CN109987868A - A kind of concrete anti-cracking agent and its preparation method and application - Google Patents
A kind of concrete anti-cracking agent and its preparation method and application Download PDFInfo
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- CN109987868A CN109987868A CN201811488364.3A CN201811488364A CN109987868A CN 109987868 A CN109987868 A CN 109987868A CN 201811488364 A CN201811488364 A CN 201811488364A CN 109987868 A CN109987868 A CN 109987868A
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- concrete
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- ardealite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Abstract
The present invention provides a kind of concrete anti-cracking agent, the following component including following parts by weight: 10-70 parts of flyash；10-70 parts of phosphorus ore slag；5-55 parts of ardealite；3-35 parts of magnesia；Wherein, the source of the ardealite are as follows: phosphoric acid is prepared using sulfuric acid treating phosphorite, collects solid slag produced during the preparation process, the solid slag is subjected to high-temperature calcination under conditions of temperature is 800 DEG C~1000 DEG C, the ardealite is prepared.
Description
Technical field
The invention belongs to the field of building materials more particularly to a kind of concrete anti-cracking agent and its preparation method and application.
Background technique
Concrete is one of the present age most important civil engineering material, is widely used in the every aspect of building field.Often
In concrete, since cement consumption is larger, lead to that the hydration temperature of concrete is higher, Early self-shrinkage is obvious, therefore, mixes
Solidifying soil contraction distortion is big, is easy cracking.Further, since the volatilization of later period concrete Free water, will further result in concrete
Contraction distortion.Contraction can make Concrete Structure Crack, reduce the density of concrete structure, influence concrete it is impervious,
The performances such as freeze proof, anticorrosive.And use swelling agent as expansive concrete material there are obvious shortcoming currently on the market, tool
Phenomena such as body surface is present: the heat of hydration of concrete is high, and concrete shrinkage deformation is big, generally existing concrete cracking, leakage, and
Greatly reduce concrete strength.
Therefore, it is cheap to find one kind, both can solve environmental protection pressure and (largely made product, development using industrial waste
Circular economy), but can reach effectively prevent concrete cracking and leak purpose anti-cracking agent, be always building technology worker and
Relevant departments, governments at all levels key subjects of interest.
Summary of the invention
The purpose of the present invention is to provide a kind of concrete anti-cracking agents, it is intended to solve concrete cracking and ask with what is leaked
Topic.
For achieving the above object, The technical solution adopted by the invention is as follows:
A kind of concrete anti-cracking agent, the following component including following parts by weight:
Wherein, the source of the ardealite are as follows: phosphoric acid is prepared using sulfuric acid treating phosphorite, is collected produced during the preparation process
The solid slag is carried out high-temperature calcination under conditions of temperature is 800 DEG C~1000 DEG C, is prepared described by solid slag
Ardealite.
Correspondingly, a kind of preparation method of concrete anti-cracking agent, includes the following steps:
Each component is weighed respectively with anticracking agent prescription according to concrete of the present invention, and above-mentioned each component is subjected to ball
Mill, mixed processing.
And concrete of the present invention can be used as concrete admixture or anti-cracking concrete admixture application with anti-cracking agent.
Concrete anti-cracking agent provided by the invention passes through using flyash, ardealite, phosphorus ore slag and magnesia as raw material
It cooperates between four kinds of components, so that concrete had both met the needs of concrete early hydration mineral with anti-cracking agent, simultaneously
The temperature of concrete is reduced, and effectively extends later concrete Bulking Time, has ensured later concrete shrinkage-compensating.
Wherein, the addition of phosphorus ore slag effectively can occur hair with other components and answer, the intensity of concrete can be dramatically increased, so that this hair
The bright concrete anti-cracking agent is preparing the especially big physical volume concretes such as Hydropower Dam, military engineering, nuclear power engineering, subway engineering
And when high-strength, high performance concrete, can be effectively improved under the premise of ensuring and improving concrete strength its anti crack performance and
Stability and endurance quality.In addition, concrete anti-cracking agent provided by the invention is with four kinds of discarded by-product flyash, phosphorus stones
Cream, phosphorus ore slag and magnesia are raw material, production cost can be greatly reduced, it is often more important that alleviate ardealite, phosphorus ore slag band
The ecological pressure come, meets environmentally protective theory.
