CN106348637A - Novel concrete retarder - Google Patents
Novel concrete retarder Download PDFInfo
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- CN106348637A CN106348637A CN201610696867.4A CN201610696867A CN106348637A CN 106348637 A CN106348637 A CN 106348637A CN 201610696867 A CN201610696867 A CN 201610696867A CN 106348637 A CN106348637 A CN 106348637A
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- parts
- water reducer
- sodium
- concrete retarder
- retarder
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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
-
- 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
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention disclsoes a novel concrete retarder. The novel concrete retarder is prepared from the following components in parts by weight: 2 to 5 parts of ammonium borate, 3 to 8 parts of sodium pyrophosphate, 4 to 9 parts of magnesium sulfate, 6 to 9 parts of diethylenetriaminepenta(methylenephosphonic) acid, 3 to 6 parts of sodium carboxymethyl cellulose, 1 to 4 parts of maltodextrin, 1 to 3 parts of sodium tartrate, 15 to 20 parts of palygorskite powder, 4 to 7 parts of a water reducing agent, 1 to 3 parts of a dispersant and 0.5 to 0.8 part of a surfactant. The novel concrete retarder provided by the invention has the advantages of excellent retarding effect, high strength, no pollution and the like, and is a concrete additive which has a very good development future.
Description
Technical field
The present invention relates to a kind of new concrete retarder, belong to technical field of concrete additives.
Background technology
Concrete admixture is conventional reagent in concrete preparation process, and not only volume is little, and can improve concrete
Performance, satisfaction is actually needed, and can also save cement simultaneously, the effects such as reducing energy consumption and reduce pollutant emission.Common is additional
Agent has: early strength agent, water reducer, air entraining agent, retarder etc..Wherein, retarder is a kind of to delay and reduce putting of hydrated cementitious
Thermal velocity, thus extending the time of concrete fully condensation, makes the fresh concrete long period keep plasticity, and convenient cast carries
Later concrete properties are not resulted in dysgenic additive by high efficiency of construction simultaneously.Therefore, retarder is in coagulation
Native field plays an important role.
At present, the retarder species on market is more, but can be divided into two big class by its chemical composition: inorganic retarder and
Organic retarder.Wherein, inorganic retarder mainly has: phosphate, zinc salt, iron sulfate, copper sulfate, borate, fluosilicate etc.；
Organic retarder includes: lignosulfonates, hydroxy carboxylic acid and its salt, polyhydric alcohol and its derivant, saccharide and carbohydrate
Deng.Inorganic retarder is ionized out ion and is reacted with hydrolysis product of cement, generates the thing of fine and close indissoluble in cement particle surface
Plasma membrane, it is normal hydrated to hinder cement, so that c3The forming process of the aquation of a and entringite (aft) is all delayed and plays
Deferred action；The complex that organic retarder contains forms base, in the alkaline medium of hydrated cementitious, with free ca2+Generate
Unstable complex, causes ca in liquid phase2+Mass concentration declines, and complex forms base and is likely to be adsorbed in cement granules simultaneously
O on surface and hydrated product surface2-Form hydrogen bond, and complex forms base and passes through hydrogen bond association with hydrone again, makes water
Mud particle surface forms one layer of more stable solvation moisture film, thus inhibiting hydrated cementitious process.
Although inorganic retarder and organic retarder all possess certain retarding effect, the performance of single retarder is also
It is very limited amount of, thus its range of application is inhibited on certain degree.In order to solve this technical problem, this area work
Make personnel and inorganic retarder and organic retarder are carried out compound research, and obtain certain Research Achievement, such as entitled " a kind of
The patent of compound retarder and preparation method thereof (Chinese patent application publication No.: cn105130240a) " discloses a kind of compound
Retarder and preparation method thereof, its described retarder is by 10～20 parts of sodium phosphate, 5～10 parts of aluminium hydroxide, sodium nitrite 4
～8 parts, 1～3 part of calcium titanate, 2～6 parts of maleic anhydride, 1～3 part of phosphine butane tricarboxylic acid, 1.5～2.8 parts of sucrose, saccharinic acid calcium 2
～5 parts, 0.2～0.8 part of cross-linked inhibitor, 4～10 parts of water is prepared from.Although it can obtain stronger retarding effect,
In concrete application aspect, especially concrete strength aspect can't be satisfactory.Additionally, the use of nitrate, easily produce
Raw no2Deng pollutant, air is polluted.Therefore, it is necessary for continuing to explore with research retarder.
