CN108656328A - The steaming pressuring curing process of fiber cement board - Google Patents
The steaming pressuring curing process of fiber cement board Download PDFInfo
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- CN108656328A CN108656328A CN201710186669.8A CN201710186669A CN108656328A CN 108656328 A CN108656328 A CN 108656328A CN 201710186669 A CN201710186669 A CN 201710186669A CN 108656328 A CN108656328 A CN 108656328A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses the steaming pressuring curing process of fiber cement board, include the following steps：Under 0Pa pressure, steam pressure temperature is risen to 100 DEG C by 0 DEG C；Within the first period, divides 2 times and raise simultaneously steam pressure temperature and steam pressure pressure, steam pressure temperature is risen into the first steam pressure temperature by 100 DEG C, steam pressure pressure is risen into the first steam pressure pressure by 0Pa；Within the second period, the first steam pressure temperature and the first steam pressure pressure are kept, carries out steam pressure；Within the third period, divide 2 times reduces steam pressure temperature and steam pressure pressure simultaneously, restores steam pressure temperature to 100 DEG C, restores steam pressure pressure to 0Pa.Beneficial effects of the present invention are：Heating/cooling is carried out by timesharing intermediate node and strictly controls each node steam pressure temperature and steam pressure pressure, so that the two is matched, is reduced the crumbly coefficient of cement, reduce the probability of cement plate crackle, provide the production qualification rate of fiber cement board significantly.
Description
Technical field
The present invention relates to a kind of steaming pressuring curing process of fiber cement board.
Background technology
Fiber cement outer wall hanging plate is a kind of novel green energy-saving building materials, and it is vertical to be widely used in external wall
Face, it is more demanding to plank resisting wind press capacity as exterior wall cladding, therefore plank of delivering must satisfy requirement.Cement products
Intensity is to determine that the reaction time is longer by the hydration reaction degree of cement, and intensity is higher, therefore general cement exterior wall cladding
After wet embryo is made, natural curing could deliver after 28 days, leverage production delivery process.
Currently, some factories promote the hydration reaction of cement by way of still kettle high temperature steam curing, it is big in this way
Big shortens delivery date, improves production efficiency.But it is not perfect due to steam pressure technique, lead to the plate come out from still kettle
Material crack number is more, greatly reduces production qualification rate.
Invention content
Present invention seek to address that problem as described above.The present invention provides a kind of steaming pressuring curing process of fiber cement board.
When carrying out steam press maintenance to cement fibrolite plate using still kettle, existing technology usually can be by controlling normal pressure
When (temperature is at 100 DEG C or less) still kettle in steam pressure temperature increase rate, (temperature is higher than 100 DEG C or more when high pressure
When) heating rate, the constant temperature and pressure time, temperature fall time after constant temperature and pressure etc. is because of the fiber cement board after usually ensureing maintenance
Mechanical strength, still, the research about above each factor only rests on the experimental stage, that is, gives theoretical research
Value range has no the specific value of the specific each factor that can be applied to actual production, and which results in actual production
In, due to coarse steam pressure technique, frequently results in the fiber cement board after maintenance and a large amount of fracture occur, affect production effect
Rate.
In order to solve the above problem, the present invention provides the steaming pressuring curing process of perfect fiber cement board, specifically include with
Lower step：
(1) under 0Pa pressure, steam pressure temperature is risen to 100 DEG C by 0 DEG C；
(2) within the first period, divide 2 times and raise simultaneously steam pressure temperature and steam pressure pressure, steam pressure temperature is risen to by 100 DEG C
Steam pressure pressure is risen to the first steam pressure pressure by the first steam pressure temperature by 0Pa；
(3) within the second period, the first steam pressure temperature and the first steam pressure pressure are kept, carries out steam pressure；
(4) within the third period, steam pressure temperature and steam pressure pressure are reduced simultaneously points for 2 times, restore steam pressure temperature to 100 DEG C,
Restore steam pressure pressure to 0Pa.
Wherein, the first period was 60~80min, and the second period was 8~10h, 110~140min of third period；First steams
It is 140~175 DEG C to press temperature, and the first steam pressure pressure is 0.4~0.75MPa.
