SU382592A1 - HEMIDATING HYDRATATION MIEEURAL BINDERS - Google Patents

Description

one

The invention relates to the composition of additives that regulate the process of hydration of mineral in the living.

Additives of organic origin are known that are used to slow down the hydration of the mineral} in the living.

The purpose of the invention is to increase the strength of mineral products in the field.

This is achieved by the use of mustard cake, which is a waste of mustard production, as a hydration retardant in those who eat.

The proposed additive has the following chemical composition,%: water 10; fat 8; fiber 12; nitrogenous substances 44, (of which protein 38) mineral substances 7.

Mustard seed cake is introduced into the water of the wort and is used to slow down the hydration of fast and slow lime, as well as cement mortars, the amount of mustard oil additive being determined by the appearance of the binder.

The addition of mustard oil in an amount of 1-1.5% of the weight of copper-rich lime slows down the rate of growth and reduces the temperature of the mixture. If the rate of lime absorption without additives is 45 minutes, then with additions of 1 and 1.5% mustard oil, respectively, 100-160 minutes. The temperature of the mixture with additives of the cake is 3-4 times lower than the temperature of the mixture without additives. The rate of lime slaking with the addition of 1.5% gypsum is 85 minutes, with the addition of 1.57 ° sulphite-alcohol stillage — 120 minutes.

Strength of silicate products with additive

gharchnichny two times higher than with the addition of sulfite} 10-sprint bards.

The addition of mustard oil to 1-1.5% of the weight of quick-burning lime slows down the rate of quick-damping.

lime and lowers the temperature of the mixture. The rate of slaking quick-drying lime without additives is 10 minutes, with additions of mustard oil 1 and 1.5%, respectively 40 and 70 minutes. The temperature of the mixture with additives of the cake is 3-4 times lower than the temperature of the mixture without additives.

The strength of silicate products from quick-burning lime with the addition of mustard

The cake is 2 times higher than with the addition of PRS. Cement mortars with the addition of mustard oil are prepared as follows: mustard oil in an amount of 0.3-0.5% by weight of cement is added to the mixing water, stirred for 1-2 minutes, and then the cement slurry is prepared on the resulting slurry.

 At 22 ° C, the addition of mustard oil in the amount of 0.5% lengthens the end of setting of Portland cement with a Cs5 content of 58% and

SzA 6% per b hour, with - for 3.5 hours.

The advantages of mustard meal over other moderators are that it has a stronger inhibitory effect on the setting and hardening of the cement slurry and contributes to an increase in the strength of the products. At -95 ° C, the addition of starch, sulfosalicylic acid and carboxymethylcellulose in an amount of 0.5% lengthens the end of the setting of the cement, respectively, for 30 minutes, 1.5 hours and 2.5 hours, and the addition of mustard oil by 3.5 hours . The plastic strength of the cement paste of normal thickness after 8 hours after preparation is 9 kg / cm, with the addition of 0.5% starch or carboxymethylcellulose, respectively 5 KZJCM- and 1.6 kg / cm, with the addition of 0.5% mustard / kmykh - 0, 4 kg / cm.

The strength of cement samples with the addition of 0.5% mustard oil cake is higher than with the addition of other retarders.

The table shows the values of the compressive strength of the samples (3X3X3) of cement-sand mortar (sand sand: water 4: 2: 1) after 28 days of hardening. Samples made without additives have

ultimate compressive strength after 28 pieces of hardening 180 kg / cm.

Subject invention

It is used as a retardant for the hydration of mineral in the eaten supplements of mustard cake.