Water-absorbent concrete and preparation method thereof

A water-absorbing resin and concrete technology, which is applied in the field of concrete and its preparation, can solve the problems affecting the construction cost and construction period, the inconvenience of aggregate material collection and transportation, and the large demand for aggregate, so as to facilitate the secondary hydration reaction, Light weight, simple and practical preparation process

Active Publication Date: 2013-01-02
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, the preparation of a large amount of conventional concrete requires a great deal of raw materials, especially aggregates, and it is necessary to build a special stockyard for concrete preparation. Especially for special areas such as remote sea islands and reefs, the collection and tr

Method used

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  • Water-absorbent concrete and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] Referring to the traditional ordinary concrete mix ratio of strength grade C30, the water-absorbent resin concrete is prepared according to the mix ratio of cement:sand:water-absorbent resin expansion body:salt water=1:0.7:2:0.4, and the cement is Xiaonanhai brand 42.5 ordinary silicate Sea sand with a fineness modulus of 0.6 is used for cement and sand, and the water-absorbing resin expansion body is formed by self-expanding by adding acrylic resin powder and saline with a mass concentration percentage of 2%.

[0020] The preparation process of water-absorbent resin concrete is as follows: first, add salt water to acrylic water-absorbent resin powder to form particles and blocks with a volume expansion rate of 30 times, such as figure 1 As shown, then add salt water to the cement and sand mixture according to the water-cement ratio of 0.4 and stir in the mixer, and finally add water-absorbing resin expansion particles and lumps and stir to make it fully uniform. Make 1...

Embodiment 2

[0022] Referring to the mix ratio of traditional ordinary concrete with a strength grade of C30, the water-absorbing resin concrete is prepared according to the mix ratio of cement: water-absorbing resin expansion body: tap water = 1:2.7:0.4. The expansion body is formed by self-expansion of acrylic water-absorbing resin powder and tap water.

[0023] The preparation process of water-absorbent resin concrete is as follows: firstly, tap water is mixed into acrylic water-absorbent resin powder to form granules and lumps with a volume expansion rate of 30 times, and then water is added to cement at a water-cement ratio of 0.4 and mixed in a mixer , and finally add water-absorbing resin expansion particles and lumps and stir to make them fully uniform. Make 18 water-absorbing resin concrete specimens, 6 specimens with a size of 100mm×100mm×100mm and 6 specimens with a size of 100mm×100mm×300mm are compressed, and 6 specimens with a size of 100mm×100mm×500mm are folded. The streng...

Embodiment 3

[0025] The water-absorbing resin concrete and the test piece were prepared with reference to the mix ratio and process of Example 1. The difference from Example 1 was that Xiaonanhai brand 32.5 composite Portland cement was used as the cement, and the volume expansion rate of the water-absorbing resin expansion body was 50 times.

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Abstract

The invention discloses water-absorbent concrete and a preparation method thereof. The water-absorbent concrete comprises cement-kind gelling materials and aggregate, and the aggregate is water-absorbent resin expansion parts which replace aggregate such as broken stone or pebble in components of common concrete. The preparation method for the water-absorbent concrete includes: firstly permeating water into water-absorbent resin powder to enable the water-absorbent resin powder to be quickly expanded by at least 20 times, then adding water in quantity needed for hydration reaction into the cement-king gelling materials for blending to form cement paste, stirring the water-absorbent resin expansion parts with the paste to enable the water-absorbent resin expansion parts to be coated by the cement paste, and finally forming the water-absorbent resin concrete after setting and hardening. The water-absorbent resin concrete prepared by the method is high in strength, light in dead weight, convenient for long-distance and high-drop pumping construction of low-power centrifugal pumps, capable of being mixed and transported on shipboard, free of setting of special material sites, simple in preparation process and capable of effectively solving the problem of a great quantity of conventional raw material supply and inconvenience in transport in high-sea island and reef and the like.

Description

technical field [0001] The invention relates to a concrete and a preparation method thereof. Background technique [0002] Concrete is widely used in civil engineering because of its easy preparation, easy forming of components, and outstanding characteristics such as hydraulicity. However, the room for improving the strength of conventional traditional concrete has been limited. The reason is that the composition of concrete is mainly composed of water, cement, sand, and aggregates such as gravel or pebbles, and the demand for aggregates is extremely high. After the concrete is hydrated, set and hardened, the aggregates cannot be evenly dispersed in the cement mortar, and stress concentration occurs at the sharp corners of the crushed stone aggregates and stress slip occurs at the surface of the pebble aggregates, making micro-cracks early The ground is formed on the interface between the aggregate and the cement mortar. Under the continuous application of external loads, ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B16/08
Inventor 程华程志军潘晓春候忠明
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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