CN109400072A - A kind of anti-crack and anti-seepage type bridge hinge seam concrete and its construction method - Google Patents
A kind of anti-crack and anti-seepage type bridge hinge seam concrete and its construction method Download PDFInfo
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- CN109400072A CN109400072A CN201811510231.1A CN201811510231A CN109400072A CN 109400072 A CN109400072 A CN 109400072A CN 201811510231 A CN201811510231 A CN 201811510231A CN 109400072 A CN109400072 A CN 109400072A
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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
- C04B28/04—Portland 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
Abstract
The invention discloses a kind of anti-crack and anti-seepage type bridges to cut with scissors seam concrete and its construction method, it is made of llowing group of materials: 480 ~ 540 parts of cement, 680 ~ 740 parts of sand, 920 ~ 1000 parts of stone, 160 ~ 185 parts of water, 38 ~ 50 parts of silicon ash, 4 ~ 6 parts of water-reducing agent, 25 ~ 32 parts of swelling agent, basalt fibre volume is the 0.08% ~ 0.22% of volume of concrete, and polypropylene fiber is the 0.08% ~ 0.22% of volume of concrete.The concrete and its construction method can enhance the cracking resistance and anti-permeability performance of hinge seam concrete, play the role of anti-crack and anti-seepage, can ensure bridge structure safe, extend its Years Of Service, have a extensive future.
Description
Technical field
The present invention relates to bridges to cut with scissors seam concrete field, and in particular to a kind of anti-crack and anti-seepage type bridge hinge seam concrete and its
Construction method.
Background technique
In highway in China and urban road, for assemble type concrete slab beam bridge because clear with stress, structure is simple, self weight
It is less conveniently widely used with installation, becomes one of widely used bridge type in Mid and minor spans concrete-bridge.With
The long lasting effect of traffic loading, concrete core slab is also easy to produce hinge and stitches relevant various diseases, hollow under Driving Loading
Plate hinge seam concrete is gradually mutually separated with plate-girder, and rainwater penetrates into and corrosion concrete, causes plate-girder to be corroded, reduces structure
Durability；With the aggravation of disease, cored slab hinge seam concrete occurs to squeeze mill, cracking, locally even whole hinge seam concrete hair
Life falls off.Bridge deck pavement along cored slab hinge seam longitudinal crack development to a certain extent when, cored slab hinge sew on it is rectangular at
One crushed zone.Water-proof concrete layer after cracking cannot prevent rainwater, snow-broth from leaking downwards, when the ponding on bridge floor cannot obtain
Board bottom is penetrated into when smooth excretion, ponding will be stitched by broken hinge, leaves apparent infiltration trace.Hinge seam is destroyed short
Influence in phase to bridge is not very obvious, but generally in four or five Nian Yihou that complete, the disease for cutting with scissors seam will be showed gradually,
Influence the globality of bridge structure.
Once Hollow Slab Beam Bridge hinge seam disease appearance, except cause plate-girder itself destroy in addition to, it is also possible to cause deck paving,
The destruction of telescopic device etc., makes that continuous slab-deck reduces or even bridge deck pavement appearance crack, gathered around, being crushed, removing etc. and showing
As.This has not only severely impacted the comfort of driving, increases the security risk of driving, is also greatly reduced being applicable in for bridge
Property and travel safety.Hinge seam concrete construction quality is the main reason for assembly concrete cored slab hinge seam disease generates,
Assemble type concrete slab hinge gap space is narrow, and concrete vibrating is difficult, it is difficult to closely knit.The inspection opened by hinge seam coagulation soil scene
From the point of view of situation, the aggregate of overwhelming majority hinge seam concrete is uneven, and cement slurry is less between aggregate.Concrete slab is using shallow
Hinge, because the width of hinge seam lower part is theoretically only 10mm, therefore general concrete can not pour into hinge seam in site operation, more
Be far from being concrete vibrating.In hinge seam concrete construction, fails to take measures effectively to close hinge seam lower surface, pour
Cement slurry in hinge seam concrete is lost.After hinge seam concreting, health is difficult or fails timely health, and hinge seam concrete is received
Draw seam is more, and fracture width is big.
