CN111646759A - Preparation method of cement-based crack grouting material for road and bridge - Google Patents
Preparation method of cement-based crack grouting material for road and bridge Download PDFInfo
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- CN111646759A CN111646759A CN202010523719.9A CN202010523719A CN111646759A CN 111646759 A CN111646759 A CN 111646759A CN 202010523719 A CN202010523719 A CN 202010523719A CN 111646759 A CN111646759 A CN 111646759A
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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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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
- C04B24/14—Peptides; Proteins; Derivatives thereof
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/281—Polyepoxides
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- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H1/00—Macromolecular products derived from proteins
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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Abstract
The invention discloses a preparation method of a cement-based crack grouting material for a road bridge, which relates to the technical field of bridge concrete crack grouting materials and comprises the following steps: firstly, weighing the following raw materials: composite cement, composite emulsion, pearlife, halloysite clay, sepiolite velvet, epichlorohydrin graft copolymerization modified bone glue, fibrous xonotlite, composite water repellent, composite coupling agent and composite glue powder; carrying out grading short cutting on sepiolite wool; crushing and activating halloysite clay and xonotlite; and (4) mixing and stirring the materials. The crack grouting material has excellent slurry performance, bonding performance, processing performance and construction negative temperature action resistance, is strong in environmental adaptation and high in stress resistance, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of grouting materials, in particular to a preparation method of a cement-based crack grouting material for a road and bridge.
Background
In recent years, the traffic industry is rapidly developed, and the total mileage of roads in China reaches more than 400 kilometers. With the increase of the service life of roads and the increase of the loads of various complex geological environments and vehicles, the damage of the road bridges is more and more serious. In order to prolong the service life of a highway bridge and guarantee the normal traffic capacity of the highway, a concrete crack repairing material with comprehensive and excellent performance is urgently needed. The existing concrete crack repairing materials are various in variety, including glue injection type and cement base type, but because raw materials, formulas and preparation process technologies are monopolized by individual international large companies, bridge concrete crack repairing materials with independent intellectual property rights are not formed in the market at present, and indexes such as strength performance, constructability, ageing resistance and the like in the application process of the produced glue injection and repairing agent are required to be improved, so that repeated repair is caused in one place, and manpower, material resources and financial resources are greatly wasted.
The patent application with the publication number of CN106630926B discloses a composite material for self-repairing bridge cracks, which comprises the following raw materials in parts by weight: 80-100 parts of Portland cement, 1-20 parts of sodium citrate, 12-18 parts of basalt fiber, 4-16 parts of MC120 curing agent powder, 4-18 parts of tetraethylenepentamine curing agent, 20-40 parts of quartz sand, 1-8 parts of sodium benzoate, 10-30 parts of phosphate, 1-5 parts of sulfur, 2-8 parts of lithium oxychloride and 10-20 parts of epoxy resin; the composite material has good durability, but has poor waterproofness and limited applicability.
The patent application with the publication number of CN106336170A discloses a concrete product crack repairing material, which comprises the following components in percentage by mass: 45-60 parts of epoxy propylene resin, 15-19 parts of calcium aluminum sulfate, 20-30 parts of gypsum, 5-12 parts of limestone, 10-20 parts of hydroxymethyl cellulose, 15-32 parts of portland cement, 4-10 parts of sodium silicate, 15-20 parts of silicon dioxide, 3-9 parts of sodium benzoate and 8-15 parts of tributyl phosphate. The concrete product crack repairing material has good impermeability and long service life, but has poor strength performance and limited applicability.
