CN105369732A - Silicone foam sealant for bridge expansion joint and bridge expansion joint structure - Google Patents
Silicone foam sealant for bridge expansion joint and bridge expansion joint structure Download PDFInfo
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- CN105369732A CN105369732A CN201510428390.7A CN201510428390A CN105369732A CN 105369732 A CN105369732 A CN 105369732A CN 201510428390 A CN201510428390 A CN 201510428390A CN 105369732 A CN105369732 A CN 105369732A
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- 239000000565 sealant Substances 0.000 title claims abstract description 133
- 229920002323 Silicone foam Polymers 0.000 title claims abstract description 100
- 239000013514 silicone foam Substances 0.000 title claims abstract description 100
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000004590 silicone sealant Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 25
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 6
- 239000000306 component Substances 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 55
- 239000004567 concrete Substances 0.000 description 16
- 230000035882 stress Effects 0.000 description 10
- 230000006378 damage Effects 0.000 description 9
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002986 polymer concrete Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010042209 Stress Diseases 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- -1 with flatter Substances 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
- Sealing Material Composition (AREA)
- Road Paving Structures (AREA)
Abstract
A silicone foam sealant and a bridge expansion joint structure for bridge expansion joints are disclosed, wherein the silicone foam sealant comprises a silicone sealant white component, a silicone sealant ash component, a cross-linking agent, water and a platinum catalyst; the beam strips are fixed between the adjacent bridge deck pavement layers in a stretching way; the adjacent beam plates and the bridge deck pavement layers paved respectively are enclosed on the seam crossing plates to form sealing grooves, silicone foam sealant is filled in the sealing grooves, the upper surface of the sealant layer formed by the silicone foam sealant and the upper surface of the bridge deck pavement layers are on the same plane, and two ends of the sealant layer and the bridge deck pavement layers on two sides are arranged on the same plane; the width of the cross-slit plate is shorter than the width of the sealing groove, and both sides of the cross-slit plate are connected with the silicone foam sealant.
Description
Technical field
The present invention relates to a kind of bridge expanssion joint siliconefoam sealant and bridge expansion joint structure.
Background technology
Existing bridge expansion joint structure is mostly directly exposed, because long term exposure is under the environment of air, dust, foreign material chip, vehicle exhaust and acid rain, causes it damage gradually and greatly reduce application life.Simultaneously by the repeated stock that vehicle continues for a long time, also can produce the health at shrinkage joint and have a strong impact on.The acting in conjunction of these factors can cause shrinkage joint joint to destroy the bridge hardware such as (concrete joint cracking destruction or steel joint corrosion and destruction), steel plate destruction, the dislocation or limited of shrinkage joint deformation displacement.In the worst cases, the accumulation of these defects and damage can cause the inefficacy of bridge construction and even collapse.
Summary of the invention
In order to overcome existing the problems referred to above, the invention provides a kind of bridge expanssion joint siliconefoam sealant and bridge expansion joint structure.
The technical solution used in the present invention is:
A kind of bridge expanssion joint siliconefoam sealant, described siliconefoam sealant comprises the white component of silicone sealant, silicone sealant ash component, crosslinking agent, water and platinum catalyst, wherein:
The mass fraction of the white component of described silicone sealant is 464 ~ 498 parts;
The mass fraction of described silicone sealant ash component is 495 ~ 461 parts;
The mass fraction of described crosslinking agent is 22 parts;
The mass fraction of described water is 16 ~ 14 parts;
The mass fraction of described platinum catalyst is 3 ~ 5 parts.
Further, described siliconefoam sealant is made up of the white component of silicone sealant, silicone sealant ash component, crosslinking agent, water and platinum catalyst.
Further, described crosslinking agent is BaysiloneU430 crosslinking agent.
Further, described platinum catalyst is C
24h
54o
3pt
2si
5, wherein the mass loading amount of active component platinum is 2.0-2.2%;
Further, the white component of described silicone sealant is
siliconeSealwhitecomponents;
Described silicone sealant ash component is
siliconeSealgraycomponents.
