CN104313969A - Construction method of magnesium oxychloride cement concrete pavement - Google Patents
Construction method of magnesium oxychloride cement concrete pavement Download PDFInfo
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- CN104313969A CN104313969A CN201410544656.XA CN201410544656A CN104313969A CN 104313969 A CN104313969 A CN 104313969A CN 201410544656 A CN201410544656 A CN 201410544656A CN 104313969 A CN104313969 A CN 104313969A
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
-
- 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
- C04B28/30—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 magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- 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
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/06—Methods of making joints
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/147—Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering
-
- 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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Repair (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a construction method of a magnesium oxychloride cement concrete pavement. The magnesium oxychloride cement concrete is used as a pavement construction material, so that the application range of the magnesium oxychloride cement is enlarged; meanwhile, by utilizing the method, the water resistance of a magnesium oxychloride cement product is improved, the bending tensile strength of the concrete of the magnesium oxychloride cement concrete pavement is more than 6MPa in 7 days, the pressure resistance is more than 40MPa, the performances such as bending resistance, duration, impact resistance and the like can be improved, the performances such as deformation, moisture absorption and halogenation is lowered, the construction process is simple, and the pressure resistance of the pavement is high.
Description
Technical field
The present invention relates to a kind of construction method, be specifically related to a kind of construction method of magnesia oxychloride cement rigid pavement.
Background technology
Magnesia oxychloride cement has lot of advantages, as light in quality, condensation hard fast, intensity is high, do not burn.Magnesia oxychloride cement (Magnesium Oxychloride Cement is called for short MOC) is by light calcined magnesia (MgO) and solidifies blender magnesium chloride (MgCl
2), water (H
2o) a kind of early-strong-fast-hard air hardening cementitious materials of being prepared from of mix according to a certain percentage.Different from traditional silicate cement hydration process, magnesium cement is a kind of early-strong-fast-hard air hardening cementitious materials, do not need moist maintenance, have that cryogenic temperature condensation is fast, binding strength is high, drying shrinkage is little, the corrosion of abrasion resistance, salt tolerant and the advantage such as frost resistance is good, and magnesia oxychloride cement all has stability in megathermal climate and harsh climate, its stability can not be affected because of the change of weather.
Meanwhile, the distribution of salt lake, western China is numerous, has the magnesia development of resources history in long salt lake, wherein flourishing with potash fertilizer industry.The potassium waste material that causes a large amount of content of magnesium chloride too much is extracted in Qinghai Salt Lake area, even causes " magnesium evil ", and only just by-product 7,680 ten thousand tons of old halogen in 2010, amount to more than 2,640 ten thousand tons, magnesium chloride, severe contamination surrounding enviroment.Therefore, the magnesium chloride waste material adopting production potash fertilizer to cause produces magnesium cement as main raw material(s), Portland cement is replaced to be applied in pavement concrete material, not only significantly improve the durability of road concrete material, can also " refuse " local use, solve problem of environmental pollution, reduce road concrete material cost of production.
Summary of the invention
For solving the problem, the invention provides a kind of construction method of magnesia oxychloride cement rigid pavement.
