CN1073669A - Dispersion resistant additive of underwater concrete and manufacture method thereof - Google Patents
Dispersion resistant additive of underwater concrete and manufacture method thereof Download PDFInfo
- Publication number
- CN1073669A CN1073669A CN 91111809 CN91111809A CN1073669A CN 1073669 A CN1073669 A CN 1073669A CN 91111809 CN91111809 CN 91111809 CN 91111809 A CN91111809 A CN 91111809A CN 1073669 A CN1073669 A CN 1073669A
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- Prior art keywords
- underwater concrete
- resistant additive
- cellulose
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- ether
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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
- 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
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a kind of dispersion resistant additive of underwater concrete and manufacture method thereof.Contain ether of cellulose, silicon magnesium stone fiber, propanediol polyoxypropylene polyoxyethylene ether defoaming agent, calcium sulphoaluminate, sodium aluminate etc.Adopt paddle type mill pulverizing silicon magnesium stone fiber manufacture method and elder generation to spray into treatment processs such as ether of cellulose with defoamer.Have that material cost is low, processing advantages such as easy, anti-dispersive ability is strong, can be used under water casting and constructing on the coagulation.
Description
The present invention relates to a kind of dispersion resistant additive of underwater concrete and manufacture method thereof, it belongs to cement additive and method field of manufacturing thereof, contains main components such as ether of cellulose.
In the past, when carrying out pouring concrete construction under water, the lost quality that influences underwater concrete owing to cement component and cement additive also causes the pollution in waters on every side in addition.
Japan publication JP58-49650 discloses a kind of dispersion resistant additive of underwater concrete that contains polyacrylamide and humite breeze, its objective is the anti-dispersiveness that adopts the humite powder to increase underwater concrete, its weak point is to adopt wet milling process to grind humite can not obtain long thin shape silicon magnesium stone fiber, thereby can not improve the anti-dispersiveness of underwater concrete effectively, in addition owing to also need drying, cost height after the wet-milling.Japan publication JP58-115051 discloses a kind of dispersion resistant additive of underwater concrete of cellulose ethers, adopt muriate to improve the early strength of underwater concrete, its weak point be muriate to the reinforcing bars rusting effect, early strength improves not remarkable in addition.For the dispersion of resisting cement in the underwater concreting is run off, adopt dispersion resistant additive of underwater concrete such as cellulose ethers, disclose the dispersion resistant additive of underwater concrete that a kind of ether of cellulose and polyacrylamide are formed as Japanese publication JP63-206344, its objective is that overcoming ether of cellulose with the adding polyacrylamide makes cement setting reach the low shortcoming of early stage intensity slowly.Its weak point is that effect is very not remarkable, and price is higher.In addition, above-mentioned existing patent, its underwater concrete sclerosis post shrinkage filling properties is bad.
The objective of the invention is to avoid the weak point of above-mentioned prior art and provide a kind of and make that the anti-dispersive ability of underwater concrete is strong, early strength is high, fillibility good, reinforcing bar is not produced corrosion, easy construction, a kind of dispersion resistant additive of underwater concrete and manufacture method thereof that cost is low.
Purpose of the present invention can reach by following measure:
A kind of dispersion resistant additive of underwater concrete of the present invention is made up of cellulose ethers, it is characterized in that containing silicon magnesium stone fiber, propanediol polyoxypropylene Soxylat A 25-7, calcium sulphoaluminate, sodium aluminate.The proportioning of constituent is among the present invention:
100 parts of ether of cellulose (weight part, below all with)
Silicon magnesium stone fiber 10-300 part
Propanediol polyoxypropylene Soxylat A 25-7 10-50 part
Calcium sulphoaluminate 10-300 part
Sodium aluminate 30-150 part
The optimal proportion of constituent is among the present invention:
100 parts of methylcellulose gum
100 parts of sepiolite fibres
20 parts of propanediol polyoxypropylene Soxylat A 25-7s
200 parts of calcium sulphoaluminates
60 parts of sodium aluminates
Calcium sulphoaluminate in the present invention can replace with the magnesium oxide of equivalent.Can add hydroxypropylmethyl starch in the present invention.The ether of cellulose that uses in the present invention adopts the starting material polymerization degree to be 800-1800, etherificate time 4-10h.The silicon magnesium stone fiber that uses in the present invention is the sepiolite fibre of diameter 0.1-0.5mm, length 0.5-10mm.
