CN109176851A - A kind of self-heating insulated curing system for railway concrete prefabricated components - Google Patents
A kind of self-heating insulated curing system for railway concrete prefabricated components Download PDFInfo
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- CN109176851A CN109176851A CN201811034817.5A CN201811034817A CN109176851A CN 109176851 A CN109176851 A CN 109176851A CN 201811034817 A CN201811034817 A CN 201811034817A CN 109176851 A CN109176851 A CN 109176851A
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- concrete
- heat
- prefabricated components
- self
- curing
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Classifications
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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
Abstract
The invention discloses a kind of self-heating insulated curing systems for railway concrete prefabricated components, the hydration heat of prefabricated components concrete itself is made full use of to be conserved, scattering and disappearing for concrete heat is reduced using keeping the temperature and reflecting heat technique, by the aquation for adding a certain amount of hydrated calcium silicate crystal seed and the early strong material excited cement of triethanolamine into concrete, accelerate concrete coagulation hardening in concrete hardening early stage, temperature in the adjustable curing pool of accumulation of heat water layer accelerates early concrete condensation hardening.The present invention has the characteristics that energy conservation and environmental protection, green low-carbon, economic cost are low, and is able to ascend the quality of railway concrete prefabricated components, replaces railway concrete prefabricated part steam curing, realizes non-evaporating feeding effect.
Description
Technical field
The invention belongs to railway concrete prefabricated components to manufacture field, design one kind for railway concrete prefabricated components
Effective self-heating insulated curing system, the heat which is released using concrete itself condensation hardening, it is pre- to eliminate concrete
Steam curing in component production processed, is applicable to the self-heating insulated curing of sleeper, track plates, tubular pole, is equally applicable to civilian
The insulated curing of building prefabricated components.
Background technique
The railway traffic infrastructure important as country, plays the important and pivotal role in the economic development of the country.
In order to ensure Environment in Railway Engineering Construction quality, save the cost, China largely uses prefabricated components in Environment in Railway Engineering Construction, and existing
Pouring concrete component is compared, concrete prefabricated element be batch production manufacture, prefabricated components production be protected from environmental it is small, have from
The features such as dynamicization, fining and integration degree is high, the quality of production is controllable and high production efficiency, currently, Environment in Railway Engineering Construction
In the simply supported beam, pre stressed concrete sleeper, track plates, tubular pole and the section of jurisdiction that largely use be prefabricated components.It is pre- in order to improve concrete
The turnover rate of element mold processed, improves production efficiency, and railway concrete prefabricated components are added frequently with steam-cured mode
Speed maintenance, shortens curing cycle, especially in northern China cold district, steam curing is that railway concrete prefabricated components are generally adopted
Maintenance method.A large amount of fossil fuels however, steam curing needs to burn release a large amount of sulfide and nitride, increase
Add environmental pollution, moreover, compared with natural curing, steam curing easily causes the hole on concrete members surface coarse, influences to mix
The long durability of Xtah Crude Clay structure, this has been reported that in existing research, in addition, steam curing also increase it is certain it is economical at
This.
This technology makes full use of the characteristics of railway prefabricated concrete members hydration reaction heat release, is put concrete by keeping the temperature
Heat out is stored in relatively closed space, reduces heat loss, hot using the finishing coat reflected radiation of insulation layer surface,
Concrete component temperature is improved, the hydration and hardening of prefabricated components concrete is accelerated；In addition, increasing accumulation of heat water in maintenance bottom of pond portion
Layer, so that when environment temperature is high, water energy enough absorbs thermmal storage heat, when concrete prefabricated element early stage hydrated cementitious is slow,
The heat of accumulation of heat water layer releases heating concrete, accelerates the aquation of concrete, improves the temperature rise of concrete, in addition, accumulation of heat
The humidity that the moisture of water layer increases environment can also achieve the purpose that moisture conserves；In addition, in order to improve the early stage of concrete
Hydration heat rate adds a certain amount of hydrated calcium silicate seed crystal material into concrete, accelerates the aquation of concrete, that is, realize
Heating curing is carried out using prefabricated components concrete self-heat generation to replace non-evaporating feeding purpose.