Further, described siliconefoam sealant by
siliconeSealwhitecomponents,
siliconeSealgraycomponents, BaysiloneU430 crosslinking agent, water and C
24h
54o
3pt
2si
5catalyzer forms, wherein:
Described
the mass fraction of SiliconeSealwhitecomponents is 464 ~ 498 parts;
Described
the mass fraction of SiliconeSealgraycomponents is 495 ~ 461 parts;
The mass fraction of described BaysiloneU430 is 22 parts;
The mass fraction of described water is 16 ~ 14 parts;
Described C
24h
54o
3pt
2si
5mass fraction be 3 ~ 5 parts.
A kind of bridge expansion joint structure utilizing described siliconefoam sealant to fill, described bridge expansion joint structure comprises shrinkage joint and is arranged on the hermetically-sealed construction on described shrinkage joint, formation shrinkage joint, space between adjacent two pieces of beam slabs, beam slab described in every block is all equipped with bridge deck pavement, and described bridge deck pavement is shorter than described beam slab to reserve assemblage gap
Described hermetically-sealed construction comprises transverse joint plate, bundle bar and sealant layer;
Described transverse joint plate to be laid on described shrinkage joint and to cover described shrinkage joint completely; Between adjacent described bridge deck pavement, stretch-draw is fixed with bundle bar; Adjacent beam slab encloses with the bridge deck pavement laid separately and forms seal groove on described transverse joint plate, be filled with described siliconefoam sealant in described seal groove, and the upper surface of the upper surface of the sealant layer formed by described siliconefoam sealant and bridge deck pavement at grade;
The width of described transverse joint plate is shorter than the width of described seal groove, and the both sides of described transverse joint plate are all connected with described siliconefoam sealant.
Further, described bundle bar is equidistantly arranged, and is arranged at grade.
Further, described bundle bar is made up of ti-ni shape memory alloy, and wherein the mass fraction of titanium is 49.8%, and the mass fraction of nickel is 49.8%; One end of described bundle bar is fixed on the described bridge deck pavement of side, is provided with stretch-draw anchor tooth plate in the described bridge deck pavement of opposite side, and the other end stretch-draw of described bundle bar is fixed on described stretch-draw anchor tooth plate.
Further, described transverse joint plate is steel plate, plastic plate or poly (methyl methacrylate) plate.
Further, the sequence of construction of described hermetically-sealed construction, for be first placed on shrinkage joint by transverse joint plate, then to be installed bundle bar, finally in described seal groove, is watered described siliconefoam sealant.Beneficial effect of the present invention is embodied in:
1, sealant layer and front and back bridge deck pavement form non-individual body, and more steady than seamed bridge floor, comfortable, the noiselessness of driving a vehicle, vibration are little.
2, simple structure, construction does not need installing special telescoping member and at the pre-buried anchor bar of beam-ends, and technique is simple and easy to grasp, and easy construction is quick.
3, the own waterproof, seepage control excellent performance of siliconefoam sealant; Sealant layer is connected with deck paving simultaneously, therefore the water resistance of sealant layer entirety is good.
4, siliconefoam sealant has excellent Regeneration and Repair function, unavoidably there is damaged condition after long period under arms in sealant layer, can on the basis of former sealant layer, through the process of preliminary surface polishing grinding, making siliconefoam sealant is repaired again thereon, thus realizes good recycling utilization.
5, memorial alloy itself has super-elasticity, energy-absorbing energy-dissipating characteristic, work together with siliconefoam sealant, can be effectively sluggish and reduce dilatation extreme value between beam body, make to have compliance widely, be applicable to the bridges and culverts stretching device of multiple addendum modification, can be widely used in various telescopic displacement value, the various city across footpath, the culvert of public affairs (iron) road and bridge.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is sealant compression recovery extent schematic diagram.
Fig. 3 is the plastic cylinder structural representation adopted in experiments of sealing performance.
