CN102288630A - Method for testing and detecting temperature endurance performance of CA (cement asphalt) mortar mixture for plate type ballastless track - Google Patents
Method for testing and detecting temperature endurance performance of CA (cement asphalt) mortar mixture for plate type ballastless track Download PDFInfo
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- CN102288630A CN102288630A CN2011101222458A CN201110122245A CN102288630A CN 102288630 A CN102288630 A CN 102288630A CN 2011101222458 A CN2011101222458 A CN 2011101222458A CN 201110122245 A CN201110122245 A CN 201110122245A CN 102288630 A CN102288630 A CN 102288630A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 133
- 239000000203 mixture Substances 0.000 title claims abstract description 77
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000004568 cement Substances 0.000 title abstract description 28
- 239000010426 asphalt Substances 0.000 title abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims description 65
- 238000003756 stirring Methods 0.000 claims description 22
- 238000013461 design Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007665 sagging Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 238000010276 construction Methods 0.000 description 15
- 239000013530 defoamer Substances 0.000 description 15
- 239000003638 chemical reducing agent Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 239000012634 fragment Substances 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 241001669679 Eleotris Species 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 239000011427 bitumen mortar Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011509 cement plaster Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Abstract
The invention provides a method for testing and detecting the temperature endurance performance of a CA (cement asphalt) mortar mixture for a plate type ballastless track, which comprises the following steps: a, preparation of the CA mortar mixture, namely, placing all materials in an agitating pan for mixing to obtain the CA mortar mixture; b, measurement of the initial mobility T1 of the CA mortar mixture; c, the age storage of the CA mortar mixture; d, the measurement of the 30-min mobility of the CA mortar mixture; and e, the judgment of the temperature endurance performance of the CA mortar mixture, namely, when T2 is not more than 300 s, the temperature endurance performance is grade I, and further, the smaller the T2-T1 is, the better the temperature endurance performance is; when T1 is less than 300 s but the T2 is not less than 300 s, the judgment of the temperature endurance performance is carried out by combining with a vertical subsidence depth; and when T1 is not less than 300 s, the temperature endurance performance is grade V. By using the method, the temperature endurance performance of the CA mortar mixture is comprehensively judged according to T1, T2 and the vertical subsidence depth, and the temperature endurance performance of the CA mortar mixture for the plate type ballastless track can be detected and estimated reasonably.
Description
Technical field
The invention belongs to building materials detection technique field, be specifically related to a kind of plate-type ballastless track CA mortar mixture heat resistance method for testing and detecting.
Background technology
Along with Chinese society and rapid economy development, interzone visitor, goods come and go frequent day by day, in sharp increase, original railway system day by day seems unable to do what one wishes because of factors such as speed is slow, comfort level differences to people in the environment of social economy's great development to the demand of transportation by railroad.High speed is the target of railway development.Railway high speed requirement track structure possesses that stability, ride comfort, track elasticity are suitable, track component reliably reaches conditions such as maintenance facility.The track structure form that high-speed railway adopts is divided into tiny fragments of stone, coal, etc. track and non-fragment orbit two classes, and wherein, non-fragment orbit mainly replaces original shot railway ballast as vibration-proof structure by fastener system or elastic insert.The more general non-fragment orbit structure rail of current application pillow supporting type, sleeper are embedded, sleeper flush type, the prefabricated railway roadbed of board-like, the no sleeper of the cast-in-place railway roadbed of no sleeper board-like (plate-type ballastless track) are several.Wherein, so-called " plate-type ballastless track " be with prefabricated track plate directly " placement " on concrete bed, adjust the track plate by backfilling cement bituminous mortar between track plate and base (cerment asphalt mortar is called for short the CA mortar) material, to guarantee to lay precision.The CA mortar be a kind of by cement, emulsified asphalt, fine aggregate (sand), compound, water, aluminium powder, and function additive multiple starting material such as (water reducer, defoamers etc.) form, a kind of novel organic/inorganic composite material that forms through the glued acting in conjunction of hydrated cementitious sclerosis and pitch breakdown of emulsion, it forms that complicated, performance index require characteristics such as high, that difficulty of preparation technology is big and the gordian technique that becomes the non-fragment orbit site operation with raw material.