For achieving the above object, the technical scheme that the present invention takes is:
A construction method for magnesia oxychloride cement rigid pavement, comprises the steps:
The preparation of S1, material and service check thereof;
S2, to be detected by Falling Weight Deflectometer and to determine joint slab ability and deflection value, joint slab coefficient be less than 40% and or design load 100kN time the deflection value unstable road slab that is greater than 0.89mm need to repair it, all crowded broken, protuberance, hollowing basic units should remove, and use plain concrete heavily to spread, establish expansion joint plate to be spaced laterally apart, expansion joint plate should stitch consistency from top to bottom with road surface expansion joint (E.J.) with contracting simultaneously;
S3, after sub-surface acceptance(check), carry out construction lofting work, 20 meters one, every section, straight line, curved section every 4 meters one (same with template length), will establish expansion joint (E.J.) simultaneously, contracting seam, the Center stakes such as cone slope turning point, and correspondingly respectively establish skirt piles in roadside, according to the center line put well and skirt piles, check the concrete piecemeal line of working drawing at the scene, for curved section, horizontal piecemeal line must be kept vertical with Lu Zhizheng line;
S4, installation form, template must have enough strength and stiffness, template should be installed firm, straight, smooth, distortionless, adjacent forms connects should be closely smooth-going, must not have spillage, the phenomenons such as the wrong stubble in front and back, height faulting of slab ends, template should be able to ensure to pave, jolt ramming, levelling means load is advanced, shock and vibration are not shifted, Horizontal Curve Sections adopts short template, and the stressed drill rod of drill rod and outside is fixed in inner side all must not higher than template, in order to walking beam by;
After S5, model sheetinstallat, after qualified after testing, after model sheetinstallat, after qualified after testing, get 100 parts of light calcined magnesias and add 12.5-16.6 part magnesium chloride hexahydrate, 0.15-0.3 part powdery polycarboxylic acid high efficiency water reducing agent, 0.3-0.6 part sublimed salicylic acid, 0.27-0.54 part ferrous sulfate heptahydrate, 0.27-0.54 part magnesium sulfate, 0.09-0.18 part polypropene staple, 0.235-0.69 part II level flyash, mixing time 3-5 minute, then add appropriate air entraining agent, build;
Under S6, natural conditions, maintenance is after 6 hours, form removal.
S7, leveling facing, the whole seam in clear limit, remove mucilage, repair and lack limit, arrisdefect, until concrete crushing strength reach 40% after can carry out hard cutting, and should complete in two weeks, texture should be consistent with transverse joint direction, the wide 3mm of texture, dark 4mm, spacing is 15-25mm, random alignment
As preferably, described concrete speading thickness need reserve height, and the coefficient of loose laying of mixture controls between K=1.1-1.25, expects partially dry, gets high value; Otherwise, get lower value; For the part of corner, first should vibrate in order with poker vibrator, then shake with the crisscross holder of vibration board; The duration that vibrator vibrates in each position, stop sinking, no longer emitting bubble and glow cement mortar and be as the criterion with mixture, and should not cross and shake; When vibrating, artificial feed supplement should be aided with, the displacement of jolt ramming effect, template, pull bar, dowel bar and reinforcing bar, distortion should be checked at any time, loosen, the situation such as spillage, and to correct in time.
Wherein, in chloro-magnesium cement, contain a large amount of chlorions, therefore need to carry out preservative treatment to equipment Metal Contact face in construction, clean in time after construction simultaneously and prevent equipment corrosion.(such as, the mixing equipment, haulage device, laying equipment etc. of mixing building), need to carry out preservative treatment to concrete pavement dowel, longitudinal joint bar etc. simultaneously, magnesia oxychloride cement concrete raw material material is required to carry out precise in strict accordance with coordination in works, adopts election weighing system to ensure the accuracy weighed.Light calcined magnesia, water repellent agent, sand and rubble are added by feeding chamber respectively, should according to the cohesiveness of mixture, homogenieity and strength stability trial mix determination Optimum Mixing Time.In stirring construction, bittern is finally joined agitated kettle from regulating reservoir by dedicated pump.In order to make bittern, light calcined magnesia, water repellent agent fully react, mixing time comparatively conventional concrete mixing time increases 30s.
Magnesium cement is strong due to morning, the characteristic of fast solidifying, the slump of engine request is 10-40mm, so consider the loss problem of the slump on road, the machine slump that goes out of test section is about 50-80mm, according to result of the test and field observation, magnesia oxychloride cement concrete, completes no more than 1h to making to the transport complete time no more than 42min.After transport every day, need to carry out cleaning 2-3 time to cask.
Cloth and spreading speed adapt.When concrete batching system cloth length is greater than 10m, start operation of vibrating.When interval inserts jolt ramming, each displacement is no more than 1.5 times of vibrating spear useful effect radius, and is not more than 500mm, and vibrating time is 15-30s.After panel jolt ramming, immediately tension bars of longitudinal joints is installed.Containing a large amount of chlorions in magnesia oxychloride cement, its content is more than 30 times in Portland cement.Chlorion has very strong corrosivity to reinforcing bar, greatly reduces bearing capacity and the plasticity of reinforcing bar.Therefore, need to carry out corrosion-inhibiting coating process to pull bar, dowel bar etc. before seam construction.Three roll shaft eveners, in an operation unit length, adopt vibration of advancing, retreat and quietly roll mode operation, respectively roll extrusion 2-3 time.Finisher wipe one's face operation latest time earlier than regulation the complete permission maximum duration 1h of making.