Fig. 4 is platinum catalyst C
24h
54o
3pt
2si
5structural formula
Detailed description of the invention
With reference to accompanying drawing, a kind of bridge expanssion joint siliconefoam sealant, described siliconefoam sealant is made up of the white component of silicone sealant, silicone sealant ash component, crosslinking agent, water and platinum catalyst, wherein:
The mass fraction of the white component of described silicone sealant is 464 parts;
The mass fraction of described silicone sealant ash component is 495 parts;
The mass fraction of described crosslinking agent is 22 parts;
The mass fraction of described water is 16 parts;
The mass fraction of described platinum catalyst is 3 parts.
Further, described crosslinking agent is BaysiloneU430 crosslinking agent.
Further, described platinum catalyst is C
24h
54o
3pt
2si
5, wherein the mass loading amount of active component platinum is 2.0-2.2%;
Further, the white component of described silicone sealant is
siliconeSealwhitecomponents;
Described silicone sealant ash component is
siliconeSealgraycomponents.
A kind of bridge expansion joint structure utilizing described siliconefoam sealant to fill, the hermetically-sealed construction that described bridge expansion joint structure comprises shrinkage joint 2 and is arranged on described shrinkage joint 2, formation shrinkage joint, space 2 between adjacent two pieces of beam slabs 1, beam slab 1 described in every block is all equipped with bridge deck pavement 3, and described bridge deck pavement 3 is shorter than described beam slab 1 to reserve assemblage gap, it is characterized in that:
Described hermetically-sealed construction comprises transverse joint plate 4, bundle bar 6 and sealant layer 5;
Described transverse joint plate 4 to be laid on described shrinkage joint 2 and to cover described shrinkage joint 2 completely; Between adjacent described bridge deck pavement 3, stretch-draw is fixed with bundle bar 6; Adjacent beam slab 1 encloses with the bridge deck pavement 3 laid separately and forms seal groove on described transverse joint plate 4, be filled with described siliconefoam sealant in described seal groove, and the upper surface of the upper surface of the sealant layer 5 formed by described siliconefoam sealant and bridge deck pavement 3 at grade;
The width of described transverse joint plate 4 is shorter than the width of described seal groove, and the surrounding of described transverse joint plate 4 is connected with described siliconefoam sealant.
Further, described bundle bar 6 is equidistantly arranged, and is arranged at grade.
Further, described bundle bar 6 is made up of ti-ni shape memory alloy, and wherein the mass fraction of titanium is 49.8%, and the mass fraction of nickel is 49.8%; One end of described bundle bar 6 is fixed on the described bridge deck pavement 3 of side, is provided with stretch-draw anchor tooth plate in the described bridge deck pavement 3 of opposite side, and the other end stretch-draw of described bundle bar 6 is fixed on described stretch-draw anchor tooth plate.
Further, described transverse joint plate 4 is steel plate, plastic plate or poly (methyl methacrylate) plate.
Further, the sequence of construction of described hermetically-sealed construction, for be first placed on shrinkage joint 2 by transverse joint plate 4, then to be installed bundle bar 6, finally in described seal groove, is watered described siliconefoam sealant.
Described
siliconeSealwhitecomponents and described
siliconeSealgraycomponents is all purchased from water Sen Boman Amy that company (WATSONBOWMANACMECORP).
Described crosslinking agent is that BaysiloneU430crosslinker, Baysilone are temporarily without unified translator of Chinese; Described platinum catalyst is Pt-divinyltetramethyl-disiloxanecomplexGelestInc, and its product description is as shown in table 1:
The product description of table 1 platinum catalyst (C24H54O3Pt2Si5)
1, install
1.1, restraint bar 6: the described bridge deck pavement 3 of side is provided with stretch-draw anchor tooth plate, bundle bar 6 one end is fixed in bridge deck pavement 3, the other end and stretch-draw anchor truss plate connection, and bundle bar 6 is one-end tension mode, and namely one end is fixed, tensioned at one end.