The CA mortar is as a kind of big water cement ratio, upper flow regime perfusion mortar, and the asphalt emulsifier that comprises in its starting material, water reducer and defoamer etc. are surfactant, and surfactant has a key property, promptly to responsive to temperature.Therefore, CA mortar mixture is also a kind of material very responsive to temperature, and it is often improper because of construction temperature, and emulsified asphalt usually occurring, to shift to an earlier date the loss of breakdown of emulsion, CA mortar fluidity too fast and cause problems such as irritating plate operation failure.In addition, technical matterss such as the bleeding of CA mortar, layering and gassiness instability are also relevant with temperature, and this is a disaster to the completion time of project of high-speed railway not only, also will bring enormous economic loss simultaneously.Though some present code requirements and construction instruct the temperature when requiring the CA mortar to irritate the plate construction must not be higher than 35 ℃, but China's area is wide, difference of latitude is bigger between the north and south, it is also very big that temperature differs, especially the south highest temperature in summer generally all is higher than 35 ℃, and this heat resistance to CA mortar mixture is a severe test.
At present, the working-yard generally adopts initial flow degree, divergence and the divergence of CA mortar to reach the serviceability that indexs such as used time of 280mm are weighed the CA mortar, but when under hot conditions, constructing, it is functional usually to run into the initialization of CA mortar, after transhipment, the problem that but can't pour into fully when irritating the plate operation; In addition, the laboratory is generally tested CA mortar 30min fluidity loss (30min fluidity and initial flow degree poor) and is weighed the heat resistance of CA mortar with this according to the cement asphalt mortar slump test method of " the provisional technical conditions of passenger dedicated railway line CRTS II type plate type unballasted track cement emulsified bitumen mortar ", but owing to can't simulate the environment of the high temperature in working-yard, the judgement conclusion that provides sometimes and the state of working-yard greatly differ from each other.Therefore existing method can't accurately be assessed the heat resistance of CA mortar mixture, the present invention is intended to propose scientific and reasonable detection and evaluation measures at the heat resistance of CA mortar, and this measure will help to promote the research work of CA mortar material and the engineering of non-fragment orbit is used.
Summary of the invention
Technical matters: the present invention is directed to above-mentioned technological gap, a kind of detection method that is applicable to plate-type ballastless track with CA mortar mixture heat resistance is provided, it can overcome the deficiency that existing detection technique exists, and rationally detects and assess plate-type ballastless track CA mortar mixture heat resistance.
Described plate-type ballastless track with the detection step of CA mortar mixture heat resistance method for testing and detecting is:
The preparation of a.CA mortar mixture: all materials are placed stirring in the agitated kettle, obtain CA mortar mixture;
The mensuration of b.CA mortar mixture initial flow degree: the initial flow degree T that measures the 1LCA mortar with the fluidity analyzer
1
C.CA mortar mixture through the time preserve: the CA mortar mixture after will having surveyed the initial flow degree is packed into and is sealed in the container;
The mensuration of d.CA mortar mixture 30min fluidity: according to the fluidity T behind the described method test of the b 1LCA mortar mixture 30min
2
E.CA mortar mixture heat resistance is judged: T
2During≤300s, heat resistance is the I level, and T
2-T
1More little, heat resistance is good more; T
1＜300s and T
2During 〉=300s, heat resistance is judged in conjunction with the vertical degree of depth of sinking: the degree of depth 〉=75mm that vertically sink, and heat resistance is the II level; 30mm＜the degree of depth＜the 75mm that vertically sink, heat resistance is the III level; The sagging degree of depth≤30mm, heat resistance is the IV level; T
1〉=300s, heat resistance is the V level, the degree of depth of wherein vertically sinking is meant test T
2The time, 1LCA mortar mixture places the liquid level elemental height H in the used fluidity analyzer
1The liquid level H of residual CA mortar mixture in the fluidity analyzer when reaching 300s with the fluidity test duration
2Difference H
1-H
2
Described fluidity analyzer should meet the emulsified asphalt of " the provisional technical conditions of passenger dedicated railway line CRTS II type plate type unballasted track cement emulsified bitumen mortar " and the relevant regulations of cement adaptability test method.The above-mentioned test vertically concrete steps of the sagging degree of depth can be test T
2The time, 1LCA mortar mixture is placed in the used fluidity analyzer, treat that liquid level is static after, the height H of test fluid identity distance fluidity analyzer bottom
1, begin to test T then
2, record 1LCA mortar mixture all flows out the required time in the fluidity analyzer, works as T
2During 〉=300s, during recording test time (from fluidity analyzer in flow out pick up counting from 1LCA mortar mixture)=300s, the liquid level of residual CA mortar mixture is apart from the height H of fluidity analyzer bottom in the fluidity analyzer
2, calculate H
1-H
2, promptly obtain vertically sinking the degree of depth.Obviously, as long as H
1, H
2Reference field identical, no matter be that bottom with the fluidity analyzer is reference field or is reference field with the surface level, can not influence the concrete numerical value of the vertical degree of depth of sinking.