Summary of the invention
For hinge of the existing technology stitch disease, the invention proposes a kind of anti-crack and anti-seepage type bridge cut with scissors seam concrete and
Its construction method, it is intended to which the effect of enhancing hinge seam anti-crack and anti-leakage of concrete, the synthesis for promoting concrete hollow slab girder bridge hinge seam make
With performance, ensures bridge structure safe, extend its Years Of Service.
The object of the present invention is achieved like this:
A kind of anti-crack and anti-seepage type bridge hinge seam concrete, the concrete is by cement, sand, stone, water, silicon ash, diminishing
Agent, swelling agent, basalt fibre, polypropylene fibre composition；Wherein, 480 ~ 540 parts by weight of cement, 680 ~ 740 parts by weight of sand,
920 ~ 1000 parts by weight of stone, 160 ~ 185 parts by weight of water, 38 ~ 50 parts by weight of silicon ash, 4 ~ 6 parts by weight of water-reducing agent, swelling agent 25 ~
32 parts by weight, basalt fibre volume are the 0.08% ~ 0.22% of volume of concrete, and polypropylene fiber is volume of concrete
0.08%~0.22%。
Further, the stone is limestone gravel or basaltic broken stone, gradation claimed range are as follows: 0.075mm
The corresponding quality percent of pass of sieve pore is that the corresponding quality percent of pass of 0% ~ 3%, 2.36mm sieve pore is 0% ~ 8%, 4.75mm sieve pore
Corresponding quality percent of pass is that the corresponding quality percent of pass of 8% ~ 16%, 9.5mm sieve pore is that 24% ~ 38%, 19mm sieve pore is corresponding
Quality percent of pass be the corresponding quality percent of pass of 52% ~ 68%, 26.5mm sieve pore be that 75% ~ 88%, 31.5mm sieve pore is corresponding
Quality percent of pass be 95% ~ 100%.
Further, the cement is P.O42.5 portland cement；The sand is river sand, fineness modulus 2.4
~2.8；The silicon ash is level-one silicon ash；The water-reducing agent is high performance water reducing agent of polyocarboxy acid；The swelling agent is UEA
Type cement expansive material；Described basalt fibre 16 ~ 18um of single hole diameter, length 12mm, tensile strength > 4000MPa；It is described
Polypropylene fibre 16 ~ 21um of single hole diameter, length 19mm, tensile strength > 250MPa.
A kind of anti-crack and anti-seepage type bridge hinge seam concrete construction method, comprising the following steps:
(1) during concrete mixes and stirs ,+50%+75% water of sand of stone+silicon ash is first put into, 8 ~ 12min is stirred, then puts into
Cement++ 25% water of+50% sand of water-reducing agent+swelling agent stirs 12 ~ 15min, finally puts into basalt fibre+polypropylene fibre,
Stirring 8 ~ 12min seconds, stirring to fiber are evenly distributed, and it is 140mm that slump is required when concrete is transported to hinge seam construction site
±30mm；
(2) symmetrical longitudinal centre line is needed when concreting, two sides symmetrically pour behind first center, and concrete horizontal lift height is not
It greater than 30cm, is vibrated using internal vibration stick to concrete, angle of vibrating is 40 ~ 45 °, 5 ~ 10cm of depth of vibrating, often
One vibration point vibrating time is 20 ~ 30s；
(3) after concrete initial set, hair pulling treatment is carried out to hinge seam top surface concrete, gap hooks after hinge seam construction between beam bottom
Seam processing, it is ensured that beautiful；
(4) covering geotextiles and sprinkling maintenance are carried out after concrete final set in time, to prevent Surface layer's concrete shrinkage cracking, watering is supported
For shield to keep concrete surface to moisten often for degree, curing time is not less than 7d.
