A super anti-dispersion, anti-segregation concrete and its preparation method and construction technology

Abstract

The invention discloses a super-dispersion-resistant and segregation-resistant concrete as well as a preparation method and construction technology thereof, and relates to the technical field of building materials. A super anti-dispersion and anti-segregation concrete, comprising the following concrete raw materials: 80-160 parts of cement, 70-150 parts of water, 5-12 parts of water reducing agent, 1.5-3.5 parts of isopentenol polyoxyethylene ether, 2- 1.2-2 parts of acrylamide-2-methylpropanesulfonic acid; concrete raw materials also include concrete powder and modified sepiolite fiber, concrete powder includes: 120-200 parts of crushed stone, 250-350 parts of sand, powder Coal ash 150‑220 parts; modified sepiolite fiber includes: sepiolite fiber, praseodymium nitrate and 2‑hydroxyethyltrimethylammonium chloride. It has the advantage of good crack resistance. The preparation method includes the following steps: mixing materials, concrete preparation and the like. The preparation method has the advantage of improving the anti-crack performance of the product.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a super-dispersion-resistant and segregation-resistant concrete, a preparation method and a construction process thereof. Background technique [0002] Pumped concrete is a concrete mixture that needs to be transported and poured along the delivery pipe with a concrete pump or pump truck. Pumped concrete is convenient for construction and is widely used in large-volume and high-rise buildings. In order to improve the fluidity of the pumped concrete so that it can be transported by a concrete pump, aggregates with smaller particle sizes are generally used for pumped concrete, and a certain amount of small-sized fly ash is generally added to the pumped concrete. [0003] CN107814524A discloses a preparation of ultra-fine sand pumping concrete, the weight percent of which is: 130-200 parts of ultra-fine sand, 3-8 parts of limestone machine-made sand, 130-150 parts of medi...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that due to the addition of a large amount of small-sized fly ash and ultra-fine sand in the preparation process of pumped concrete, the viscosity of pumped concrete is reduced, and segregation and bleeding are prone to occur, which affects the uniformity of concrete , which has a certain adverse effect on the crack resistance of pumped concrete

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