Underwater non-dispersible concrete and its preparation method

Abstract

The invention discloses underwater non-dispersed concrete and a preparation method thereof. The underwater non-dispersed concrete is characterized by being prepared from the following components in parts by weight: 590 to 630 parts of sand, 840 to 900 parts of stone, 320 to 370 parts of cement, 30 to 45 parts of fly ash, 130 to 170 parts of water, 5 to 7 parts of flocculant, 15 to 22 parts of early strength agent and 20 to 35 parts of adjuvant. The underwater non-dispersed concrete has the advantages that the concrete can directly make contact with environmental water in the underwater pouring process; in addition, all the components of a concrete mixture have better dispersion resistance, and both the frost resistance and the early strength are improved to a certain extent.

Description

technical field [0001] The invention relates to the field of concrete, in particular to an underwater non-dispersible concrete and a preparation method thereof. Background technique [0002] Human society is constantly developing and progressing, especially in the middle and late 20th century, the development is becoming increasingly rapid. Along with the development and progress of human society, there is an increasingly serious shortage of mineral energy and space resources. Human beings turn to rivers, lakes and offshore to develop and utilize underwater space and mineral resources. Underwater engineering requires higher quality and performance of construction materials due to its complex surrounding environment. Concrete is still the most widely used and most important building material in underwater engineering, and the performance of concrete is directly related to the quality and service life of underwater engineering. Therefore, engineering technology circles pay mo...

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Problems solved by technology

[0003] When ordinary concrete is used for pouring underwater projects, if it is in direct contact with water, the erosion of water will separate the cement slurry from the aggregate, resulting in the loss of part of the cement slurry, and the cement in the remaining cement slurry will remain in a suspended state in the water for a long time. The cement has solidified when it sinks and loses the ability to bond with the aggregate. When ordinary concrete is poured directly in water, it will be divided into two parts: a layer of aggregate and a layer of hardened cement slurry. Such concrete does not meet the requirements of underwater engineering technology. Require

[0004] In order to solve the above problems, people have mainly improved the construction method to reduce or eliminate the contact between the concrete mixture and water, so as to avoid the influence of water; the traditional methods commonly used in underwater concrete construction include the conduit method and the bottom-opening container method. etc., but the above method has disadvantages such as high cost, long construction period, complex construction equipment, high construction technical requirements, difficult to guarantee project quality, and easy to pollute the environment.

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