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, Problems such as harsh construction environment, to achieve good underwater dispersion resistance, reduce construction costs, and simple construction process

Active Publication Date: 2015-02-25
博康特(北京)材料化学科技发展有限公司
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  • 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

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  • Preparation method of high performance underwater concrete
  • Preparation method of high performance underwater concrete
  • 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. The underwater concrete is prepared from cement, sulphate aluminium cement, a concrete modifier, slag, silica fume, fly ash, aggregate and mixing water according to a certain ratio. The underwater concrete, which is prepared from a modified cement-based gelling composite material, is not easily dispersed under water; moreover, the fluidity of the underwater concrete is good, the coagulation is quick, the structure of the concrete is compact, the one-day compressive strength is 5 to 40 MPa, and the 28-day compressive strength is 20 to 90 MPa. The high performance underwater concrete is suitable for the mechanical operation mode comprising steps of strong stirring and large-powder pumping, the work efficiency can be improved, a novel building material is provided for the building of large area underwater concrete in a short time, the underwater concrete is especially suitable for the construction and repairing of underwater projects, and at the same time the provided underwater concrete is also suitable for the engineering projects in islands, which are lack of construction sands and fresh water, have a long transportation distance, and are far from the mainland coastline. The preparation method is simple, and can be 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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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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