Compared with prior art, the present invention the advantage is that: (1) present invention optimizes water-reducing agent, swelling agent, basalt are fine
Peacekeeping polypropylene fibre the optimum mix amount range, can form microdilatancy self-compacting concrete, same in the density of enhancing concrete
When, water-reducing agent has hydrophobic effect, can enhance concrete impermeability；(2) by basalt fibre and polypropylene fibre by suitable
Length and volume are added, and can promote the compression strength and tensile splitting strength of material, alleviate concrete to a certain extent
The problem of crack developing；(3) construction method through the invention carries out hinge seam and pours the construction matter that can promote hinge seam concrete
Amount, the synthesis service performance of General Promotion hinge seam, is of great significance for the safety and stability of bridge structure.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be further described, but the present embodiment is not intended to restrict the invention,
It is all using similar method and its similar variation of the invention, protection scope of the present invention should all be included in.
Embodiment one
The present embodiment anti-crack and anti-seepage type bridge hinge seam concrete is made of raw material from the following weight: 500 parts of cement, sand 690
Part, 940 parts of stone, 165 parts of water, 40 parts of silicon ash, 4.7 parts of water-reducing agent, 26.5 parts of swelling agent, basalt fibre volume is concrete
The 0.12% of volume, polypropylene fiber are the 0.12% of volume of concrete.Wherein, stone is limestone gravel,
0.075mm, 2.36mm, 4.75mm, 9.5mm, 19mm, 26.5mm, 31.5mm sieve pore correspond to percent of pass be respectively 1.3%, 4.9%,
12.6%,30.4%,58.9%,81.2%,97.20%；Cement is P.O42.5 portland cement；Sand is river sand, and fineness modulus is
2.52；Silicon ash is level-one silicon ash；Water-reducing agent is high performance water reducing agent of polyocarboxy acid；Swelling agent is UEA type cement expansive material；The Black Warrior
Rock fiber single hole diameter 16um, length 12mm, tensile strength 4760MPa；16 length 19mm of polypropylene fibre single hole diameter, tension
Intensity 275MPa.
The present embodiment anti-crack and anti-seepage type bridge hinge seam concrete construction method, specific as follows:
(1) after concrete core slab is installed, side plate and middle plate plate end are fixed temporarily using timber wedge, cleaning hinge stitches interior rubbish
Rubbish and sundries, and artificial chiseling part is cleaned with clean water, it is wet with clean water to cored slab side and horseshoe position, to keep away
Exempt from outflow when hinge seam concreting, seals the gap between two panels cored slab in the beam bottom bamboo slab rubber for being installed with galvanized wire.
(2) during concrete mixes and stirs ,+75 wt % water of stone+50wt% sand+silicon ash is first put into, stirs 10min,
Then+25 wt % water of+50 wt % sand of cement+water-reducing agent+swelling agent is put into, 15min is stirred, finally puts into basalt fibre
+ polypropylene fibre stirs 10min seconds, and stirring to fiber is evenly distributed, and slump is when concrete is transported to hinge seam construction site
150mm。
(3) symmetrical longitudinal centre line is answered when concreting, two sides symmetrically pour behind first center.Concrete horizontal layering is thick
Degree is not more than 30cm, is vibrated using internal vibration stick to concrete, and angle of vibrating is 40 ~ 45 °, depth of vibrating 10cm,
Each vibration point vibrating time is 30s.
(4) after concrete initial set, hair pulling treatment is carried out to hinge seam top surface concrete.Gap is finished in hinge seam construction between beam bottom
Jointing is handled afterwards, it is ensured that beautiful.
(5) covering geotextiles and sprinkling maintenance are carried out after concrete final set, in time to prevent Surface layer's concrete shrinkage cracking.It spills
To keep concrete surface to moisten often for degree, curing time is not less than 7d for water curing.
By test, gained anti-crack and anti-seepage type bridge hinge seam concrete (embodiment one) performance indexes is shown in Table 1.
