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Full-particle size ultrahigh-performance concrete composition

A concrete composition, ultra-high-performance technology, applied in the field of concrete composition, full-size ultra-high-performance concrete composition, can solve the problem of large shrinkage and deformation of cementitious materials, low water-binder ratio of high-performance concrete, and poor rheology And other problems, to achieve the effect of controllable rheological properties, good working performance and low price

Active Publication Date: 2014-04-30
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims at the problems existing in the prior art, such as low water-binder ratio of high-performance concrete, poor rheology in the preparation process, and difficulty in pumping, etc.; and large shrinkage deformation deficiency and defects caused by large amount of cementitious materials

Method used

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  • Full-particle size ultrahigh-performance concrete composition
  • Full-particle size ultrahigh-performance concrete composition
  • Full-particle size ultrahigh-performance concrete composition

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Embodiment 1 is the benchmark concrete, without adding other components such as admixtures and expansion agents, using pure cement as the cementitious material, sand using river sand, crushed stone using basalt, and superplasticizer using powder polycarboxylate reducing agent. Aqua with no added fiber. After the above materials are mixed, they are packaged, and the above-mentioned ratio of water is directly added to the site for mixing to obtain full-size ultra-high performance concrete.

Embodiment 2

[0050] In Example 2, the admixture is composed of superfine fly ash and silica fume in a ratio of 7:3, river sand is used for sand, basalt is used for crushed stone, and powdered polycarboxylate water reducer is used as superplasticizer. After the above materials are mixed, they are packaged, and the above-mentioned ratio of water is directly added to the site for mixing to obtain full-size ultra-high performance concrete.

Embodiment 3

[0051]In Example 3, the admixture is composed of ultrafine mineral powder and silica fume in a ratio of 8:2, the expansion agent is calcium oxide, the sand is river sand, the crushed stone is diabase, and the superplasticizer is powder polycarboxylate. Acid water reducing agent, polyvinyl alcohol fiber is used for synthetic fiber. After the above materials are mixed, they are packaged, and the above-mentioned ratio of water is directly added to the site for mixing to obtain full-size ultra-high performance concrete.

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Abstract

The invention discloses a full-particle size ultrahigh-performance concrete composition which is prepared from the following components: 100 parts of cement, 10-80 parts of admixture, 5-20 parts of expanding agent, 1-20 parts of viscosity regulator, 120-210 parts of sand, 80-140 parts of rubble and 5-10 parts of super plasticizer while certain volume dosage of fiber is added. The full-particle size ultrahigh-performance concrete composition disclosed by the invention has controllable rheological property and shrinkage strain property and ultrahigh mechanical property and durability. Water is directly added on the site according to a proportion, and the full-particle size ultrahigh-performance concrete can be obtained through forced stirring.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a concrete composition, in particular to a full particle size ultra-high performance concrete composition. Background technique [0002] With the continuous expansion of the scale of civil engineering and the continuous improvement of the level of science and technology, some important buildings with high-rise large-span and special functional requirements continue to appear, such as skyscrapers, super-long-span bridges, etc., requiring concrete to have higher strength and better durability. These requirements have led to the development of cement-based composite materials in the direction of high and ultra-high performance. Domestic and foreign scholars' research on ultra-high performance concrete mainly focuses on reactive powder concrete, or RPC for short. It improves the compactness by refining the particle size and achieves the purpose of improving the mechanical p...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/08C04B18/12C04B18/30C04B14/02
CPCY02W30/91
Inventor 崔巩刘加平刘建忠张倩倩周华新
Owner JIANGSU SOBUTE NEW MATERIALS
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