Content of the invention
For retarder in above-mentioned prior art to the not enough technical problem of concrete strength aspect, the present invention will solve
Technical problem be to propose one kind to effectively improve retarding effect and intensity, and free of contamination new concrete retarder.
A kind of new concrete retarder, is made up of each component of following weight: 2～5 parts of ammonium borate, pyrophosphoric acid
3～8 parts of sodium, 4～9 parts of magnesium sulfate, 6～9 parts of diethylene triamine pentamethylene phosphonic, 3～6 parts of sodium carboxymethyl cellulose, Fructus Hordei Germinatus paste
1～4 part of essence, 1～3 part of sodium tartrate, 15～20 parts of Paligorskite powder, 4～7 parts of water reducer, 1～3 part of dispersant, surfactant
0.5～0.8 part.
Preferably,
A kind of new concrete retarder, is made up of each component of following weight: 3 parts of ammonium borate, sodium pyrophosphate 5
Part, 6 parts of magnesium sulfate, 8 parts of diethylene triamine pentamethylene phosphonic, 5 parts of sodium carboxymethyl cellulose, 3 parts of maltodextrin, sodium tartrate 2
Part, 18 parts of Paligorskite powder, 5 parts of water reducer, 2 parts of dispersant, 0.7 part of surfactant.
Described Paligorskite powder is to follow the steps below process:
1) add 5% polyvinyl alcohol (pva) pelletize in Paligorskite powder, and cross 60 mesh, obtain palygorskite particle；
2) by weight than for palygorskite particle: dehydrated alcohol: the material of zirconia ball=1:1:3 be placed in rotating speed be 200～
Ball milling on the ball mill of 300 turns/min, ball milling 4～6h；
3) sieve, dry, and with dry-pressing formed in the stainless steel mould, demoulding；And the sample after the demoulding is placed in 800～
1～2h is calcined in 900 DEG C of Muffle furnaces；
4) it is ground into 60～120 mesh powder body, and add 15～20% dehydrated alcohol, ball milling 6～8h；
5) drying to moisture content is 2～4%, fineness 200～300 mesh Paligorskite powder；
6) add 10～15% Ovum Gallus domesticus album, and high mixed on low speed；
7) 3～5% molasses are added, being placed in frequency is ultrasonic 10～15min on 20～30khz ultrasonic machine, you can obtain
Modified paligorskite powder.
Described water reducer is to be composited by 1～3 part of sulfamate water reducer and 4～8 parts of tapioca water reducers
, wherein, tapioca water reducer is to follow the steps below process:
First tapioca is configured to the aqueous solution starch milk that concentration is 30～35%, and is value 8～9 with alkali regulation ph,
Simultaneously under magnetic agitation state, by titrate in the way of add 1～3% hydrogen peroxide, at 40～50 DEG C water bath with thermostatic control oxidation 4～
5h；Then, 3～6% oxirane, evacuation are added, airtight, at 50～60 DEG C, baking oven is etherified 10～15h；Finally, plus 5～
8% acid alcohol solution, after stirring 1～2h, being placed in frequency is ultrasonic 20～30min on 20～40khz ultrasonic machine, filters, washing,
It is dried, you can obtain tapioca water reducer.
Described dispersant is sodium lauryl sulphate；Described surfactant is organic silicon surfactant.
Compared with prior art, the invention has the beneficial effects as follows:
1st, in inorganic retarder (ammonium borate, sodium pyrophosphate, magnesium sulfate) and organic retarder (diethylenetriamine five methene phosphine
Acid, sodium carboxymethyl cellulose, maltodextrin, sodium tartrate) on the basis of, also added Paligorskite powder, water reducer, dispersant and
Surfactant, can improve the retarding effect of new concrete retarder, can improve intensity again.