The preparation method of concrete anti-cracking agent provided in this embodiment, low in cost, simple process is controllable, easy to accomplish
Industrialized development.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain
The present invention is not intended to limit the present invention.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more of the features.In the description of the present invention,
The meaning of " plurality " is two or more, unless otherwise specifically defined.
The embodiment of the invention provides a kind of concrete anti-cracking agent, the following component including following parts by weight:
Wherein, the source of the ardealite are as follows: phosphoric acid is prepared using sulfuric acid treating phosphorite, is collected produced during the preparation process
The solid slag is carried out high-temperature calcination under conditions of temperature is 800 DEG C~1000 DEG C, is prepared described by solid slag
Ardealite.
Concrete anti-cracking agent provided in an embodiment of the present invention is original with flyash, ardealite, phosphorus ore slag and magnesia
Material, by cooperating between four kinds of components, so that concrete had both met the need of concrete early hydration mineral with anti-cracking agent
It wants, while reducing hydration temperature, and effectively extend later concrete Bulking Time, ensured that later concrete is shunk and mended
It repays.Wherein, the addition of phosphorus ore slag effectively can occur hair with other components and answer, can slow down concrete coagulating time, postpone insulation
The appearance of temperature rise peak value, so that concrete anti-cracking agent of the present invention is preparing mass concrete and high-strength, high-performance
When concrete, its anti crack performance and stability and durability can be effectively improved under the premise of ensuring and improving concrete strength
Energy.In addition, concrete anti-cracking agent provided in an embodiment of the present invention with four kinds of discarded by-product flyash, ardealite, phosphorus ore slag and
Magnesia is raw material, and production cost can be greatly reduced, while alleviating ardealite, phosphorus ore slag bring ecological pressure, is met green
Color environmental protection concept.
Specifically, it is that China is current that the flyash, which is the solid waste of coal fired thermal power plant discharge, in the embodiment of the present invention
One of biggish industrial residue of discharge capacity.With the development of power industry, the flyash discharge capacity of coal-burning power plant increases year by year.Largely
Flyash it is untreated, will generate fugitive dust, pollute atmosphere；Silt up if being discharged into water system and will cause river, and it is therein toxic
Chemical substance can also cause damages to human body and biology.Therefore, it is necessary to rationally utilized to the flyash, avoid its for
Environment, human body, biology adversely affect.
Master in the embodiment of the present invention, using flyash as the matrix component of concrete anti-cracking agent, in the flyash
Want ingredient SiO2、Al2O3As the concrete main active of anti-cracking agent component, hydration occurs under certain condition,
To reduce the heat of hydration of concrete, the compression strength of concrete is improved.In some embodiments, with the gross weight of the flyash
For 100% meter, wherein SiO2Weight percentage be >=30%, Al2O3Weight percentage be >=20%.
Due to must avoidable the unburned carbon granule and Fe loose porous containing part in the flyash2O3.The non-charcoal
Grain is a kind of inert substance, and content has influence to the activity of flyash, and content is higher, and the activity value reduction of flyash is got over
Obviously, and the presence of the ingredient is also unfavorable to the compacting of flyash.And excessive Fe2O3It can inhibit the performance of flyash activity.For
Prevent for example unburned carbon granule of other compositions, Fe2O3It is impacted Deng the activity to the flyash, gives full play to above-mentioned flyash
The effect of active constituent, in the embodiment of the present invention, as a preferred embodiment, the loss on ignition < 8% of the flyash.
As specific embodiment, in the concrete anti-cracking agent parts by weight of flyash be 10 parts, 15 parts, 20 parts,
25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts etc..