Form removal is carried out when the relevant specification that concrete strength reaches design strength requires, because early strength is higher, magnesium cement concrete striking time is short compared with cement concrete, according to result of the test and site operation situation, general when fine, it is collapsible die that magnesia oxychloride cement concrete is greater than 6 hours.
Start health immediately after magnesia oxychloride cement laying of roadway completes, magnesia oxychloride cement rigid pavement can adopt the method (part) of nature or membrance curing to carry out maintenance.
After constructing complete 4 days, (reaching traditional concrete pavement intensity) gets final product open to traffic.
The present invention has following beneficial effect:
The present invention uses magnesia oxychloride cement concrete as the material of pavement construction, expand the application surface of magnesia oxychloride cement, apply this method to carry out constructing and improve the water resistance of magnesium oxychloride cement product simultaneously, magnesia oxychloride cement pavement concrete 7 days bending tensile strengths are at more than 6MPa, more than compressive strength 40MPa, anti-folding, durability, resistance to impact, etc. performance increase, the performances such as distortion, damp suction surface halide accumulation reduce, and construction technology is simple, and gained road surface compressive resistance is high.
Detailed description of the invention
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
A construction method for magnesia oxychloride cement rigid pavement, comprises the steps:
The preparation of S1, material and service check thereof;
S2, to be detected by Falling Weight Deflectometer and to determine joint slab ability and deflection value, joint slab coefficient be less than 40% and or design load 100kN time the deflection value unstable road slab that is greater than 0.89mm need to repair it, all crowded broken, protuberance, hollowing basic units should remove, and use plain concrete heavily to spread, establish expansion joint plate to be spaced laterally apart, expansion joint plate should stitch consistency from top to bottom with road surface expansion joint (E.J.) with contracting simultaneously;
S3, after sub-surface acceptance(check), carry out construction lofting work, 20 meters one, every section, straight line, curved section every 4 meters one (same with template length), will establish expansion joint (E.J.) simultaneously, contracting seam, the Center stakes such as cone slope turning point, and correspondingly respectively establish skirt piles in roadside, according to the center line put well and skirt piles, check the concrete piecemeal line of working drawing at the scene, for curved section, horizontal piecemeal line must be kept vertical with Lu Zhizheng line;
S4, installation form, template must have enough strength and stiffness, template should be installed firm, straight, smooth, distortionless, adjacent forms connects should be closely smooth-going, must not have spillage, the phenomenons such as the wrong stubble in front and back, height faulting of slab ends, template should be able to ensure to pave, jolt ramming, levelling means load is advanced, shock and vibration are not shifted, Horizontal Curve Sections adopts short template, and the stressed drill rod of drill rod and outside is fixed in inner side all must not higher than template, in order to walking beam by;
After S5, model sheetinstallat, after qualified after testing, get 100 parts of light calcined magnesias and add 12.5 parts of magnesium chloride hexahydrates, 0.15 part of powdery polycarboxylic acid high efficiency water reducing agent, 0.3 part of sublimed salicylic acid, 0.27 part of ferrous sulfate heptahydrate, 0.27 part of magnesium sulfate, 0.09 part of polypropene staple, 0.345 part of II level flyash, mixing time 5 minutes, then adds appropriate air entraining agent, builds; Described concrete speading thickness need reserve height, and the coefficient of loose laying of mixture controls between K=1.1-1.25, expects partially dry, gets high value; Otherwise, get lower value; For the part of corner, first should vibrate in order with poker vibrator, then shake with the crisscross holder of vibration board; The duration that vibrator vibrates in each position, stop sinking, no longer emitting bubble and glow cement mortar and be as the criterion with mixture, and should not cross and shake; When vibrating, artificial feed supplement should be aided with, the displacement of jolt ramming effect, template, pull bar, dowel bar and reinforcing bar, distortion should be checked at any time, loosen, the situation such as spillage, and to correct in time;
Under S6, natural conditions, maintenance is after 6 hours, form removal.