Disclosure of Invention
The invention aims to provide a preparation method of a cement-based crack grouting material for a road and bridge, and the crack grouting material has excellent comprehensive performance and good applicability.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a preparation method of a cement-based crack grouting material for a road and bridge comprises the following steps:
step 1: weighing the following raw materials in parts by weight: 76-92 parts of composite cement, 7-9 parts of composite emulsion, 10-15 parts of pearlite sand, 8-12 parts of halloysite clay, 4-6 parts of sepiolite velvet, 3-5 parts of epichlorohydrin graft copolymerization modified bone glue, 6-10 parts of xonotlite, 1-2 parts of composite water repellent, 2-3 parts of composite coupling agent and 3-5 parts of composite rubber powder;
evenly chopping the sepiolite wool into pieces with the lengths of 5mm, 3mm, 1mm, 0.5mm and 0.1mm for later use;
step 2: mixing halloysite clay and xonotlite, crushing and grinding to 100-150 mu m, placing the ground material in sodium hypochlorite solution with the mass fraction of 1.35-1.75%, and carrying out ultrasonic treatment for 80-100min at the temperature of 38-42 ℃ and the material-liquid ratio of 1:5, wherein the frequency of ultrasonic waves is 25-35KHz, and the sound intensity is 0.15-0.25W/cm2Cooling to room temperature, filtering, washing, drying, roasting at 280 deg.C for 30-35min at 260 deg.C, and naturally cooling to 50-60 deg.C, and keeping the temperature for later use;
and step 3: and (2) firstly adding the composite cement and the composite emulsion into a mixer, mixing and stirring for 7-8min, then adding the pearlife, the short-cut sepiolite wool in the step (1), the halloysite clay and the xonotlite in the step (2) into the mixer, continuously stirring for 20-25min, and finally, sequentially adding the composite water repellent, the composite coupling agent, the composite rubber powder and the epichlorohydrin graft copolymerization modified bone glue under the stirring condition, and stirring for 65-75 min.
Further, the preparation method of the epichlorohydrin graft copolymerization modified bone glue comprises the following steps:
mixing a bone glue raw material with a mass ratio of 1:1 with magnetized water, fully swelling the bone glue raw material in the magnetized water under the action of ultrasound, dropwise adding a mixed acid solution with a mass fraction of 34-36% under the stirring condition, stirring for 10-15min under the conditions that the rotation speed is 1000-1500r/min and the temperature is 44-48 ℃ after dropwise adding is finished, dropwise adding epoxy chloropropane with the mass equivalent to 10% of the bone glue after stirring is finished, uniformly mixing, and then carrying out radiation graft copolymerization in a 60 Co-gamma ray radiation field, wherein the radiation intensity is 0.2-0.3kGy/h and the radiation dose is 0.8-1.0 kGy.
Further, the preparation method of the cement-based crack grouting material for the road and bridge comprises the following steps of:
step 1: evenly chopping the sepiolite wool into pieces with the lengths of 5mm, 3mm, 1mm, 0.5mm and 0.1mm for later use;
step 2: mixing halloysite clay and xonotlite, grinding to 120 μm, placing the ground material in sodium hypochlorite solution with mass fraction of 1.55%, and performing ultrasonic treatment at 40 deg.C and material-liquid ratio of 1:5 for 90min at frequency of 30KHz and sound intensity of 0.2W/cm2Cooling to room temperature, filtering, washing, drying, roasting at 270 deg.C for 32min, and naturally cooling to 55 deg.C, and keeping the temperature for later use;
and step 3: and (2) firstly adding the composite cement and the composite emulsion into a mixer, mixing and stirring for 7.5min, then adding the pearlife, the short-cut sepiolite wool in the step (1), the halloysite clay and the xonotlite in the step (2) into the mixer, continuously stirring for 22.5min, and finally, sequentially adding the composite water repellent, the composite coupling agent, the composite rubber powder and the epichlorohydrin graft copolymerization modified bone glue under the stirring condition, and stirring for 70 min.
Further, the crack grouting material is prepared from the following raw materials in parts by weight:
84 parts of composite cement;
8 parts of composite emulsion;
12 parts of pearl sand;
10 parts of halloysite clay;
5 parts of sepiolite wool;
4 parts of epoxy chloropropane graft copolymerization modified bone glue;
8 parts of xonotlite;
1.5 parts of a composite water repellent;
2.5 parts of a composite coupling agent;
4 parts of composite rubber powder.
Further, the composite cement is obtained by combining CA-70 aluminate cement and pozzolanic portland cement with the strength grade of 42.5 according to the mass ratio of 1.5: 6.
Further, the composite emulsion is obtained by combining two components of silicone acrylic emulsion and chlorine partial emulsion according to the mass ratio of 2.5: 1.5.
Furthermore, the preparation method of the epichlorohydrin grafted copolymerized modified bone glue comprises the following steps: mixing a bone glue raw material and magnetized water in a mass ratio of 1:1, fully swelling the bone glue raw material in the magnetized water under the action of ultrasound, dropwise adding a mixed acid solution with the mass fraction of 35% under the stirring condition, wherein the mixed acid solution consists of hydrochloric acid with the molar concentration of 5mol/L and citric acid with the molar concentration of 3.5mol/L, stirring for 12.5min at the rotation speed of 1200r/min and the temperature of 46 ℃, dropwise adding epoxy chloropropane with the mass of 10% of the bone glue after stirring, uniformly mixing, and then carrying out radiation graft copolymerization in a 60 Co-gamma ray radiation field, wherein the radiation intensity is 0.25kGy/h, and the radiation dose is 0.9 kGy.