1.2, transverse joint plate 4: the basic demand of installation is that the cohesive energy not affecting siliconefoam sealant is distributed, thus ensures the uniformity of hermetically-sealed construction in loading process, can extend the application life of hermetically-sealed construction like this.The major function of described transverse joint plate 4 is the described siliconefoam sealants on shrinkage joint 2 sealing carrying top, because transverse joint plate 4 and siliconefoam sealant participate in work jointly, for not affecting the distribution of cohesive energy in compound, the bottom surface of transverse joint plate 4 can not bond with the end face of beam slab 1, does not namely need coating adhesive between transverse joint plate 4 and beam slab 1 concrete surface.And be bonded as one, so also need not baffle plate be arranged in case make transverse joint plate 4 drop along with the increase of shrinkage joint 2 telescopic displacement on transverse joint plate 4 both sides due to transverse joint plate 4 and siliconefoam sealant.
2, the construction of stretching device
2.1, before construction, need the internal face to described seal groove, comprise the beam slab 1 of bottom surface, the concrete of the bridge deck pavement 3 of side carry out dabbing, cleaning and dry process, to realize the concrete better bonding of siliconefoam sealant and beam slab 1, bridge deck pavement 3.
2.2, construction sequence: first transverse joint plate 4 is placed on shrinkage joint 2 during construction, then install and stretch-draw bundle bar 6, finally in described seal groove, water described siliconefoam sealant:
A, internal face to described seal groove, comprise the beam slab 1 of bottom surface, the concrete of the bridge deck pavement 3 of side carry out dabbing, cleaning and dry process, then transverse joint plate 4 is placed on shrinkage joint 2, the stretch-draw of stretch-draw bundle bar 6 is fixed on described bridge deck pavement 3.
The size of the described seal groove on b, measurement shrinkage joint 2, calculates the quality of often kind of material needed for siliconefoam sealant.
C, prepare following engineering material, prepare siliconefoam sealant:
Mass fraction is for described in 464 parts
siliconeSealwhitecomponents;
Mass fraction is for described in 495 parts
siliconeSealgraycomponents;
Mass fraction is the described BaysiloneU430 crosslinking agent of 22 parts;
Mass fraction is the water of 16 parts;
Mass fraction is the described platinum catalyst C of 3 parts
24h
54o
3pt
2si
5.
D, cooling raw material
Under cryogenic conditions, reaction speed can be slack-off, will half be reduced when temperature reduces by 10 DEG C of chemical reaction rates, so raw material react under cryogenic, can reaction rate be reduced, make to provide the more time to sealant before foamable reaction terminates, so will
siliconeSealgraycomponents,
siliconeSealwhitecomponents, BaysiloneU430 crosslinking agent, water and platinum catalyst C
24h
54o
3pt
2si
5load the cooling of ice-cooled device.
E, produce siliconefoam sealant
First by cooled
siliconeSealgraycomponents,
siliconeSealwhitecomponents, water and platinum catalyst C
24h
54o
3pt
2si
5mix and stir; Finally add BaysiloneU430 crosslinking agent and fully mixing, this is because BaysiloneU430 crosslinking agent is easy and water reacts, so need to guarantee that water mixes in the mixture equably before adding BaysiloneU430 crosslinking agent; Finally
siliconeSealgraycomponents,
siliconeSealwhitecomponents, water, BaysiloneU430 crosslinking agent are at platinum catalyst C
24h
54o
3pt
2si
5catalytic action under polymerization reaction take place, generate hydrogen and siliconefoam sealant.
F, pouring seal groove
The described siliconefoam sealant obtained is poured in the seal groove on shrinkage joint 2.And need another personnel to follow after the personnel toppling over siliconefoam sealant, with flatter, siliconefoam sealant is flattened.
The fusing point of described siliconefoam sealant is higher and have enough adhesion stresss with steel plate, so siliconefoam sealant can be bonding to described transverse joint plate 4 firmly, described transverse joint plate 4 is positioned on sealant layer 5 and forms entirety with whole sealant layer 5, and other fastening devicess can not be set because of the two ends of transverse joint plate 4 and fall in shrinkage joint 2 when shrinkage joint 2 is stretched out.Described siliconefoam sealant and concrete also have good adhesion stress, whole like this sealant layer 5 all has good cementation with seal groove inwall, sealant layer 5 sticks in seal groove firmly, be connected with deck paving, overall water proofing property and along with the performance that shrinkage joint 2 is flexible all fine.