Purpose of the present invention can also reach by following measure:
A kind of manufacture method that contains the dispersion resistant additive of underwater concrete of ether of cellulose, silicon magnesium stone fiber, propanediol polyoxypropylene Soxylat A 25-7, calcium sulphoaluminate, sodium aluminate of the present invention, it is characterized in that humite is smashed and chosen diameter 0.1-0.5mm through screening, length 0.5-10mm silicon magnesium stone fiber through hammer crusher under drying regime; In addition, spray into the propanediol polyoxypropylene Soxylat A 25-7 in advance in ether of cellulose, ether of cellulose, silicon magnesium stone fiber and calcium sulphoaluminate, the sodium aluminate that will be sprayed with the propanediol polyoxypropylene Soxylat A 25-7 are then together puddled and are formed.
Describe the present invention below in detail.The ether of cellulose of Shi Yonging has methylcellulose gum in the present invention, also can use ethyl cellulose, Natvosol, Vltra tears etc.This ether of cellulose can adopt cellulosic material through alkaline solution dipping, squeezing, experienced, add etherifying agent carry out etherificate, again through washing, pulverize and form.The raw-material polymerization degree of ether of cellulose is 800-1800, etherificate time 4-10h.
The silicon magnesium stone fiber that adopts among the present invention is to be smashed through hammer crusher by exsiccant sepiolite or polygorskite etc., chooses the silicon magnesium stone fiber of diameter 0.1-0.5mm, length 0.5-10mm through screening.Be preferably the employing sepiolite fibre.Destroy the fibrous texture of humite in the past with wet milling process, and also need increase moistening in addition and drying process, cost is increased, can adopt the humite processing of seasoning state among the present invention.Its consumption is 100 weight parts by ether of cellulose, is 10-300 part.Thickening effectiveness is bad when being less than 10 parts, makes the concrete mix mix bad as greater than 300 parts the time.
The propanediol polyoxypropylene Soxylat A 25-7 that uses among the present invention adds as defoamer.At first this defoamer is sprayed on the ether of cellulose in advance, its consumption of this way is few, effective, easy construction in addition.Be defoamer to be mixed in the mixing water add in the prior art, dispersion resistant additive of underwater concrete of the present invention is that various components are puddled together, when constructing at the construction field (site), directly and the cement in the concrete mix, sand, stone, water etc. together mix get final product.This defoamer consumption is 10-50 part by ether of cellulose 100 weight parts, as defoaming effect is not obvious when being lower than 10 parts, as greater than 50 parts the time, and waste material, cost height.The calcium sulphoaluminate of Shi Yonging in the present invention, make underwater concrete produce microdilatancy, produce better filling properties, consumption is that 100 weight parts are counted 10-300 part by ether of cellulose, as expansion effect is not obvious when being less than 10 parts, might produce detrimentally affect to concrete stability as greater than 300 parts the time.
The sodium aluminate that uses among the present invention adds as the concrete adjustable solidification agent, and volume is that 100 parts of weight are counted 30-150 part by ether of cellulose.Condense when faster as the needs underwater concrete, consumption is desirable big.When consumption is less than 30 parts, to concrete rapid hardening DeGrain.The hydroxypropylmethyl starch of Shi Yonging is given the underwater concrete mixture thickening property in the present invention.Consumption is counted 10-100 part by ether of cellulose 100 weight parts.Consumption is less than 10 parts, and thickening effectiveness is not remarkable, and consumption makes too thickness of concrete during greater than 100 parts.
