CN110530753A - The test method of existing building outer heat preservation system anticracking grout polymer content - Google Patents
The test method of existing building outer heat preservation system anticracking grout polymer content Download PDFInfo
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- CN110530753A CN110530753A CN201910742912.9A CN201910742912A CN110530753A CN 110530753 A CN110530753 A CN 110530753A CN 201910742912 A CN201910742912 A CN 201910742912A CN 110530753 A CN110530753 A CN 110530753A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
The invention discloses a kind of test methods of existing building outer heat preservation system anticracking grout polymer content, it is characterized in that, the polymer is VAE type polymer, the test method includes: that (1) samples and carries out thermal analysis test S1. in corresponding test zone internal cutting external thermal insulation system to insulating layer, takes the anticracking grout sample containing grid cloth；S2. it by after the anticracking grout drying after sampling, grinds, sieving；S3. the mortar specimen for weighing certain mass carries out thermal analysis test；S4. the thermal analysis curve of field sampling anticracking grout is determined；(2), VAE rubber powder content p calculation formula is as follows in data analysis anticracking grout:
Description
Technical field
The present invention relates to a kind of test methods of existing building outer heat preservation system anticracking grout polymer content.
Background technique
The beginning of this century, the country under the guide of energy-saving and emission-reduction developing policy, by country, local policy dual promotion,
On the basis of using for reference the achievement by advanced countries such as Germany, external walls heating insulation is widely used in all kinds of buildings.Shanghai City is from 2001
Year rises and gradually promotes external walls heating insulation, wherein being external thermal insulation system using what is had a large capacity and a wide range the most.According to incompletely statistics,
The exterior wall area that in April, 2007-2015 whole city Nian8Yue implements power conservation requirement is 2.21 hundred million m2, wherein external thermal insulation system
Area is 2.15 hundred million m2, and accounting is about 97.0%, other heat-insulation system (exterior wall internal insulation etc.) accountings are 3.0%.In this city
In external thermal insulation system, maximum usable floor area is inorganic heat insulation mortar system (95,780,000 m2, accounting 44.6%) and EPS sheet
External insulating system for thinly plastered external wall (65,350,000 m2, accounting 30.4%).
Wall thermal insulating also exposes problems while contributing for urban building energy saving in use,
Many worries are brought for city O&M, cause the extensive concern of various circles of society and the great attention of governments at all levels.In recent years, state
Heat preservation system inside occur cracking, large area hollowing, the diseases problem such as fall off report occur often, be only related to outside exterior wall within 2014
Heat preservation hollowing, the serious problems such as fall off news report just up to 53.Shanghai City also occurs some heat-insulation systems in recent years and falls off
Event, as Fudan University teacher apartment outer wall material large area falls off, Jiading city You Huo insulating layer of external wall large area falls off, Pu
Supermarket, eastern new district Wal-Mart exterior wall tile large area falls off, the Baoshan District garden Zi Chen cell insulating layer of external wall falls off, Shanghai University is realistic
Building insulating layer of external wall falls off, and the asd number for the diseases problems such as cracking, infiltration, hollowing occur is more, socially causes
Different degrees of negative effect.
By investigating discovery to the building case that accident occurs, there is the position of quality problems in a large amount of external thermal insulation systems
Positioned at anticracking grout and binding sand pulp layer, anticracking grout and binding sand pulp layer belong to polymer-modified cement mortar, bonding
The forfeiture of ability will result directly in the appearance of a large amount of building safety problems.Polymer content is to sand in polymer-modified cement mortar
There is important guarantee effect to have reached educational circles's common recognition for slurry adhesion strength, flexural strength, flexibility and anti-cracking ability.For profit-push
It maximizes, improves the market competitiveness, a large amount of counterfeit and shoddy goods flood market, and wherein polymer content, which is much smaller than, meets mortar
The dosage of energy index request.
Based on this, has many experts and scholar proposes to study test polymer content and in engineering project process of supervision
The viewpoint of middle detection mortar polymer content.Tianjin local standards " civil buildings building enclosure energy conservation detection technique rule at present
Journey " DBT29-88-2014 is by " external thermal insulation system adhesive, decorative mortar polymer content effective substance side
Method " is included in one of the foundation of site supervision control product quality.But after study, complicated operation, needs to detect for this method
Instrument is more, operability is to be improved, therefore not expanded reference.
