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Long-acting slump prevention agent and preparation method thereof

A slump retaining agent and long-acting technology, which is applied in the field of long-acting slump retaining agent and its preparation, can solve the problems of inconvenient long-distance and long-term transportation, the inability to pour out concrete, and reduce the capacity of tank trucks, etc., to achieve high strength, low bleeding, and The effect of reducing the chance of impurity formation

Inactive Publication Date: 2018-06-29
宜宾市杰特曼建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The slump-preserving agents currently on the market have poor slump-preserving effects, and the slump-preserving time is generally 1-1.5 hours. After this time, the concrete will start to solidify, which is not convenient for long-distance and long-term transportation. Once the concrete solidifies during transportation, it will Attached to the inside of the cement tanker, the capacity of the tanker will be reduced, the concrete cannot be poured out, and the entire concrete tank will be scrapped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Add 1350 kg of water into the 5000L reactor, then add 1700 kg of imported ether and start stirring to dissolve the ether. During the dissolution process, the temperature of the reactor is raised to 58°C±2°C, and nitrogen gas is introduced after the temperature stabilizes (to produce polycondensation Reaction makes reaction more fully) after slowly adding 17 kilograms of B2 powder (sodium methacryl sulfonate) and continuing to stir for 5 minutes, then slowly adding 6.8 kilograms of ammonium peroxide, the reaction kettle is always in stirring state in the whole reaction process.

[0026] 2. Prepare materials A and B,

[0027] Material A is prepared by stirring 2.9 kg of imported AC (thioglycolic acid) and 300 kg of water.

[0028] Material B is prepared by stirring 222 kg of A2 liquid (strong ethyl ester), 80 kg of acrylic acid and 120 kg of water.

[0029] In order to ensure the reaction effect, both material A and material B are prepared 15 minutes before the dropwi...

Embodiment 2

[0035] 1. Add 1350 kg of water into the 5000L reactor, then add 1785 kg of imported ether and start stirring to dissolve the ether. During the dissolution process, the temperature of the reactor is raised to 58°C±2°C, and nitrogen gas is introduced after the temperature is stable (to produce polycondensation Reaction makes reaction more fully) after slowly adding 17 kilograms of B2 powder (sodium methacrylic sulfonate) and continue to stir for 5 minutes, then slowly add 6.5 kilograms of ammonium peroxide, and the reaction kettle is always in stirring state in the whole reaction process.

[0036] 2. Prepare materials A and B,

[0037] Material A is prepared by stirring 2.5 kg of imported AC (thioglycolic acid) and 300 kg of water.

[0038] Material B is prepared by stirring 210 kg of A2 liquid (strong ethyl ester), 80 kg of acrylic acid and 120 kg of water.

[0039] In order to ensure the reaction effect, both material A and material B are prepared 15 minutes before the dropwi...

Embodiment 3

[0045] 1. Add 1350 kg of water into the 5000L reactor, then add 1700 kg of imported ether and start stirring to dissolve the ether. During the dissolution process, the temperature of the reactor is raised to 58°C±2°C, and nitrogen gas is introduced after the temperature stabilizes (to produce polycondensation Reaction makes reaction more fully) after slowly adding 17 kilograms of B2 powder (sodium methacryl sulfonate) and continuing to stir for 5 minutes, then slowly adding 7 kilograms of ammonium peroxide, the reaction kettle is always in stirring state in the whole reaction process.

[0046] 2. Prepare materials A and B,

[0047] Material A is prepared by stirring 2.9 kg of imported AC (thioglycolic acid) and 300 kg of water.

[0048] Material B is prepared by stirring 222 kg of A2 liquid (strong ethyl ester), 80 kg of acrylic acid and 120 kg of water.

[0049] In order to ensure the reaction effect, both material A and material B are prepared 15 minutes before the dropwise...

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Abstract

The invention provides a preparation method of a long-acting slump prevention agent. The preparation method is characterized by comprising the following steps: adding water and diethyl ether into a reaction kettle, heating and stirring the water and the diethyl ether to dissolve the diethyl ether, feeding nitrogen, then adding sodium methallyl sulfonate and ammonium persulfate in sequence, and stirring the components; dropwise adding a material A and a material B; after the dropwise adding is completed, cooling the mixture to 50+ / -20 DEG C, adding 30 percent of liquid alkali for neutralization, controlling a PH value between 6 and 7, continuously stirring the components for 15 minutes, then supplementing water, and shutting off nitrogen discharging. The slump prevention agent obtained by adopting the method is added into concrete, so that the slump prevention time is prolonged, and the intensity of the concrete is effectively enhanced.

Description

technical field [0001] The invention relates to a long-acting slump-retaining agent and a preparation method thereof. Background technique [0002] The slump-retaining agent is an admixture that can keep the slump of concrete from losing rapidly. The slump-retaining agent is essentially a setting retarder, which delays the hydration and setting of cement to maintain the slump. [0003] The slump-preserving agents currently on the market have poor slump-preserving effects, and the slump-preserving time is generally 1-1.5 hours. After this time, the concrete will start to solidify, which is not convenient for long-distance and long-term transportation. Once the concrete solidifies during transportation, it will Attached to the inside of the cement tanker, the capacity of the tanker will be reduced, the concrete cannot be poured out, and the entire concrete tank will be scrapped. Contents of the invention [0004] The first object of the present invention is to provide a pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F228/02C04B24/16C04B103/30
CPCC04B24/163C04B2103/308C08F220/06C08F228/02
Inventor 陈国杰
Owner 宜宾市杰特曼建材有限公司
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