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

A concrete and anti-segregation technology, which is applied to the processing of building materials, construction, building construction, etc., can solve the problems of adverse effects on the anti-cracking performance of pumped concrete, the decrease of the viscosity of pumped concrete, and the impact on the uniformity of concrete, so as to improve Anti-segregation performance, improve thixotropy, and prevent heavy components from settling

Active Publication Date: 2022-04-19
四川鼎德商品混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Embodiment 1

[0040] Embodiment 1: a kind of preparation method of super anti-dispersion, anti-segregation concrete, comprises the steps:

[0041] Take 0.55kg of praseodymium nitrate, add water to prepare a praseodymium nitrate aqueous solution with a mass concentration of 4%, add 2.5kg of sepiolite fibers, stir at a speed of 100 rpm, heat to 75°C for 240min, filter, and complete the praseodymium modification. Prepare praseodymium-modified sepiolite fiber; get 1kg of 2-hydroxyethyltrimethylammonium chloride, add water to prepare a 2-hydroxyethyltrimethylammonium chloride aqueous solution with a mass concentration of 6%, add praseodymium modified The permanent sepiolite fiber was stirred at a speed of 100 rpm, heated to 75°C for 200 minutes, filtered, and the filter cake was dried at 100°C for 180 minutes to complete the organic modification and obtain the modified sepiolite fiber.

[0042] S1 Mixing: Weigh 160kg of gravel, add 300kg of sand, 185kg of fly ash, 2.2kg of polyethylene glycol an...

Embodiment 2

[0045] The difference between embodiment 2 and embodiment 1 is that no polyethylene glycol is added in embodiment 2, and the others are consistent with embodiment 1.

Embodiment 3

[0047] The difference between embodiment 3 and embodiment 1 is that no carboxypropyl methyl cellulose ether is added in embodiment 3, and the others are consistent with embodiment 1.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B20/02C04B14/46E04G21/02E04G21/08
CPCC04B28/02C04B20/023E04G21/02E04G21/08C04B2201/50C04B2111/343C04B18/08C04B2103/302C04B24/32C04B24/16C04B14/4643C04B22/085C04B24/12C04B24/383
Inventor 曾磊周游
Owner 四川鼎德商品混凝土有限公司
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