As preferred version, the detection step is:
The preparation of a.CA mortar mixture: all materials are heated to assigned temperature ± 1 ℃, place temperature to be higher than in the insulated and stirred pot of 1～3 ℃ of assigned temperature and stir, obtain CA mortar mixture;
The mensuration of b.CA mortar mixture initial flow degree: adopt insulation fluidity analyzer to measure the initial flow degree T of CA mortar
1, the design temperature of insulation fluidity tester is higher 1～3 ℃ than assigned temperature;
C.CA mortar mixture through time insulation: the CA mortar mixture after will having surveyed the initial flow degree is packed into and is sealed in the container, is taking out after being incubated 30min under the environment that is higher than 1～3 ℃ of assigned temperature;
The mensuration of d.CA mortar mixture 30min fluidity: according to the fluidity T behind the described method test of the b CA mortar mixture 30min
2
E.CA mortar mixture heat resistance is judged.
The present invention is according to T
1, T
2And the heat resistance of the vertical degree of depth synthetic determination CA mortar mixture that sink, can rationally detect and assess plate-type ballastless track CA mortar mixture heat resistance, the temperature of the assigned temperature working-yard when wherein testing.
Adopt above-mentioned preferred version, can significantly reduce the thermal loss of CA mortar in preparation and performance test process, reasonably simulate the serviceability of CA mortar mixture under hot conditions.
Described insulated and stirred pot is made up of the heat-insulation layer in the agitated kettle body and the agitated kettle body outside, and described insulation fluidity analyzer is made up of the heat-insulation layer in the fluidity analyzer body and the fluidity analyzer body outside.
The heat-insulation layer top of insulated and stirred pot is no more than 5cm apart from the pot mouth of agitated kettle body; The vertical height that portion is chewed apart from fluidity analyzer body in the heat-insulation layer top of insulation fluidity analyzer is not less than 250mm, and the vertical height that portion is chewed apart from fluidity analyzer body in the bottom of insulation fluidity analyzer heat-insulation layer is not less than the zone of 50mm.
Described heat-insulation layer is preferably Controllable Temperature electrical heat tracing layer, can further reduce the thermal loss of CA mortar in the heat resistance test process, reasonably simulates the serviceability of CA mortar mixture under hot conditions.
Measure 1L CA mortar mixture among step b and the d and from insulation fluidity tester, flow out the fluidity of used time, T as the CA mortar
2During≤300s, heat resistance is the I level, and T
2-T
1More little, heat resistance is good more; T
1＜300s and T
2During 〉=300s, heat resistance is judged in conjunction with the vertical degree of depth of sinking: the degree of depth 〉=75mm that vertically sink, and heat resistance is the II level; 30mm＜the degree of depth＜the 75mm that vertically sink, heat resistance is the III level; The sagging degree of depth≤30mm, heat resistance is the IV level; T
1〉=300s, heat resistance is the V level.Specifically as shown in table 1.