Furthermore, the composite water repellent is obtained by combining two components, namely an SHP-50 type water repellent and Z70 emulsion according to the mass ratio of 2.5: 1.5.
Further, the composite coupling agent is obtained by combining three components of isobutyl triethoxysilane, anti-settling aluminate ASA and lignin coupling agent according to a mass ratio of 4:2: 2.
Further, the compound rubber powder is prepared by mixing wacker latex powder 5044N, JYM-087B type rubber powder according to the mass ratio of 2: 1.5.
The invention has the following beneficial effects:
by exploring and improving the raw materials for producing the crack grouting material and the preparation method thereof, the crack grouting material is prepared by taking CA-70 aluminate cement and pozzolanic silicate cement with the strength grade of 42.5 as base materials, adding pearlife, halloysite clay, sepiolite velvet and fibrous xonotlite as fillers and matching the synergistic interaction of epoxy chloropropane graft copolymerization modified bone glue, emulsion, rubber powder and additives, so that the finally prepared crack grouting material has the following structural characteristics and achieves the following effects: sepiolite flock short fibers with different lengths are distributed in a slurry system in a random manner, and the formed three-dimensional network structure disperses the stress of an internal structure, so that the slurry performance of the slurry is obviously enhanced, and the compressive strength, the splitting tensile strength and the breaking strength of a slurry curing structure are improved; the added epichlorohydrin graft copolymerization modified bone glue can greatly enhance the interface bonding strength of the slurry and improve the bonding performance; in addition, the crack grouting material has the advantages of good fluidity, low shrinkage rate, zero bleeding, long construction operable time, water resistance, freeze-thaw resistance, suitability for crack widths of 2.5-5.0mm, good process performance, strong environmental adaptation, wide application occasions and wide market prospect.
Detailed Description
The following examples are provided to more clearly illustrate the technical solutions of the present invention, and should not be construed as limiting the scope of the present invention.
All the raw materials and the preparation components thereof in the embodiment can be obtained through a public commercial channel;
example 1
The embodiment relates to a cement-based crack grouting material for a road and bridge, which consists of the following raw materials in parts by weight:
76 parts of composite cement;
7 parts of composite emulsion;
10 parts of pearl sand;
8 parts of halloysite clay;
4 parts of sepiolite wool;
3 parts of epichlorohydrin graft copolymerization modified bone glue;
6 parts of xonotlite;
1 part of composite water repellent;
2 parts of a composite coupling agent;
3 parts of composite rubber powder;
the selection and preparation of the composite cement, the composite emulsion, the epichlorohydrin graft copolymerization modified bone glue, the composite water repellent, the composite coupling agent and the composite glue powder in the embodiment are shown in the following table 1:
TABLE 1
The preparation method of the crack grouting material in the embodiment is mainly carried out according to the following steps:
step 1: evenly chopping the sepiolite wool into pieces with the lengths of 5mm, 3mm, 1mm, 0.5mm and 0.1mm for later use;
step 2: mixing halloysite clay and xonotlite, grinding to 100 μm, placing the ground material in sodium hypochlorite solution with mass fraction of 1.35%, and performing ultrasonic treatment at 38 deg.C and material-liquid ratio of 1:5 for 100min with ultrasonic frequency of 25KHz and sound intensity of 0.15W/cm2Cooling to room temperature, filtering, washing, drying, roasting at 260 deg.C for 35min, and naturally cooling to 50 deg.C, and keeping the temperature for later use;
and step 3: and (2) firstly adding the composite cement and the composite emulsion into a mixer, mixing and stirring for 7min, then adding the pearlite sand, the short-cut sepiolite wool in the step (1), the halloysite clay and the xonotlite in the step (2) into the mixer, continuously stirring for 20min, and finally sequentially adding the composite water repellent, the composite coupling agent, the composite rubber powder and the epichlorohydrin graft copolymerization modified bone glue under the stirring condition, and stirring for 65 min.