Wherein, the first period was 72min, and the second period was 9h, third period 127min；First steam pressure temperature is 161 DEG C,
First steam pressure pressure is 0.63MPa.
Wherein, step (1) includes：Under 0Pa pressure, in 50~75min, steam pressure temperature is risen to 100 DEG C for 0 DEG C.
Wherein, step (1) includes：Under 0Pa pressure, in 66min, steam pressure temperature is risen to 100 DEG C for 0 DEG C.
Wherein, step (2) includes：Within the 4th period, steam pressure temperature is first risen into the second steam pressure temperature by 100 DEG C, together
When steam pressure pressure risen into the second steam pressure pressure by 0Pa, within the 5th period, be further continued for increasing the second steam pressure temperature and steam to first
Temperature is pressed, raises simultaneously the second steam pressure pressure to the first steam pressure pressure；
Step (4) includes：Within the 6th period, the first steam pressure temperature to the second steam pressure temperature is first reduced, while reducing by the
One steam pressure pressure is to the second steam pressure pressure, within the 7th period, is further continued for reducing the second steam pressure temperature to 100 DEG C, reduces simultaneously
Second steam pressure pressure is to 0Pa.
Wherein, the 4th period be 30~50min, the 5th period be 20~35min, the 6th period be 60~75min, the 7th
Period is 50~70min；First steam pressure temperature is 140~175 DEG C, and the first steam pressure pressure is 0.4~0.75MPa, the second steam pressure
Temperature is 120~140 DEG C, and the second steam pressure pressure is 0.2~0.35MPa.
Wherein, the 4th period was 44min, and the 5th period was 28min, and the 6th period was 67min, and the 7th period was 60min；
First steam pressure temperature is 161 DEG C, and the first steam pressure pressure is 0.63MPa, and the second steam pressure temperature is 130 DEG C, and the second steam pressure pressure is
0.27MPa。
Fiber cement board is formed by basic material of cement, when aquation is dried using autoclave method, needs to set
Suitable heating and cooling rhythm, prevent due to the rising sharply of temperature, rapid drawdown because cement plate fracture, the present invention passes through a large amount of
Production practices are found, by the way that steam pressure temperature is divided into 2 stages raisings, is further divided into 2 stages reductions, can increased dry speed
While rate, gives cement enough hydration times, greatly reduce the fracture rate of cement plate.
In addition, speed of the present invention also by further controlling each stage steam pressure temperature and steam pressure pressure rise or reduction
Rate determines duration and the actual temp of each node, further reaches 95% or more in guarantee manufacture of cement qualification rate
While, the curing time of fiber cement board is shortened to the maximum extent, and curing time was foreshortened to by 28 days of natural curing
12~15 hours.
Beneficial effects of the present invention are：
1, cement plate wet embryo is shortened under the premise of ensureing fiber cement board intensity by the method for steam press maintenance
Maintenance processes foreshortened to curing time 12~15 hours by 28 days of natural curing.
2, heating/cooling is carried out by timesharing intermediate node and strictly controls each node steam pressure temperature and steam pressure pressure, made
The two matches, and reduces the crumbly coefficient of cement, reduces the probability of cement plate crackle, provides fiber cement board significantly
Produce qualification rate.
Being described below for exemplary embodiment is read with reference to the drawings, other property features of the invention and advantage will
It is apparent from.
Description of the drawings
It is incorporated into specification and the attached drawing of a part for constitution instruction shows the embodiment of the present invention, and with
Principle for explaining the present invention together is described.In the drawings, similar reference numeral is for indicating similar element.Under
Attached drawing in the description of face is some embodiments of the present invention, rather than whole embodiments.Those of ordinary skill in the art are come
It says, it without creative efforts, can be obtain other attached drawings according to these attached drawings.
Fig. 1 is the flow chart of the steaming pressuring curing process of the fiber cement board of embodiment.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.It needs
Illustrate, in the absence of conflict, the features in the embodiments and the embodiments of the present application mutually can be combined arbitrarily.
The basic thought of the present invention is that by raising and reducing steam pressure temperature and steam pressure pressure by several times, and strictly control is each
The increasing temperature and pressure in a stage/decrease temperature and pressure rate, shortens the production cycle of fiber cement board, while ensureing the fibre after steam press maintenance
Tie up the product qualification rate and mechanical performance of cement plate.
