Preparation method of concrete coagulant

A coagulation accelerator and concrete technology, applied in the field of cement admixtures, can solve problems such as poor setting speed and strength, and achieve the effects of improving the coagulation acceleration effect, reducing the final setting time, and accelerating the hydration process

Inactive Publication Date: 2018-06-15
蒋春霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: Aiming at the problems of poor setting speed and strength of traditional concrete accelerators, a preparation method of concrete accelerators is provided

Method used

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  • Preparation method of concrete coagulant

Examples

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example 1

[0021] Mix sepiolite and water in a beaker at a mass ratio of 1:5, and add nano-silica of 0.3 times the mass of sepiolite to the beaker, move the beaker into an ultrasonic oscillator, and vibrate ultrasonically at a frequency of 65kHz After 30 minutes, filter to obtain pretreated sepiolite; mix the pretreated sepiolite and saturated calcium chloride solution in a flask at a mass ratio of 1:6, lower the temperature in the flask to 25°C, and then add Pretreat dopamine with 0.5 times the mass of sepiolite, adjust the pH of the system in the flask to 8.8 with a sodium hydroxide solution with a mass fraction of 8%, soak for 70 minutes at a temperature of 25°C, and filter to obtain a filter cake. The cake was moved into a drying oven, and dried at a constant temperature for 30 minutes at a temperature of 50°C to obtain modified sepiolite; polyacrylamide and polyallylamine were mixed at a mass ratio of 3:1, and mixed with polyacrylamide and polyolefin Add absolute ethanol 0.3 times t...

example 2

[0023]Mix polyacrylamide and polyallylamine at a mass ratio of 3:1, and add absolute ethanol 0.3 times the mass of polyacrylamide to the mixture of polyacrylamide and polyallylamine, at a temperature of 15°C and a speed of 450r / After stirring and mixing for 12 minutes under the condition of 1 min, the mixed solution was obtained; the paraffin and waste paper pulp were mixed in the reactor at a mass ratio of 4:1, and sodium bicarbonate with 0.4 times the mass of paraffin and sodium bicarbonate with 0.2 times the mass of paraffin were added to the reactor. Dispersant, after stirring and mixing for 30 minutes at a temperature of 55°C and a rotational speed of 320r / min, freeze and pulverize the materials in the reaction kettle, and pass through a 180-mesh sieve to obtain additives; weigh 6 parts in sequence according to parts by weight Sodium metaaluminate, 5 parts of calcium oxide, 20 parts of mixed solution, 12 parts of additives, 0.8 times of emulsifier and 0.3 times of dispers...

example 3

[0025] Mix sepiolite and water in a beaker at a mass ratio of 1:5, and add nano-silica of 0.3 times the mass of sepiolite to the beaker, move the beaker into an ultrasonic oscillator, and vibrate ultrasonically at a frequency of 65kHz After 30 minutes, filter to obtain pretreated sepiolite; mix the pretreated sepiolite and saturated calcium chloride solution in a flask at a mass ratio of 1:6, lower the temperature in the flask to 25°C, and then add Pretreat dopamine with 0.5 times the mass of sepiolite, adjust the pH of the system in the flask to 8.8 with a sodium hydroxide solution with a mass fraction of 8%, soak for 70 minutes at a temperature of 25°C, and filter to obtain a filter cake. Move the cake into a drying oven, and dry at a constant temperature for 30 minutes at a temperature of 50°C to obtain modified sepiolite; add anhydrous ethanol with 0.1 times the mass of polyallylamine to the polyallylamine, at a temperature of 15°C, rotate After stirring and mixing for 12 ...

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Abstract

The invention discloses a preparation method of a concrete coagulant, and belongs to the technical field of cement admixtures. The preparation method comprises the following steps: sequentially weighing the following components in parts by weight: 4-6 parts of sodium metaaluminate, 3-5 parts of calcium oxide, 8-10 parts of modified sepiolite, 15-20 parts of a mixed liquid, 10-12 parts of an addition material, 0.4-0.8 parts of an emulsifier and 0.2-0.3 part of a dispersant, firstly mixing the sodium metaaluminate, the calcium oxide and the modified sepiolite in a stirrer, carrying out stirringand mixing for 10-20min at a temperature of 20-35 DEG C and a rotating speed of 300-380 r / min to obtain a mixed blank, then mixing the mixed blank with the mixed liquid in a mixer, adding the additionmaterial, the emulsifier and the dispersant into the mixer, and carrying out stirring and mixing for 4-8min at a rotating speed of 400-600 r / min, so as to obtain the concrete coagulant. The concretecoagulant obtained by the preparation method provided by the invention has excellent condensation speed and strength.

Description

technical field [0001] The invention discloses a preparation method of a concrete coagulant and belongs to the technical field of cement admixtures. Background technique [0002] Accelerator is a set-adjusting agent that can speed up the setting and hardening of cement or concrete. Since production and use began in the 1930s, accelerators have become one of the important components of shotcrete due to their remarkable characteristics in quick setting and early strength. It is widely used in underground caverns, underground powerhouses, slope support, traffic tunnels and some emergency repair projects of water conservancy projects. Especially with the increase in the number and scale of underground projects and their different functions, the accelerator is not only very important as a component of concrete, but also indispensable in some specific projects. It is widely used in water conservancy, transportation, mining, etc. and some repair works. There are many kinds of ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C04B24/32C04B103/12
CPCC04B40/0046C04B2103/12C04B22/0093C04B22/064C04B14/042C04B24/2652C04B24/026C04B24/36C04B18/243C04B22/10C04B24/20
Inventor 蒋春霞徐珉张淼
Owner 蒋春霞
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