CN1027501C - Dispersion resistant additive of underwater concrete and its preparation method - Google Patents
Dispersion resistant additive of underwater concrete and its preparation method Download PDFInfo
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- CN1027501C CN1027501C CN 91111809 CN91111809A CN1027501C CN 1027501 C CN1027501 C CN 1027501C CN 91111809 CN91111809 CN 91111809 CN 91111809 A CN91111809 A CN 91111809A CN 1027501 C CN1027501 C CN 1027501C
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- underwater concrete
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- resistant additive
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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 present invention provides a dispersion resistance additive of underwater concrete and a preparing method thereof. The dispersion resistance additive comprises cellulose ether, humite fiber, propylene glycol polyoxypropylene polyoxyethylene ether defoaming agent, calcium sulfoaluminate, sodium aluminate, etc. The preparing method adopts a preparing method by the hammer type pulverization of a humite fiber and the treating methods, such as firstly spraying cellulose ether with a defoaming agent, etc. The dispersion resistance additive of underwater concrete has the advantages of low raw material cost, simple and convenient processing, strong dispersion-resisting capacity, etc., and thus, the dispersion resistance additive can be used for the underwater concrete pouring construction.
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 methylcellulose gum.
In the past, when carrying out 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 polyacrylamide dispersion resistant additive of underwater concrete that contains, its objective is the anti-dispersiveness that adopts sepiolite powder to increase underwater concrete, its weak point is to adopt wet milling process to grind sepiolite can not obtain long thin shape sepiolite fibre, 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 methylcellulose gum, 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 methylcellulose gum, disclose the dispersion resistant additive of underwater concrete that a kind of methylcellulose gum and acrylamide are formed as Japanese publication JP63-206344, its objective is that overcoming methylcellulose gum 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 characterized in that containing:
100 parts of methylcellulose gum
10～300 parts of sepiolite fibres
10～50 parts of propanediol polyoxypropylene Soxylat A 25-7s
10～300 parts of calcium sulphoaluminates
30～150 parts of sodium aluminates
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 methylcellulose gum employing starting material polymerization degree of using in the present invention is 800～1800, etherificate time 4～10h.The sepiolite fibre 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:
The manufacture method of a kind of dispersion resistant additive of underwater concrete of the present invention, it is characterized in that be sprayed with the propanediol polyoxypropylene Soxylat A 25-7 methylcellulose gum and with sepiolite under drying regime through hammer crusher smash, through screening choose the sepiolite fibre of diameter 0.1～0.5mm, length 0.5～10mm and calcium sulphoaluminate, sodium aluminate is together puddled and is formed.
Describe the present invention below in detail.The methylcellulose gum of Shi Yonging also can use ethyl cellulose, hydroxyethylmethyl-cellulose, hydroxypropylcellulose etc. in the present invention.This methylcellulose gum can adopt the methylcellulose gum raw 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 methylcellulose gum is 800～1800, etherificate time 4～10h.
The sepiolite fibre that adopts among the present invention is a sepiolite fibre of being smashed, choose through screening diameter 0.1～0.5mm, length 0.5～10mm by the exsiccant sepiolite through hammer crusher.Destroy the fibrous texture of sepiolite in the past with wet milling process, and also need increase moistening in addition and drying process increases cost, can adopt the sepiolite processing of seasoning shape among the present invention.Its consumption is that 100 weight parts are counted 10～300 parts by methylcellulose gum.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 into earlier on the methylcellulose gum, its consumption of this way is few, and is effective, in addition easy construction.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 counted 10～50 parts by methylcellulose gum 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 that microdilatancy be arranged, produce better filling properties, consumption is that 100 weight parts are counted 10～300 parts by methylcellulose gum, 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 weight parts are counted 30～150 parts by methylcellulose gum, condenses when faster as the needs underwater concrete, with measuring greatly.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 parts by methylcellulose gum 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 methylcellulose gum, sepiolite fibre, propanediol polyoxypropylene Soxylat A 25-7, calcium sulphoaluminate, sodium aluminate of the present invention is as follows:
At first in mixer, add methylcellulose gum, spray into the propanediol polyoxypropylene Soxylat A 25-7 again, stir a little, add sepiolite fibre again, this sepiolite fibre is to be broken into elongated fibers by the exsiccant sepiolite through the hammer crusher of high speed rotating to choose diameter 0.1～0.5mm, length 0.5～10mm sepiolite fibre through screening again, add then 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, to select the sepiolite fibre of diameter 0.1～0.5mm, length 0.5～10mm through screening again through the hammer crusher of high speed rotating by sepiolite, adds calcium sulphoaluminate again, sodium aluminate together mixes.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 (Tianjin rib agent factory 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 was joined the interior mix of GB177-77 type cement plaster blender 6 minutes, 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 cylinder, the sand-cement slurry that 500 grams are mixed is divided into 10 parts, in 10～20 seconds, drop into, and static 3 minutes, from cup, pour out 600 milliliters of mixed solutions then, measure its pH value and transmittance.Each item is tested and be the results are shown 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
It is all identical not add the dispersion resistant additive of underwater concrete of the present invention other in the cement mortar in embodiment 1.
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, can greatly reduce the consumption of methylcellulose because adopting sepiolite fibre or hydroxypropyl methyl starch.
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.
Table 1
Group EXAMPLE Example comparative example comparative example comparative example
Performance measurement 12123
Compression strength (MPa) 24.6 25.6 20.3 24.0 10.8
/ / / / /
（R28/R7） 13.4 14.4 10.3 13.0 6.5
PH value 8.4 8.4 8.8 8.8 12.7
Light transmittance (%) 93.7 93.8 83.6 83.6 39.5
Fluidity (mm) 179 178 180 180 223
The non-foaming foaming of foaming phenomenon
Claims (5)
1, a kind of dispersion resistant additive of underwater concrete is characterized in that containing:
100 parts of methylcellulose gum (weight part, as follows)
10～300 parts of sepiolite fibres
10～50 parts of propanediol polyoxypropylene Soxylat A 25-7s
10～300 parts of calcium sulphoaluminates
30～150 parts of sodium aluminates
2, a kind of dispersion resistant additive of underwater concrete as claimed in claim 1 is characterized in that optimal proportion is:
100 parts of methylcellulose gum (weight part, as follows)
100 parts of sepiolite fibres
20 parts of propanediol polyoxypropylene Soxylat A 25-7s
200 parts of calcium sulphoaluminates
60 parts of sodium aluminates
3, 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.
4, a kind of dispersion resistant additive of underwater concrete as claimed in claim 1 or 2 is characterized in that containing hydroxypropylmethyl starch, and volume is counted 10～100 weight parts by methylcellulose gum 100 weight parts.
5, a kind of manufacture method of dispersion resistant additive of underwater concrete as claimed in claim 1 is characterized in that comprising the following steps:
100 weight part methylcellulose gum are sprayed 10～50 weight part propanediol polyoxypropylene Soxylat A 25-7s; Sepiolite is smashed, chosen the 100 weight part methylcellulose gum of 10～300 weight part propanediol polyoxypropylene Soxylat A 25-7s of diameter 0.1～0.5mm, length 0.5～10mm and 10～300 weight part sepiolite fibres and 10～300 weight part calcium sulphoaluminates and 30～150 weight part sodium aluminates through screening again and puddled and form through hammer crusher under drying regime.
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 CN1073669A (en) | 1993-06-30 |
| CN1027501C true 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) |
Families Citing this family (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
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| Publication number | Publication date |
|---|---|
| CN1073669A (en) | 1993-06-30 |
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