S7, leveling facing, the whole seam in clear limit, remove mucilage, repair and lack limit, arrisdefect, until concrete crushing strength reach 40% after can carry out hard cutting, and should complete in two weeks, texture should be consistent with transverse joint direction, the wide 3mm of texture, dark 4mm, spacing is 15mm, random alignment
Embodiment 2
A construction method for magnesia oxychloride cement rigid pavement, comprises the steps:
The preparation of S1, material and service check thereof;
S2, to be detected by Falling Weight Deflectometer and to determine joint slab ability and deflection value, joint slab coefficient be less than 40% and or design load 100kN time the deflection value unstable road slab that is greater than 0.89mm need to repair it, all crowded broken, protuberance, hollowing basic units should remove, and use plain concrete heavily to spread, establish expansion joint plate to be spaced laterally apart, expansion joint plate should stitch consistency from top to bottom with road surface expansion joint (E.J.) with contracting simultaneously;
S3, after sub-surface acceptance(check), carry out construction lofting work, 20 meters one, every section, straight line, curved section every 4 meters one (same with template length), will establish expansion joint (E.J.) simultaneously, contracting seam, the Center stakes such as cone slope turning point, and correspondingly respectively establish skirt piles in roadside, according to the center line put well and skirt piles, check the concrete piecemeal line of working drawing at the scene, for curved section, horizontal piecemeal line must be kept vertical with Lu Zhizheng line;
S4, installation form, template must have enough strength and stiffness, template should be installed firm, straight, smooth, distortionless, adjacent forms connects should be closely smooth-going, must not have spillage, the phenomenons such as the wrong stubble in front and back, height faulting of slab ends, template should be able to ensure to pave, jolt ramming, levelling means load is advanced, shock and vibration are not shifted, Horizontal Curve Sections adopts short template, and the stressed drill rod of drill rod and outside is fixed in inner side all must not higher than template, in order to walking beam by;
After S5, model sheetinstallat, after qualified after testing, get 100 parts of light calcined magnesias and add 16.6 parts of magnesium chloride hexahydrates, 0.3 part of powdery polycarboxylic acid high efficiency water reducing agent, 0.6 part of sublimed salicylic acid, 0.54 part of ferrous sulfate heptahydrate, 0.54 part of magnesium sulfate, 0.18 part of polypropene staple, 0.69 part of II level flyash, mixing time 3 minutes, then adds appropriate air entraining agent, builds; Described concrete speading thickness need reserve height, and the coefficient of loose laying of mixture controls between K=1.1-1.25, expects partially dry, gets high value; Otherwise, get lower value; For the part of corner, first should vibrate in order with poker vibrator, then shake with the crisscross holder of vibration board; The duration that vibrator vibrates in each position, stop sinking, no longer emitting bubble and glow cement mortar and be as the criterion with mixture, and should not cross and shake; When vibrating, artificial feed supplement should be aided with, the displacement of jolt ramming effect, template, pull bar, dowel bar and reinforcing bar, distortion should be checked at any time, loosen, the situation such as spillage, and to correct in time;
Under S6, natural conditions, maintenance is after 6 hours, form removal.
S7, leveling facing, the whole seam in clear limit, remove mucilage, repair and lack limit, arrisdefect, until concrete crushing strength reach 40% after can carry out hard cutting, and should complete in two weeks, texture should be consistent with transverse joint direction, the wide 3mm of texture, dark 4mm, spacing is 25mm, random alignment.
