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Method for producing seawater corrosion resistant cement by using construction waste

A construction waste and anti-seawater technology, which is applied in cement production, etc., can solve the problems that the concrete structure cannot reach the service life, the structure is difficult to reach the designed service life, and the durability of the concrete structure is affected, so as to achieve the continuous growth of strength in the later period and good economy. and social benefits, the effect of low price

Pending Publication Date: 2021-07-30
上海攀昂建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, many coastal water conservancy projects mainly use ordinary cement, and the corresponding seawater erosion-resistant concrete is mixed on site according to the requirements. However, due to the on-site mixing process and quality control problems, it is difficult for some structures to achieve the ideal design service life.
Poor construction will affect the durability of the concrete structure, such as defects in the concrete mixing process, incorrect dosage of admixtures, insufficient thickness of the steel protective layer, etc., which will make the concrete structure unable to reach the intended service life

Method used

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  • Method for producing seawater corrosion resistant cement by using construction waste

Examples

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Embodiment 1

[0026] A seawater corrosion-resistant cement produced from construction waste, comprising the following raw materials in parts by weight: 44 parts of sulphoaluminate cement clinker, 6 parts of early strength agent, 0.6 part of water reducing agent, 0.004 part of air-entraining agent, retarding 0.4 parts of activator, 10 parts of steel slag, 24 parts of construction waste and 0.09 parts of self-made activator.

[0027] Its production method comprises the following steps:

[0028] S1: The construction waste and water are mixed, then pulverized, and then dried to make the water content lower than 1.4%; the steel slag is dried, and the water content of the dried steel slag is lower than 2.8%, and then used for later use.

[0029] S2: Mix the construction waste particles obtained in step S1 with steel slag and grind them with a cement mill, then pass through a 100-mesh screen to dry, then mix with sulphoaluminate cement clinker, early strength agent and self-made activator and add ...

Embodiment 2

[0036] A seawater corrosion-resistant cement produced by using construction waste, including the following raw materials in parts by weight: 48 parts of sulphoaluminate cement clinker, 8 parts of early strength agent, 0.8 part of water reducing agent, 0.006 part of air-entraining agent, retarding 0.7 parts of agent, 16 parts of steel slag, 28 parts of construction waste and 0.12 parts of self-made activator.

[0037] Its production method comprises the following steps:

[0038] S1: The construction waste and water are mixed, then pulverized, and then dried to make the water content lower than 1.4%; the steel slag is dried, and the water content of the dried steel slag is lower than 2.8%, and then used for later use.

[0039] S2: Mix the construction waste particles obtained in step S1 with steel slag and grind them with a cement mill, then pass through a 150-mesh screen to dry, then mix with sulphoaluminate cement clinker, early strength agent and self-made activator and add t...

Embodiment 3

[0046] A seawater corrosion-resistant cement produced by using construction waste, comprising the following raw materials in parts by weight: 46 parts of sulphoaluminate cement clinker, 7 parts of early strength agent, 0.7 part of water reducing agent, 0.005 part of air-entraining agent, retarding 0.6 parts of activator, 14 parts of steel slag, 26 parts of construction waste and 0.11 parts of self-made activator.

[0047] Its production method comprises the following steps:

[0048] S1: The construction waste and water are mixed, then pulverized, and then dried to make the water content lower than 1.4%; the steel slag is dried, and the water content of the dried steel slag is lower than 2.8%, and then used for later use.

[0049] S2: Mix the construction waste particles obtained in step S1 with steel slag and grind them with a cement mill, then pass through a 120-mesh screen to dry, then mix with sulphoaluminate cement clinker, early strength agent and self-made activator and ...

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Abstract

The invention discloses a method for producing seawater corrosion resistant cement by using construction waste. The seawater corrosion resistant cement is prepared from the following raw materials in parts by weight: 44 to 48 parts of sulphoaluminate cement clinker, 6 to 8 parts of an early strength agent, 0.6 to 0.8 part of a water reducing agent, 0.004 to 0.006 part of an air entraining agent, 0.4 to 0.7 part of a retarder, 10 to 16 parts of steel slag, 24 to 28 parts of construction waste and 0.09 to 0.12 part of a self-made activating agent. The seawater corrosion resistant cement disclosed by the invention has the excellent characteristics of high strength, seawater corrosion resistance, seawater scouring resistance and the like in addition to the performance of ordinary cement, and is particularly suitable for underground engineering, ports, wharfs and other engineering corroded by erosion media.

Description

technical field [0001] The invention belongs to the technical field of cement production, and in particular relates to a method for producing seawater corrosion-resistant cement with construction waste. Background technique [0002] For a long time, cement has been widely used in construction projects as an important cementitious material. In 1756, British engineer J. Smeaton discovered when studying the characteristics of some lime hardening in water: to obtain hydraulic lime, it must be fired with limestone containing clay; The ideal composition is composed of hydraulic lime and volcanic ash. This important discovery laid a theoretical foundation for the research and development of modern cement. In 1796, British J. Parker fired a kind of cement with marl, which was brown in appearance, much like the mixture of lime and volcanic ash in ancient Rome, named Roman cement. Because it uses natural marl as raw material and is directly fired without ingredients, it is also cal...

Claims

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Application Information

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IPC IPC(8): C04B7/24C04B7/17C04B7/36C04B24/22C04B24/24C08G14/073C04B103/12C04B103/30
CPCC04B7/243C04B7/17C04B7/36C04B40/0039C04B24/226C08G14/06C04B2103/12C04B2103/302Y02P40/10
Inventor 郑家豪
Owner 上海攀昂建筑工程有限公司
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