As shown in Figure 1, a kind of steaming pressuring curing process of fiber cement board, specifically includes following steps：
(1) under 0Pa pressure, steam pressure temperature is risen to 100 DEG C by 0 DEG C.
(2) within the first period, divide 2 times and raise simultaneously steam pressure temperature and steam pressure pressure, steam pressure temperature is risen to by 100 DEG C
Steam pressure pressure is risen to the first steam pressure pressure by the first steam pressure temperature by 0Pa.
(3) within the second period, the first steam pressure temperature and the first steam pressure pressure are kept, carries out steam pressure.
(4) within the third period, steam pressure temperature and steam pressure pressure are reduced simultaneously points for 2 times, restore steam pressure temperature to 100 DEG C,
Restore steam pressure pressure to 0Pa.
In above-mentioned steps, the present invention divides the increasing temperature and pressure process in high pressure phase (i.e. stage of the temperature higher than 100 DEG C)
It is carried out for 2 times, the decrease temperature and pressure stage after constant temperature and pressure is equally divided into 2 progress, reason for this is that increasing temperature and pressure energy
The intensity of enough quickly enhancing cement itself, but simultaneous increases the crumbly coefficient of cement, that is, cement fibrolite plate can be got over
Come more crisp, the rapid drawdown if temperature rises sharply is easy to cause and quickly expands with heat and contract with cold, to keep cement fibrolite plate chipping.
Wherein, the first period was 60~80min, and the second period steamed for 8~10h, 110~140min of third period, first
It is 140~175 DEG C to press temperature, and the first steam pressure pressure is 0.4~0.75MPa.
During steam pressure, the increase rate of the mechanical strength of cement fibrolite plate also with high pressure phase temperature, constant temperature and pressure
Time, decrease temperature and pressure rate has direct relation, also, the crumbly coefficient of cement fibrolite plate and the mechanical strength of cement fibrolite plate are in
Positive correlation, that is to say, that on the one hand need to keep enough mechanical strengths of cement plate, on the one hand need to control cement plate
Crumbly coefficient, prevented crisp, it is therefore desirable to select moderate warming temperature, boost pressure, increasing temperature and pressure rate, cooling temperature
Degree is depressured pressure, and rate of temperature fall, the constant temperature and pressure time, active force when being expanded with heat and contract with cold with cooperation in cement plate that is, cannot be excessive
Can not be too small, to prevent water mud fragmentation.
Specifically, in an effect preferably embodiment, the first period was 72min, and the second period was 9h, third period
127min；First steam pressure temperature is 161 DEG C, and the first steam pressure pressure is 0.63MPa.
Step (1) specifically includes：Under 0Pa pressure, in 50~75min, steam pressure temperature is risen to 100 DEG C for 0 DEG C.
Raising of the mechanical strength and crumbly coefficient of cement fibrolite plate also with atmospheric phase (temperature is 100 DEG C or less) temperature
Rate is related, therefore wants under the premise of keeping cement plate intensity enough, to reduce the brittleness of cement plate as small as possible, make it
The inertial forces that can bear the generation of expanding with heat and contract with cold of specific temperature and pressure, liter when rigid temperature being needed to rise to 100 by 0
The warm time.
In a preferred embodiment, the heating-up time of atmospheric phase is 66min.
Step (2) includes：Within the 4th period, steam pressure temperature is first risen into the second steam pressure temperature by 100 DEG C, while will steam
Pressure pressure rises to the second steam pressure pressure by 0Pa, within the 5th period, is further continued for increasing the second steam pressure temperature to the first steam pressure temperature
Degree, raises simultaneously the second steam pressure pressure to the first steam pressure pressure.
Step (4) includes：Within the 6th period, the first steam pressure temperature to the second steam pressure temperature is first reduced, while reducing by the
Two steam pressure pressure are to the first steam pressure pressure, within the 7th period, are further continued for reducing the first steam pressure temperature to 100 DEG C, reduce simultaneously
First steam pressure pressure is to 0Pa.