In the embodiment of the present invention, the ardealite derives from solid slag when preparing phosphoric acid using sulfuric acid treating phosphorite,
The solid slag generated when i.e. in phosphoric acid production with sulfuric acid treating phosphorite.China's phosphatic fertilizer company is substantially all using wet process at present
One of the byproduct of phosphoric acid process, this technique is exactly ardealite, and every 1 ton of phosphoric acid of production generates 4.5~5 tons of ardealites, with
The ardealite amount of the fast development of China's high-concentration phosphate compound fertilizers and phosphoric acid industry, by-product sharply increases.According to Chinese phosphorus compound fertilizer industry
Association's statistics, 2016, whole industry ardealite yield was 76,000,000 tons, fell 5% on a year-on-year basis；Ardealite utilization 27,700,000
Ton, increases by 4.5% on a year-on-year basis；Current year comprehensive utilization ratio is 36.5%, improves 3 percentage points on year-on-year basis.Due to resource utilization skill
Art bottleneck, it is more than 200,000,000 tons that China's ardealite, which adds up volume of cargo in storage,.The storage of the industrial residue does not only take up a large amount of arable lands, and waste is big
Measure construction fund, and if storage it is improper, also would seriously pollute the environment.It can rationally be turned waste into wealth using ardealite.
Another important component of the embodiment of the present invention using the ardealite as concrete anti-cracking agent.In the ardealite
Contain content higher CaO and SO3, as main active constituent, can occur with the ingredient in flyash, phosphorus ore slag component
Reaction generates high-intensitive active material, such as hydrated calcium silicate, drated calcium aluminate and aquation calcium sulfate；In addition, ardealite
Addition, moreover it is possible to be used at some extent as setting time regulator.
It is worth noting that, in the embodiment of the present invention, and it is indirect by phosphoric acid production with sulfuric acid treating phosphorite when generate
Solid slag directly use, the solid slag that the generates when ardealite is by preparing phosphoric acid using sulfuric acid treating phosphorite, through 800
DEG C~1000 DEG C of high-temperature calcination prepares.On the one hand, by 800 DEG C~1000 DEG C of high-temperature calcination, the ardealite with
Other materials act on produce entringite, due to entringite be it is needle-shaped, can be with the gap in fill concrete, to improve coagulation
The density of soil improves anti-permeability performance.On the other hand, by 800 DEG C~1000 DEG C of high-temperature calcination, the phosphorus stone can be removed
Its impurity as concrete anti-cracking agent component, such as P is influenced in cream2O5Deng to increase the activity of ardealite.
In the embodiment of the present invention, as specific embodiment, the parts by weight of ardealite are 5 in the concrete anti-cracking agent
Part, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts etc..
In the embodiment of the present invention, increase magnesia components in the concrete anti-cracking agent, the magnesia is to use
The magnesia of high-temperature calcination magnesite powder production, magnesia purity are >=60%.Concrete described in the embodiment of the present invention is used anti-
After splitting in agent while being added magnesia and ardealite ingredient, main component one of of the magnesia as anti-cracking agent, due to magnesia
With outstanding expansion character, it can efficiently extend Bulking Time, adjustment expansion rate, the contraction of effective compensating concrete
Rate, so that concrete shrinks less or do not shrink.
In the embodiment of the present invention, the magnesia volume is small, and according to existing market mixing plant situation, it is equal to be difficult stirring
It is even；When the magnesia volume is excessive, addition concrete is not restrained with the concrete after anti-cracking agent.Given this, on the one hand, this hair
The content of magnesia described in bright embodiment is 3-35 parts.As specific embodiment, the concrete is aoxidized in waterproofing and anti-leakage agent
The parts by weight of magnesium are 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts etc. specific
Component.On the other hand, using the flyash, ardealite and phosphorus ore slag as main body, magnesia is mixed as concrete anti-crack additive
It uses, magnesia can be dispersed in concrete, flyash, ardealite, phosphorus ore slag and magnesia generate collaboration
Effect, significantly improves the anti crack performance of concrete.
