Nuclear power concrete additive and preparation method thereof

Abstract

The invention which belongs to the technical field of nuclear power concrete especially relates to a nuclear power concrete additive. The nuclear power concrete additive is prepared from the following raw materials, by mass, 30-80% of a polycarboxylic acid water reducer, 10-30% of a polycarboxylic acid slump retaining agent, 1-15% of a retarder, 0-0.5% of a water retaining agent, 0.1-2% of an air entraining agent, 1-20% of a shrinkage reducing agent, 0-0.5% of an antiseptic, 0.05-0.5% of a defoamer, and the balance water. The additive of the invention, which has the functions of concrete workability improvement, retardation (avoiding of cold seams caused by long-time construction), concrete temperature peak value reduction, concrete drying contraction reduction, introduction of minimal steam bubbles into concrete, concrete endurance improvement and the like, allows concrete to satisfy engineering needs.

Description

Technical field [0001] The invention belongs to the field of nuclear and concrete technology, which specializes in nuclear island concrete exterior agents. Background technique [0002] AP1000 nuclear power technology, AP1000 is an advanced non -dynamic pressure water pile nuclear power technology. Nuclear fuel made of uranium generates a large amount of thermal energy in the "reactor" device.The steam generator is generated in the steam generator. The steam pushes the turbine to rotate with the generator together. The electricity is constantly generated. The biggest feature of the AP1000 is the design concise, easy to operate, and make full use of many "unmoven security systems".It has further improved the safety of nuclear power plants, and at the same time, it can also significantly reduce the cost of nuclear power crew and the cost of long -term operation. [0003] In the past, there were a lot of concrete plus agents for nuclear power plants, but it was suitable for the thir...

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Problems solved by technology

[0003] In the past, there were many concrete admixtures suitable for nuclear power plants in China, but there was no polycarboxylic acid admixture suitable for AP1000 concrete used in third-generation nuclear power units. Because the third-generation nuclear power AP1000 was first applied in China, the project proposed higher requirements for concrete. Requirements, concrete admixtures play a key role in the various properties and durability of concrete. China has not yet used admixtures in this field, so it is urgent to develop polycarboxylate admixtures for AP1000 nuclear power unit concrete

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