Embodiment two
The present embodiment anti-crack and anti-seepage type bridge hinge seam concrete is made of raw material from the following weight: 520 parts of cement, sand 700
Part, 970 parts of stone, 180 parts of water, 42 parts of silicon ash, 5.2 parts of water-reducing agent, 29.5 parts of swelling agent, basalt fibre volume is concrete
The 0.15% of volume, polypropylene fiber are the 0.15% of volume of concrete.Wherein, stone is limestone gravel,
0.075mm, 2.36mm, 4.75mm, 9.5mm, 19mm, 26.5mm, 31.5mm sieve pore correspond to percent of pass be respectively 0.8%, 3.7%,
11.5%,28.5%,60.3%,84.4%,96.10%；Cement is P.O42.5 portland cement；Sand is river sand, and fineness modulus is
2.45；Silicon ash is level-one silicon ash；Water-reducing agent is high performance water reducing agent of polyocarboxy acid；Swelling agent is UEA type cement expansive material；The Black Warrior
Rock fiber single hole diameter 16um, length 12mm, tensile strength 4760MPa；16 length 19mm of polypropylene fibre single hole diameter, tension
Intensity 275MPa.
The present embodiment anti-crack and anti-seepage type bridge hinge seam concrete construction method, specific as follows:
(1) after concrete core slab is installed, side plate and middle plate plate end are fixed temporarily using timber wedge, cleaning hinge stitches interior rubbish
Rubbish and sundries, and artificial chiseling part is cleaned with clean water, it is wet with clean water to cored slab side and horseshoe position, in beam
Bottom is sealed the gap between two panels cored slab with the bamboo slab rubber for being installed with galvanized wire.
(2) during concrete mixes and stirs ,+75 wt % water of+50 wt % sand of stone+silicon ash, stirring are first put into
Then 12min puts into+25 wt % water of+50 wt % sand of cement+water-reducing agent+swelling agent, stir 15min, finally put into the Black Warrior
Rock fiber+polypropylene fibre stirs 12min seconds, and stirring to fiber is evenly distributed, slump when concrete is transported to hinge seam construction site
Degree is 150mm.
(3) symmetrical longitudinal centre line is answered when concreting, two sides symmetrically pour behind first center.Concrete horizontal layering is thick
Degree is not more than 30cm, is vibrated using internal vibration stick to concrete, and angle of vibrating is 40 ~ 45 °, depth of vibrating 10cm,
Each vibration point vibrating time is 30s.
(4) after concrete initial set, hair pulling treatment is carried out to hinge seam top surface concrete.Gap is finished in hinge seam construction between beam bottom
Jointing is handled afterwards, it is ensured that beautiful.
(5) covering geotextiles and sprinkling maintenance are carried out after concrete final set, in time to prevent Surface layer's concrete shrinkage cracking.It spills
To keep concrete surface to moisten often for degree, curing time is not less than 7d for water curing.
By test, gained anti-crack and anti-seepage type bridge hinge seam concrete (embodiment two) performance indexes is shown in Table 1.
Embodiment three
The present embodiment anti-crack and anti-seepage type bridge hinge seam concrete is made of raw material from the following weight: 540 parts of cement, sand 730
Part, 990 parts of stone, 185 parts of water, 48 parts of silicon ash, 5.8 parts of water-reducing agent, 31.2 parts of swelling agent, basalt fibre volume is concrete
The 0.20% of volume, polypropylene fiber are the 0.20% of volume of concrete.Wherein, stone is basaltic broken stone,
0.075mm, 2.36mm, 4.75mm, 9.5mm, 19mm, 26.5mm, 31.5mm sieve pore correspond to percent of pass be respectively 0.92%, 4.3%,
13.6%,32.5%,63.5%,82.5%,98.50%；Cement is P.O42.5 portland cement；Sand is river sand, and fineness modulus is
2.50；Silicon ash is level-one silicon ash；Water-reducing agent is high performance water reducing agent of polyocarboxy acid；Swelling agent is UEA type cement expansive material；The Black Warrior
Rock fiber single hole diameter 16um, length 12mm, tensile strength 4760MPa；16 length 19mm of polypropylene fibre single hole diameter, tension
Intensity 275MPa.