3, siliconefoam sealant performance test checking
Through testing inspection, each technical indicator of described siliconefoam sealant is as shown in table 2.
Each technical indicator of table 2 siliconefoam sealant
3.1, elastic recovery capability checking:
The test of compression restorability need be carried out:
Beam slab 1 can stretch because of variations in temperature thus cause the compression of stretching device.Expect that the sealant layer 5 used in bridge expanssion joint 2 reaches the compression displacement of shrinkage joint 2 width half.Long compressive state may make sealant layer 5 occur stress relaxation and lose the ability returning to original size and shape, and the tensile stress higher when shrinkage joint 2 expands can cause sealant layer 5 that cohesional failure or adhesive failure occur.The object of this test recovers the ability of reset condition after test sealant layer 5 is in high temperature compressed 24h.Test method follows ISO815 (ISO, 1991).
Test specimen 1:
Siliconefoam sealant layer, be the square section of 25.4mm × 25.4mm, thickness is 12.7mm;
Concrete cover: be 50.4mm × 50.4mm square section, thickness is 12.7mm;
Siliconefoam sealant layer is arranged between two block concrete flaggies and forms test specimen 1.
Test specimen 2:
Common silicone sealant layer, be the square section of 25.4mm × 25.4mm, thickness is 12.7mm;
Concrete cover: be 50.4mm × 50.4mm square section, thickness is 12.7m;
Common silicone sealant layer is arranged between two block concrete flaggies and forms test specimen 2.
Test specimen 1 and test specimen 2 are all compressed into 50% of original thickness, and are placed in baking oven maintenance 45 DEG C of high temperature 24h.Subsequently, release test specimen 1 and the compression of test specimen 2, and with its thickness of different time interval measurement, until its thickness basicly stable be a steady state value.Compressive strain ε
setthe difference of the thickness after representing original thickness and compressing, represents with percents:
ε
set＝(t
0-t
r)/(t
0-t
s)×100％
Wherein: t
0for test specimen original thickness, t
rfor test specimen recovers rear thickness, t
sfor thickness after initial compression, as shown in Figure 2, siliconefoam sealant permanent compressive deformation is obviously greater than common silicone sealant to result of the test as can be seen from Figure 2, but this is the data that test specimen release compresses in latter 1 hour.After the long-time compression of experience, air extrudes from foam cell; After release is removed, air can from refluxing return-air room around, and this process need be greater than the 1h time, and final siliconefoam sealant can return to more than 90% of the front width of compression or height, can meet practical implementation requirement.
3.2 verify with concrete, steel plate adhesive property
Carry out Erichsen test:
Carry out stretching until damage test, adopt pitch, steel, polymer concrete, concrete to be that primer makes test specimen respectively, often kind of primer makes 8 test specimens-wherein 4 use siliconefoam sealants, and 4 use common silicone sealants.For stretching until damage test, each test specimen is placed in universal testing machine, stretches two bottom blocks until destroy with the loading speed of 10mm/min after solidifying 21 days under room temperature condition (23 DEG C).Stretch until the result of the test destroyed is as shown in table 3:
Table 3 Erichsen test result
Can conclusion be obtained by table 3: this test obtain siliconefoam sealant and common silicone sealant bonding steel, pitch and polymer concrete bottom time p value be respectively 0.02 (T=3.69), 0.03 (T=3.3) and 0.09 (T=2.23).Statistically known by compare test, when bonding steel and pitch, the limit in mean strain of siliconefoam sealant is higher than common silicone sealant.But, the p value calculating gained when siliconefoam sealant and common silicone sealant cohesive polymers concrete but with threshold values 0.05 closely, but finally we can not show that the limit in mean of siliconefoam sealant strains the conclusion identical with common silicone sealant.In view of this result has criticality, have reason to believe that, along with further test, data may show: when cohesive polymers concrete, the limit in mean strain of siliconefoam sealant can strain higher than the limit in mean of common silicone sealant.