Example 2
The embodiment relates to a cement-based crack grouting material for a road and bridge, which consists of the following raw materials in parts by weight:
84 parts of composite cement;
8 parts of composite emulsion;
12 parts of pearl sand;
10 parts of halloysite clay;
5 parts of sepiolite wool;
4 parts of epoxy chloropropane graft copolymerization modified bone glue;
8 parts of xonotlite;
1.5 parts of a composite water repellent;
2.5 parts of a composite coupling agent;
4 parts of composite rubber powder;
the selection and preparation of the composite cement, the composite emulsion, the epichlorohydrin graft copolymerization modified bone glue, the composite water repellent, the composite coupling agent and the composite glue powder in the embodiment are shown in the following table 2:
TABLE 2
The preparation method of the crack grouting material in the embodiment is mainly carried out according to the following steps:
step 1: evenly chopping the sepiolite wool into pieces with the lengths of 5mm, 3mm, 1mm, 0.5mm and 0.1mm for later use;
step 2: mixing halloysite clay and xonotlite, grinding to 120 μm, placing the ground material in sodium hypochlorite solution with mass fraction of 1.55%, and performing ultrasonic treatment at 40 deg.C and material-liquid ratio of 1:5 for 90min at frequency of 30KHz and sound intensity of 0.2W/cm2Cooling to room temperature, filtering, washing, drying, roasting at 270 deg.C for 32min, and naturally cooling to 55 deg.C, and keeping the temperature for later use;
and step 3: and (2) firstly adding the composite cement and the composite emulsion into a mixer, mixing and stirring for 7.5min, then adding the pearlife, the short-cut sepiolite wool in the step (1), the halloysite clay and the xonotlite in the step (2) into the mixer, continuously stirring for 22.5min, and finally, sequentially adding the composite water repellent, the composite coupling agent, the composite rubber powder and the epichlorohydrin graft copolymerization modified bone glue under the stirring condition, and stirring for 70 min.
Example 3
The embodiment relates to a cement-based crack grouting material for a road and bridge, which consists of the following raw materials in parts by weight:
92 parts of composite cement;
9 parts of composite emulsion;
15 parts of pearl sand;
12 parts of halloysite clay;
6 parts of sepiolite wool;
5 parts of modified bone glue grafted and copolymerized by epoxy chloropropane;
10 parts of xonotlite;
2 parts of a composite water repellent;
3 parts of a composite coupling agent;
5 parts of composite rubber powder;
the selection and preparation of the composite cement, the composite emulsion, the epichlorohydrin graft-copolymerized modified bone glue, the composite water repellent, the composite coupling agent and the composite glue powder in the embodiment are shown in the following table 3:
TABLE 3
The preparation method of the crack grouting material in the embodiment is mainly carried out according to the following steps:
step 1: evenly chopping the sepiolite wool into pieces with the lengths of 5mm, 3mm, 1mm, 0.5mm and 0.1mm for later use;
step 2: mixing halloysite clay and xonotlite, grinding to 150 μm, placing the ground material in sodium hypochlorite solution with mass fraction of 1.75%, and performing ultrasonic treatment at 42 deg.C and material-liquid ratio of 1:5 for 80min with ultrasonic frequency of 35KHz and sound intensity of 0.25W/cm2Cooling to room temperature, filtering, washing, drying, roasting at 280 deg.C for 30min, and naturally cooling to 60 deg.C, and keeping the temperature for later use;
and step 3: and (2) firstly adding the composite cement and the composite emulsion into a mixer, mixing and stirring for 8min, then adding the pearlite sand, the short-cut sepiolite wool in the step (1), the halloysite clay and the xonotlite in the step (2) into the mixer, continuously stirring for 25min, and finally sequentially adding the composite water repellent, the composite coupling agent, the composite rubber powder and the epichlorohydrin graft copolymerization modified bone glue under the stirring condition, and stirring for 75 min.
Comparative example group
In Table 4 below, "-" indicates reduced use of certain ingredients in the above examples;
TABLE 4
Comparative example 6
This comparative example relates to a crack grouting material which, in comparison with example 3 above, differs only in the following way:
the composite cement is changed into the following components: strength grade 42.5 pozzolanic portland cement single component.
Comparative example 7
This comparative example relates to a crack grouting material which, in comparison with example 3 above, differs only in the following way:
the composite emulsion is changed into the following components: silicone acrylic emulsion is a single component.