Table 1CA mortar temperature tolerance rank
Above-mentioned temperature tolerance rank can be used for the site operation risk assessment, guiding construction:
I level: do not influence construction, can irritate the plate operation according to plan;
II level: can construct, but suggestion is shortened the transhipment time with accelerating construction progress;
III level: may influence construction, preferably shorten the transhipment time with accelerating construction progress;
The IV level: the possibility of influence construction is very big, must adjust match ratio, detects and can construct after qualified;
V level: have a strong impact on construction, stop construction operation immediately.
It should be noted that, when carrying out CA mortar mixture heat resistance contrast test, must with target CA mortar be controlled at close scope (both differ and are no more than 5s) with reference to the initial flow degree of CA mortar, be in same rank if temperature tolerance is judged, then press the judgement of table 1 remarks column clause.
Description of drawings
Fig. 1 is an insulated and stirred pot section structure synoptic diagram, and 1 is the agitated kettle body, and 2 is heat-insulation layer, 3 Controllable Temperature electric heating layers, and 4 is thermofin.
Fig. 2 is an insulation fluidity analyzer section structure synoptic diagram, and 5 is fluidity analyzer body, and 6 is heat-insulation layer, and 7 is the Controllable Temperature electric heating layer, and 8 is thermofin.
Embodiment
In following examples, the insulated and stirred pot meets the relevant regulations of JCT 681-1997 " planetary cement plaster blender " standard.Insulation fluidity analyzer meets the emulsified asphalt of " the provisional technical conditions of passenger dedicated railway line CRTS II type plate type unballasted track cement emulsified bitumen mortar " and the relevant regulations of cement adaptability test method.Measure 1L CA mortar mixture and from insulation fluidity tester, flow out the fluidity of used time as the CA mortar.
As depicted in figs. 1 and 2, described insulated and stirred pot is made up of the heat-insulation layer 2 in the agitated kettle body 1 and agitated kettle body 1 outside, and heat-insulation layer 2 tops of insulated and stirred pot are no more than 5cm apart from the pot mouth of agitated kettle body 1; Described insulation fluidity analyzer is made up of the heat-insulation layer 6 in the fluidity analyzer body 5 and fluidity analyzer body 5 outsides; The vertical height that portion 9 is chewed apart from fluidity analyzer body in heat-insulation layer 6 tops of insulation fluidity analyzer is not less than 250mm, and the vertical height that portion 9 is chewed apart from fluidity analyzer body in the bottom of insulation fluidity analyzer heat-insulation layer 6 is not less than the zone of 50mm.Heat-insulation layer 2,6 is made up of the thermofin 4,8 in the Controllable Temperature electric heating layer 3,7 and the outside.
Example 1:
The CA mortar mix ratio is: 550 parts of cement, and 240 parts of emulsified asphalts, 900 parts of fine sands, 185 parts in water, 1.0 parts of water reducers, 0.1 part of defoamer detects its heat resistance at 37 ℃.
Insulated and stirred pot heat-insulation layer design temperature is 40 ℃, emulsified asphalt, water, water reducer and defoamer add in the insulated and stirred pot after the weighing in proportion and are incubated, cement and fine sand are weighed in proportion and be placed on temperature is 40 ℃ baking oven, mix stirring when treating both temperature stabilizations, stir 4min earlier fast, stir 1min then at a slow speed, actual measurement CA mortar mixture temperature is 36.5 ℃ during discharging.Insulation fluidity analyzer temperature is set at 40 ℃, and the CA mortar that mixes injects insulation fluidity analyzer, and recording the initial flow degree is 105s.Behind 40 ℃ of baking oven insulation 30min, take out, 38 ℃ of observed temperatures, recording CA mortar mixture 30min fluidity is 186s.Then this CA mortar is the I level in 37 on ℃ following heat resistances.
Example 2:
Contrast is by the heat resistance of CA mortar under 37 ℃ of environment of the cement production of two kinds of different cultivars.
