CN106830734B - It is a kind of for produce it is non-evaporating pressure self-insulating light concrete segment rapid hardening reinforcing agent preparation method and rapid hardening reinforcing agent - Google Patents
It is a kind of for produce it is non-evaporating pressure self-insulating light concrete segment rapid hardening reinforcing agent preparation method and rapid hardening reinforcing agent Download PDFInfo
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- CN106830734B CN106830734B CN201611258364.5A CN201611258364A CN106830734B CN 106830734 B CN106830734 B CN 106830734B CN 201611258364 A CN201611258364 A CN 201611258364A CN 106830734 B CN106830734 B CN 106830734B
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- reinforcing agent
- rapid hardening
- aluminium
- hardening reinforcing
- nitrilotriacetic acid
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/18—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C229/06—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton
- C07C229/10—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
- C07C229/16—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings to carbon atoms of hydrocarbon radicals substituted by amino or carboxyl groups, e.g. ethylenediamine-tetra-acetic acid, iminodiacetic acids
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of for producing the rapid hardening reinforcing agent preparation method and rapid hardening reinforcing agent of non-evaporating pressure self-insulating light concrete segment: 1, the aluminium hydroxide that aluminum sulfate react with sodium hydroxide to generation is mixed with suitable nitrilotriacetic acid, obtained nitrilotriacetic acid hydrogen aluminium；2, nitrilotriacetic acid hydrogen aluminium is dissolved in the solution that aluminium content 6% is made in sig water, just obtains the rapid hardening reinforcing agent for being suitable for non-evaporating pressure self-insulating light concrete segment production.1.5% rapid hardening reinforcing agent of cement amount is added, the concrete initial set time can be reduced to 5min or so, and final setting time is reduced within 80min.28 days compression strength of concrete improves 25% or so.
Description
Technical field
The present invention relates to energy saving building material technical fields, and in particular to one kind is mixed for producing non-evaporating pressure self-insulating light
The additive and preparation method thereof of solidifying earth building blocks.
Background technique
Self-insulating light concrete segment has the characteristics that fire resisting fire prevention, insulation, lightweight, antidetonation, be by cement,
Gather materials, chemical foaming agent, foam stabiliser etc. are stirred, a kind of novel light bubble with self-insurance temperature function of moulding by casting
Foam energy-saving building blocks.This new type block is light-weight, good heat insulating, and soundproof effect is good, can substantially reduce building cost and room
The use cost in room is one of the novel wall material that state key is promoted.In addition, gathering materials in this building block can largely utilize
The industrial wastes such as flyash, slag, mountain flour can be effectively improved ecological condition, protecting ecology ring to reduce waste discharge
Border.
The production of non-evaporating pressure self-insulating light concrete segment needs the concrete initial set time shorter, and optimal state is
Foaming agent is pre-hardening immediately when completing foaming and completing to be poured, and concrete loses flowability, and foam institute can be effectively fixed in this way
The volume occupied avoids lather collapse or causes lower density on concrete block different compared with heavy aggregate decline.
In the case where no additive, the silicate concrete presetting period generally at 1 hour or so, so long initial set
Time is not able to satisfy the needs of lightweight concrete building block production, it is necessary to add efficient accelerator to shorten the presetting period.
Accelerator currently used for gunite concrete generally has alkaline accelerator and an alkali-free quick-coagulant, alkaline accelerator be by
The raw materials such as lime, industrial sodium aluminate, alkali carbonate and silicate are formed through calcining grinding, have that the rapid hardening time is short, price
Low advantage, the disadvantage is that dosage is larger, and later strength loss is big etc..
Alkali-free quick-coagulant is mainly the compound of aluminum sulfate, such as aluminum sulfate and the compound of calcium chloride etc..It is mainly lacked
Point is that stability is poor, dosage is big, later strength decline is larger.
It is analyzed according to mechanism of cement hydration it is found that the component for influencing initial setting strength in cement is C3A content, but silicate cement
C in mud3The content of A is certain, excessively high C3A content can reduce concrete strength, so cannot be by increasing C3A content
Method reduces the presetting period.
C can be increased by reducing aquation generation calcium hydroxide content3S hydration rate, can also be improved late strength of concrete.
Aluminum sulfate has preferable rapid hardening effect, and mechanism is that aluminium ion generates aluminate, Jin Eryu under alkaline condition
The webbed entringite of free calcium ions shape reduces the mobility of concrete and reaches initial set.But aluminum sulfate accelerator lacks
Point is affected to later strength.