Embodiment 3
A construction method for magnesia oxychloride cement rigid pavement, comprises the steps:
The preparation of S1, material and service check thereof;
S2, to be detected by Falling Weight Deflectometer and to determine joint slab ability and deflection value, joint slab coefficient be less than 40% and or design load 100kN time the deflection value unstable road slab that is greater than 0.89mm need to repair it, all crowded broken, protuberance, hollowing basic units should remove, and use plain concrete heavily to spread, establish expansion joint plate to be spaced laterally apart, expansion joint plate should stitch consistency from top to bottom with road surface expansion joint (E.J.) with contracting simultaneously;
S3, after sub-surface acceptance(check), carry out construction lofting work, 20 meters one, every section, straight line, curved section every 4 meters one (same with template length), will establish expansion joint (E.J.) simultaneously, contracting seam, the Center stakes such as cone slope turning point, and correspondingly respectively establish skirt piles in roadside, according to the center line put well and skirt piles, check the concrete piecemeal line of working drawing at the scene, for curved section, horizontal piecemeal line must be kept vertical with Lu Zhizheng line;
S4, installation form, template must have enough strength and stiffness, template should be installed firm, straight, smooth, distortionless, adjacent forms connects should be closely smooth-going, must not have spillage, the phenomenons such as the wrong stubble in front and back, height faulting of slab ends, template should be able to ensure to pave, jolt ramming, levelling means load is advanced, shock and vibration are not shifted, Horizontal Curve Sections adopts short template, and the stressed drill rod of drill rod and outside is fixed in inner side all must not higher than template, in order to walking beam by;
After S5, model sheetinstallat, after qualified after testing, get 100 parts of light calcined magnesias and add 14.55 parts of magnesium chloride hexahydrates, 0.225 part of powdery polycarboxylic acid high efficiency water reducing agent, 0.45 part of sublimed salicylic acid, 0.405 part of ferrous sulfate heptahydrate, 0.405 part of magnesium sulfate, 0.135 part of polypropene staple, 0.3675 part of II level flyash, mixing time 4 minutes, then adds appropriate air entraining agent, builds; Described concrete speading thickness need reserve height, and the coefficient of loose laying of mixture controls between K=1.1-1.25, expects partially dry, gets high value; Otherwise, get lower value; For the part of corner, first should vibrate in order with poker vibrator, then shake with the crisscross holder of vibration board; The duration that vibrator vibrates in each position, stop sinking, no longer emitting bubble and glow cement mortar and be as the criterion with mixture, and should not cross and shake; When vibrating, artificial feed supplement should be aided with, the displacement of jolt ramming effect, template, pull bar, dowel bar and reinforcing bar, distortion should be checked at any time, loosen, the situation such as spillage, and to correct in time;
Under S6, natural conditions, maintenance is after 6 hours, form removal.
S7, leveling facing, the whole seam in clear limit, remove mucilage, repair and lack limit, arrisdefect, until concrete crushing strength reach 40% after can carry out hard cutting, and should complete in two weeks, texture should be consistent with transverse joint direction, the wide 3mm of texture, dark 4mm, spacing is 20mm, random alignment.
After testing, embodiment 1-3 improves the water resistance of magnesium oxychloride cement product, magnesia oxychloride cement pavement concrete 7 days bending tensile strengths are at more than 6MPa, more than compressive strength 40MPa, anti-folding, durability, resistance to impact, etc. performance increase, the performances such as distortion, damp suction surface halide accumulation reduce, construction technology is simple, and gained road surface compressive resistance is high.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. a construction method for magnesia oxychloride cement rigid pavement, is characterized in that, comprises the steps:
The preparation of S1, material and service check thereof;
S2, to be detected by Falling Weight Deflectometer and to determine joint slab ability and deflection value, joint slab coefficient be less than 40% and or design load 100kN time the deflection value unstable road slab that is greater than 0.89mm need to repair it, all crowded broken, protuberance, hollowing basic units should remove, and use plain concrete heavily to spread, establish expansion joint plate to be spaced laterally apart, expansion joint plate should stitch consistency from top to bottom with road surface expansion joint (E.J.) with contracting simultaneously;
S3, after sub-surface acceptance(check), carry out construction lofting work, 20 meters one, every section, straight line, curved section every 4 meters one, will establish expansion joint (E.J.) simultaneously, contracting seam, the Center stakes such as cone slope turning point, and correspondingly respectively establish skirt piles in roadside, according to the center line put well and skirt piles, check the concrete piecemeal line of working drawing at the scene, for curved section, horizontal piecemeal line must be kept vertical with Lu Zhizheng line;
S4, installation form, template must have enough strength and stiffness, template should be installed firm, straight, smooth, distortionless, adjacent forms connects should be closely smooth-going, must not have spillage, the phenomenons such as the wrong stubble in front and back, height faulting of slab ends, template should be able to ensure to pave, jolt ramming, levelling means load is advanced, shock and vibration are not shifted, Horizontal Curve Sections adopts short template, and the stressed drill rod of drill rod and outside is fixed in inner side all must not higher than template, in order to walking beam by;
After S5, model sheetinstallat, after qualified after testing, get 100 parts of light calcined magnesias and add 12.5-16.6 part magnesium chloride hexahydrate, 0.15-0.3 part powdery polycarboxylic acid high efficiency water reducing agent, 0.3-0.6 part sublimed salicylic acid, 0.27-0.54 part ferrous sulfate heptahydrate, 0.27-0.54 part magnesium sulfate, 0.00-0.18 part polypropene staple, 0.235-0.69 part II level flyash, mixing time 3-5 minute, then add appropriate air entraining agent, build;
Under S6, natural conditions, maintenance is after 6 hours, form removal.