600 parts of match ratio 1:1# cement, 240 parts of emulsified asphalts, 900 parts of fine sands, 195 parts in water, 1.2 parts of water reducers, defoamer, 0.1 part
600 parts of match ratio 2:2# cement, 240 parts of emulsified asphalts, 900 parts of fine sands, 205 parts in water, 1.2 parts of water reducers, defoamer, 0.1 part
Insulated and stirred pot, baking oven and insulation fluidity analyzer design temperature all are made as 40 ℃.Respectively emulsified asphalt, water, defoamer are placed the insulation of insulated and stirred pot, fine sand and cement mixing evenly are placed in the baking oven, treat to mix stirring behind both temperature stabilizations, stir 4min fast, stir 1min at a slow speed, match ratio 1 observed temperature is 36 ℃ during discharging, 35 ℃ of match ratio 2 observed temperatures; With insulation fluidity analyzer analyzer initial flow degree, be respectively 101s and 97s; Be placed on 30min in the baking oven with the plastic cylinder sealing, two mortar observed temperatures are respectively 37.5 ℃ and 36.5 ℃ during taking-up; Take out the back and measure its 30min fluidity with insulation fluidity analyzer, match ratio 1 is 147s, and 2 times of match ratio surpass 300s, and the vertically sagging degree of depth 47mm of mortar judges that thus the CA mortar temperature tolerance of match ratio 1 is the I level, and match ratio 2 is the III level.Also explanation simultaneously, 1# cement has the better temperature resistance energy than 2# cement.
Example 3:
Contrast is by the heat resistance of CA mortar under 38 ℃ of environment of the emulsified asphalt preparation of two kinds of different cultivars.
240 parts of match ratio 1:1# emulsified asphalts, 600 parts of cement, 900 parts of fine sands, 196 parts in water, 1.2 parts of water reducers, defoamer, 0.1 part
240 parts of match ratio 2:2# emulsified asphalts, 600 parts of cement, 900 parts of fine sands, 192 parts in water, 1.2 parts of water reducers, defoamer, 0.1 part
Insulated and stirred pot, baking oven and insulation fluidity analyzer design temperature all are made as 41 ℃.Respectively emulsified asphalt, water, defoamer are placed the insulation of insulated and stirred pot, fine sand and cement mixing evenly are placed in the baking oven, treat to mix stirring behind both temperature stabilizations, stir 4min fast, stir 1min at a slow speed, match ratio 1 observed temperature is 37 ℃ during discharging, 38 ℃ of match ratio 2 observed temperatures; With insulation fluidity analyzer analyzer initial flow degree, be respectively 101s and 105s; Be placed on 30min in the baking oven with the plastic cylinder sealing, two mortar observed temperatures are respectively 38 ℃ and 38.5 ℃ during taking-up; Take out the back and measure its 30min fluidity with insulation fluidity analyzer, match ratio 1 is 139s, 2 times of match ratio surpass 154, the CA mortar temperature tolerance of judging two match ratios thus is the I level, match ratio 1 mobile loss is 38s, 2 of match ratios are 49s, illustrate that the former temperature tolerance is slightly better than the latter.Also explanation simultaneously, the 1# emulsified asphalt has the better temperature resistance energy than 2# emulsified asphalt.
For a better understanding of the present invention, further illustrate content of the present invention below in conjunction with engineering site construction embodiment:
Example 4:
Environment and execution conditions:
35 ℃ of working-yard temperature, the transhipment of CA mortar adopts the mode of fork truck and crane combination to carry out, and estimates about 15min of transhipment time, and the CA mortar of assessing specified mix under this environment, the execution conditions is irritated the risk of plate operation;
Construction match ratio: 250 parts of emulsified asphalts, 600 parts of cement, 900 parts of fine sands, 210 parts in water, 1.2 parts of water reducers, 0.1 part of defoamer.
The laboratory heat resistance detects:
Insulated and stirred pot, baking oven and insulation fluidity analyzer design temperature all are made as 38 ℃.Respectively emulsified asphalt, water, defoamer are placed the insulation of insulated and stirred pot, fine sand and cement mixing evenly are placed in the baking oven, treat to mix stirring behind both temperature stabilizations, stir 4min fast, stir 1min at a slow speed, and the mortar observed temperature is 36 ℃ during discharging; Recording the initial flow degree with insulation fluidity analyzer analyzer is 124s; Be placed on 30min in the baking oven with the plastic cylinder sealing, the mortar observed temperature is respectively 37 ℃ during taking-up; Record its 30min fluidity 168s with insulation fluidity analyzer after taking out, mobile loss is 44s, judges that thus the CA mortar temperature tolerance of this match ratio is the I level, and filling plate operating risk is very little, therefore can irritate the plate operation.