It is further preferred that the mass ratio of the ardealite and the magnesia is 6:455~65:35~45, more preferably
For 60:40, to obtain so that ardealite and magnesia realize timeliness cooperation when alleviating concrete expansion.
In some preferred embodiments, the specific surface area of the ardealite is 520~570m2/ kg, the ratio of the magnesia
Surface area is 630~670m2/ kg, the specific surface area of the ardealite are greater than the specific surface area of the magnesia.Due to the phosphorus
The hydration rate of gypsum is faster than the hydration rate of the magnesia, and it is poor that the embodiment of the present invention passes through the fineness both pulled open, can be with
Coordinate its aquation rhythm, reach and take over from the past and set a new course for the future, continue expansion effect, with the contraction of preferably compensating concrete, improves crack resistance
Energy.It is furthermore preferred that the specific surface area of the ardealite is 550 ± 5m2/ kg, the specific surface area of the magnesia are 650 ± 5m2/
kg。
The component of the magnesia and ardealite as concrete anti-cracking agent, although concrete coagulation can be adjusted effectively
Time, but simultaneously, the magnesia, the ardealite have certain influence to the intensity of concrete.When the magnesia, institute
It states after ardealite equivalent replaces cementitious material, under the compression strength of concrete, split tensile strength, axial tensile strength and limit stretch value
Drop, i.e. concrete strength decline.In order to not influence concrete anti-cracking agent anti crack performance, while strong concrete can be effectively relieved again
The problem of degree decline, phosphorus ore slag is added in the concrete anti-cracking agent.The phosphorus ore slag is that phosphorus ore factory utilizes electric furnace legal system
The industrial residue generated when taking yellow phosphorus, mainly contains CaO, SiO2、P2O5、Al2O3、Fe2O3Equal ingredients.On the one hand, phosphorus ore slag
One of main component as anti-cracking agent, main component CaO, SiO2、P2O5、Al2O3Between hydration occurs, can effectively subtract
The heat of hydration of lightweight concrete early period, can reduce or prevent concrete thermal cracking.On the other hand, due to CaO content in phosphorus ore slag
It is higher, therefore, it can also have an effect with flyash, ardealite, magnesia components, generate corresponding hydrated calcium silicate, aquation
The substances such as calcium aluminate, aquation calcium sulfate, calcium sulphoaluminate, periclase improve the hydrated minerals content in anti-cracking agent, and then significantly mention
The intensity and cracking resistance of high concrete.
It in a preferred embodiment, is in terms of 100% by the gross weight of the phosphorus ore slag, wherein SiO2Weight percentage be
The weight percentage of >=20%, CaO are >=30%.
In anti-cracking agent of the embodiment of the present invention, in order to balance the phosphorus ore slag in above-mentioned both sides function, as specific reality
Example is applied, the parts by weight of phosphorus ore slag are 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 in the concrete anti-cracking agent
Part, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts etc..
In the embodiment of the present invention, since four kinds of flyash, ardealite, phosphorus ore slag and magnesia components all pass through high temperature
Calcining, therefore, after the anti-cracking agent is added in concrete, due to hydrated minerals such as hydrated calcium silicate, drated calcium aluminate, water
Changing calcium sulfate etc. can react with the calcium hydroxide gel being precipitated when hydrated cementitious in concrete, generate different insoluble
In a variety of hydrated minerals of water, thus significantly improve the crack resistance of the crushing resistance of concrete, density, stability and concrete,
Impervious and durability.In addition, effective combination of four kinds of components, so that active constituent have complementary advantages and rationally in concrete
Effectively recombination.In this way, not only met the needs of concrete early hydration mineral, but also later concrete shrinkage-compensating and strong is ensured
The growth of degree can improve the anti crack performance of concrete on the basis of effectively guaranteeing concrete strength.
