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Preparation method of anti-cracking agent for concrete

An anti-crack agent and concrete technology, applied in the field of concrete, can solve problems such as unfavorable crack resistance, and achieve the effect of accelerating drying speed, increasing water resistance and improving filling.

Inactive Publication Date: 2018-06-19
张芸
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the current concrete anti-cracking agent has strong water absorption, which is unfavorable for cracking resistance, and at the same time, the anti-cracking agent must be added with water reducing agent to offset the water absorption effect and the influence of water consumption, to provide a concrete anti-cracking agent The preparation method of the agent

Method used

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  • Preparation method of anti-cracking agent for concrete

Examples

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preparation example Construction

[0020] Preparation of additives: According to the mass ratio of 0.4~1.3:1:2, mix sodium dodecylbenzenesulfonate, cetyltrimethylammonium bromide and 300 mesh vermiculite particles evenly to obtain additives.

[0021] Anionic polyacrylamide was purchased from Henan Secco Environmental Technology Co., Ltd.

[0022] A preparation method of concrete anti-cracking agent, the preparation method comprises the steps of:

[0023] (1) Take kyanite and calcium carbide slag at a mass ratio of 1:2~4, put them into a pulverizer and pulverize them at 800r / min for 50min, collect the pulverized materials, and put them into a calciner for calcination. First, raise the temperature to 1000~1100 ℃, calcined for 30~40min, raised the temperature to 1250~1350℃, calcined for 1~2h, then raised the temperature to 1480~1500℃, calcined for 2~3h, collected the calcined product, and mixed the calcined product, additive and ethanol solution in a mass ratio of 6~9 :1:3, put into the ball mill and grind for 2h...

example 1

[0028] Preparation of additives: Mix cetyltrimethylammonium bromide and methyltriethoxysilane at a mass ratio of 1:1.

[0029] Catalyst selection: platinum catalyst (Shaanxi Ruike New Material Co., Ltd.: platinum alumina catalyst).

[0030] Preparation of additives: Stir sodium dodecylbenzenesulfonate, cetyltrimethylammonium bromide and 300-mesh vermiculite particles evenly at a mass ratio of 0.4:1:2 to obtain additives.

[0031] Anionic polyacrylamide was purchased from Henan Secco Environmental Technology Co., Ltd.

[0032] A preparation method of concrete anti-cracking agent, the preparation method comprises the steps of:

[0033] (1) Take kyanite and carbide slag at a mass ratio of 1:2, put them into a pulverizer and grind them at 800r / min for 50 minutes, collect the crushed materials, and put them in a calcination furnace for calcination. First, heat up to 1000°C and calcine for 30 minutes , heated to 1250°C, calcined for 1 hour, then heated to 1480°C, calcined for 2 ho...

example 2

[0038] Preparation of additives: Mix cetyltrimethylammonium bromide and methyltriethoxysilane at a mass ratio of 1:1.

[0039] Catalyst of choice: cerium nitrate.

[0040] Preparation of additives: Stir sodium dodecylbenzenesulfonate, cetyltrimethylammonium bromide and 300-mesh vermiculite particles evenly at a mass ratio of 1.3:1:2 to obtain additives.

[0041] Anionic polyacrylamide was purchased from Henan Secco Environmental Technology Co., Ltd.

[0042] A preparation method of concrete anti-cracking agent, the preparation method comprises the steps of:

[0043](1) Take kyanite and calcium carbide slag at a mass ratio of 1:4, put them into a pulverizer and grind them at 800r / min for 50 minutes, collect the crushed materials, and put them in a calciner for calcination. First, heat up to 1100°C and calcine for 40 minutes , heated to 1350°C, calcined for 2 hours, then heated to 1500°C, calcined for 3 hours, collected the calcined product, put the calcined product, additive ...

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Abstract

The invention discloses an anti-cracking agent for concrete and belongs to the technical field of concrete. Fibrous mullite crystals are formed from kyanite by high-temperature calcination, permeability is improved, gap filling by the anti-cracking agent is improved, the kyanite is irreversible after expansion, internal clearance is increased, electric furnace slag after high-temperature decomposition is supported, then granules are wrapped and infiltrated with anionic polyacrylamide, free calcium ions are adsorbed, calcium silicate gel is formed with substances in the anti-cracking agent andfills the gaps, chitosan is used for modification, antibacterial performance of the anti-cracking agent is enhanced, gel strength is improved, and the effect of the anti-cracking agent is further improved. The problems that the conventional anti-cracking agent for the concrete is higher in water absorptivity which is unfavorable for cracking resistance, and a water reducer needs to be added to theanti-cracking agent to offset influence of the water absorption effect on water consumption are solved.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a preparation method of a concrete anti-cracking agent. Background technique [0002] Concrete is one of the most important contemporary civil engineering materials. It has the characteristics of abundant raw materials, low price, and simple production process. At the same time, the hardened concrete has the characteristics of high compressive strength, good durability, and a wide range of strength grades. However, since concrete is a hydraulic material, during its preparation, hardening and use, voids and water loss and shrinkage are often formed inside it, resulting in defects such as poor impermeability and waterproof performance, and many shrinkage cracks. In order to solve the above-mentioned defects of concrete, a certain amount of functional admixtures are usually added to the concrete, such as expansion agents, anti-cracking agents, etc. The expansion compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B14/46
CPCC04B14/4656C04B40/0039C04B2103/60C04B22/064C04B24/005C04B24/42C04B24/2652C04B24/38C04B24/026C04B14/202C04B24/20C04B14/303C04B22/04C04B22/085
Inventor 张芸徐克程依
Owner 张芸