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Composite binding material doped with low-temperature burned clay and preparation method of composite binding material

A technology of composite cementitious materials and fired clay, which is applied in the field of building materials, can solve the problems such as the difficulty of direct utilization of coal series kaolin, and achieve the effects of inhibiting early shrinkage cracking, dense concrete structure, and accelerated hydration

Inactive Publication Date: 2016-07-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is the reason why coal-measure kaolin is difficult to use directly

Method used

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  • Composite binding material doped with low-temperature burned clay and preparation method of composite binding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1, a composite cementitious material mixed with low-temperature calcined clay. The coal-series kaolin is crushed and then calcined at 550°C for 1 hour. The calcined coal-series kaolin is quenched with wind, and the cooled calcined clay is powdered together with gypsum. Grind until the specific surface area is 300m 2 / kg; and then mixed with Portland cement, slag powder, fly ash and expansion agent to obtain a composite cementitious material. The weight ratio of each component is: Portland cement 100, low temperature burnt clay 10, S95 slag powder 5, fly ash 5, gypsum 2, expansion agent 2. The performance test results are shown in Table 1.

Embodiment 2

[0037] Example 2, a composite cementitious material mixed with low-temperature calcined clay. The coal-series kaolin is crushed and then calcined at 550°C for 1 hour. The calcined coal-series kaolin is quenched with wind, and the cooled calcined clay is powdered together with gypsum. Grind until the specific surface area is 350m 2 / kg; and then mixed with Portland cement, slag powder, fly ash and expansion agent to obtain a composite cementitious material. The weight ratio of each component is: Portland cement 100, low temperature burnt clay 30, S95 slag powder 15, fly ash 15, gypsum 3, expansion agent 5. The performance test results are shown in Table 1.

Embodiment 3

[0038] Example 3, a composite cementitious material mixed with low-temperature calcined clay. The coal-series kaolin is crushed and then calcined at 600°C for 1 hour. The calcined coal-series kaolin is quenched with wind, and the cooled calcined clay is powdered together with gypsum. Grind until the specific surface area is 350m 2 / kg, and then mixed with Portland cement, slag powder, fly ash and expansion agent to obtain a composite cementitious material. The weight ratio of each component is: Portland cement 100, low temperature burnt clay 50, S105 slag powder 25, fly ash 25, gypsum 5, expansion agent 8. The performance test results are shown in Table 1.

[0039] Table 1 embodiment performance test result

[0040]

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Abstract

The invention belongs to the technical field of building materials and particularly relates to a composite binding material doped with low-temperature burned clay and a preparation method of the composite binding material. The composite binding material comprises Portland cement, low-temperature burned clay, slag powder, coal ash, gypsum and an expanding agent, wherein the low-temperature burned clay is coal series kaolinite burned at the temperature of 550-600 DEG C and has very high pozzolanic activity. According to the composite binding material, the preparation process is simple, and a large amount of industrial waste can be utilized, so that the pressures of insufficient quantity and non-uniform distribution of slag powder and coal ash can be relieved, meanwhile, the proportion of mixed materials in the binding material can be increased, the proportion of cement can be decreased, and purposes of saving energy and reducing consumption are achieved; and the composite binding material can be used for preparing building mortar, pavement cushions, aerated concrete, mass concrete and the like, and therefore, the cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a composite cementitious material mixed with low-temperature calcined clay and a preparation method thereof. Background technique [0002] In the manufacturing process of building materials, a material called active composite material is widely used. In the cement production process, the use of waste admixtures can not only reduce the amount of cement clinker, reduce the cost of cement production, but also reduce environmental pollution through the recycling of waste, and at the same time improve the performance of cement (such as reducing Hydration heat, enhanced corrosion resistance and inhibition of alkali-aggregate reaction, etc.), so that cement products can meet the needs of different occasions. [0003] In recent years, my country's cement production has increased year after year. In 2014, my country's cement production reached 2.467 billion tons. ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/04C04B14/10
CPCC04B40/0039C04B20/04C04B2201/50C04B7/02C04B18/08C04B18/141C04B22/143C04B2103/0068C04B14/106
Inventor 孙振平曾文波郭二飞刘毅唐晓博张世杰
Owner TONGJI UNIV
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