Comparative example 8
The comparative example relates to a crack grouting material, which only has different mass ratios of the components in the composite water repellent compared with the crack grouting material in the example 1;
the mass ratio of each component of the composite water repellent in the comparative example is as follows: z70 emulsion as SHP-50 type water repellent is 1: 1.
Comparative example 9
This comparative example relates to a crack grouting material which, in comparison to example 1 above, differs only in the following way:
the composite coupling agent is changed into: silane coupling agent KH 550.
Comparative example 10
The comparative example relates to a crack grouting material, which only has different mass ratios of the components in the composite rubber powder compared with the example 1;
the mass ratio of each component of the composite rubber powder in the comparative example is as follows: tile latex powder 5044N JYM-087B type latex powder is 1: 2.
Comparative example 11
This comparative example relates to a crack grouting material, which differs from the above example 2 only in the method of preparation of the insulation material;
the preparation method of the crack grouting material of the comparative example is as follows:
step 1: chopping sepiolite wool to a length of 1mm for later use;
step 2: the same as example 2;
and step 3: the same as in example 2.
Comparative example 12
This comparative example relates to a crack grouting material, which differs from the above example 2 only in the method of preparation of the insulation material;
the preparation method of the crack grouting material of the comparative example is as follows:
step 1: the same as example 2;
step 2: mixing halloysite clay and xonotlite, and crushing and grinding to 120 mu m;
and step 3: the same as in example 2.
Comparative example 13
This comparative example relates to a crack grouting material, which differs from the above example 2 only in the method of preparation of the insulation material;
the preparation method of the crack grouting material of the comparative example is as follows:
step 1: the same as example 2;
step 2: the same as example 2;
and step 3: and (3) conveying the chopped sepiolite wool obtained in the step (1), the halloysite clay and the xonotlite obtained in the step (2) and all other raw materials into a mixer together and stirring for 100 min.
Comparative example 14
The composite material for self-repairing bridge cracks comprises the following raw materials in parts by weight: 80-100 parts of Portland cement, 1-20 parts of sodium citrate, 12-18 parts of basalt fiber, 4-16 parts of MC120 curing agent powder, 4-18 parts of tetraethylenepentamine curing agent, 20-40 parts of quartz sand, 1-8 parts of sodium benzoate, 10-30 parts of phosphate, 1-5 parts of sulfur, 2-8 parts of lithium oxychloride and 10-20 parts of epoxy resin.
Performance detection
To verify the advantageous effects of the present invention, the crack grouting material samples of examples 1-3 and comparative examples 1-14 were tested for the performance indexes shown in tables 5 and 6 below (the crack grouting materials for the samples of examples 1-3 in tables 5 and 6 are represented by #1- #3, and the crack grouting materials for the samples of comparative examples 1-14 are represented by &1- & 14).
Firstly, the detection conditions of the compressive strength are as follows:
using a specimen of 40 mm. times.40 mm. times.160 mm, the measurement was carried out by the method specified in GB/T17671 at (23. + -. 2). degree.C. and (50. + -. 5)% RH.
Secondly, the detection conditions of the splitting tensile strength are as follows:
test pieces and test methods specified in GB 50728 appendix E were used for the tests.
Thirdly, the detection conditions of the flexural strength are as follows:
the test is carried out by adopting the test piece size and the test method specified in GB 50728 appendix S.
Fourthly, the detection conditions of the steel to the positive tensile bond strength of the C45 concrete are as follows:
the test is carried out by adopting the test piece size and the test method specified in GB 50728 appendix G.
The detection conditions of the fluidity are as follows:
the test piece size and the test method specified in GB/T50448 are adopted for detection.
Sixthly, the detection conditions of the vertical expansion rate are as follows:
the test piece size and the test method specified in GB/T7123 are adopted for detection.
And the detection conditions of the bleeding rate are as follows:
the test pieces are tested by the test method and the test method specified in GB/T50448 and GB/T50119.
The detection conditions of the operable time for measurement at 25 ℃ are as follows:
the test piece size and the test method specified in GB/T50080 are adopted for detection.
Ninthly, the detection conditions of the construction negative temperature action resistance are as follows:
the maintenance conditions and the test method specified in GB/T50448 are adopted for detection.
TABLE 5
TABLE 6
Description of the drawings: (-7+28) shows curing at the specified negative temperature for 7d, then standard curing for 28d, and so on.