The present embodiment anti-crack and anti-seepage type bridge hinge seam concrete construction method, specific as follows:
(1) after concrete core slab is installed, side plate and middle plate plate end are fixed temporarily using timber wedge, cleaning hinge stitches interior rubbish
Rubbish and sundries, and artificial chiseling part is cleaned with clean water, it is wet with clean water to cored slab side and horseshoe position, in beam
Bottom is sealed the gap between two panels cored slab with the bamboo slab rubber for being installed with galvanized wire.
(2) during concrete mixes and stirs ,+75 wt % water of+50 wt % sand of stone+silicon ash, stirring are first put into
Then 12min puts into+25 wt % water of+50 wt % sand of cement+water-reducing agent+swelling agent, stir 15min, finally put into the Black Warrior
Rock fiber+polypropylene fibre stirs 12min seconds, and stirring to fiber is evenly distributed, slump when concrete is transported to hinge seam construction site
Degree is 150mm.
(3) symmetrical longitudinal centre line is answered when concreting, two sides symmetrically pour behind first center.Concrete horizontal layering is thick
Degree is not more than 30cm, is vibrated using internal vibration stick to concrete, and angle of vibrating is 40 ~ 45 °, depth of vibrating 10cm,
Each vibration point vibrating time is 30s.
(4) after concrete initial set, hair pulling treatment is carried out to hinge seam top surface concrete.Gap is finished in hinge seam construction between beam bottom
Jointing is handled afterwards, it is ensured that beautiful.
(5) covering geotextiles and sprinkling maintenance are carried out after concrete final set, in time to prevent Surface layer's concrete shrinkage cracking.It spills
To keep concrete surface to moisten often for degree, curing time is not less than 7d for water curing.
By test, gained anti-crack and anti-seepage type bridge hinge seam concrete (embodiment three) performance indexes is shown in Table 1
Comparative example one
This comparative example is that common hinge stitches concrete, is made of raw material from the following weight: 480 parts of cement, 710 parts of sand, and stone
980 parts, 170 parts of water.Wherein, stone is limestone gravel, and cement is P.O42.5 portland cement.This comparative example concrete is applied
Work method is referring to common hinge seam concrete construction technology requirement.
Comparative example two
This comparative example is that common hinge stitches concrete, is made of raw material from the following weight: 500 parts of cement, 720 parts of sand, and stone
100 parts, 185 parts of water.Wherein, stone is limestone gravel, and cement is P.O42.5 portland cement.This comparative example concrete is applied
Work method is referring to common hinge seam concrete construction technology requirement.
By test, gained commonly cuts with scissors seam concrete (comparative example one) performance indexes and is shown in Table 1.
1 embodiment and comparative example concrete test result of table
| Number | Compression strength/MPa | Compression strength enhancing rate/% | Tensile splitting strength/MPa | Tensile splitting strength enhancing rate/% | Seepage-resistant grade |
| Embodiment one | 62.6 | 3.47% | 6.68 | 13.80% | P12 |
| Embodiment two | 64.3 | 6.28% | 6.72 | 14.48% | P12 |
| Embodiment three | 67.6 | 11.74% | 6.75 | 14.99% | P12 |
| Comparative example one | 60.5 | —— | 5.87 | —— | P8 |
| Comparative example two | 58.7 | —— | 5.74 | —— | P8 |
As shown in Table 1, anti-crack and anti-seepage type bridge hinge seam concrete is compared with common hinge seam concrete, compression strength be wanting in away from
It is smaller, but the promotion significant effect of tensile splitting strength, the seepage-resistant grade of anti-crack and anti-seepage type bridge hinge seam concrete also reach
P12 has preferable anti-permeability performance.In conclusion a kind of anti-crack and anti-seepage type bridge hinge seam concrete proposed by the present invention and its
Construction method has preferable using effect, can enhance concrete hinge seam quality, ensure bridge structure safe.