Summary of the invention
The purpose of the present invention is to provide a kind of self-heating insulated curing system of railway concrete prefabricated components, which exists
Spring, summer, fall and winter can be used, and carry out accelerating the condensation of concrete hard using concrete itself hydration heat
Change, achievees the purpose that non-evaporating feeding.
To achieve the goals above, the present invention adopts the following technical scheme that, a kind of for railway concrete prefabricated components
Self-heating insulated curing system, is made of following step.
(1) self-heating insulated curing system ecto-entad is followed successively by reinforced concrete floor, polyurethane water-proof layer, gathers in curing pool
Urethane insulating layer, finishing coat, bottom are laid with polymer reinforced concrete structure waterproof layer, and top is movable polyurethane heat-insulation top
Lid.
(2) maintenance bottom of pond portion is the accumulation of heat water layer of 50cm thickness, and accumulation of heat water layer conserves early stage releasing heat, dimension in prefabricated components
The temperature in curing pool is held, the aquation of prefabricated components concrete is accelerated, absorbs the heat that prefabricated components are released in the maintenance later period；It stores
The evaporation of hot water layer's moisture keeps the moisture stable in curing pool, realizes the moisture maintenance of prefabricated components.
(3) the hydrated calcium silicate seed crystal material that 5% ~ 10% is added in prefabricated components concrete, accelerates prefabricated components concrete
Early hydration hardening rate.
(4) after the railway concrete prefabricated components after completing are put into curing pool, insulated roof is covered, is made full use of pre-
The heat of component release processed is conserved.
(5) when railway prefabricated concrete members compression strength reaches design strength, top cover is opened, is demoulded.
The self-heating insulated curing system, polyurethane insulation coating are to spray, and with a thickness of 8cm ~ 12cm, density is
30kg/m3~70kg/m3, thermal coefficient is less than 0.02W/ (m.K).
The self-heating insulated curing system, finishing coat are the one or more of masking foil, aluminium-foil paper and glass reinforced plastic.
The self-heating insulated curing system, polymer emulsion material is water in polymer reinforced concrete structure waterproof layer
The 10% ~ 15% of mud, waterproofing layer thickness 10cm, concrete intermediate arrangementφThe reinforced mesh of 8mm.
The self-heating insulated curing system, accumulation of heat water layer is as energy storage material, in water by extra heat storage,
It is released in the concrete prefabricated element maintenance of the second layer.
The self-heating insulated curing system, 5% ~ 10% hydrated calcium silicate is added in concrete, and hydrated calcium silicate is early strong
Material promotes hydrated cementitious heat release, and the calcium silicon ratio of hydrated calcium silicate is 1.2:1 ~ 3:1, and the partial size of hydrated calcium silicate is not more than 5 μ
m。
The self-heating insulated curing system, the heat for making full use of concrete autoreactivity to release, utilizes polyurethane
Heat insulation function keeps the temperature the heat of release, reduces the temperature gradient of prefabricated components concrete, and carry out accumulation of heat using water, further
Accelerate the hydration and hardening of concrete, improves early strength.
The railway concrete prefabricated components self-heating insulated curing system, is conserved by concrete self-heat generation,
Instead of steam curing, above system can realize that temperature is that 40 DEG C ~ 50 DEG C temperature are adjustable in insulated building, and soaking time is greater than 48h.
The railway concrete prefabricated components self-heating insulated curing system, be applicable to sleeper, track plates, section of jurisdiction from
Hot insulated curing is equally applicable to the heating and thermal insulation maintenance of civil buildings prefabricated components.
Invention feature and principle
The present invention needs steam-cured status for existing railway concrete prefabricated components, proposes a kind of for railway coagulation
The self-heating insulated curing system of native prefabricated components, this system obviates steam curings to need combustion of fossil fuels, and steam curing
The problem of haveing damage to concrete makes full use of the hydration heat of concrete coagulation itself to be conserved；By accumulation of heat water layer, dimension
The temperature in support ring border, meanwhile, the early hydration that a certain amount of hydrated calcium silicate seed crystal material improves concrete is added, in cold
Winter can realize that the non-evaporating of prefabricated components is supported.
