High-pumping LC15 ceramsite concrete and preparation method thereof

Abstract

The invention discloses high pumping LC15 ceramsite concrete and a preparation method thereof. The high pumping LC15 ceramsite concrete comprises the following components: cement, sand, ceramsite, mixing water, fly ash, an additive, ore slag powder, a pumping agent and aqueous polyurethane emulsion; the additive is a polycarboxylate superplasticizer, and the pumping agent is compounded by the following components: modified starch ether, polyacrylamide, sodium carboxymethyl cellulose, a retarder, epoxy resin and water. The high pumping LC15 ceramsite concrete enables the ceramsite to fully absorb water, and then through the aqueous polyurethane emulsion and the pumping agent, the bonding of the ceramsite with cementing materials such as the cement, the fly ash and the like is promoted, thecohesiveness and water retention of the ceramsite concrete are increased, and the ceramsite is not easy to float up, delaminate and segregate; and the aqueous polyurethane emulsion is used to adhere an inorganic heat preservation modifier to the ceramsite, and the weight of the ceramsite is increased, so that the ceramsite is not easy to float up, delaminate and segregate, and the heat preservation performance of the ceramsite concrete is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-pumpable LC15 ceramsite concrete and a preparation method thereof. Background technique [0002] With the reform of wall materials, building energy conservation is becoming more and more important, and the design and application of wall bodies are mainly sustainable in the direction of light weight, good energy saving and thermal insulation performance, high strength, high durability and high safety. Therefore, compared with ordinary concrete, ceramsite concrete, which has good workability, high strength and light weight, fire resistance, self-insulation, moisture and sound insulation, volume stability and durability safety, has attracted more and more attention and recognition in engineering applications. Good economic and social benefits have been achieved in reducing the weight of the structure, saving the amount of materials, comprehensively utilizing resour...

AI Technical Summary

Problems solved by technology

However, when the ceramsite concrete is pumped in production, there are problems such as ceramsite is easy to float, delaminate, and segregate. In addition, due to the high water absorption rate of ceramsite, especially under the action of pump pressure, ceramsite will rush to the pump due to pressure. At the same time, the water in the concrete is pressed into the interior of the ceramsite during the pumping process, which has a great impact on the performance of the mixture, resulting in local concrete lumps, which can easily cause pumping difficulties or even blockage. Tube phenomenon, the smaller the bulk density of ceramsite concrete, the greater the slump and expansion, the more prone to the above problems, the current technology is basically by controlling the concrete slump below 160mm, adding fly ash, silica fume and other glue However, there are still many phenomena such as pipe plugging, ceramsite layering and segregation, and difficulty in construction.

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