Under normal conditions, the temperature and pressure in the intermediate stage of high pressure phase, heating and boosting, can be with decrease temperature and pressure mistake
The temperature and pressure in journey intermediate stage is consistent, i.e., is simultaneously in the present invention the second steam pressure temperature and the second steam pressure pressure,
It can also be different from the medium temperature of decrease temperature and pressure process and intermediate pressure.
Such as：Step (2) includes：Within the 4th period, steam pressure temperature is first risen into the second steam pressure temperature by 100 DEG C, together
When steam pressure pressure risen into the second steam pressure pressure by 0Pa, within the 5th period, be further continued for increasing the second steam pressure temperature and steam to first
Temperature is pressed, raises simultaneously the second steam pressure pressure to the first steam pressure pressure.
Under the premise of this, step (4) may include：Within the 6th period, the first steam pressure temperature is first reduced to the second steaming
Temperature is pressed, while reducing the first steam pressure pressure to the second steam pressure pressure, within the 7th period, is further continued for reducing the second steam pressure temperature
To 100 DEG C, while the second steam pressure pressure is reduced to 0Pa.
Step (4) can also include：Within the 6th period, the first steam pressure temperature is first reduced to third steam pressure temperature, simultaneously
The second steam pressure pressure is reduced to third steam pressure pressure, within the 7th period, is further continued for reducing third steam pressure temperature to 100 DEG C, together
When reduce third steam pressure pressure to 0Pa.
Wherein, the 4th period was 30~50min, and the 5th period was 20~35min, and the 6th period was 60~75min, its
Period is 50~70min；First steam pressure temperature is 140~175 DEG C, and the first steam pressure pressure is 0.4~0.75MPa, the second steam pressure
Temperature is 120~140 DEG C, and the second steam pressure pressure is 0.2~0.35MPa, and third steam pressure temperature is 120~140 DEG C, third steam pressure
Pressure is 0.2~0.35MPa.
By strictly controlling time and the numberical range of above each node, the intensity of fiber cement board can be made and supporting naturally
The intensity of 28 days cement plates of shield is identical, meanwhile, ensure that the steam press maintenance qualification rate of fiber cement board reaches 95% or more.
Below by by the form of specific embodiment, the steam pressure for the fiber cement board that present invention be described in more detail is supported
Nurse's skill.
Embodiment one：The steaming pressuring curing process 1 of fiber cement board
Specifically include following steps：
(1) under 0Pa pressure, in 66min, steam pressure temperature is risen to 100 DEG C for 0 DEG C.
(2) in 44min, steam pressure temperature is first risen to 130 DEG C by 100 DEG C, while steam pressure pressure being risen to by 0Pa
0.27MPa is further continued for increasing steam pressure temperature to 161 DEG C, raises simultaneously steam pressure pressure to 0.63MPa in 28min.
(3) in 9h, kept for 161 DEG C and 0.63MPa carry out steam pressure.
(4) in 67min, temperature is first down to 130 DEG C by 161 DEG C, while pressure being reduced to by 0.63MPa
0.27MPa is further continued for reducing temperature to 100 DEG C, while reducing steam pressure pressure to 0Pa in 60min.
Embodiment two：The steaming pressuring curing process 1 of fiber cement board
(1) under 0Pa pressure, in 55min, steam pressure temperature is risen to 100 DEG C for 0 DEG C.
(2) in 35min, steam pressure temperature is first risen to 130 DEG C by 100 DEG C, while steam pressure pressure being risen to by 0Pa
0.30MPa is further continued for increasing steam pressure temperature to 170 DEG C, raises simultaneously steam pressure pressure to 0.70MPa in 30min.
(3) in 9h, kept for 170 DEG C and 0.70MPa carry out steam pressure.
(4) in 70min, temperature is first down to 135 DEG C by 170 DEG C, while pressure being reduced to by 0.70MPa
0.25MPa is further continued for reducing temperature to 100 DEG C, while reducing steam pressure pressure to 0Pa in 65min.
In conclusion beneficial effects of the present invention are：
1, cement plate wet embryo is shortened under the premise of ensureing fiber cement board intensity by the method for steam press maintenance
Maintenance processes foreshortened to curing time 12~15 hours by 28 days of natural curing.
