A kind of preparation method of high-performance underwater concrete

A kind of underwater concrete, high-performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the inconvenience of transportation, loading and unloading, storage and mechanical construction, the difficulty of raw material loading and unloading and storage into practice, Abnormal climate change and other issues, to achieve good underwater dispersion resistance, reduce construction costs, and simple manufacturing process

Active Publication Date: 2018-05-04
博康特(北京)材料化学科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Underwater engineering construction, especially in the construction of marine underwater engineering on islands and sea reefs far away from the coastline of the mainland, if the traditional underwater concrete materials currently on the market are still used, such as: cement, river sand, stones, flocculants, etc. If the raw materials and fresh water are mixed together to make concrete, the transportation, loading and unloading, storage and mechanical construction of these concrete raw materials will bring a lot of inconvenience
Not only is the transportation cost too high, but at the same time, under the conditions of the marine environment far from the coastline of the mainland, especially in the construction of islands and reefs that lack fresh water and sand and gravel, it is almost difficult to implement such tasks as loading, unloading and storage of raw materials. In addition, in The climate changes are abnormal on the islands and sea reefs far away from the coastline of the mainland, and the construction environment is harsh

Method used

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  • A kind of preparation method of high-performance underwater concrete
  • A kind of preparation method of high-performance underwater concrete
  • A kind of preparation method of high-performance underwater concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Underwater concrete formulated with Portland cement:

[0030] Table 1:

[0031]

[0032] Underwater concrete formulated with Portland cement:

[0033] Portland cement 62.528.4%, early strength sulphoaluminate cement 42.51.20%, concrete modifier 2.41%, silica fume 3.35%, fly ash 3.24%, aggregate (sandstone) 48.20%, sea water 13.2%,. After accurately weighing the raw materials according to the proportion, mix them with a concrete mixer, add sea water while stirring, and after stirring for 10 minutes, pour the mixed concrete into 4cm×4cm×16cm and 15cm×15cm×15cm that have been placed in water 20cm deep In the mold, take out the test mold from the water after 6 hours, scrape the surface of the mold with a scraper, put it in the water again for curing for 24 hours, measure the compressive strength of the mortar for 1 day after removing the mold, and put the other test pieces in seawater at room temperature for curing to test age.

[0034] After testing, the 1-day compr...

Embodiment 2

[0036] Underwater concrete made with slag cement

[0037] Table 2

[0038]

[0039] Underwater concrete formulated with slag cement:

[0040] Slag cement 42.533.10%, early strength sulphoaluminate cement 42.51.62%, concrete modifier 2.64%, silica fume 3.12%, fly ash 1.62%, aggregate (sandstone) 45.20%, seawater 12.7% ,. After accurately weighing the raw materials according to the proportion, mix them with a concrete mixer, add sea water while stirring, and after stirring for 10 minutes, pour the mixed concrete into 4cm×4cm×16cm and 15cm×15cm×15cm that have been placed in water 20cm deep In the mold, take out the test mold from the water after 6 hours, scrape the surface of the mold with a scraper, put it in the water again for curing for 24 hours, measure the compressive strength of the mortar for 1 day after removing the mold, and put the other test pieces in seawater at room temperature for curing to test age.

[0041] After testing, the 1-day compressive strength of ...

Embodiment 3

[0043] Underwater concrete formulated with slag cement:

[0044] Slag cement 42.536.10%, early strength sulphoaluminate cement 42.51.80%, concrete modifier 2.51%, silica fume 2.69%, fly ash 1.83%, aggregate (sandstone) 35.37%, seawater 14.3% ,. After accurately weighing the raw materials in proportion, stir with a concrete mixer, add seawater while stirring, and after stirring for 5-10 minutes, weigh 5.40% of the polymer resin after water absorption, add it to the concrete mixer, and continue stirring for 1- For 2 minutes, pour the mixed concrete into the 4cm×4cm×16cm and 15cm×15cm×15cm molds that have been placed in water 20cm deep. After 6 hours, take out the test mold from the water, scrape the surface of the mold with a scraper, and then reset it. Put it in water for curing for 24 hours, measure the compressive strength of the mortar for 1 day after removing the formwork, and put the other test blocks in seawater at room temperature for curing until the test age.

[0045...

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Abstract

The invention belongs to the technical field of building materials, and specifically relates to an underwater concrete, which is prepared by preparing cement, sulphoaluminate cement, concrete modifier, slag, silica fume, fly ash, aggregate and mixing water in a certain proportion. to make. In the present invention, the underwater concrete prepared by using the modified cement-based cementitious composite material as the raw material is not easy to disperse underwater, has good fluidity, fast setting time, compact structure of the concrete, and its 1-day compressive strength is 5 ‑40MPa, 20‑90MPa for 28 days. The high-performance underwater concrete of the present invention can adopt the mechanized operation mode of strong stirring and high-power pumping, which can improve work efficiency, and provides a new type of construction material for rapid and large-area pouring of underwater concrete, and is especially suitable for underwater projects It is also suitable for the construction and repair of islands and reefs that lack construction sand and fresh water, and the transportation distance is long, and the island and reef engineering construction is far away from the mainland coastline. The preparation method of the invention is simple and widely used.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-performance underwater concrete. Background technique: [0002] Underwater engineering construction, especially in the construction of marine underwater engineering on islands and sea reefs far away from the coastline of the mainland, if the traditional underwater concrete materials currently on the market are still used, such as: cement, river sand, stones, flocculants, etc. If the raw materials and fresh water are mixed together to make concrete, the transportation, loading and unloading, storage and mechanical construction of these concrete raw materials will bring a lot of inconvenience. Not only is the transportation cost too high, but at the same time, under the conditions of the marine environment far from the coastline of the mainland, especially in the construction of islands and reefs that lack fresh water and sand and gravel, it is almost ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B18/30
CPCY02W30/91
Inventor 汪峻峰
Owner 博康特(北京)材料化学科技发展有限公司
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