Low-viscosity and easy-pumping ultrahigh performance concrete and preparation method thereof

An ultra-high-performance concrete technology, applied in the field of building materials, can solve problems such as high viscosity, poor pumping performance, and difficult large-scale construction, and achieve the effects of high fluidity, reduced cement consumption, and reduced pumping resistance
CN110128077AActive Publication Date: 2019-08-16JIANGSU SOBUTE NEW MATERIALS +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU SOBUTE NEW MATERIALS
Publication Date
2019-08-16

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Abstract

The invention discloses a low-viscosity and easy-pumping ultrahigh performance concrete and a preparation method thereof. The concrete comprises, by mass, 300-500 parts of cement, 100-200 parts of silica fume, 300-600 parts of an admixture, 400-800 parts of sands, 300-700 parts of crushed stones, 80-240 parts of fibers, 5-30 parts of a thixotropic enhancer, 15-30 parts of a water reducer, 0.1-0.3part of an antifoaming agent and 140-180 parts of water. The low-viscosity and easy-pumping ultrahigh performance concrete of the invention has a high fluidity and a low viscosity, the pumping resistance is only 0.015-0.025 MPa / m, and the compressive strength after 28 d standard curing is 180 MPa or above. In addition, the low-viscosity and easy-pumping ultrahigh performance concrete of the present invention has a typical low cement content, so the shrinkage of the ultrahigh performance concrete is significantly reduced, the use amount of the cement is significantly reduced, and the environmental pollution is reduced.
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Description

technical field

[0001] The invention belongs to the technical field of building materials and relates to an ultra-high performance concrete, in particular to a low-viscosity and easy-to-pump ultra-high performance concrete and a preparation method thereof. Background technique

[0002] Ultra-high performance concrete (UHPC) has excellent properties such as ultra-high strength, high toughness, high impermeability, high corrosion resistance and high explosion resistance, which can well meet the needs of lightweight, high-rise, large-scale civil engineering structures. The requirements of spanning and high durability have important strategic significance and broad application prospects in major or special projects such as long-span bridges, thin-walled structures, national defense projects, and deep-water offshore platforms. Reactive Powder Concrete (RPC) is the main representative of ultra-high-performance concrete, which mainly improves the compactness through a large amount ...

Claims

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