In the embodiment of the present invention, the partial size of concrete anti-cracking agent is smaller, and specific surface area is accordingly bigger.Due to commonly using water
The specific surface area of mud is about 300m2/ kg or so is beneficial to fill concrete when the specific surface area of anti-cracking agent is bigger than cement
In cement-particle size gap, enhance concrete density；In addition, the size of the specific surface area of anti-cracking agent directly affect its aquation into
Journey, specific surface area is bigger, and aquation is faster, on the contrary then slower.In the embodiment of the present invention, hydration time or expansion rate are effectively controlled,
Exceptionally except the group by rational allocation anti-cracking agent, the control of reasonable specific surface area is also anti-cracking agent technical requirements key point.
In view of this, as a preferred embodiment, specific surface area >=500m of the concrete anti-cracking agent2/kg。
Anti-cracking agent described in the embodiment of the present invention can reduce hydration heat of cement, slow down heat evolution velocity, reduce cement heat release
Amount postpones exothermic peak time of occurrence, concrete cement heat release can also be made gentler, cement performance is made to change.Cause
Also there is micro-expansion characteristics for the anti-cracking agent, therefore, the anti-cracking agent is added in high-heat cement, can be made in modified cement
Hot micro-expansion cement；The waterproofing and anti-leakage agent is added in moderate heat cement, modified cement low heat micro expanding cement can be made.
After anti-cracking agent described in the embodiment of the present invention replaces part of cement, concrete strength still is able to meet design requirement.
Therefore, in mass concrete, the cement consumption of concrete can be greatly lowered, to reduce hydration heat of cement, improve
Anti-cracking concrete performance, further satisfaction its higher antiseepage, anticorrosion, stability and life requirement.
Concrete anti-cracking agent of the invention can be directly incorporated into cement concrete according to determining dosage, with cement, water
And uniformly mix uses for sand, stone etc..
Anti-cracking agent provided in an embodiment of the present invention, using industrial residue flyash, ardealite, phosphorus ore slag and magnesia conduct
Component makes full use of industrial residue so that it is turned waste into wealth as regenerated resources, has both solved flyash, ardealite and phosphorus ore slag
Discharge reduces production cost to pollution caused by environment, it is often more important that the heat of hydration, the thermal energy for reducing concrete are swollen
Swollen property can make concrete achieve the purpose that microdilatancy or not shrink or shrink less, improve the high temperature resistance of concrete, mitigation
Grain separation and bleed phenomenon, reduce contraction and the cracking of concrete, inhibit corrosion of the stray electrical current to reinforcement in concrete, favorably
In raising anti-cracking concrete, impervious, freezing tolerance.Meanwhile anti-cracking agent described in the embodiment of the present invention can also improve the sum of concrete
Easy property and pumpability, it is enhancing concrete cohesiveness, wrapped, isolate concrete not, slump free of losses, concrete keeps good
Good water retention property, mechanical property, deformation performance and the endurance quality of concrete significantly improve, and can improve large volume coagulation
The performances such as cracking resistance, impervious, resistance to compression, tension, anti-folding, wear-resistant, the against corrosion, antidetonation of soil.
Concrete anti-cracking agent described in the embodiment of the present invention can be prepared by following methods.
Correspondingly, the embodiment of the invention also provides a kind of preparation method of concrete anti-cracking agent, include the following steps:
Each component is weighed respectively with anticracking agent prescription according to concrete of the present invention, and above-mentioned each component is subjected to ball
Mill, mixed processing.
Specifically, the formula of above-mentioned concrete anti-cracking agent and each component preferred content in formula and type are for example above
Described, in order to save length, details are not described herein.The weighed each component is subjected to ball milling, mixed processing.By each component into
The equipment of row ball-milling treatment is unrestricted, and common ball mill in the art is used equally for the embodiment of the present invention.As preferred reality
Example is applied, the material after ball-milling treatment, specific surface area >=500 ㎡/㎏.The ball milling, mixed processing time can basis
Actual production conditions carry out flexibly adjustment, as long as each component ball milling, mixing are sufficiently, such as mixed equipment can be mixing
Tank etc..In above-mentioned ball milling, mixing, material can be subjected to dust suction processing, reduce material dust, and it is discharged through exhaust outlet
And it recycles.In a particular embodiment, it can will be delivered to warehouse for finished product through high-pressure delivery machine through ball milling, mixed mixing, will be formed mixed
Solidifying soil waterproofing and anti-leakage agent finished product.