Irritate the plate operation:
Produce CA mortar 0.6 side with this match ratio, 38 ℃ of drop temperatures, transhipment time 13min consuming time observes in four jiaos of vent ports of track plate behind the filling plate activity duration 90s and overflows mortar successively, irritates the plate operation and finishes smoothly.
Example 5:
Environment and execution conditions:
37 ℃ of working-yard temperature, hang the mode of sending and carry out the side of the direct employing of CA mortar transhipment crane, estimates about 8min of transhipment time, and the CA mortar of assessing specified mix under this environment, the execution conditions is irritated the risk of plate operation;
Construction match ratio: 240 parts of emulsified asphalts, 550 parts of cement, 900 parts of fine sands, 200 parts in water, 1.2 parts of water reducers, 0.1 part of defoamer
The laboratory heat resistance detects:
Insulated and stirred pot, baking oven and insulation fluidity analyzer design temperature all are made as 40 ℃.Respectively emulsified asphalt, water, defoamer are placed the insulation of insulated and stirred pot, fine sand and cement mixing evenly are placed in the baking oven, treat to mix stirring behind both temperature stabilizations, stir 4min fast, stir 1min at a slow speed, and the mortar observed temperature is 37 ℃ during discharging; Recording the initial flow degree with insulation fluidity analyzer analyzer is 223s; Be placed on 30min in the baking oven with the plastic cylinder sealing, the mortar observed temperature is respectively 38 ℃ during taking-up; Take out the back and record its 30min fluidity above 300s with insulation fluidity analyzer, and fail all to have flowed, the vertically sagging degree of depth of mortar is 28mm in the mensuration insulation fluidity analyzer, judges that thus the CA mortar temperature tolerance of this match ratio is the IV level, and filling plate operating risk is bigger.Construct with this match ratio, two kinds of situations may occur: (1) can finish during construction and irritate the plate operation if the transhipment time is short, and does not influence filling plate quality, can be very long but irritate the plate activity duration; (2) if the transhipment time is longer, the CA mortar may cause because of fluidity is too small and can't pour in the filling plate process.Suggestion is irritated the plate operation after adjusting match ratio again.
Example 6:
Environment and execution conditions:
CA mortar mix ratio in the example 5 is adjusted, and mainly is that water consumption and additive consumption are adjusted, and specifically is adjusted into: 240 parts of emulsified asphalts, 550 parts of cement, 900 parts of fine sands, 210 parts in water, 1.4 parts of water reducers, 0.1 part of defoamer carries out the heat resistance assessment again.
The laboratory heat resistance detects:
Insulated and stirred pot, baking oven and insulation fluidity analyzer design temperature all are made as 40 ℃.Respectively emulsified asphalt, water, defoamer are placed the insulation of insulated and stirred pot, fine sand and cement mixing evenly are placed in the baking oven, treat to mix stirring behind both temperature stabilizations, stir 4min fast, stir 1min at a slow speed, and the mortar observed temperature is 36 ℃ during discharging; Recording the initial flow degree with insulation fluidity analyzer analyzer is 157s; Be placed on 30min in the baking oven with the plastic cylinder sealing, the mortar observed temperature is respectively 37 ℃ during taking-up; Take out the back and record its 30min fluidity above 300s with insulation fluidity analyzer, and the CA mortar in the insulation fluidity analyzer can flow substantially, mortar vertically sink the degree of depth above 75mm, judge that thus the CA mortar temperature tolerance after the adjustment match ratio is the II level, it is less to irritate the plate operating risk, shortens the transhipment time when plate operation is irritated in suggestion to reduce the loss of CA mortar fluidity.