Check and evaluation is carried out to existing building outer heat preservation system quality condition, to determine existing building outer heat preservation system cracking resistance
The anti-cracking ability of mortar determines the technical level of anticracking grout, and it is extremely important that field sampling tests its polymer content.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of existing building outer heat preservation system anticracking grout polymer contents
Test method, accuracy rate is high, can be realized field sampling test, strong operability.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:
A kind of test method of existing building outer heat preservation system anticracking grout polymer content provided by the invention, it is described poly-
Conjunction object is VAE type polymer, and the test method includes:
(1) it samples and carries out thermal analysis test
S1. the anticracking grout containing grid cloth is taken to try to insulating layer in corresponding test zone internal cutting external thermal insulation system
Sample；
S2. it by after the anticracking grout drying after sampling, grinds, sieving；
S3. the mortar specimen for weighing certain mass carries out thermal analysis test；
S4. the thermal analysis curve of field sampling anticracking grout is determined；
(2) data are analyzed
Polymer content calculation method is as follows in anticracking grout sample:
S1. according to VAE rubber powder thermal analysis curve, VAE characteristic peak weightless temperature range (250-500) DEG C and characteristic peak are determined
Mass percent α determines known polymer type according to design data；
S2. according to anticracking grout, i.e. blank formula, rubber powder content is the thermal analysis curve of 0 sample, determines anticracking grout sky
White formula, rubber powder content are weightless mass percent β of 0 sample in (250-500) DEG C temperature range, i.e., hydrated product is at this
The percent weight loss in section；
S3. according to the thermal analysis curve of anticracking grout obtained by Practical Project field sampling, thermogravimetric analysis, field sampling is determined
Weightless mass percent γ of the anticracking grout in (250-500) DEG C temperature range；
VAE rubber powder content p calculation formula is as follows in anticracking grout:
In formula:
α is the mass percent that characteristic peak (200-500) DEG C range is decomposed in the pure rubber powder of VAE；
β is anticracking grout blank formula, and rubber powder content is weightless quality of 0 sample in (250-500) DEG C temperature range
Percentage；
γ is the coefficient of hydration that different addition quantity rubber powder acts on lower anticracking grout, meets curve γ=383P2-15.7P+1；
ω is weightless mass percent of the field sampling anticracking grout in (250-500) DEG C temperature range；
P is polymer content percentage.
As further improvement of the invention: (1) sampling and carry out that anticracking grout surface should be removed in thermal analysis test S1.
The thermal insulation material of adherency, and the punch with side length less than alkali resistant glass fibre open weave cloth mesh inner edge 1mm cuts each mesh middle part
The anticracking grout divided, avoids hardening rubber cement and glass fiber reticular cloth that will be close to glass fiber reticular cloth from scaling off.
As further improvement of the invention: (1) sampling and carry out thermal analysis test S2. and set the anticracking grout after sampling
It dries at 45 DEG C in electric heating air blast temperature-controlled drying case, is ground after drying to constant weight using planetary ball mill, until all
Pass through the square hole screen in 0.075 μm of aperture.
As further improvement of the invention: (1) sampling and carry out the mortar examination that thermal analysis test S3. weighs certain mass
Sample, be placed in synchronous solving in set crucible, set temperature elevating range as -1000 DEG C of room temperature, heating rate be 10 DEG C/min, nitrogen
Atmosphere is enclosed, and synchronous solving carries out thermal analysis test.
A kind of test method of existing building outer heat preservation system anticracking grout polymer content provided by the invention calculates glue
The test method accuracy rate of powder content is higher, strong operability, is based on a large amount of basic research data, introduces aquation system pioneeringly
Number concept, for VAE type polymer, which occupies 85% or more market, determines that existing building outer heat preservation system is anti-
The in-situ check and test method for splitting the polymer content of mortar solves the technical field existing unsolved technology for a long time
Problem.
Specific embodiment
Below by way of specific embodiment to a kind of existing building outer heat preservation system anticracking grout polymer provided by the invention
The test method of content does further more detailed description:
Related experiment
One, test method
A.1 general provision
The measurement of thermogravimetry content of VAE type polymer suitable for external thermal insulation system anticracking grout.
A.2 the technical indicator of test equipment
A.2.1 synchronous solving (TG-DSC), temperature range: -1000 DEG C of room temperature；Heating rate: 0-100 (DEG C/
min)；Calorimetric accuracy/precision: A grades；Balance resolution ratio: 0.1 μ g.
A.2.2 other equipment and instrument should include: electric heating air blast temperature-controlled drying case, planetary ball mill, electronic balance (sense
Amount is 0.1mg), standard sandstone sieve (0.075mm), matches set crucible.
A.3 testing procedure
A.3.1 in corresponding test zone internal cutting external thermal insulation system to insulating layer, take anticracking grout (containing grid cloth)
Sample.The thermal insulation material of anticracking grout surface adhesion should be removed, and with side length less than alkali resistant glass fibre open weave cloth mesh inner edge 1mm's
Punch cuts the anticracking grout of each mesh middle section, and should be avoided will be close to the hardening rubber cement and fiberglass mesh of glass fiber reticular cloth
Cloth scales off.The anticracking grout sample of different test zones should be placed and be numbered respectively, must not be obscured.
