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Composite modified concrete and testing method of interfacial transition zone of composite modified concrete

A composite modification, concrete technology, used in the application of stable tension/pressure to test material strength, measurement devices, climate sustainability, etc.

Active Publication Date: 2018-10-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no compound modification method for the transition zone of the concrete interface, and as the weak link of concrete, the modification of the transition zone of the concrete interface is very important

Method used

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  • Composite modified concrete and testing method of interfacial transition zone of composite modified concrete
  • Composite modified concrete and testing method of interfacial transition zone of composite modified concrete
  • Composite modified concrete and testing method of interfacial transition zone of composite modified concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0040] The raw materials were weighed according to the following proportions: 100 parts of cement, 250 parts of gravel, 160 parts of sand, 39 parts of water, 30 parts of fly ash, 1.2 parts of nano-silica, and 0.5 parts of superplasticizer.

[0041] The preparation process of the above-mentioned modified concrete is as follows:

[0042] (1) First, put the nano-silica and all the water into the ultrasonic system, the operating frequency of the ultrasonic system is 40khz, and the ultrasonic power supply is 50w, to prepare the nano-modifier dispersion;

[0043] (2) Then put cement, fly ash, silica fume, gravel, sand, and high-efficiency water reducer into the concrete mixer and stir for 4 minutes, so that all raw materials can be evenly mixed;

[0044] (3) Then pour the nano-dispersion into the mixer and stir for 6 minutes until a uniform concrete mixture is obtained;

[0045] (3) Put the concrete mixture into the mold for molding, remove the mold after one day, and maintain it u...

Embodiment example 2

[0051] The raw materials were weighed according to the following proportions: 100 parts of cement, 250 parts of gravel, 160 parts of sand, 39 parts of water, 30 parts of fly ash, 9 parts of silica fume, 1.2 parts of nano-silica, and 1.5 parts of superplasticizer.

[0052] The preparation process of the above-mentioned modified concrete is as follows:

[0053](1) First, put the nano-silica and all the water into the ultrasonic system, the operating frequency of the ultrasonic system is 40khz, and the ultrasonic power supply is 50w, to prepare the nano-modifier dispersion;

[0054] (2) Then cement, fly ash, silica fume, gravel, sand, and high-efficiency water reducer are put into the concrete mixer and stirred for 4 minutes, so that all raw materials can be evenly mixed;

[0055] (3) Then pour the nano-modifier dispersion into the mixer and stir for 6 minutes until a uniform concrete mixture is obtained;

[0056] (4) Put the concrete mixture into the mold for molding, remove th...

Embodiment example 3

[0059] The raw materials were weighed according to the following proportions: 100 parts of cement, 250 parts of gravel, 160 parts of sand, 39 parts of water, 30 parts of fly ash, 9 parts of silica fume, 1.8 parts of nano-titanium dioxide, and 1 part of superplasticizer.

[0060] The preparation process of the above-mentioned modified concrete is as follows:

[0061] (1) First, put nano-titanium dioxide and all water into the ultrasonic system, the operating frequency of the ultrasonic system is 40khz, and the ultrasonic power supply is 50w, to prepare the nano-modifier dispersion;

[0062] (2) Then cement, fly ash, silica fume, gravel, sand, and high-efficiency water reducer are put into the concrete mixer and stirred for 4 minutes, so that all raw materials can be evenly mixed;

[0063] (3) Then pour the nano-modifier dispersion into the mixer and stir for 6 minutes until a uniform concrete mixture is obtained;

[0064] (4) Put the concrete mixture into the mold for molding,...

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Abstract

The invention discloses a testing method of an interfacial transition zone of composite modified concrete, and relates to the field of building materials. The composite modified concrete is characterized by comprising the raw materials in parts by weight: 100 parts of cement, 240 to 260 parts of pebbles, 150 to 170 parts of sands, 35 to 45 parts of water, 20 to 30 parts of fly ash, 3 to 12 parts of silicon ash, 0.5 to 2 parts of nanometer materials, and 0.5 to 1.5 parts of a high-effect water reducing agent. According to the method, calcium hydroxide enriched in the interfacial transition zoneof composite modified concrete is properly absorbed through synergism of the nanometer materials and the silicon ash with grain composition and pozzolanic activity, so that C-S-H gel with better adhesive property is produced; in addition, gaps in the interfacial transition zone are properly filled with optimized grain composition, so that the interfacial transition zone of composite modified concrete is effectively improved. Cases prove that the method can effectively improve the bonding strength of the interfacial transition zone and ensure that the interfacial transition zone is dense, thereby improving the mechanical property and chloride penetration resistance property of the concrete.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for testing composite modified concrete and its interface transition zone. Background technique [0002] Cement concrete is the most widely used building material in modern times. The interface transition zone of concrete is the weak link of concrete, which has an important influence on the strength and durability of concrete. Due to the low density of this area, calcium hydroxide is enriched and has a certain orientation, and the morphology, composition, and structure of its hydration products are very different from those in cement concrete, which makes the interfacial transition area of ​​concrete It directly affects the mechanical properties and durability of concrete, so optimizing the interfacial transition zone of concrete is crucial to the durability of concrete. [0003] At present, mineral admixtures are widely used in concrete. As an active admixture, silic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06C04B18/08C04B18/14C04B14/30C04B20/00G01N3/08G01N15/08G01N19/04
CPCC04B14/062C04B14/305C04B18/08C04B18/146C04B20/008C04B28/04C04B2201/10C04B2201/50G01N3/08G01N15/08G01N19/04C04B14/02C04B14/06C04B22/002C04B2103/302Y02W30/91
Inventor 周宗辉王衍升程勇袁连旺王金邦程新
Owner UNIV OF JINAN
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