Key problem in technology of the invention is the self-heat generation for making full use of concrete, replaces external heat steam curing.Technology is arranged
It applies including three parts, the comprehensive use in these three parts can realize that autogenous curing replaces steam-cured purpose.
(1) concrete hydrating reaction can release big calorimetric, concrete itself aquation core temperature can achieve 50 DEG C with
On, this partial heat is very considerable, the exothermic loss of concrete is reduced using the technology of heat preservation and heat reflection, by heat
It is converted into the raising of environment temperature, the condensation of concrete is accelerated to harden.
(2) to maintain the temperature in curing pool, the temperature of early stage prefabricated components concrete is improved, the condensation of concrete is accelerated
Hardening adjusts the temperature in curing pool with accumulation of heat water, the replacement of water is also more convenient, this germline using water as heat-storing material
System was not only economical but also effective.
(3) in order to excite the condensation of concrete to harden as early as possible, hydrated calcium silicate crystal seed is added into prefabricated components concrete
And triethanolamine, the two add the effect for occurring mutually promoting simultaneously, further speed up hydration heat, improve the temperature of concrete
It rises.
In conclusion the present invention has rational design, easy to use and operate, energy-saving and emission-reduction, economic cost is low, and is able to ascend iron
The quality of road concrete prefabricated element both can be suitably used for the production of the small-sized prefabricated members such as sleeper, track plates and section of jurisdiction, can also use
In the production of tubular pole, industry and other prefabricated components of civil buildings are similarly able to use.
Detailed description of the invention
Fig. 1 is prefabricated components self-heating insulated curing system schematic
Description of symbols:
1 --- insulated roof, 2 --- prefabricated components, 3 --- finishing coat, 4 --- bearing beam, 5 --- accumulation of heat water layer, 6 --- reinforcing bar
Concrete, 7 --- polyurethane water-proof layer, 8 --- polyurethane insulation coating.
Specific embodiment
Embodiment 1:
A kind of self-heating insulated curing system for railway concrete pre-stress rail plate, feature are as follows.
(1) self-heating insulated curing system ecto-entad is followed successively by reinforced concrete floor, polyurethane water-proof layer, gathers in curing pool
Urethane insulating layer, aluminium foil heat-reflecting layer, bottom are laid with polymer reinforced concrete structure waterproof layer, and top is that movable polyurethane is protected
Warm top cover.
(2) maintenance bottom of pond portion is the accumulation of heat water layer of 50cm thickness, and accumulation of heat water layer conserves early stage releasing heat, dimension in prefabricated components
The temperature in curing pool is held, the aquation of prefabricated components concrete is accelerated, absorbs the heat that prefabricated components are released in the maintenance later period；It stores
The evaporation of hot water layer's moisture keeps the moisture stable in curing pool, realizes the moisture maintenance of prefabricated components.
(3) the hydrated calcium silicate seed crystal material for accounting for cement consumption 8% is added in prefabricated components concrete.
(4) after the railway concrete pre-stress rail plate of forming being put into curing pool, insulated roof is covered, concrete enters
Curing pool temperature is 16 DEG C.
(5) when conserving 16h in curing pool, temperature is 43 DEG C in curing pool, concrete crushing strength 40MPa；It is same to match
It is 45MPa than 45 DEG C of steam curing of concrete compression strength of identical age.
Embodiment 2:
A kind of self-heating insulated curing system for railway concrete pre-stress rail plate, feature are as follows.
(1) self-heating insulated curing system ecto-entad is followed successively by reinforced concrete floor, polyurethane water-proof layer, gathers in curing pool
Urethane insulating layer, aluminium foil heat-reflecting layer, bottom are laid with polymer reinforced concrete structure waterproof layer, and top is that movable polyurethane is protected
Warm top cover.