As seen from the above analysis, hydration reaction can be accelerated by reducing the calcium ion concentration that concrete hydrating process generates
Speed, and improve late strength of concrete.In addition, the reticular structure formed on certain forms can reduce concrete flowability
And reaching initial set, research has shown that this reticular structure does not influence the later strength of concrete, thus is a kind of ideal speed
Solidifying mechanism.
Summary of the invention
The present invention devises a kind of rapid hardening agent molecule for having rapid hardening and humidification concurrently, i.e. nitrilotriacetic acid hydrogen aluminium.Its property shown
Formula is as follows:
With calcium hydroxide metathesis reaction occurs for nitrilotriacetic acid hydrogen aluminium in concrete mortar, generates using calcium ion as bridge
On the one hand cross-linked network consumes calcium hydroxide, improve the hydration rate of C3S, while improving the later period of concrete
Intensity.On the other hand, cross-linked network reduces concrete flowability, reaches pre-hardening state.
Aluminium ion in nitrilotriacetic acid hydrogen aluminium firstly generates aluminate under alkaline condition, is then formed with free calcium ions
Netted entringite and the initial set for having promoted concrete pre-hardening.Since the aluminium ion of addition is less, so to the later period of concrete
Intensity effect is smaller.
Particular content of the invention is as follows:
The synthesis of nitrilotriacetic acid hydrogen aluminium
Synthesis mechanism
Al2(SO4)3+6NaOH→2Al(OH)3+3Na2SO4
The specific scheme is that
1) aluminum sulfate is reacted to the aluminium hydroxide generated and nitrilotriacetic acid hybrid reaction with sodium hydroxide, nitrilotriacetic acid is made
Hydrogen aluminium；
2) nitrilotriacetic acid hydrogen aluminium is dissolved in sig water and the solution that the mass fraction of aluminium element is 2-10% is made, just fitted
Rapid hardening reinforcing agent for non-evaporating pressure self-insulating light concrete segment production.
Preferably, the mass fraction of aluminium element is 5-7% in rapid hardening reinforcing agent.
Preferably, aluminium content is 6% in rapid hardening reinforcing agent.
Preferably, nitrilotriacetic acid hydrogen aluminium used synthesizes by the following method: hydrogen will be added in aluminum sulfate aqueous solution
Sodium oxide molybdena obtains aluminium hydroxide, is mixed and made into aluminum hydroxide suspension with water after aluminium hydroxide is washed, above-mentioned to pH5-6
The nitrilotriacetic acid of 2 times of moles of aluminium hydroxide is added in suspension, stirring and dissolving at 50 DEG C is reacted 1 hour, evaporating water obtains
To nitrilotriacetic acid hydrogen aluminium.
Preferably, use nitrilotriacetic acid hydrogen aluminium for the main active of rapid hardening reinforcing agent；Synthesize nitrilotriacetic acid hydrogen aluminium
Raw material is aluminum sulfate.
The present invention also provides what is prepared according to any of the above-described method to be used to produce non-evaporating pressure self-insulating light concrete segment
Rapid hardening reinforcing agent.
The rapid hardening reinforcing agent can make 28 days compression strength of concrete improve 25%.The accelerator is for producing
Non-evaporating pressure self-insulating light concrete segment, additive amount of the accelerator in concrete are the 0.1-3% of cement quality, preferably
1-2%.
Advantages of the present invention is as follows:
1, rapid hardening reinforcing agent synthesis technology is simple, and raw material is easy to get, and is suitable for large-scale industrial production.
2, rapid hardening effect is good, and 1.5% additive amount just can make the concrete initial set time reach 5min, and final setting time reaches
80min meets the needs of non-evaporating pressure self-insulating light concrete segment industrialized production.
3, the late strength of concrete of rapid hardening does not reduce not only, and increases, and is answering better than all in the market
Concrete accelerator.
Specific embodiment
Embodiment below is particular content in order to further illustrate the present invention, but practical range and implementation of the invention
Method is not limited to description given below.
Embodiment 1
Industrial aluminum sulphate 700g (about 1mol), is dissolved in 1000ml water, is heated to 80 DEG C, and 10%NaOH aqueous solution is added dropwise extremely
System pH value is to neutrality, and there is no precipitatings to generate.It places 24 hours, pours out supernatant, add 1000ml water washing two
It is secondary, supernatant is equally poured out, aluminum hydroxide suspension is obtained.
400g nitrilotriacetic acid is added portionwise in above-mentioned suspension, stirring and dissolving at 50 DEG C reacts 1 hour, moisture is evaporated off
, obtain white solid 380g.