S7, leveling facing, the whole seam in clear limit, remove mucilage, repair and lack limit, arrisdefect, until concrete crushing strength reach 40% after can carry out hard cutting, and should complete in two weeks, texture should be consistent with transverse joint direction, the wide 3mm of texture, dark 4mm, spacing is 15-25mm, random alignment.
2. the construction method of a kind of magnesia oxychloride cement rigid pavement according to claim 1, is characterized in that, described concrete speading thickness need reserve height, and the coefficient of loose laying of mixture controls between K=1.1-1.25, expects partially dry, gets high value; Otherwise, get lower value; For the part of corner, first should vibrate in order with poker vibrator, then shake with the crisscross holder of vibration board; The duration that vibrator vibrates in each position, stop sinking, no longer emitting bubble and glow cement mortar and be as the criterion with mixture, and should not cross and shake; When vibrating, artificial feed supplement should be aided with, the displacement of jolt ramming effect, template, pull bar, dowel bar and reinforcing bar, distortion should be checked at any time, loosen, the situation such as spillage, and to correct in time.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107512897A (en) * | 2017-08-28 | 2017-12-26 | 青海盐湖工业股份有限公司 | A kind of bittern concrete, preparation method and construction method |
| CN107673727A (en) * | 2017-09-21 | 2018-02-09 | 同济大学 | A kind of fiber reinforced magnesium oxychloride cement-base concrete and its preparation |
| CN110615658A (en) * | 2019-10-25 | 2019-12-27 | 东营新基业建筑材料有限公司 | Composite ash for paving roadbed |
| CN113563806A (en) * | 2021-08-09 | 2021-10-29 | 浙江大学 | Inorganic magnesium-based adhesive for bonding and grouting fractured stone cultural relics and preparation method thereof |
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| EP0454660A1 (en) * | 1990-04-23 | 1991-10-30 | MAGINDAG Steirische Magnesit-Industrie Aktiengesellschaft | Waterproof and abrasionproof Sorelcement composition for floors and process for the production of such floors |
| CN1310266A (en) * | 2000-12-27 | 2001-08-29 | 余永吉 | Paving method of anti-slip pervious cement concrete road surface |
| CN1539783A (en) * | 2003-04-26 | 2004-10-27 | 王克通 | Pavement and bricks of wall body made from domestic waste and producing method |
| CN101082199A (en) * | 2007-07-05 | 2007-12-05 | 吴永芳 | Road surface structure and construction method therefor |
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| CN107673727A (en) * | 2017-09-21 | 2018-02-09 | 同济大学 | A kind of fiber reinforced magnesium oxychloride cement-base concrete and its preparation |
| CN110615658A (en) * | 2019-10-25 | 2019-12-27 | 东营新基业建筑材料有限公司 | Composite ash for paving roadbed |
| CN113563806A (en) * | 2021-08-09 | 2021-10-29 | 浙江大学 | Inorganic magnesium-based adhesive for bonding and grouting fractured stone cultural relics and preparation method thereof |
| CN113563806B (en) * | 2021-08-09 | 2022-04-12 | 浙江大学 | Inorganic magnesium-based adhesive for bonding and grouting fractured stone cultural relics and preparation method thereof |
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| CN104313969B (en) | 2016-12-21 |
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