Irritate the plate operation
Produce CA mortar 0.6 side with adjusted match ratio, 40 ℃ of drop temperatures, transhipment time 6min consuming time observes in four jiaos of vent ports of track plate behind the filling plate activity duration 185s and overflows mortar successively, irritates the plate operation and finishes.
Claims (5)
1. plate-type ballastless track is with CA mortar mixture heat resistance method for testing and detecting, it is characterized in that detecting step and is:
The preparation of a.CA mortar mixture: all materials are placed stirring in the agitated kettle, obtain CA mortar mixture;
The mensuration of b.CA mortar mixture initial flow degree: the initial flow degree T that measures the 1LCA mortar with the fluidity analyzer
1
C.CA mortar mixture through the time preserve: the CA mortar mixture after will having surveyed the initial flow degree is packed into and is sealed in the container;
The mensuration of d.CA mortar mixture 30min fluidity: according to the fluidity T behind the described method test of the b 1LCA mortar mixture 30min
2
E.CA mortar mixture heat resistance is judged: T
2During≤300s, heat resistance is the I level, and T
2-T
1More little, heat resistance is good more; T
1＜300s and T
2During 〉=300s, heat resistance is judged in conjunction with the vertical degree of depth of sinking: the degree of depth 〉=75mm that vertically sink, and heat resistance is the II level; 30mm＜the degree of depth＜the 75mm that vertically sink, heat resistance is the III level; The sagging degree of depth≤30mm, heat resistance is the IV level; T
1〉=300s, heat resistance is the V level, the degree of depth of wherein vertically sinking is meant test T
2The time, 1LCA mortar mixture places the liquid level elemental height H in the used fluidity analyzer
1The liquid level H of residual CA mortar mixture in the fluidity analyzer when reaching 300s with the fluidity test duration
2Difference H
1-H
2
2. plate-type ballastless track as claimed in claim 1 is with CA mortar mixture heat resistance method for testing and detecting, it is characterized in that detecting step to be:
The preparation of a.CA mortar mixture: all materials are heated to assigned temperature ± 1 ℃, place temperature to be higher than in the insulated and stirred pot of specifying 1～3 ℃ of test temperature and stir, obtain CA mortar mixture;
The mensuration of b.CA mortar mixture initial flow degree: adopt insulation fluidity analyzer to measure the initial flow degree T of CA mortar
1, the design temperature of insulation fluidity tester is higher 1～3 ℃ than assigned temperature;
C.CA mortar mixture through time insulation: the CA mortar mixture after will having surveyed the initial flow degree is packed into and is sealed in the container, is taking out after being incubated 30min under the environment that is higher than 1～3 ℃ of assigned temperature;
The mensuration of d.CA mortar mixture 30min fluidity: according to the fluidity T behind the described method test of the b CA mortar mixture 30min
2
E.CA mortar mixture heat resistance is judged.
3. plate-type ballastless track as claimed in claim 2 CA mortar mixture heat resistance method for testing and detecting, it is characterized in that described insulated and stirred pot is made up of the heat-insulation layer in agitated kettle body and the agitated kettle body outside, described insulation fluidity analyzer is made up of the heat-insulation layer outside fluidity analyzer body and the fluidity analyzer body.
4. plate-type ballastless track as claimed in claim 3 is with CA mortar mixture heat resistance method for testing and detecting, it is characterized in that heat-insulation layer top on the insulated and stirred pot is no more than 5cm apart from the pot mouth of agitated kettle body; The vertical height that portion is chewed apart from fluidity analyzer body in insulation fluidity analyzer heat-insulation layer top is not less than 250mm, and the vertical height that portion is chewed apart from fluidity analyzer body in insulation fluidity analyzer heat-insulation layer bottom is not less than the zone of 50mm.
5. as claim 3 or 4 described plate-type ballastless tracks CA mortar mixture heat resistance method for testing and detecting, it is characterized in that described heat-insulation layer is a Controllable Temperature electrical heat tracing layer.
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| CN109030049A (en) * | 2018-07-16 | 2018-12-18 | 北京交通大学 | A kind of ballastless track of high-speed railway complex environment simulation experiment system |
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| CN102288630B (en) | 2012-11-21 |
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