Conditioning agent for segregated concrete and conditioning method thereof

A technology of conditioner and concrete, applied in the field of conditioner of segregated concrete, can solve the problems of environmental pollution, concrete segregation, over-mixing of admixtures, etc., and achieve the effects of improving segregation resistance, improving utilization rate, and improving workability.

Inactive Publication Date: 2019-12-13
珠海春禾新材料研究院有限公司
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Problems solved by technology

Once the quality of raw materials fluctuates greatly, it will easily lead to over-mixing of admixtures and the quality problem of concrete segregation.
At present, there is no good treatment method for co

Method used

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  • Conditioning agent for segregated concrete and conditioning method thereof
  • Conditioning agent for segregated concrete and conditioning method thereof

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Embodiment Construction

[0027] A conditioner for segregated concrete, which is composed of kaolin, limestone powder and dihydrate gypsum. The kaolin uses low-quality kaolin calcined tailings and its mass fraction is 85-95%, and the limestone powder is ground and its mass fraction is 0-10. %, the mass fraction of dihydrate gypsum is 5%.

[0028] The fineness of low-quality kaolin calcined tailings (45 μm square hole sieve) ≤ 5%, loss on ignition ≤ 4% (mass fraction), free calcium oxide content ≤ 1% (mass fraction); when the dosage is 30% , the 28d activity index of low-quality kaolin calcined tailings ≥ 90%. Low-quality kaolin Calcined tailings are produced by calcining low-quality kaolin at high temperature (800°C-1000°C). Kaolinite minerals are composed of kaolinite cluster minerals such as kaolinite, dickite, pearlite and halloysite, and the main mineral component is kaolinite. The crystal chemical formula of kaolinite is 2SiO 2 ·Al 2 o 3 2H 2 O, whose theoretical chemical composition is 46.5...

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Abstract

The invention provides a conditioning agent for segregated concrete and a conditioning method thereof. The conditioning agent can effectively recover the working performance of a segregated concrete mixture, wherein the conditioning agent comprises kaolin, limestone powder and dihydrate gypsum, the kaolin adopts low-quality kaolin calcined tailings, the mass fraction of the kaolin is 85-95%, the limestone powder is ground finely, the mass fraction of the limestone powder is 0-10%, and the mass fraction of the dihydrate gypsum is 5%. The conditioning method comprises the steps of determining the volume amount of the segregated concrete, determining the dosage of a gel material, determining the mixing amount and dosage of the conditioning agent, adding the conditioning agent and stirring. The slump loss and the setting time of the segregated concrete mixture doped with the conditioning agent by the regulating method are basically the same as those of normal concrete, and the strength ofhardened concrete is even slightly improved. It is proved that the conditioning agent has no obvious influence on the setting time and slump loss of the concrete, and on the contrary, the strength ofthe concrete can be improved.

Description

【Technical field】 [0001] The invention relates to a regulator for segregated concrete and a regulator method thereof. 【Background technique】 [0002] Concrete is made of cement as the main cementitious material, mixed with water, sand, stone, and chemical admixtures and mineral admixtures when necessary, mixed and mixed in an appropriate proportion to form a mixture, which is hardened after a certain period of time. . [0003] Concrete is the most widely used and used building material in the world today. Major advances in concrete engineering technology such as prestressed concrete structures and high-performance concrete admixtures represented by polycarboxylate superplasticizers have greatly promoted economic development and social development. improvement. Concrete is one of the key materials supporting the development of my country's engineering construction and plays an irreplaceable role in my country's infrastructure construction. At present, my country's annual co...

Claims

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Application Information

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IPC IPC(8): C04B22/14
CPCC04B40/0042C04B18/023C04B14/28C04B22/143
Inventor 郭伟黄赟刘奕周董健罗昕旻
Owner 珠海春禾新材料研究院有限公司
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