(2) maintenance bottom of pond portion is the accumulation of heat water layer of 50cm thickness, and accumulation of heat water layer conserves early stage releasing heat, dimension in prefabricated components
The temperature in curing pool is held, the aquation of prefabricated components concrete is accelerated, absorbs the heat that prefabricated components are released in the maintenance later period；It stores
The evaporation of hot water layer's moisture keeps the moisture stable in curing pool, realizes the moisture maintenance of prefabricated components.
(3) triethanolamine for accounting for cement consumption 0.04% is added in prefabricated components concrete.
(4) after the railway concrete pre-stress rail plate of forming being put into curing pool, insulated roof is covered, concrete enters
Curing pool temperature is 16 DEG C.
(5) when conserving 16h in curing pool, temperature is 45 DEG C, concrete crushing strength 42MPa in curing pool, same to match
It is 45MPa than 45 DEG C of steam curing of concrete compression strength of identical age.
Embodiment 3:
A kind of self-heating insulated curing system for railway concrete pre-stress rail plate, feature are as follows.
(1) self-heating insulated curing system ecto-entad is followed successively by reinforced concrete floor, polyurethane water-proof layer, gathers in curing pool
Urethane insulating layer, aluminium foil heat-reflecting layer, bottom are laid with polymer reinforced concrete structure waterproof layer, and top is that movable polyurethane is protected
Warm top cover.
(2) maintenance bottom of pond portion is the accumulation of heat water layer of 50cm thickness, and accumulation of heat water layer conserves early stage releasing heat, dimension in prefabricated components
The temperature in curing pool is held, the aquation of prefabricated components concrete is accelerated, absorbs the heat that prefabricated components are released in the maintenance later period；It stores
The evaporation of hot water layer's moisture keeps the moisture stable in curing pool, realizes the moisture maintenance of prefabricated components.
(3) addition accounts for the hydrated calcium silicate seed crystal material of cement consumption 8% in prefabricated components concrete, while adding and accounting for water
The triethanolamine of mud weight 0.04%.
(4) after the railway concrete pre-stress rail plate of forming being put into curing pool, insulated roof is covered, concrete enters
Curing pool temperature is 16 DEG C.
(5) when conserving 16h in curing pool, temperature is 51 DEG C, concrete crushing strength 48MPa in curing pool, same to match
It is 45MPa than 45 DEG C of steam curing of concrete compression strength of identical age.
The above is only preferred embodiments of the invention, is not intended to limit the present invention in any form.It is all
Any simple modification, equivalent variations and modification are made to above embodiments according to the technical essence of the invention, still fall within the present invention
In the range of technical solution.
Claims (9)
1. a kind of self-heating insulated curing system for railway concrete prefabricated components, for railway pre stressed concrete sleeper, track plates,
These concentrate the component of maintenance using curing pool for tubular pole and elastic supporting block, its feature is as follows:
(1) self-heating insulated curing system ecto-entad is followed successively by reinforced concrete floor, polyurethane water-proof layer, polyurethane in curing pool
Insulating layer, finishing coat, bottom are laid with polymer reinforced concrete structure waterproof layer, and top is movable polyurethane heat-insulation top cover；
(2) maintenance bottom of pond portion is the accumulation of heat water layer of 50cm thickness, and accumulation of heat water layer conserves early stage releasing heat in prefabricated components, maintains to support
The temperature in pond is protected, the aquation of prefabricated components concrete is accelerated, absorbs the heat that prefabricated components are released in the maintenance later period；Accumulation of heat water
Layer moisture evaporation keeps the moisture stable in curing pool, realizes the moisture maintenance of prefabricated components；
(3) the hydrated calcium silicate seed crystal material and 0.02% ~ 0.1% for accounting for cement consumption 5% ~ 10% are added in prefabricated components concrete
The early hydration hardening rate for accelerating prefabricated components concrete is used in combination in triethanolamine, the two；
(4) after the railway concrete prefabricated components after completing are put into curing pool, insulated roof is covered, makes full use of prefabricated structure
The heat of part release is conserved；
(5) when railway prefabricated concrete members compression strength reaches design strength, top cover is opened, is demoulded.