Nitrilotriacetic acid hydrogen aluminium obtained is dissolved in 5% sodium hydroxide solution, so that aluminium content is reached 6%, is just applicable in
In the rapid hardening reinforcing agent of non-evaporating pressure self-insulating light concrete segment production, it is labeled as SZ-1.
Embodiment 2
All operations are same as Example 1, and the rapid hardening reinforcing agent aluminium content being only made into is 2%, the rapid hardening reinforcing agent mark
It is denoted as SZ-2.
Embodiment 3
All operations are same as Example 1, and the rapid hardening reinforcing agent aluminium content being only made into is 4%, the rapid hardening reinforcing agent mark
It is denoted as SZ-3.
Embodiment 4
All operations are same as Example 1, and the rapid hardening reinforcing agent aluminium content being only made into is 8%, the rapid hardening reinforcing agent mark
It is denoted as SZ-4.
Embodiment 5
All operations are same as Example 1, and the rapid hardening reinforcing agent aluminium content being only made into is 10%, the rapid hardening reinforcing agent mark
It is denoted as SZ-5.
Embodiment 6
Standard concrete formula: No. 425 cement 400g, 20-40 mesh river sand 300g, flyash 350g, water 350g are placed in
It is stirred evenly in 1000ml beaker and obtains standard concrete mortar.The compound foam stabilizer of 1.5g is added, 1.5% SZ-1 rapid hardening increases
Strong agent (adding meter with cement), is added the hydrogen peroxide that 20g concentration is 27%, 0.2g catalysis in 40 DEG C of waters bath with thermostatic control after constant temperature
Agent is placed after being vigorously stirred.Compression strength is after the measurement presetting period is 5min, final setting time 80min, room temperature conserve 28 days
4.0Kg/cm2。
Embodiment 7
All operations are same as Example 6, and only the additional amount of SZ-1 rapid hardening reinforcing agent is changed to 1%, measure the presetting period
For 22min, final setting time 120min, compression strength is 3.8Kg/cm after room temperature maintenance 28 days2。
Embodiment 8
All operations are same as Example 6, and only the additional amount of SZ-1 rapid hardening reinforcing agent is changed to 0.5%, when measurement is pre-hardening
Between be 31min, final setting time 140min, room temperature conserve 28 days after compression strength be 3.4Kg/cm2。
Embodiment 9
All operations are same as Example 6, and only the additional amount of SZ-1 rapid hardening reinforcing agent is changed to 0.1%, when measurement is pre-hardening
Between be 25min, final setting time 160min, room temperature conserve 28 days after compression strength be 3.2Kg/cm2。
Embodiment 10
All operations are same as Example 6, and only the additional amount of SZ-1 rapid hardening reinforcing agent is changed to 2%, measure the presetting period
For 4min, final setting time 65min, compression strength is 3.9Kg/cm after room temperature maintenance 28 days2。
Embodiment 11
All operations are same as Example 6, and only the additional amount of SZ-1 rapid hardening reinforcing agent is changed to 2.5%, when measurement is pre-hardening
Between be 3min, final setting time 55min, room temperature conserve 28 days after compression strength be 3.7Kg/cm2。
Embodiment 12
All operations are same as Example 6, and only the additional amount of SZ-1 rapid hardening reinforcing agent is changed to 3%, measure the presetting period
For 3min, final setting time 50min, compression strength is 3.5Kg/cm after room temperature maintenance 28 days2。
Embodiment 13
All operations are same as Example 6, only substitute SZ-1 rapid hardening reinforcing agent using SZ-2 rapid hardening reinforcing agent, are added
Amount is 1.5%, and compression strength is after the measurement presetting period is 20min, final setting time 170min, room temperature conserve 28 days
3.5Kg/cm2。
Embodiment 14
All operations are identical as embodiment 13, and only the additional amount of SZ-2 rapid hardening reinforcing agent is changed to 3%, measure the presetting period
For 14min, final setting time 140min, compression strength is 3.9Kg/cm after room temperature maintenance 28 days2。
Embodiment 15
All operations are same as Example 6, only substitute SZ-1 rapid hardening reinforcing agent using SZ-3 rapid hardening reinforcing agent, are added
Amount is 1.5%, and compression strength is after the measurement presetting period is 17min, final setting time 130min, room temperature conserve 28 days
3.5Kg/cm2。
Embodiment 16
All operations are same as Example 6, only substitute SZ-1 rapid hardening reinforcing agent using SZ-4 rapid hardening reinforcing agent, are added
Amount is 1.5%, and compression strength is 3.9Kg/ after the measurement presetting period is 4min, final setting time 70min, room temperature conserve 28 days