Combining tables 5 and 6 above, it can be seen that: the crack grouting material is characterized in that the selection of production raw materials and the preparation method are ingenious, the components, the content and the preparation method of the crack grouting material are taken as an integral scheme to solve the defects of the existing bridge crack grouting material in all aspects of performance, the data analysis in the table shows that the synergistic interaction among the raw material components obviously improves the slurry performance, the bonding performance, the technological performance, the construction negative temperature resistance and other aspects of the finished product crack grouting material, the environmental adaptation is strong, the stress resistance strength is high, the application field and the prospect of the crack grouting material are greatly improved, the urgent requirements of the existing and future markets and the bridge road traffic field on the high-performance crack grouting material can be met, and the social development is promoted.
The choice of components and the choice of amounts of the present invention are not obvious due to the design considerations and the purpose of the present invention, and in no way will be readily apparent to those skilled in the art in view of the prior art. This is further reflected in the preparation method of the crack grouting material of the invention, and as can be seen by combining the embodiment of the invention, the invention adopts the step of adding raw materials in batches instead of the conventional one-time addition (such as comparative example 13) in the prior art, and the process is suitable for the special proportion of the raw material components for producing the crack grouting material of the invention, and the excellent characteristics of the finally prepared crack grouting material can be ensured only by adopting the process.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the cement-based crack grouting material for the road and bridge is characterized by comprising the following steps of:
step 1: weighing the following raw materials in parts by weight: 76-92 parts of composite cement, 7-9 parts of composite emulsion, 10-15 parts of pearlite sand, 8-12 parts of halloysite clay, 4-6 parts of sepiolite velvet, 3-5 parts of epichlorohydrin graft copolymerization modified bone glue, 6-10 parts of xonotlite, 1-2 parts of composite water repellent, 2-3 parts of composite coupling agent and 3-5 parts of composite rubber powder;
evenly chopping the sepiolite wool into pieces with the lengths of 5mm, 3mm, 1mm, 0.5mm and 0.1mm for later use;
step 2: mixing halloysite clay and xonotlite, crushing and grinding to 100-150 mu m, placing the ground material in sodium hypochlorite solution with the mass fraction of 1.35-1.75%, and carrying out ultrasonic treatment for 80-100min at the temperature of 38-42 ℃ and the material-liquid ratio of 1:5, wherein the frequency of ultrasonic waves is 25-35KHz, and the sound intensity is 0.15-0.25W/cm2Cooling to room temperature, filtering, washing, drying, roasting at 280 deg.C for 30-35min at 260 deg.C, and naturally cooling to 50-60 deg.C, and keeping the temperature for later use;
and step 3: and (2) firstly adding the composite cement and the composite emulsion into a mixer, mixing and stirring for 7-8min, then adding the pearlife, the short-cut sepiolite wool in the step (1), the halloysite clay and the xonotlite in the step (2) into the mixer, continuously stirring for 20-25min, and finally, sequentially adding the composite water repellent, the composite coupling agent, the composite rubber powder and the epichlorohydrin graft copolymerization modified bone glue under the stirring condition, and stirring for 65-75 min.
2. The preparation method of the cement-based crack grouting material for the road and bridge according to claim 1, characterized in that the preparation method of the epichlorohydrin graft copolymerization modified bone cement comprises the following steps:
mixing a bone glue raw material with a mass ratio of 1:1 with magnetized water, fully swelling the bone glue raw material in the magnetized water under the action of ultrasound, dropwise adding a mixed acid solution with a mass fraction of 34-36% under the stirring condition, stirring for 10-15min under the conditions that the rotation speed is 1000-1500r/min and the temperature is 44-48 ℃ after dropwise adding is finished, dropwise adding epoxy chloropropane with the mass equivalent to 10% of the bone glue after stirring is finished, uniformly mixing, and then carrying out radiation graft copolymerization in a 60 Co-gamma ray radiation field, wherein the radiation intensity is 0.2-0.3kGy/h and the radiation dose is 0.8-1.0 kGy.
