A method of obtaining a plasticizer for cement concrete mix

 

(57) Abstract:

The destination area: the invention relates to the production of plasticizer used in construction in the preparation of cement mortar. The essence of the invention: a method of obtaining a plasticizing agents include sulfonation source of aromatic oil, which is used acidic tar process "Parex" with acid number in the range 700-1030 mg KOH/g, the treatment with alkali, and as alkalis are used 10-20% aqueous NaOH solution and condensation with formaldehyde at 65-75°C for 100-120 min with a ratio of acidic tar formaldehyde 1 to 0.1, then the introduction of technical lignosulfonates or one stripped off poslerostovoi bards of molasses in the ratio of 1 0,65-0,75, stirring the mixture at 75-85°C for 30-40 min, the introduction of additional formaldehyde in the ratio of acidic tar formaldehyde 1 0,03-0,05 and subsequent condensation at 80-90 °C for 60 min, the ratio of acid tar formaldehyde technical lignosulfonates or one stripped off poletayeva bard molasses is from 1 0,13 0,65 to 10.15 0,75. With the introduction of plasticizer in concrete mix increases the mobility of it 2-5 times that the EC is actually, in particular the production of complex additives used for the preparation of cement mortar.

A method of obtaining supplements by sulfonation of anthracene at 80-120aboutC for 2-3 h, followed by condensation with formaldehyde at 85-95aboutWith time and a 2.5-3 hour Partial neutralization of the resulting product is spend 42% aqueous NaOH solution to pH 2-3. Then the product is condensed with lignosulfonate in 80-95aboutC for 15-20 min after which the reaction mass is neutralized with the same aqueous solution of NaOH to pH 8-9. To the neutralized product add formalin and 80-85aboutThe mixture was incubated with 1.0-1.5 h [1]

The closest technical solution to the claimed is a method of obtaining a plasticizer for cement concrete mixture comprising sulfonation of the original aromatic products, their condensation with formaldehyde and treated with alkali [2]

The technical result from the use of the invention is to improve the mobility of the concrete mix or increasing the strength of concrete.

The technical result is achieved in that in the method of producing plasticizer comprising sulfonation source of aromatic oil, their condensation with formal the process "Parex" with acid number in the range 700-1030 mg KOH/g, but as alkali 10-20% aqueous NaOH solution, and the alkali treatment is carried out before the condensation with formaldehyde, and condensation is carried out at 65-75aboutWith over 100-120 min with a ratio of acidic tar:formaldehyde of 1:0,1, then add technical lignosulfonates or one stripped off poslerostovoi bard of molasses in the ratio of 1: 0,65:0,75, stirred the mixture at 75-85aboutC for 30-40 min and impose additional formaldehyde in the ratio of, respectively: sour tar:formaldehyde of 1:0,03-0,05, and then spend additional condensation at 80-90aboutC for 60 min, the ratio of acid tar:formaldehyde:technical lignosulfonates or one stripped off poletayeva bard molasses is respectively 1:0,13:0.65 to 1:0.15 to:0,75.

P R I m e R 1. In the device with the mixing device, load 100 g sour tar process "Parex", then the mass is neutralized 10% aqueous NaOH solution to pH 11. To the neutralized mass add 30 g of formalin (35% aqueous solution of formaldehyde) (ratio of acid tar:formaldehyde of 1:0,1). The mixture is stirred for 100 min at a temperature of 75aboutC. Further to add weight 186 g of a 35% aqueous solution of lignosulfonate 85aboutWith and additionally injected formalin in the amount of 9 g aged under stirring for 60 minutes at a temperature of 90about(The ratio of acid tar:formaldehyde of 1:0,03). The ratio of reactants are shown in table. 1. The obtained additive cooled to a temperature of 20-30aboutC.