A.3.2 the anticracking grout after sampling is placed in electric heating air blast temperature-controlled drying case at 45 DEG C and is dried, after drying to constant weight
It is ground using planetary ball mill, until all passing through the square hole screen in 0.075 μm of aperture.
A.3.3 the mortar specimen for weighing certain mass is placed in synchronous solving in set crucible.Set temperature elevating range as
- 1000 DEG C of room temperature, heating rate are 10 DEG C/min, nitrogen atmosphere, and synchronous solving carries out thermal analysis test.
A.3.4 the thermal analysis curve of field sampling anticracking grout is determined.
A.4 data are analyzed
A.4.1 polymer content calculation method is as follows in anticracking grout sample:
S1, according to VAE rubber powder thermal analysis curve, determine VAE characteristic peak weightless temperature range (250-500) DEG C and characteristic peak
Mass percent α determines known polymer type according to design data；
S2, according to anticracking grout, i.e. blank formula, rubber powder content is the thermal analysis curve of 0 sample, determines anticracking grout sky
White formula, rubber powder content are weightless mass percent β of 0 sample in (250-500) DEG C temperature range, i.e., hydrated product is at this
The percent weight loss in section；
S3, according to Practical Project field sampling, the thermal analysis curve of anticracking grout obtained by thermogravimetric analysis, determine field sampling
Weightless mass percent γ of the anticracking grout in (250-500) DEG C temperature range；
VAE rubber powder content p calculation formula is as follows in S4 anticracking grout:
In formula:
α is the mass percent of characteristic peak in the pure rubber powder of VAE ((200-500) DEG C range is decomposed)；
β is that (blank formula, rubber powder content are 0) weightless matter of the sample in (250-500) DEG C temperature range to anticracking grout
Measure percentage；
γ is the coefficient of hydration that different addition quantity rubber powder acts on lower anticracking grout, meets curve γ=383P2-15.7P+1；
ω is weightless mass percent of the field sampling anticracking grout in (250-500) DEG C temperature range
P is polymer content percentage.
Embodiment 1
The test method of the existing building outer heat preservation system anticracking grout polymer content of the present embodiment, the polymer are
VAE type polymer, the test method include:
(1) it samples and carries out thermal analysis test
S1. the anticracking grout containing grid cloth is taken to try to insulating layer in corresponding test zone internal cutting external thermal insulation system
Sample；
S2. it by after the anticracking grout drying after sampling, grinds, sieving；
S3. the mortar specimen for weighing certain mass carries out thermal analysis test；
S4. the thermal analysis curve of field sampling anticracking grout is determined；
(2) data are analyzed
Polymer content calculation method is as follows in anticracking grout sample:
S1. according to VAE rubber powder thermal analysis curve, VAE characteristic peak weightless temperature range (250-500) DEG C and characteristic peak are determined
Mass percent α determines known polymer type according to design data；
S2. according to anticracking grout, i.e. blank formula, rubber powder content is the thermal analysis curve of 0 sample, determines anticracking grout sky
White formula, rubber powder content are weightless mass percent β of 0 sample in (250-500) DEG C temperature range, i.e., hydrated product is at this
The percent weight loss in section；
S3. according to the thermal analysis curve of anticracking grout obtained by Practical Project field sampling, thermogravimetric analysis, field sampling is determined
Weightless mass percent γ of the anticracking grout in (250-500) DEG C temperature range；
VAE rubber powder content p calculation formula is as follows in anticracking grout:
In formula:
α is the mass percent that characteristic peak (200-500) DEG C range is decomposed in the pure rubber powder of VAE；
β is anticracking grout blank formula, and rubber powder content is weightless quality of 0 sample in (250-500) DEG C temperature range
Percentage；
γ is the coefficient of hydration that different addition quantity rubber powder acts on lower anticracking grout, meets curve γ=383P2- 15.7P+1, p
It is equivalent in meaning with the p in above-mentioned formula；
ω is weightless mass percent of the field sampling anticracking grout in (250-500) DEG C temperature range；
P is polymer content percentage.
Wherein:
It samples and carries out the thermal insulation material that should remove anticracking grout surface adhesion in thermal analysis test S1., and is small with side length
The anticracking grout of each mesh middle section is cut in the punch of alkali resistant glass fibre open weave cloth mesh inner edge 1mm, avoids that glass will be close to
The hardening rubber cement and glass fiber reticular cloth of fine grid cloth scale off.
It samples and carries out thermal analysis test S2. and the anticracking grout after sampling is placed in electric heating air blast temperature-controlled drying case 45 DEG C
Lower drying is ground after drying to constant weight using planetary ball mill, until all passing through the square hole screen in 0.075 μm of aperture.