The manufacture method of the dispersion resistant additive of underwater concrete that contains ether of cellulose, silicon magnesium stone fiber, propanediol polyoxypropylene Soxylat A 25-7, calcium sulphoaluminate, sodium aluminate of the present invention is as follows:
At first in mixer, add ether of cellulose, spray into the propanediol polyoxypropylene Soxylat A 25-7 again, stir a little, add silicon magnesium stone fiber again, this silicon magnesium stone fiber is to be broken into elongated fibers is chosen diameter 0.1-0.5mm, length 0.5-10mm again through screening silicon magnesium stone fiber by the exsiccant humite through the hammer crusher of high speed rotating, and then add calcium sulphoaluminate, sodium aluminate, also can add hydroxypropylmethyl starch together mix form.Under water during concrete construction, dispersion resistant additive of underwater concrete of the present invention by cement 100 weight parts, is added 0.1-3 part then, with cement, sand, stone, water together mix pour into a mould.
Further specify the present invention below in conjunction with embodiment.
Embodiment 1
At first methylcellulose gum is packed in the mixer, spray into the propanediol polyoxypropylene Soxylat A 25-7, add sepiolite fibre again, this sepiolite fibre is to be broken into elongated fibers by sepiolite through the hammer crusher of high speed rotating, select diameter 0.1-0.5mm through screening again, the sepiolite fibre of length 0.5-10mm adds calcium sulphoaluminate again, adds optionally that sodium aluminate together mixes again.Proportioning is:
100 parts of methylcellulose gum (Shanxi county chemical industry one factory product) (weight meter, below all with)
20 parts of propanediol polyoxypropylene Soxylat A 25-7s (auxiliary reagent factory, Tianjin product)
100 parts of sepiolite fibres (Henan Xixia Mine product)
200 parts of calcium sulphoaluminates (cement mill, county, Wuqing, Tianjin product)
60 parts of sodium aluminates (commercial)
Just make an example of a kind of dispersion resistant additive of underwater concrete of the present invention after puddling above-mentioned each component evenly, it is mixed 2% by cement 100 weight parts, the sand-cement slurry weight ratio is in addition:
Cement: sand: water=1: 2.5: 0.55
Above-mentioned each component is joined mix 6min in the GB177-77 type cement plaster blender, this sand-cement slurry that mixes is measured following each performance:
1, strength trial
In the tank of depth of water 300mm, place the sand-cement slurry die trial of 40 * 40 * 160mm, and in die trial, vertically place the wire netting (10 * 10mm square hole) of 180 * a 180 * 250mm.The above-mentioned sand-cement slurry that mixes is poured into die trial in the water by the water surface from wire netting, free drop is 300mm when keeping pouring into, and scrapes off unnecessary mortar on the model, the back form removal of waiting to harden, and maintenance is to regulated period age, the ultimate compression strength of mensuration mortar.
2, slump test
Press the GB2419-81 regulation and measure its degree of mobilization.
3, pH value transmittance test
Put into 800 ml waters in 1000 milliliters glass beaker, the sand-cement slurry that 500 grams are mixed is divided into 10 parts, drops in 10-20s, and static 3min pours out 600 milliliters of mixed solutions then from beaker, measure its pH value and transmittance.Every test-results is listed in table 1.
Embodiment 2
It is all identical to add the hydroxypropylmethyl starch (chemical plant, Huian, Shaanxi product) other in the dispersion resistant additive of underwater concrete in embodiment 1 again.
Comparative example 1
Adopt in the dispersion resistant additive of underwater concrete in embodiment 1 etc. (by siccative) water levigated sepiolite powder of weight replaces, other is all identical.
Comparative example 2
In the dispersion resistant additive of underwater concrete in embodiment 1, the propanediol polyoxypropylene Soxylat A 25-7 changed into be added to the water, other is all identical.
Comparative example 3
All identical except that in embodiment 1, in sand-cement slurry, not adding the dispersion resistant additive of underwater concrete of the present invention other.
Above-mentioned employing sand-cement slurry test, as make concrete test into, promptly in sand-cement slurry, adding stone aggregate again, its test comparing result is similar.
Compared with the prior art the present invention has the following advantages:
1, adopts dispersion resistant additive of underwater concrete of the present invention to be incorporated into it is not disperseed in water, obtain higher early stage and later strength.
2, easy construction, additive is puddled in advance, once adds when construction.
3, cost is low. Because adopting silicon magnesium stone fiber or hydroxypropyl methyl starch can greatly reduce the consumption of cellulose ether.
4, can make underwater concrete produce microdilatancy, have good filling capacity.