2nd, passing through modified paligorskite powder, Paligorskite powder specific surface area can be increased, thus increasing it to adsorb contact area, carrying
High absorption property.Its absorbability, can not only adsorb large quantity of moisture and form thicker water film, make crystal from contacting with each other
Shielding, changes structure-forming process, plays retarding effect, simultaneously moreover it is possible to adsorbing Ovum Gallus domesticus album and being stored in its duct or space
Interior, and when external environment changes, Ovum Gallus domesticus album is desorbed and discharges, thus playing controllability deferred action.Additionally, also
With the addition of molasses so that retarding effect more preferably.
3rd, tapioca obtains tapioca water reducer by oxidation, etherificate and acidifying.Tapioca water reducer not only has
There is diminishing function, also there is deferred action.This is because tapioca water reducer has carboxyl, hydroxyl, ether and highly branched chain, energy
Form larger sterically hindered, the deferred action of Concrete Structure, extend the time of concrete fully condensation, be conducive to aquation to produce
Being uniformly distributed of thing, thus the comprcssive strength of Concrete Structure；Meanwhile, tapioca branched fraction also continues to play diminishing work
With being conducive to cement to protect plasticity.Additionally, tapioca water reducer is a kind of nontoxic, free of contamination natural polymer concrete subtracting
Water preparation, compares other conventional water reducers, more economically economical, safe and reliable.
Specific embodiment
The present invention provides a kind of new concrete retarder, to achieve the object of the present invention, technical scheme and effect more
Clear, clear and definite, the present invention is described in more detail below.
A kind of new concrete retarder, is made up of each component of following weight: 2～5 parts of ammonium borate, pyrophosphoric acid
3～8 parts of sodium, 4～9 parts of magnesium sulfate, 6～9 parts of diethylene triamine pentamethylene phosphonic, 3～6 parts of sodium carboxymethyl cellulose, Fructus Hordei Germinatus paste
1～4 part of essence, 1～3 part of sodium tartrate, 15～20 parts of Paligorskite powder, 4～7 parts of water reducer, 1～3 part of dispersant, surfactant
0.5～0.8 part.
Described Paligorskite powder is to follow the steps below process:
1) add 5% polyvinyl alcohol (pva) pelletize in Paligorskite powder, and cross 60 mesh, obtain palygorskite particle；
2) by weight than for palygorskite particle: dehydrated alcohol: the material of zirconia ball=1:1:3 be placed in rotating speed be 200～
Ball milling on the ball mill of 300 turns/min, ball milling 4～6h；
3) sieve, dry, and with dry-pressing formed in the stainless steel mould, demoulding；And the sample after the demoulding is placed in 800～
1～2h is calcined in 900 DEG C of Muffle furnaces；
4) it is ground into 60～120 mesh powder body, and add 15～20% dehydrated alcohol, ball milling 6～8h；
5) drying to moisture content is 2～4%, fineness 200～300 mesh Paligorskite powder；
6) add 10～15% Ovum Gallus domesticus album, and high mixed on low speed；
7) 3～5% molasses are added, being placed in frequency is ultrasonic 10～15min on 20～30khz ultrasonic machine, you can obtain
Modified paligorskite powder.
Described water reducer is to be composited by 1～3 part of sulfamate water reducer and 4～8 parts of tapioca water reducers
, wherein, tapioca water reducer is to follow the steps below process:
First tapioca is configured to the aqueous solution starch milk that concentration is 30～35%, and is value 8～9 with alkali regulation ph,
Simultaneously under magnetic agitation state, by titrate in the way of add 1～3% hydrogen peroxide, at 40～50 DEG C water bath with thermostatic control oxidation 4～
5h；Then, 3～6% oxirane, evacuation are added, airtight, at 50～60 DEG C, baking oven is etherified 10～15h；Finally, plus 5～
8% acid alcohol solution, after stirring 1～2h, being placed in frequency is ultrasonic 20～30min on 20～40khz ultrasonic machine, filters, washing,
It is dried, you can obtain tapioca water reducer.