3. The method for preparing the cement-based crack grouting material for the road and bridge according to claim 1, which is characterized by comprising the following steps:
step 1: evenly chopping the sepiolite wool into pieces with the lengths of 5mm, 3mm, 1mm, 0.5mm and 0.1mm for later use;
step 2: mixing halloysite clay and xonotlite, grinding to 120 μm, placing the ground material in sodium hypochlorite solution with mass fraction of 1.55%, and performing ultrasonic treatment at 40 deg.C and material-liquid ratio of 1:5 for 90min at frequency of 30KHz and sound intensity of 0.2W/cm2Cooling to room temperature, filtering, washing, drying, roasting at 270 deg.C for 32min, and naturally cooling to 55 deg.C, and keeping the temperature for later use;
and step 3: and (2) firstly adding the composite cement and the composite emulsion into a mixer, mixing and stirring for 7.5min, then adding the pearlife, the short-cut sepiolite wool in the step (1), the halloysite clay and the xonotlite in the step (2) into the mixer, continuously stirring for 22.5min, and finally, sequentially adding the composite water repellent, the composite coupling agent, the composite rubber powder and the epichlorohydrin graft copolymerization modified bone glue under the stirring condition, and stirring for 70 min.
4. The preparation method of the cement-based crack grouting material for the road and bridge as claimed in claim 3, wherein the crack grouting material is prepared from the following raw materials in parts by weight:
84 parts of composite cement;
8 parts of composite emulsion;
12 parts of pearl sand;
10 parts of halloysite clay;
5 parts of sepiolite wool;
4 parts of epoxy chloropropane graft copolymerization modified bone glue;
8 parts of xonotlite;
1.5 parts of a composite water repellent;
2.5 parts of a composite coupling agent;
4 parts of composite rubber powder.
5. The method for preparing the cement-based crack grouting material for the road and bridge as claimed in claim 4, wherein the composite cement is CA-70 aluminate cement and 42.5-strength-grade pozzolanic silicate cement which are combined according to a mass ratio of 1.5: 6.
6. The method for preparing the cement-based crack grouting material for the road and bridge as claimed in claim 5, wherein the composite emulsion is obtained by combining two components of a silicone-acrylic emulsion and a chlorine-meta emulsion according to a mass ratio of 2.5: 1.5.
7. The preparation method of the cement-based crack grouting material for the road and bridge according to claim 6, characterized in that the preparation method of the epichlorohydrin graft copolymerization modified bone cement comprises the following steps: mixing a bone glue raw material and magnetized water in a mass ratio of 1:1, fully swelling the bone glue raw material in the magnetized water under the action of ultrasound, dropwise adding a mixed acid solution with the mass fraction of 35% under the stirring condition, wherein the mixed acid solution consists of hydrochloric acid with the molar concentration of 5mol/L and citric acid with the molar concentration of 3.5mol/L, stirring for 12.5min at the rotation speed of 1200r/min and the temperature of 46 ℃, dropwise adding epoxy chloropropane with the mass of 10% of the bone glue after stirring, uniformly mixing, and then carrying out radiation graft copolymerization in a 60 Co-gamma ray radiation field, wherein the radiation intensity is 0.25kGy/h, and the radiation dose is 0.9 kGy.
8. The method for preparing the cement-based crack grouting material for the road and bridge as claimed in claim 7, wherein the composite water repellent is obtained by combining two components of an SHP-50 type water repellent and a Z70 emulsion according to a mass ratio of 2.5: 1.5.
9. The preparation method of the cement-based crack grouting material for the road and bridge as claimed in claim 8, wherein the composite coupling agent is obtained by combining three components of isobutyl triethoxysilane, anti-settling aluminate ASA and lignin coupling agent according to a mass ratio of 4:2: 2.
10. The method for preparing the cement-based crack grouting material for the road and bridge as claimed in claim 9, wherein the composite rubber powder is prepared by mixing tile latex powder 5044N, JYM-087B type rubber powder according to a mass ratio of 2: 1.5.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050105086A (en) * | 2004-04-30 | 2005-11-03 | 곽상운 | Foaming chemical grout |
| CN109279849A (en) * | 2018-10-25 | 2019-01-29 | 合肥慧林建材有限公司 | A kind of preparation method of road and bridge cement base crack grout material |
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2020
- 2020-06-10 CN CN202010523719.9A patent/CN111646759A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050105086A (en) * | 2004-04-30 | 2005-11-03 | 곽상운 | Foaming chemical grout |
| CN109279849A (en) * | 2018-10-25 | 2019-01-29 | 合肥慧林建材有限公司 | A kind of preparation method of road and bridge cement base crack grout material |
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Application publication date: 20200911 |