5, regulate the consumption of sodium aluminate, can make the setting time of underwater concrete adjusted.
Claims (8)
1, a kind of dispersion resistant additive of underwater concrete is made up of cellulose ethers, it is characterized in that containing silicon magnesium stone fiber, propanediol polyoxypropylene Soxylat A 25-7, calcium sulphoaluminate, sodium aluminate.
2, a kind of dispersion resistant additive of underwater concrete as claimed in claim 1 is characterized in that containing:
100 parts of ether of cellulose (weight part, as follows)
Silicon magnesium stone fiber 10-300 part
Propanediol polyoxypropylene Soxylat A 25-7 10-50 part
Calcium sulphoaluminate 10-300 part
Sodium aluminate 30-150 part
3, a kind of dispersion resistant additive of underwater concrete as claimed in claim 1 or 2 is characterized in that optimal proportion is:
100 parts of methylcellulose gum
100 parts of sepiolite fibres
20 parts of propanediol polyoxypropylene Soxylat A 25-7s
200 parts of calcium sulphoaluminates
60 parts of sodium aluminates
4, a kind of dispersion resistant additive of underwater concrete as claimed in claim 1 or 2 is characterized in that the magnesium oxide replacement calcium sulphoaluminate wherein with equivalent.
5, a kind of as claim 1,2 described dispersion resistant additive of underwater concrete, it is characterized in that containing hydroxypropylmethyl starch.
6, a kind of dispersion resistant additive of underwater concrete as claimed in claim 1 or 2 is characterized in that the cellulosic raw material polymerization degree wherein is 800-1800, and the wherein cellulosic etherificate time is at 4-10h.
7, a kind of dispersion resistant additive of underwater concrete as claimed in claim 1 or 2 is characterized in that wherein silicon magnesium stone fiber is selected diameter 0.1-0.5mm for use, the sepiolite fibre of long 0.5-10mm.
8, a kind of manufacture method that contains the dispersion resistant additive of underwater concrete of ether of cellulose, silicon magnesium stone fiber, propanediol polyoxypropylene Soxylat A 25-7, calcium sulphoaluminate, sodium aluminate, it is characterized in that humite is smashed through hammer crusher under drying regime, choose the silicon magnesium stone fiber of diameter 0.1-0.5mm, length 0.5-10mm through screening; Spray into the propanediol polyoxypropylene Soxylat A 25-7 in addition in advance in ether of cellulose, ether of cellulose, silicon magnesium stone fiber and calcium sulphoaluminate, the sodium aluminate that will be sprayed with the propanediol polyoxypropylene Soxylat A 25-7 are then together puddled and are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111809 CN1027501C (en) | 1991-12-27 | 1991-12-27 | Dispersion resistant additive of underwater concrete and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111809 CN1027501C (en) | 1991-12-27 | 1991-12-27 | Dispersion resistant additive of underwater concrete and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1073669A true CN1073669A (en) | 1993-06-30 |
| CN1027501C CN1027501C (en) | 1995-01-25 |
Family
ID=4910871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111809 Expired - Fee Related CN1027501C (en) | 1991-12-27 | 1991-12-27 | Dispersion resistant additive of underwater concrete and its preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1027501C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045368A (en) * | 2016-05-30 | 2016-10-26 | 江苏名和集团有限公司 | Admixture special for underwater concrete |
| CN106116225A (en) * | 2016-06-24 | 2016-11-16 | 桂林华越环保科技有限公司 | A kind of concrete water-retaining agent |
| CN107382220A (en) * | 2017-09-06 | 2017-11-24 | 陈毅忠 | A kind of frost-resistant concrete |
-
1991
- 1991-12-27 CN CN 91111809 patent/CN1027501C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045368A (en) * | 2016-05-30 | 2016-10-26 | 江苏名和集团有限公司 | Admixture special for underwater concrete |
| CN106116225A (en) * | 2016-06-24 | 2016-11-16 | 桂林华越环保科技有限公司 | A kind of concrete water-retaining agent |
| CN107382220A (en) * | 2017-09-06 | 2017-11-24 | 陈毅忠 | A kind of frost-resistant concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1027501C (en) | 1995-01-25 |
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