2, heating/cooling is carried out by timesharing intermediate node and strictly controls each node steam pressure temperature and steam pressure pressure, made
The two matches, and reduces the crumbly coefficient of cement, reduces the probability of cement plate crackle, provides fiber cement board significantly
Produce qualification rate.
Descriptions above can combine implementation individually or in various ways, and these variants all exist
Within protection scope of the present invention.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of steaming pressuring curing process of fiber cement board, which is characterized in that include the following steps：
(1) under 0Pa pressure, steam pressure temperature is risen to 100 DEG C by 0 DEG C；
(2) within the first period, divide 2 times and raise simultaneously steam pressure temperature and steam pressure pressure, steam pressure temperature is risen to first by 100 DEG C
Steam pressure pressure is risen to the first steam pressure pressure by steam pressure temperature by 0Pa；
(3) within the second period, the first steam pressure temperature and the first steam pressure pressure are kept, carries out steam pressure；
(4) within the third period, divide 2 times reduces steam pressure temperature and steam pressure pressure simultaneously, restores steam pressure temperature to 100 DEG C, restores
Steam pressure pressure is to 0Pa.
2. steaming pressuring curing process as described in claim 1, which is characterized in that
First period is 60~80min, and second period is 8~10h, 110~140min of the third period；
The first steam pressure temperature is 140~175 DEG C, and the first steam pressure pressure is 0.4~0.75MPa.
3. steaming pressuring curing process as claimed in claim 2, which is characterized in that
First period is 72min, and second period is 9h, the third period 127min；
The first steam pressure temperature is 161 DEG C, and the first steam pressure pressure is 0.63MPa.
4. steaming pressuring curing process as described in claim 1, which is characterized in that the step (1) includes：
Under 0Pa pressure, in 50~75min, steam pressure temperature is risen to 100 DEG C for 0 DEG C.
5. steaming pressuring curing process as claimed in claim 4, which is characterized in that the step (1) includes：
Under 0Pa pressure, in 66min, steam pressure temperature is risen to 100 DEG C for 0 DEG C.
6. steaming pressuring curing process as described in claim 1, which is characterized in that the step (2) includes：
Within the 4th period, steam pressure temperature is first risen into the second steam pressure temperature by 100 DEG C, while steam pressure pressure being risen to by 0Pa
Second steam pressure pressure is further continued for increasing the second steam pressure temperature to the first steam pressure temperature, raises simultaneously the second steaming within the 5th period
Pressure pressure is to the first steam pressure pressure；
The step (4) includes：
Within the 6th period, the first steam pressure temperature to the second steam pressure temperature is first reduced, while reducing the first steam pressure pressure to second
Steam pressure pressure is further continued for reducing the second steam pressure temperature to 100 DEG C, while reducing the second steam pressure pressure extremely within the 7th period
0Pa。
7. steaming pressuring curing process as claimed in claim 6, which is characterized in that
4th period is 30~50min, and the 5th period is 20~35min, and the 6th period is 60~75min,
7th period is 50~70min；
The first steam pressure temperature is 140~175 DEG C, and the first steam pressure pressure is 0.4~0.75MPa, second steam pressure
Temperature is 120~140 DEG C, and the second steam pressure pressure is 0.2~0.35MPa.
8. steaming pressuring curing process as claimed in claim 7, which is characterized in that
4th period is 44min, and the 5th period is 28min, and the 6th period is 67min, the 7th period
For 60min；
The first steam pressure temperature is 161 DEG C, and the first steam pressure pressure is 0.63MPa, and the second steam pressure temperature is 130
DEG C, the second steam pressure pressure is 0.27MPa.
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| CN201710186669.8A CN108656328B (en) | 2017-03-27 | 2017-03-27 | The steaming pressuring curing process of fiber cement board |
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| CN201710186669.8A CN108656328B (en) | 2017-03-27 | 2017-03-27 | The steaming pressuring curing process of fiber cement board |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113045279A (en) * | 2021-02-26 | 2021-06-29 | 海南广胜新型建材有限公司 | Autoclaved sand-lime brick and preparation method thereof |
| CN116587409A (en) * | 2023-06-15 | 2023-08-15 | 江苏宇航板业有限公司 | Autoclaved curing method for calcium silicate slab |
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