The mortar specimen that thermal analysis test S3. weighs certain mass is sampled and carried out, the mating earthenware of synchronous solving is placed in
In crucible, setting temperature elevating range as -1000 DEG C of room temperature, heating rate is 10 DEG C/min, nitrogen atmosphere, and synchronous solving carries out heat
Analysis test.
Following table data are obtained by solving linear equation in two unknowns:
Rubber powder weightlessness mass ratio in the present embodiment see the table below 1:
1 rubber powder A weightlessness mass ratio of table
Anticracking grout weightlessness mass ratio in the present embodiment see the table below 2:
The anticracking grout for preparing 0%, 1%, 2%, 4% rubber powder content respectively, and is applied to surface of wall, field sampling into
Row test.
2 anticracking grout weightlessness mass ratio of table
| Sample | 250-500(β) |
| 1# (no rubber powder) | 5.270 |
| 2# (1% content) | 5.600 |
| 3# (2% content) | 6.190 |
| 4# (4% content) | 8.850 |
Anticracking grout actual value and test value in the present embodiment see the table below 3:
3 rubber powder content computational chart of table
By the rubber powder content computational chart of table 3, it is known that after coefficient of hydration is modified, the present invention calculates rubber powder content
No better than the content being pre-designed, it follows that the test method accuracy rate is higher.
It should be appreciated that the purposes of these embodiments is merely to illustrate the present invention and is not intended to limit protection model of the invention
It encloses.In addition, it should also be understood that, after reading the technical contents of the present invention, those skilled in the art can make the present invention each
Kind change, modification and/or variation, all these equivalent forms equally fall within guarantor defined by the application the appended claims
Within the scope of shield.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.Institute
Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.
Claims (4)
1. the test method of existing building outer heat preservation system anticracking grout polymer content, which is characterized in that the polymer is
VAE type polymer, the test method include:
(1) it samples and carries out thermal analysis test
S1. the anticracking grout sample containing grid cloth is taken to insulating layer in corresponding test zone internal cutting external thermal insulation system；
S2. it by after the anticracking grout drying after sampling, grinds, sieving；
S3. the mortar specimen for weighing certain mass carries out thermal analysis test；
S4. the thermal analysis curve of field sampling anticracking grout is determined；
(2) data are analyzed
Polymer content calculation method is as follows in anticracking grout sample:
S1. according to VAE rubber powder thermal analysis curve, VAE characteristic peak weightless temperature range (250-500) DEG C and characteristic peak quality are determined
Percentage α determines known polymer type according to design data；
S2. according to anticracking grout, i.e. blank formula, rubber powder content is the thermal analysis curve of 0 sample, determines that anticracking grout blank is matched
Side, rubber powder content are weightless mass percent β of 0 sample in (250-500) DEG C temperature range, i.e., hydrated product is in the section
Percent weight loss；
S3. according to the thermal analysis curve of anticracking grout obtained by Practical Project field sampling, thermogravimetric analysis, field sampling cracking resistance is determined
Weightless mass percent γ of the mortar in (250-500) DEG C temperature range；
VAE rubber powder content p calculation formula is as follows in anticracking grout:
In formula:
α is the mass percent that characteristic peak (200-500) DEG C range is decomposed in the pure rubber powder of VAE；
β is anticracking grout blank formula, and rubber powder content is weightless quality percentage of 0 sample in (250-500) DEG C temperature range
Than；
γ is the coefficient of hydration that different addition quantity rubber powder acts on lower anticracking grout, meets curve γ=383P2-15.7P+1；
ω is weightless mass percent of the field sampling anticracking grout in (250-500) DEG C temperature range；
P is polymer content percentage.
2. the test method of existing building outer heat preservation system anticracking grout polymer content according to claim 1, special
Sign is:
It samples and carries out thermal analysis test
The thermal insulation material of anticracking grout surface adhesion should be removed in S1, and is less than alkali resistant glass fibre open weave cloth mesh inner edge with side length
The punch of 1mm cuts the anticracking grout of each mesh middle section, avoids the hardening rubber cement that will be close to glass fiber reticular cloth and glass
Grid cloth scales off.
3. the test method of existing building outer heat preservation system anticracking grout polymer content according to claim 1, special
Sign is:
It samples and carries out thermal analysis test
Anticracking grout after sampling is placed in electric heating air blast temperature-controlled drying case at 45 DEG C and dries by S2, and planet is used after drying to constant weight
Formula ball mill is ground, until all passing through the square hole screen in 0.075 μm of aperture.
4. the test method of existing building outer heat preservation system anticracking grout polymer content according to claim 1, special
Sign is:
It samples and carries out thermal analysis test
S3 weighs the mortar specimen of certain mass, is placed in synchronous solving in set crucible, sets temperature elevating range as room temperature-
1000 DEG C, heating rate be 10 DEG C/min, nitrogen atmosphere, synchronous solving carry out thermal analysis test.
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