Described dispersant is sodium lauryl sulphate；Described surfactant is organic silicon surfactant.
Embodiment 1
A kind of new concrete retarder, is made up of each component of following weight: 3 parts of ammonium borate, sodium pyrophosphate 5
Part, 6 parts of magnesium sulfate, 8 parts of diethylene triamine pentamethylene phosphonic, 5 parts of sodium carboxymethyl cellulose, 3 parts of maltodextrin, sodium tartrate 2
Part, 18 parts of Paligorskite powder, 5 parts of water reducer, 2 parts of dispersant, 0.7 part of surfactant.
Embodiment 2
A kind of new concrete retarder, is made up of each component of following weight: 5 parts of ammonium borate, sodium pyrophosphate 8
Part, 9 parts of magnesium sulfate, 9 parts of diethylene triamine pentamethylene phosphonic, 6 parts of sodium carboxymethyl cellulose, 4 parts of maltodextrin, sodium tartrate 3
Part, 20 parts of Paligorskite powder, 7 parts of water reducer, 3 parts of dispersant, 0.8 part of surfactant.
Embodiment 3
A kind of new concrete retarder, is made up of each component of following weight: 2 parts of ammonium borate, sodium pyrophosphate 3
Part, 4 parts of magnesium sulfate, 6 parts of diethylene triamine pentamethylene phosphonic, 3 parts of sodium carboxymethyl cellulose, 1 part of maltodextrin, sodium tartrate 1
Part, 15 parts of Paligorskite powder, 4 parts of water reducer, 1 part of dispersant, 0.5 part of surfactant.
Comparative example 1 (comparative example 1 is only that with the difference of embodiment 1, the Paligorskite powder in comparative example 1 not through processing,
But directly use, remaining is with embodiment 1).
(comparative example 2 is only that comparative example 2 with the difference of embodiment 1, and the water reducer in comparative example 2 subtracts for sulfamate
Water preparation, remaining is with embodiment 1).
(comparative example 3 is only that comparative example 3 with the difference of embodiment 1, and the water reducer in comparative example 3 is tapioca diminishing
Agent, remaining is with embodiment 1).
The new concrete retarder that above-described embodiment 1-3 and comparative example 1-3 are obtained carries out slow setting using prior art
Effect and intensity test, test result is as shown in table 1 below:
Table 1 retarding effect and intensity test result
Certainly, it is that the preferred embodiments of the disclosure is described in detail above, not the present invention is limited with this
Practical range, the equivalence changes that all principles under this invention, construction and structure are made, the protection of the present invention all should be covered by
In the range of.
Claims (5)
1. a kind of new concrete retarder it is characterised in that: be made up of each component of following weight: ammonium borate 2～5
Part, 3～8 parts of sodium pyrophosphate, 4～9 parts of magnesium sulfate, 6～9 parts of diethylene triamine pentamethylene phosphonic, sodium carboxymethyl cellulose 3～6
Part, 1～4 part of maltodextrin, 1～3 part of sodium tartrate, 15～20 parts of Paligorskite powder, 4～7 parts of water reducer, 1～3 part of dispersant,
0.5～0.8 part of surfactant.
2. new concrete retarder according to claim 1 it is characterised in that: by each component of following weight
Make: 3 parts of ammonium borate, 5 parts of sodium pyrophosphate, 6 parts of magnesium sulfate, 8 parts of diethylene triamine pentamethylene phosphonic, sodium carboxymethyl cellulose 5
Part, 3 parts of maltodextrin, 2 parts of sodium tartrate, 18 parts of Paligorskite powder, 5 parts of water reducer, 2 parts of dispersant, 0.7 part of surfactant.