The preparation method for the concrete anti-cracking agent that this implementation embodiment provides, low in cost, simple process is controllable, is easy
Realize industrialized development.
And concrete of the present invention can be used as concrete admixture or anti-cracking concrete admixture application with anti-cracking agent.
In some embodiments, when concrete uses anti-cracking agent as concrete admixture in application, with concrete glue material use
The gross weight of amount is 100% calculating, and the weight percentage that the anti-cracking agent accounts for concrete glue material gross weight is 8-12%.
When concrete uses anti-cracking agent as concrete admixture in application, when concrete uses anti-cracking agent as anti-cracking concrete
Admixture is in application, be 100% calculating with the gross weight of concrete cement amount, the anti-cracking agent accounts for the weight of concrete glue material gross weight
Amount percentage composition is 10-50%.
It is illustrated combined with specific embodiments below.
Embodiment 1
A kind of concrete anti-cracking agent, the following component including following parts by weight:
Embodiment 2
A kind of concrete anti-cracking agent, the following component including following parts by weight:
The preparation method of above-mentioned concrete anti-cracking agent, includes the following steps:
Each component is weighed respectively according to the formula of above-mentioned concrete anti-cracking agent；
Above-mentioned each component is subjected to ball milling, mixed processing.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of concrete anti-cracking agent, which is characterized in that the following component including following parts by weight:
Wherein, the source of the ardealite are as follows: phosphoric acid is prepared using sulfuric acid treating phosphorite, collects solid produced during the preparation process
The solid slag is carried out high-temperature calcination under conditions of temperature is 800 DEG C~1000 DEG C, the phosphorus stone is prepared by waste residue
Cream.
2. concrete anti-cracking agent as described in claim 1, which is characterized in that the quality of the ardealite and the magnesia
Than being about 55~65:35~45.
3. concrete anti-cracking agent as described in claim 1, which is characterized in that the quality of the ardealite and the magnesia
Than being about 6:4.
4. concrete anti-cracking agent as described in any one of claims 1-3, which is characterized in that the specific surface area of the ardealite
For 520~570m2/ kg, the specific surface area of the magnesia are 630~670m2/kg。
5. concrete anti-cracking agent as described in any one of claims 1-3, which is characterized in that the loss on ignition < of the flyash
8%, it is in terms of 100% by the gross weight of the flyash, wherein SiO2Weight percentage be >=30%, Al2O3Weight hundred
Dividing content is >=20%.
6. concrete anti-cracking agent as described in any one of claims 1-3, which is characterized in that the gross weight with the phosphorus ore slag is
100% meter, wherein SiO2Weight percentage be >=20%, CaO weight percentage be >=30%.
7. a kind of preparation method of concrete anti-cracking agent, includes the following steps:
Each component is weighed respectively with anticracking agent prescription according to concrete described in any one of claims 1-6, by above-mentioned each component
Carry out ball milling, mixed processing.
8. concrete described in any one of claims 1-6 can be used as concrete admixture with anti-cracking agent or anti-cracking concrete blends
Material application.
9. concrete as claimed in claim 8 uses anti-cracking agent as the application of concrete admixture, which is characterized in that with coagulation
The gross weight of native cement amount is 100% calculating, and the weight percentage that the anti-cracking agent accounts for concrete glue material gross weight is 8-10%.
10. concrete as claimed in claim 8 uses anti-cracking agent as the application of anti-cracking concrete admixture, which is characterized in that
It is 100% calculating with the gross weight of concrete cement amount, the weight percentage that the anti-cracking agent accounts for concrete glue material gross weight is
10-50%.
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