P R I m m e R 2. In the device with the mixing device, load 100 g of acid tar, stand under stirring for 2 hours at a temperature of 80aboutC. Next, the mass is neutralized 20% aqueous NaOH solution to pH 12. To the neutralized mass add 30 g of formalin (35% aqueous solution of formaldehyde) (ratio of acid tar:formaldehyde of 1:0,1). The mixture is stirred for 120 minutes at a temperature of 65aboutC. Further to add weight 214 g of 35% aqueous solution of lsls (ratio of acid tar:lsls 1:0,75). The mixture is stirred for 40 minutes at a temperature of 75aboutAnd further added 14.3 g of formalin aged with stirring for 80 minutes at 80about(The ratio of acid tar: formaldehyde of 1:0,05). The ratio of reactants are shown in table. 1.

P R I m e R 3. Conditions of implementation of additive synthesis analogous to example 2, but at lsls use one stripped off poslerostovoi the measure 1, but add 157 g of a 35% aqueous solution of lsls (ratio of acid tar lsls 1:0,55).

P R I m e R 5. Conditions of implementation of additive synthesis analogous to example 2, but add 243 g of an aqueous solution lsls (ratio of acid tar:LST equals 1:0,85).

P R I m e R 6. Conditions of implementation of additive synthesis analogous to example 1, but add 20 g of formalin on the 1st stage of condensation, the concentration of formaldehyde 35% (the ratio of acid tar:formaldehyde of 1:0,07). The increase in the number of input formaldehyde more than in example 2 leads to the formation of solid polymer particles insoluble in water. Thus obtained additive, having a density of 1.14-1,16 g/cm3and contains 18-22% of the active part is introduced into the cement compositions in an amount of 0.1 to 0.6% by weight of cement (PL.2). The concrete mix was prepared from lantsetolistnogo cement, sand with fineness modulus 2,02, gravel FR. 3-10 mm with a ratio of cement:sand:gravel 1:3,07:3,78. The strength of concrete was determined on samples of sizes HH sm GOST 10180-74. The results are presented in table. 2.

A method of OBTAINING a PLASTICIZER FOR CEMENT concrete MIXTURE comprising sulfonation source of aromatic oil, their condensation with reportout acidic tar process "Parex" with acid number in the range 700 1030 mg KOH/g, but as alkali 10 20% aqueous NaOH solution, and the alkali treatment is carried out before the condensation with formaldehyde, and condensation is carried out at 65 75oWith over 100 120 min at a ratio of acidic tar formaldehyde 1,0 0,1, then add technical lignosulfonates or one stripped off poslerostovoi bard of molasses in the ratio of, respectively, 1 0,65 0,75, stirred the mixture at 75 85oC for 30 to 40 minutes, and further added formaldehyde in the ratio of, respectively, the acid tar formaldehyde 1,0 0,03 0,05, and then spend additional condensation at 80 90oC for 60 min, the ratio of acid tar formaldehyde technical lignosulfonates or one stripped off poletayeva bard molasses is respectively 1,0 0,13 0,65 1,0 0,15 0,75.

 

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SUBSTANCE: method includes centrifugal preseparation of distillery dreg to provide concentrate, treatment obtained concentrate with alkali carbonate to pH 8-11, followed by addition of superplasticizer or lignosulfonate solution providing ratio of total amount of alkali carbonate and concentrate to amount of solution ‹1. Superplasticizer or lignosulfonate solution is added to obtained centrifuge effluent, providing ratio of centrifuge effluent to said solution from 0.2 to 2.0 to produce another plasticizer. Dry alkali carbonate content is not more than biomass content in raw distillery dreg. Method of present invention is useful in concrete mixtures manufacturing for producing of precast concrete and cast-in-place constructions.

EFFECT: concrete mixtures with controlled flow characteristic and concrete curing rate.

2 cl, 4 ex

FIELD: building materials, in particular grouting mortar, concrete mix, and dry building mix.

SUBSTANCE: claimed complex powder additive contains (mass %): superplasticizer 66.7-72.7; commercial lignosulfonates 17.4-20.0; organopolysiloxane (e.g. sodium ethylsiliconate or methylsiliconate containing 5.53-6.11 mass % of silicon and having polymerization degree of 9-12) 7.3-15.9.

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EFFECT: concrete mixture of high flow storability.

9 cl, 2 tbl

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3 cl, 4 e[, 3 tbl

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2 tbl

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