. And in the second mode, the filling thickness of the repair material is consistent, and the stress is uniform, so that no crack occurs.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (4)
1. The fast-setting high-strength anti-crack pavement patching material is characterized by comprising the following raw materials in percentage by mass: 50-60% of micro-expansion moderate heat portland cement + sulphoaluminate cement and 40-50% of auxiliary materials, wherein the weight ratio of micro-expansion moderate heat portland cement: the mass ratio of the sulphoaluminate cement is 1: (1-3);
the auxiliary material comprises the following raw materials in percentage by mass: 0.4-0.6% of fiber, 2.5% of rubber powder, 0.2% of water reducing agent, 0.03% of defoaming agent, 31-34% of fine sand and 8-11% of fly ash, wherein the ratio of the fiber, the rubber powder, the water reducing agent, the defoaming agent, the fine sand and the fly ash is the percentage of the mass of the whole patching material;
the MgO content in the micro-expansive moderate heat portland cement is 4.5% -5.5%;
the preparation method of the rapid-setting high-strength anti-cracking pavement patching material comprises the following steps:
1) Uniformly mixing fiber, rubber powder, a water reducing agent, a defoaming agent, fine sand and fly ash according to a certain proportion to prepare an auxiliary material;
2) The micro-expansion moderate heat portland cement, the sulphoaluminate cement and the auxiliary materials are uniformly mixed according to a certain proportion to obtain the fast-setting high-strength anti-crack pavement patching material.
2. The fast-setting high-strength anti-cracking pavement patching material as claimed in claim 1, characterized in that: the fast-setting high-strength anti-cracking pavement patching material is composed of the following raw materials in percentage by mass: 53-57% of micro-expansion moderate heat portland cement and sulphoaluminate cement, and 44-46% of auxiliary materials.
3. The quick-setting high-strength anti-cracking pavement patching material as claimed in claim 1, which is characterized in that: the micro-expansion moderate heat portland cement: the mass ratio of the sulphoaluminate cement is 1:2.
4. the application of the rapid-setting high-strength anti-cracking pavement patching material according to any one of claims 1-3 in pavement patching to realize rapid patching.
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