cm2。
Embodiment 17
All operations are same as Example 6, only substitute SZ-1 rapid hardening reinforcing agent using SZ-5 rapid hardening reinforcing agent, are added
Amount is 1.5%, and compression strength is 3.7Kg/ after the measurement presetting period is 3min, final setting time 60min, room temperature conserve 28 days
cm2。
Embodiment 18
All operations are same as Example 6, rapid hardening reinforcing agent do not used only, when the measurement presetting period is 30min, final set
Between be 190min, room temperature conserve 28 days after compression strength be 3.0Kg/cm2。
Claims (4)
1. a kind of for producing the rapid hardening reinforcing agent preparation method of non-evaporating pressure self-insulating light concrete segment, it is characterised in that:
The following steps are included: 1) aluminum sulfate to be reacted to the aluminium hydroxide generated and nitrilotriacetic acid hybrid reaction with sodium hydroxide, ammonia is made
Triacetic acid hydrogen aluminium；2) three second hydracid aluminium of ammonia is dissolved in sig water and the solution that the mass fraction of aluminium element is 2-10% is made, it must
To the rapid hardening reinforcing agent for being suitable for non-evaporating pressure self-insulating light concrete segment production；Nitrilotriacetic acid hydrogen aluminium used is by following
Method synthesis: sodium hydroxide will be added in aluminum sulfate aqueous solution to pH5-6, obtain aluminium hydroxide, aluminium hydroxide is washed
It is mixed and made into aluminum hydroxide suspension with water afterwards, the nitrilotriacetic acid of addition 2 times of moles of aluminium hydroxide in above-mentioned suspension, 50
Stirring and dissolving at DEG C is reacted 1 hour, and evaporating water obtains nitrilotriacetic acid hydrogen aluminium.
2. according to claim 1 for producing the rapid hardening reinforcing agent preparation side of non-evaporating pressure self-insulating light concrete segment
Method, it is characterised in that: the mass fraction of aluminium element is 5-7% in rapid hardening reinforcing agent.
3. according to claim 1 for producing the rapid hardening reinforcing agent preparation side of non-evaporating pressure self-insulating light concrete segment
Method, it is characterised in that: aluminium content is 6% in rapid hardening reinforcing agent.
4. according to claim 1 for producing the rapid hardening reinforcing agent preparation side of non-evaporating pressure self-insulating light concrete segment
Method, it is characterised in that: use nitrilotriacetic acid hydrogen aluminium for the main active of rapid hardening reinforcing agent；Synthesize the original of nitrilotriacetic acid hydrogen aluminium
Material is aluminum sulfate.
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| CN201611258364.5A CN106830734B (en) | 2016-12-30 | 2016-12-30 | It is a kind of for produce it is non-evaporating pressure self-insulating light concrete segment rapid hardening reinforcing agent preparation method and rapid hardening reinforcing agent |
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| CN201611258364.5A CN106830734B (en) | 2016-12-30 | 2016-12-30 | It is a kind of for produce it is non-evaporating pressure self-insulating light concrete segment rapid hardening reinforcing agent preparation method and rapid hardening reinforcing agent |
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| Publication Number | Publication Date |
|---|---|
| CN106830734A CN106830734A (en) | 2017-06-13 |
| CN106830734B true CN106830734B (en) | 2019-07-23 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103493220A (en) * | 2011-03-08 | 2014-01-01 | 默克专利股份有限公司 | Aluminium oxide pastes and method for the use thereof |
| CN104446090A (en) * | 2014-12-08 | 2015-03-25 | 江苏奥莱特新材料有限公司 | Durable alkali-free liquid setting accelerator and preparation method thereof |
| CN106220030A (en) * | 2016-08-08 | 2016-12-14 | 合肥永佳新材料科技有限公司 | A kind of anti-chamotte mould cement water reducing agent and preparation method thereof |
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2016
- 2016-12-30 CN CN201611258364.5A patent/CN106830734B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103493220A (en) * | 2011-03-08 | 2014-01-01 | 默克专利股份有限公司 | Aluminium oxide pastes and method for the use thereof |
| CN104446090A (en) * | 2014-12-08 | 2015-03-25 | 江苏奥莱特新材料有限公司 | Durable alkali-free liquid setting accelerator and preparation method thereof |
| CN106220030A (en) * | 2016-08-08 | 2016-12-14 | 合肥永佳新材料科技有限公司 | A kind of anti-chamotte mould cement water reducing agent and preparation method thereof |
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