Embodiment described above is only the preferred embodiment of the present invention, it is noted that for the common of the art
For technical staff, without departing from the principle of the present invention, it can also make several improvements and retouch, these are improved and profit
Decorations also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of anti-crack and anti-seepage type bridge hinge seam concrete, which is characterized in that in terms of mass fraction, including 480 ~ 540 parts of cement,
680 ~ 740 parts of sand, 920 ~ 1000 parts of stone, 160 ~ 185 parts of water, 38 ~ 50 parts of silicon ash, 4 ~ 6 parts of water-reducing agent, swelling agent 25 ~ 32
Part, further include the basalt fibre for volume of concrete 0.08% ~ 0.22% and be volume of concrete 0.08% ~ 0.22% polypropylene
Fiber.
2. concrete according to claim 1, which is characterized in that the stone is that limestone gravel or basalt are broken
Stone, gradation claimed range are as follows: the corresponding quality percent of pass of 0.075mm sieve pore is the corresponding matter of 0% ~ 3%, 2.36mm sieve pore
Amount percent of pass is that the corresponding quality percent of pass of 0% ~ 8%, 4.75mm sieve pore is that the corresponding quality of 8% ~ 16%, 9.5mm sieve pore is logical
It is that the corresponding quality of 52% ~ 68%, 26.5mm sieve pore passes through that cross rate, which be the corresponding quality percent of pass of 24% ~ 38%, 19mm sieve pore,
Rate is that the corresponding quality percent of pass of 75% ~ 88%, 31.5mm sieve pore is 95% ~ 100%.
3. concrete according to claim 1, which is characterized in that the cement is P.O42.5 portland cement.
4. concrete according to claim 1, which is characterized in that the sand be river sand, fineness modulus be 2.4 ~
2.8。
5. concrete according to claim 1, which is characterized in that the silicon ash is level-one silicon ash.
6. concrete according to claim 1, which is characterized in that the water-reducing agent is high performance water reducing agent of polyocarboxy acid.
7. concrete according to claim 1, which is characterized in that the swelling agent is UEA type cement expansive material.
8. concrete according to claim 1, which is characterized in that the basalt fibre 16 ~ 18um of single hole diameter, it is long
Spend 12mm, tensile strength > 4000MPa.
9. concrete according to claim 1, which is characterized in that the polypropylene fibre 16 ~ 21um of single hole diameter, it is long
Spend 19mm, tensile strength > 250MPa.
10. based on the construction method of the anti-crack and anti-seepage type bridge hinge seam concrete as described in claim 1-9 is any, feature exists
In, comprising the following steps:
(1) during concrete mixes and stirs ,+50%+75% water of sand of stone+silicon ash is first put into, 8 ~ 12min is stirred, then puts into
Cement++ 25% water of+50% sand of water-reducing agent+swelling agent stirs 12 ~ 15min, finally puts into basalt fibre+polypropylene fibre,
Stirring 8 ~ 12min seconds, stirring to fiber are evenly distributed, and it is 140mm that slump is required when concrete is transported to hinge seam construction site
±30mm；
(2) symmetrical longitudinal centre line is needed when concreting, two sides symmetrically pour behind first center, and concrete horizontal lift height is not
It greater than 30cm, is vibrated using internal vibration stick to concrete, angle of vibrating is 40 ~ 45 °, 5 ~ 10cm of depth of vibrating, often
One vibration point vibrating time is 20 ~ 30s；
(3) after concrete initial set, hair pulling treatment is carried out to hinge seam top surface concrete, gap hooks after hinge seam construction between beam bottom
Seam processing, it is ensured that beautiful；
(4) geotextiles and sprinkling maintenance are covered after concrete final set in time, curing time is not less than 7d.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111848213A (en) * | 2020-07-23 | 2020-10-30 | 广州市广丰混凝土有限公司 | Heat-insulation concrete |
| CN113292287A (en) * | 2021-05-13 | 2021-08-24 | 中铁大桥局第七工程有限公司 | Anti-crack concrete for cable-stayed bridge tower column and preparation method thereof |
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