A kind of ultra-high performance concrete and preparation method thereof

An ultra-high-performance concrete technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of large shrinkage, mismatch between strength and shrinkage, etc., to slow down the decline, make up for adverse effects, stress-reducing effect

Active Publication Date: 2022-08-09
纳思同无锡科技发展有限公司
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Problems solved by technology

[0014] In order to meet the current engineering practical requirements of UHPC and overcome technical problems such as large shrinkage of existing UHPC and mismatch between strength and shrinkage, the present invention discloses a UHPC material with low shrinkage and meeting engineering practical requirements and a preparation method thereof

Method used

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  • A kind of ultra-high performance concrete and preparation method thereof
  • A kind of ultra-high performance concrete and preparation method thereof
  • A kind of ultra-high performance concrete and preparation method thereof

Examples

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Embodiment 1～3

[0063] An ultra-high-performance concrete, raw materials: cement, silica ash, mineral powder, mechanism sand, gravel, steel fiber, water reducing agent, water, calcium sulfate-calcium sulfate composite expansion, bisexual ion polymer, 2 2, 2 -Methyl-2-propane, porous silicon micro powder, high water absorption resin, inorganic gel coagulant, light-yaki carbonate? According to the cooperation ratio in Table 1, there are three groups of implementation. It should be noted that the cement slurry solution of high water absorption resin in the embodiment is 30 times the water absorption multiples of the cement slurry, and the actual water glue ratio of the embodiments of each group is 0.17.

[0064] Table 1 Raw material ratio of Example 1 ~ 3 (KG / M 3 Cure

[0065]

[0066]

[0067]During the preparation process, the coordination ratio is accurate to be accurately selected by the coordination ratio. The specific preparation process is as follows: First of all, 1 / 5 of water, bisexual ...

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Abstract

The invention discloses an ultra-high performance concrete and a preparation method thereof, belonging to the technical field of concrete materials. The raw materials used per cubic meter include by weight: calcium oxide-calcium sulfoaluminate composite expansion agent 60-75kg / m 3 , zwitterionic polymer 1.8~2.1kg / m 3 , 2-methyl-2-propanol 9.5~11.5kg / m 3 , Porous silicon powder 5~7kg / m 3 , Super absorbent resin 1.05~1.35kg / m 3 , Inorganic gelling agent 10~15kg / m 3 And light burnt calcium carbonate whisker 14.3~28.6kg / m 3 The invention can realize that the strength of UHPC containing coarse aggregate is not less than 165MPa and the shrinkage reduction rate is not less than 65% under standard curing conditions, so as to prepare a low-shrinkage ultra-high performance concrete material that can meet the practical needs of engineering.

Description

Technical field [0001] The present invention involves the field of concrete materials, especially an ultra -high -performance concrete and their preparation methods. Background technique [0002] Ultra High Performance Concrete (UHPC) is increasingly applied in the fields of bridges and buildings in the fields of bridges and buildings due to its high strength, high toughness and high durability. But at present, the contraction problem is still one of the main technical problems facing UHPC. [0003] There are two main types of UHPC's contraction: self -contraction and dry contraction. Among them, contraction usually accounts for about 2 / 3 of the total UHPC shrinkage. In terms of mechanism, the self -contraction and dry contraction of UHPC are due to the loss of pores, which reduces the concave surface in the pores and produces enclosure on the pore wall, causing the capillary wall to be compressed. The UHPC is finally manifested in macro. The volume contraction. The difference is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/36C04B14/38C04B18/12C04B24/02C04B24/24C04B22/14C04B20/04
CPCC04B28/04C04B40/0039C04B18/12C04B14/383C04B24/026C04B24/24C04B14/36C04B20/04C04B2201/50C04B18/146C04B14/06C04B14/48C04B2103/302C04B22/148C04B22/064Y02W30/91
Inventor 张聪蔡景明鲍世辉李吴刚刘文化张勇鲁晓源张建王喆
Owner 纳思同无锡科技发展有限公司
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