A kind of water-absorbing resin aggregate concrete and its preparation method

Abstract

The invention relates to a water-absorbing swellable resin aggregate concrete and a preparation method thereof. The water-absorbing swellable resin aggregate concrete is composed of 300-420 parts by weight of cement, 186-306 parts by weight of admixtures, and 0-624 parts by weight of water-absorbing swellable aggregate. 0-954 parts by weight of fine aggregate, 87-131 parts by weight of mixing water, 11-14 parts by weight of water reducing agent, and 1.8-2.2 parts by weight of fiber are mixed by a certain preparation process. In the present invention, a spherical polymer water-absorbing resin particle whose particle size can be adjusted is used as a water-absorbing swelling aggregate, and by controlling the particle size of the water-absorbing swelling aggregate, a concrete with an adjustable internal pore structure is prepared. The inside of the concrete has a regular shape, Evenly distributed closed spherical holes, and has the advantages of low density, high strength, good performance and saving concrete solid raw materials, and the water-absorbing swelling aggregate is small in volume before absorbing water, light in weight, and convenient for transportation.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a water-absorbing swelling resin aggregate concrete and a preparation method thereof. Background technique [0002] In recent years, my country's annual concrete output has exceeded 50% of the world's annual concrete output for many consecutive years. In 2011, my country's actual concrete output reached 1.33 billion cubic meters. It is estimated that my country's actual concrete output will reach 1.5 billion cubic meters in 2012. For ordinary concrete, the total volume of gravel and sand accounts for 70% to 80% of the concrete volume, and billions of tons of gravel and sand are consumed every year, which has a very large impact on resources and the environment; in addition, in ordinary concrete The total weight of sand and gravel aggregates accounts for more than 80% of the total weight of finished concrete. For areas where local resources cannot provide suitable agg...

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Problems solved by technology

However, these materials all have some defects in varying degrees: there are interface problems between the rubber particles and the concrete matrix, which often lead to "cavities" with irregular shapes due to poor bonding; broken waste concrete is not easy to process, The particle shape is difficult to control, and has high water absorption rate and high mud content; waste glass is inconvenient to process, and the particle shape is not easy to meet the requirements; industrial waste residue has potential alkali activity, and there will be some durability problems in the later stage, and there are also water absorption rate and mud content The problem of high volume; the strength of light aggregate fired from sludge is generally not high, and the water absorption rate is high, and the energy consumption is high

In addition, these replacement materials mentioned above still have problems such as large volume, high quality, and difficult transportation.

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