The low modulus (during 100% strain stress) of siliconefoam sealant means when sealant is subject to stretch-draw, and siliconefoam sealant can be stretched to the strain larger than common silicone sealant, applies less stress to bottom simultaneously.Because less stress is applied on bottom, siliconefoam sealant often can not destroy at surface interface, and sealant cohesional failure can occur.In contrast, common silicone sealant can cause the destruction (adhesive failure) occurred on the interface top layer of sealant and bottom frequently at the higher stress of bonded areas effect, fully demonstrated siliconefoam sealant and compared conventional seals agent and have good in adhesive property that the is primer such as concrete, steel.Meanwhile, when stone is squeezed to encapsulant surface, siliconefoam sealant can produce distortion, compares common silicone sealant and can produce less stress, and low stress makes the active force of sealant to primer less, further increases adhesive property.
3.3, waterproof, seepage control performance verification
Carry out experiments of sealing performance:
Need to carry out sealing performance test to siliconefoam sealant, to check this material leaks under whether stormy weather allows ponding.In order to assess this point, ponding test need be carried out.
Employing diameter d is the plastic cylinder 7 of 10cm, and be placed in bucket by foamed plastics stopper, the distance L1 of foamed plastics stopper and bung is 15cm, and siliconefoam sealant is poured over plug top, until thickness L2 is 3cm just after its foaming.Finally, water is poured into the end face of drum 7, until when depth of water L3 is 10cm, the distance L4 of the water surface and bung is 2cm, as shown in Figure 3, is finally built by bung.
Observe siliconefoam sealant will how to make a response to external factor, like rain water mitigation at its initial solidification phase.Therefore, before retaining, siliconefoam sealant only allows solidification 1 hour or 2 hours.Four groups of test units solidify the siliconefoam sealant of 1 hour before adopting ponding, other four groups of test units adopt the ponding front solidification siliconefoam sealant of 2 hours.In the process of ensuing 7 days, the siliconefoam sealant in soaking is monitored, whether observe ponding by this siliconefoam sealant leakage, and record depth of accumulated water drop-out value.
Result of the test: observe siliconefoam sealant afterwards in 7 days and can determine that whether water is by sealant bottom surface seepage, for the siliconefoam sealant having solidified 1 hour before ponding, its depth of accumulated water drop-out value is 0.5,0.7,0.4,0.3 centimetre, does not have test specimen to occur water accumulation leaking situation.For the siliconefoam sealant solidifying 2 hours before ponding of solidification, depth of accumulated water drop-out value is 1.4,0.8,0.8,0.7 centimetres, does not also have test specimen to occur water accumulation leaking situation.Although siliconefoam sealant right and wrong are infiltrative, in this test, 7 days there is slight decline in the internal water accumulation degree of depth really.This can absorb part water owing to evaporation of water and siliconefoam sealant.Support siliconefoam sealant, because stopper also seals drum 7 inwall, never in any form so the water accumulation leaking that this foam plug can not stop any generation possible in whole duration of test foam plug always.Perhaps because foam plug supports the reason of this siliconefoam sealant, siliconefoam sealant does not show the sign of any distortion.Test shows that siliconefoam sealant has good waterproof, seepage control performance.
3.4, Regeneration and Repair performance verification
Need carry out keeping in repair/reforming test:
After being applied to actual bridge expanssion joint 2, sealant layer 5 may be damaged, and therefore, determining whether can be significant to the part of repairing damage to broken parts by means of only adding new sealant blends.For assessing this situation, needing to design and carrying out repairing test.The existing sealant solidified in bonded areas surface of each test specimen, comprises siliconefoam sealant and common silicone sealant.Then test specimen is covered upper new (existing system) sealant.Test group makes according to following feature: new siliconefoam sealant is sealed in old (consolidation/use) foam seal agent by 4 test specimens, new common silicone sealant is sealed to old foam seal agent test specimen by 4 test specimens, new siliconefoam sealant is sealed on old common silicone sealant test specimen by 4 test specimens, and new common silicone sealant sample is sealed on old common silicone sealant test specimen by 4 test specimens.With the loading speed of 10mm/min, each test specimen is stretched until rupture test.