2. self-heating insulated curing system as described in claim 1, polyurethane insulation coating is to spray, with a thickness of 8cm ~
12cm, density 30kg/m3~70kg/m3, thermal coefficient is less than 0.02W/ (m.K).
3. self-heating insulated curing system as described in claim 1, finishing coat be masking foil, aluminium-foil paper and glass reinforced plastic one kind or
It is several.
4. self-heating insulated curing system as described in claim 1, polymer cream in polymer reinforced concrete structure waterproof layer
Liquid material is the 10% ~ 15% of cement, waterproofing layer thickness 10cm, concrete intermediate arrangementφThe reinforced mesh of 8mm.
5. self-heating insulated curing system as described in claim 1, accumulation of heat water layer is as energy storage material, by extra heat storage
In water, it is released in the concrete prefabricated element maintenance of the second layer.
6. self-heating insulated curing system as described in claim 1, addition accounts for 5% ~ 10% aquation silicic acid of cement consumption in concrete
Calcium, the calcium silicon ratio of hydrated calcium silicate are 1.2:1 ~ 3:1, and the partial size of hydrated calcium silicate is not more than 5 μm；Addition accounts for cement consumption
0.02% ~ 0.1% triethanolamine.
7. self-heating insulated curing system as described in claim 1, the heat for making full use of concrete autoreactivity to release utilize
The heat insulation function of polyurethane keeps the temperature the heat of release, reduces the temperature gradient of prefabricated components concrete, and is stored using water
Heat further speeds up the hydration and hardening of concrete, improves early strength.
8. above-mentioned railway concrete prefabricated components self-heating insulated curing system, is conserved by concrete self-heat generation, is taken
For steam curing, above system can realize that temperature is that 40 DEG C ~ 50 DEG C temperature are adjustable in insulated building, and soaking time is greater than 48h.
9. above-mentioned railway concrete prefabricated components self-heating insulated curing system, be applicable to sleeper, track plates, section of jurisdiction self-heating
Insulated curing is equally applicable to the self-heating insulated curing of civil buildings prefabricated components.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811034817.5A CN109176851B (en) | 2018-09-06 | 2018-09-06 | Self-heating heat-preservation maintenance system for railway concrete prefabricated part |
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| CN201811034817.5A CN109176851B (en) | 2018-09-06 | 2018-09-06 | Self-heating heat-preservation maintenance system for railway concrete prefabricated part |
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| CN109176851B CN109176851B (en) | 2020-10-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113319992A (en) * | 2021-07-01 | 2021-08-31 | 清华大学 | Precast concrete product curing method based on cement hydration heat |
| CN113979690A (en) * | 2021-10-13 | 2022-01-28 | 华润水泥技术研发有限公司 | Anti-saltpetering permeable concrete and preparation method thereof |
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| CN107352836A (en) * | 2017-08-04 | 2017-11-17 | 南京成弘建新材料有限公司 | Superpower nucleus of ultra early-strength concrete admixture and preparation method thereof |
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| CN103862561A (en) * | 2012-12-11 | 2014-06-18 | 天元建设集团有限公司 | Heat exchange device for concrete component and hydration heat utilization method |
| JP2015152466A (en) * | 2014-02-17 | 2015-08-24 | 大和ハウス工業株式会社 | Concrete sample production method, concrete sample and production device of sample |
| CN204228496U (en) * | 2014-11-30 | 2015-03-25 | 江苏金贸科技发展有限公司 | A kind of simple stretch test humidity curing box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113319992A (en) * | 2021-07-01 | 2021-08-31 | 清华大学 | Precast concrete product curing method based on cement hydration heat |
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| CN113979690A (en) * | 2021-10-13 | 2022-01-28 | 华润水泥技术研发有限公司 | Anti-saltpetering permeable concrete and preparation method thereof |
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| CN109176851B (en) | 2020-10-02 |
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Inventor after: Xie Yongjiang Inventor after: Zheng Xinguo Inventor after: Li Shuming Inventor before: Zheng Xinguo Inventor before: Li Shuming Inventor before: Xie Yongjiang |