3. new concrete retarder according to claim 1 it is characterised in that: described Paligorskite powder is according to following
Step is processed:
1) add 5% polyvinyl alcohol (pva) pelletize in Paligorskite powder, and cross 60 mesh, obtain palygorskite particle；
2) by weight than for palygorskite particle: dehydrated alcohol: it is 200～300 that the material of zirconia ball=1:1:3 is placed in rotating speed
Turn/ball mill of min on ball milling, ball milling 4～6h；
3) sieve, dry, and with dry-pressing formed in the stainless steel mould, demoulding；And the sample after the demoulding is placed in 800～900 DEG C
1～2h is calcined in Muffle furnace；
4) it is ground into 60～120 mesh powder body, and add 15～20% dehydrated alcohol, ball milling 6～8h；
5) drying to moisture content is 2～4%, fineness 200～300 mesh Paligorskite powder；
6) add 10～15% Ovum Gallus domesticus album, and high mixed on low speed；
7) 3～5% molasses are added, being placed in frequency is ultrasonic 10～15min on 20～30khz ultrasonic machine, you can obtain modification
Paligorskite powder.
4. new concrete retarder according to claim 1 it is characterised in that: described water reducer is by 1～3 part of ammonia
Base sulfonate water reducer and 4～8 parts of tapioca water reducers are composited, and wherein, tapioca water reducer is according to following
Step is processed:
First tapioca is configured to the aqueous solution starch milk that concentration is 30～35%, and is value 8～9 with alkali regulation ph, simultaneously
Under magnetic agitation state, in the way of titrating, add 1～3% hydrogen peroxide, water bath with thermostatic control at 40～50 DEG C aoxidizes 4～5h；
Then, 3～6% oxirane, evacuation are added, airtight, at 50～60 DEG C, baking oven is etherified 10～15h；Finally, plus 5～8%
Acid alcohol solution, stirring 1～2h after, be placed in frequency be 20～40khz ultrasonic machine on ultrasonic 20～30min, filter, washing, do
Dry, you can to obtain tapioca water reducer.
5. new concrete retarder according to claim 1 it is characterised in that: described dispersant be dodecyl sulfur
Sour sodium；Described surfactant is organic silicon surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610696867.4A CN106348637B (en) | 2016-08-19 | 2016-08-19 | Concrete retarder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610696867.4A CN106348637B (en) | 2016-08-19 | 2016-08-19 | Concrete retarder |
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| CN106348637B CN106348637B (en) | 2018-10-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107674135A (en) * | 2017-10-31 | 2018-02-09 | 安徽森普新型材料发展有限公司 | A kind of macromolecular retarder, its preparation method and application |
| CN110157446A (en) * | 2019-05-13 | 2019-08-23 | 中铁第五勘察设计院集团有限公司 | A kind of dispersing agent and preparation method thereof for improveing clay |
| CN111704388A (en) * | 2020-06-11 | 2020-09-25 | 贵州凯襄新材料有限公司 | Concrete retarder and preparation method thereof |
| CN112047662A (en) * | 2020-08-25 | 2020-12-08 | 北京金隅水泥节能科技有限公司 | Retarder and production process and application thereof |
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| CN105503027A (en) * | 2016-01-05 | 2016-04-20 | 萧县良宇混凝土有限责任公司 | High-permeable retardation type concrete additive and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107674135A (en) * | 2017-10-31 | 2018-02-09 | 安徽森普新型材料发展有限公司 | A kind of macromolecular retarder, its preparation method and application |
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| CN110157446A (en) * | 2019-05-13 | 2019-08-23 | 中铁第五勘察设计院集团有限公司 | A kind of dispersing agent and preparation method thereof for improveing clay |
| CN111704388A (en) * | 2020-06-11 | 2020-09-25 | 贵州凯襄新材料有限公司 | Concrete retarder and preparation method thereof |
| CN112047662A (en) * | 2020-08-25 | 2020-12-08 | 北京金隅水泥节能科技有限公司 | Retarder and production process and application thereof |
| CN112047662B (en) * | 2020-08-25 | 2021-06-18 | 北京金隅水泥节能科技有限公司 | Retarder and production process and application thereof |
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| Publication number | Publication date |
|---|---|
| CN106348637B (en) | 2018-10-30 |
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