Result of the test is as shown in table 4:
Table 4 keeps in repair or the stretch test result of reforming test
Show that siliconefoam sealant can safely in the self-regeneration of old sealant (comprising siliconefoam sealant and common silicone sealant) that damaged by repairing result of the test, shrinkage joint 2 can be made again to have using function in former pointing described siliconefoam sealant making, thus realize good regeneration cycle use.
Content described in this manual embodiment is only exemplifying the way of realization of inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form of embodiment statement, and protection scope of the present invention also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (10)
1. a bridge expanssion joint siliconefoam sealant, is characterized in that: described siliconefoam sealant comprises the white component of silicone sealant, silicone sealant ash component, crosslinking agent, water and platinum catalyst, wherein:
The mass fraction of the white component of described silicone sealant is 464 ~ 498 parts;
The mass fraction of described silicone sealant ash component is 495 ~ 461 parts;
The mass fraction of described crosslinking agent is 22 parts;
The mass fraction of described water is 16 ~ 14 parts;
The mass fraction of described platinum catalyst is 3 ~ 5 parts.
2. a kind of bridge expanssion joint siliconefoam sealant as claimed in claim 1, is characterized in that: described siliconefoam sealant is made up of the white component of silicone sealant, silicone sealant ash component, crosslinking agent, water and platinum catalyst.
3. bridge expanssion joint siliconefoam sealant as claimed in claim 1 or 2, is characterized in that: described crosslinking agent is BaysiloneU430 crosslinking agent.
4. bridge expanssion joint siliconefoam sealant as claimed in claim 1 or 2, is characterized in that: described platinum catalyst is C
24h
54o
3pt
2si
5, wherein the mass loading amount of active component platinum is 2.0 ~ 2.2%.
5. bridge expanssion joint siliconefoam sealant as claimed in claim 1 or 2, is characterized in that: the white component of described silicone sealant is
whitecomponents;
Described silicone sealant ash component is
graycomponents.
6. a kind of bridge expanssion joint siliconefoam sealant as claimed in claim 1 or 2, is characterized in that: described siliconefoam sealant by
whitecomponents,
graycomponents, BaysiloneU430 crosslinking agent, water and C
24h
54o
3pt
2si
5catalyzer forms, wherein:
Described
the mass fraction of whitecomponents is 464 ~ 498 parts;
Described
the mass fraction of graycomponents is 495 ~ 461 parts;
The mass fraction of described BaysiloneU430 crosslinking agent is 22 parts;
The mass fraction of described water is 16 ~ 14 parts;
Described C
24h
54o
3pt
2si
5the mass fraction of catalyzer is 3 ~ 5 parts.
7. the bridge expansion joint structure utilizing the siliconefoam sealant described in claim 1 to fill, described bridge expansion joint structure comprises shrinkage joint and is arranged on the hermetically-sealed construction on described shrinkage joint, space between adjacent two pieces of beam slabs forms described shrinkage joint, beam slab described in every block is all equipped with bridge deck pavement, and described bridge deck pavement is shorter than described beam slab to reserve assemblage gap, it is characterized in that:
Described hermetically-sealed construction comprises transverse joint plate, bundle bar and sealant layer;
Described transverse joint plate to be laid on described shrinkage joint and to cover described shrinkage joint completely; Between adjacent described bridge deck pavement, stretch-draw is fixed with bundle bar; Adjacent beam slab encloses with the bridge deck pavement laid separately and forms seal groove on described transverse joint plate, be filled with described siliconefoam sealant in described seal groove, and the upper surface of the upper surface of the sealant layer formed by described siliconefoam sealant and bridge deck pavement at grade;
The width of described transverse joint plate is shorter than the width of described seal groove, and the both sides of described transverse joint plate are all connected with described siliconefoam sealant.
8. bridge expansion joint structure as claimed in claim 7, is characterized in that: bundle bar is equidistantly arranged, and is arranged at grade; Described bundle bar is made up of ti-ni shape memory alloy, and wherein the mass fraction of titanium is 49.8%, and the mass fraction of nickel is 49.8%; One end of described bundle bar is fixed on the described bridge deck pavement of side, is provided with stretch-draw anchor tooth plate in the described bridge deck pavement of opposite side, and the other end stretch-draw of described bundle bar is fixed on described stretch-draw anchor tooth plate.
