High-strength coral aggregate concrete and preparation method thereof

A high-strength, concrete technology, applied in the field of concrete, can solve the problems that coral aggregate concrete cannot be pumped, achieve the effects of improving workability and microstructure, improving mechanical properties and impermeability, and reducing hydration temperature rise

Active Publication Date: 2018-06-29
CCCC SECOND HARBOR ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention starts from the perspective of reducing production cost, improving concrete strength and durability, and solve

Method used

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  • High-strength coral aggregate concrete and preparation method thereof

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Embodiment 1

[0034] Embodiment 1 (without adding polycarboxylate high-performance water reducing agent)

[0035] The high-strength coral aggregate concrete is made of the following raw materials in parts by weight: 302 parts of low-heat marine Portland cement, 42 parts of fly ash floating beads, 42 parts of mineral powder, 13 parts of silica fume, 13 parts of metakaolin, 4 parts of nano-silica, 4 parts of polyaluminum chloride, 625 parts of coral reef sand, 940 parts of coral reef, 218 parts of sea water.

[0036] The preparation method is:

[0037] Step 1. At room temperature of 22°C, pre-wet the coral reef, coral reef sand and 1 / 10 mass of seawater for 60 seconds to obtain component A;

[0038] Step 2. Pre-mix low-heat marine Portland cement, fly ash floating beads, mineral powder, silica fume, metakaolin, nano-silica, and polyaluminum chloride to obtain component B;

[0039] Step 3: First put component A in a concrete mixer and mix for 30 seconds, then add component B and mix for 60 s...

Embodiment 2

[0049] The high-strength coral aggregate concrete is made of the following raw materials in parts by weight: 302 parts of low-heat marine Portland cement, 42 parts of fly ash floating beads, 42 parts of mineral powder, 13 parts of silica fume, 13 parts of metakaolin, 4 parts of nano-silica, 4 parts of polyaluminum chloride, 625 parts of coral reef sand, 940 parts of coral reef, 218 parts of sea water and 8 parts of polycarboxylate high-performance water reducing agent.

[0050] in,

[0051] The coral reef is a natural undisturbed or broken coral reef with a particle size of 5-20 mm; the coral reef sand is a natural undisturbed coral reef sand with a particle size of 4.75 mm or less.

[0052] The nano-silica SiO 2 The content is greater than 99.8%, and the specific surface area is greater than 160000m 2 / kg.

[0053] The specific surface area of ​​the polyaluminum chloride is greater than 180m 2 / kg.

[0054] SiO of the silica fume 2 The content is greater than 92%, and t...

Embodiment 3

[0082] The high-strength coral aggregate concrete is made of the following raw materials in parts by weight: 302 parts of low-heat marine Portland cement, 42 parts of fly ash floating beads, 42 parts of mineral powder, 13 parts of silica fume, 13 parts of metakaolin, 4 parts of nano-silica, 4 parts of polyaluminum chloride, 625 parts of coral reef sand, 940 parts of coral reef, 218 parts of sea water and 2 parts of polycarboxylate high-performance water reducing agent.

[0083] in,

[0084] The coral reef is a natural undisturbed or broken coral reef with a particle size of 5-20 mm; the coral reef sand is a natural undisturbed coral reef sand with a particle size of 4.75 mm or less.

[0085] The nano-silica SiO 2 The content is greater than 99.8%, and the specific surface area is greater than 160000m 2 / kg.

[0086] The specific surface area of ​​the polyaluminum chloride is greater than 180m 2 / kg.

[0087] SiO of the silica fume 2 The content is greater than 92%, and t...

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Abstract

The invention discloses high-strength coral aggregate concrete which is prepared from the following ingredients in parts by weight: 260-350 parts of low-heat marine Portland cement, 35-50 parts of flyash floating beads, 35-50 parts of mineral powder, 8-16 parts of silica fume, 8-16 parts of metakaolin, 2-6 parts of nano silicon dioxide, 2-6 parts of polyaluminum chloride, 550-679 parts of coral reef sand, 890-1000 parts of coral reef and 180-256 parts of seawater. The high-strength coral aggregate concrete has the advantages that the pelagic engineering construction cost is lowered, and environment-friendly and energy-saving requirements of civil engineering are also met.

Description

technical field [0001] The present invention relates to the field of concrete. More specifically, the present invention relates to a high strength coral aggregate concrete. Background technique [0002] The construction of offshore projects is mostly far away from the mainland, and materials and fresh water resources are scarce. If traditional building materials are used for offshore project construction, there are not only problems of difficult maritime transportation tasks and high transportation costs, but also traditional building materials are durable in marine climate environments. Poor performance and short service life seriously restrict the large-scale construction, management and resource development of the open sea. Therefore, the construction of offshore projects can consider making full use of the surrounding raw materials for engineering construction. For example, coral reefs and coral reef sands can be used as coarse and fine aggregates to prepare marine plai...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/02
CPCC04B20/023C04B28/04C04B2201/50C04B18/082C04B18/141C04B18/146C04B22/12C04B14/02C04B14/062C04B14/068C04B14/106
Inventor 张国志张永涛陈飞翔陈鸣黄灿朱浩王紫超周仁忠项梁郑建新荀东亮翁方文刘丹丁巍李浩黎晖白佳曹高威
Owner CCCC SECOND HARBOR ENG
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