9. bridge expansion joint structure as claimed in claim 7, is characterized in that: described transverse joint plate is steel plate, plastic plate or poly (methyl methacrylate) plate.
10. bridge expansion joint structure as claimed in claim 7, is characterized in that: the sequence of construction of described hermetically-sealed construction, for be first placed on shrinkage joint by transverse joint plate, then to be installed bundle bar, finally in described seal groove, watered described siliconefoam sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510428390.7A CN105369732A (en) | 2015-07-20 | 2015-07-20 | Silicone foam sealant for bridge expansion joint and bridge expansion joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510428390.7A CN105369732A (en) | 2015-07-20 | 2015-07-20 | Silicone foam sealant for bridge expansion joint and bridge expansion joint structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105369732A true CN105369732A (en) | 2016-03-02 |
Family
ID=55372321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510428390.7A Pending CN105369732A (en) | 2015-07-20 | 2015-07-20 | Silicone foam sealant for bridge expansion joint and bridge expansion joint structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105369732A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702890A (en) * | 2016-12-17 | 2017-05-24 | 浙江工业大学 | Caulking strip for bridge type steel expansion joint |
| CN106758797A (en) * | 2016-12-17 | 2017-05-31 | 浙江工业大学 | Bridge type steel expansion joint serves as a contrast bar with filleting |
| CN108505437A (en) * | 2018-05-22 | 2018-09-07 | 杭州溯真科技有限公司 | A kind of extrusion item for expansion gap device |
| CN109024301A (en) * | 2018-09-05 | 2018-12-18 | 贵州顺康路桥咨询有限公司 | A kind of expansion joint tensioning equipment |
| CN111705640A (en) * | 2020-06-05 | 2020-09-25 | 常州市市政工程设计研究院有限公司 | Seamless expansion joint structure for bridge joint treatment and construction process thereof |
-
2015
- 2015-07-20 CN CN201510428390.7A patent/CN105369732A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| RAMESH B.MALLA等: "Laboratory evaluation of silicone foam sealant bonded to various header materials used in bridge expansion joints", 《CONSTRUCTION AND BUILDING MATERIALS》 * |
| RAMESH B.MALLA等: "LABORATORY EVALUATION OF SILICONE FOAM SEALANT FOR FIELD APPLICATION ON BRIDGE EXPANSION JOINTS", 《EXPERIMENTAL AND APPLIED MECHANICS》 * |
| RAMESH B.MALLA等: "SEALING OF SMALL MOVEMENT BRIDGE EXPANSION JOINTS", 《COMPRESSION》 * |
| 孙齐磊等: "《工程材料及其热处理》", 31 August 2014 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702890A (en) * | 2016-12-17 | 2017-05-24 | 浙江工业大学 | Caulking strip for bridge type steel expansion joint |
| CN106758797A (en) * | 2016-12-17 | 2017-05-31 | 浙江工业大学 | Bridge type steel expansion joint serves as a contrast bar with filleting |
| CN106758797B (en) * | 2016-12-17 | 2019-02-01 | 浙江工业大学 | Bridge type steel expansion joint serves as a contrast item with filleting |
| CN108505437A (en) * | 2018-05-22 | 2018-09-07 | 杭州溯真科技有限公司 | A kind of extrusion item for expansion gap device |
| CN109024301A (en) * | 2018-09-05 | 2018-12-18 | 贵州顺康路桥咨询有限公司 | A kind of expansion joint tensioning equipment |
| CN109024301B (en) * | 2018-09-05 | 2024-01-26 | 贵州顺康检测股份有限公司 | Expansion joint stretching equipment |
| CN111705640A (en) * | 2020-06-05 | 2020-09-25 | 常州市市政工程设计研究院有限公司 | Seamless expansion joint structure for bridge joint treatment and construction process thereof |
| CN111705640B (en) * | 2020-06-05 | 2021-10-29 | 常州市市政工程设计研究院有限公司 | Seamless expansion joint structure for bridge joint treatment and construction process thereof |
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