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A cement-based cementitious material mixed with seawater

A cementitious material and cement-based technology, applied in the field of cement materials, can solve problems such as poor anti-penetration effect, and achieve the effects of excellent volume stability, dry shrinkage and low hydration heat.

Active Publication Date: 2021-12-03
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) Only by modifying metakaolin to refine the pore distribution in concrete, and then improve the anti-chloride ion penetration performance of concrete, the anti-penetration effect is not good

Method used

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  • A cement-based cementitious material mixed with seawater
  • A cement-based cementitious material mixed with seawater
  • A cement-based cementitious material mixed with seawater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present invention includes a seawater mixed cement-based cement-based cement-based cement-based gelation material, which includes 74% of the low-thermal silicate cement, 5% limestone powder, 15% geolar, 5% silicon ash and 1 % Nano Caco 3 .

[0025] In the actual production, due to the low-thermal silicate cement particles, limestone powder particles, genolite granules, silica granules and nano CaCO 3 The particle diameter of the particles cannot be represented by a specific number of devices, so the continuous level is adopted. Among them, the particle size of the low-thermosalite cement cement cement cement cement is 180 mesh ~ 400 mesh; the grain powder particle size range is 400 mesh ~ 800; the genus particle granularity range is 800 mesh ~ 2000; the particle size of the silicone granules is 2000 Entire ~ 8000 mesh; nano-Caco 3 Granular particles are greater than 8,000 mesh, namely nano-Caco 3 The maximum size is 8,000 mesh.

[0026] Active SiO in the lofincture 2 Th...

Embodiment 2

[0037] The present invention includes a seawater mixed cement-based cement-based cement-based cement-based cement-based cement-based cement-based cement-based cement, including 91.5% of the low expansion hypermantosilicate cement, 2% limestone powder, 5% 高, 1% silicon ash and 0.5 % Nano Caco 3 .

[0038] Among them, the particle size of the low-thermosalite cement cement cement cement cement is 180 mesh ~ 400 mesh; the grain powder particle size range is 400 mesh ~ 800; the genus particle granularity range is 800 mesh ~ 2000; the particle size of the silicone granules is 2000 Entire ~ 8000 mesh; nano-Caco 3 The particle size is greater than 8,000 mesh.

[0039] Active SiO in the lofincture 2 The content is greater than 50%; the main component of the silicon ash is an active SiO 2 The content is greater than 90%.

[0040]The above percentages by weight of the components weighed placed in the mixer, mix prepared cement-based binder, the binder was measured bulk density was 0.6956 ti...

Embodiment 3

[0050] The present invention includes a seawater mixed cement-based cement-based cement-based cement-based cement-based cement-based cement-based cement-based cement, including 91.5% of the low expansion hypermantosilicate cement, 2% limestone powder, 5% 高, 1% silicon ash and 0.5 % Nano Caco 3 .

[0051] Wherein the micro-expansion low heat Portland cement particle size range of 120 mesh to 400 mesh; particle size range of limestone powder 400 mesh to 1000 mesh; metakaolin particle size range of 600 mesh to 3000 mesh; silica fume particle size range of 1000 mesh to 8000 mesh; nano CaCO 3 The particle size is greater than 8,000 mesh.

[0052] Active SiO in the lofincture 2 The content is greater than 50%; the main component of the silicon ash is an active SiO 2 The content is greater than 90%.

[0053] The above percentages by weight of the components weighed placed in the mixer, mix prepared cement-based binder, the binder was measured bulk density was 0.6770 tight, generally high...

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Abstract

The invention relates to the field of cement materials, in particular to a seawater-mixed cement-based gelling material, which comprises 74% to 91.5% of micro-expansion low-heat Portland cement and 2% to 5% of limestone by weight percentage. powder, 5%~15% metakaolin, 1%~5% silica fume and 0.5%~1% nano-CaCO3, wherein the particle size of micro-expansion low-heat portland cement is 120 mesh to 400 mesh, and the particle size of limestone powder is 400 mesh to 1000 mesh, the particle size of metakaolin is 600 mesh to 3000 mesh, the particle size of silica fume is 1000 mesh to 8000 mesh; nano CaCO 3 The particle size is greater than 8000 mesh. Based on the theory of close packing, the present invention rationally utilizes raw materials with different particle sizes and different ratios. Under the condition of seawater mixing and curing, the alkalinity of cement stone is lower and the structure is denser, which can effectively reduce or block the damage caused by mud and rock. The way of chemical corrosion can solve the problem of seawater corrosion, which can effectively meet the use conditions of marine engineering, make full use of seawater, and solve the problem of lack of fresh water for construction in island and reef engineering.

Description

Technical field [0001] The present invention relates to the field of cement materials, and more particularly to a seawater mixed cement-based gel material. Background technique [0002] my country is a marine big country. In recent years, the construction of marine island reef project is facing heavy tasks, civilian and military terminals, sea airports, sea wind power stations, sea lighthouse and radar station, and island reef. The core technology of high-performance marine concrete is the technology of cement-based gelation materials and concrete plus (including water reinforcing agents and steel bargers. " [0003] Studies have pointed out that the concrete condensed time prepared by seawater mixed silicate cement is short, the early strength is fast, long-term intensity is inverted, the antifreeze is poor, and the steel bar is faster, there is SO in the sea 4 2- Expansion and CaCL 2 The case where the dissolution is deteriorated. [0004] In the prior art, the authorization a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B40/02C04B111/24
CPCC04B28/04C04B40/0286C04B2111/00017C04B2111/24C04B2201/50C04B14/28C04B14/106C04B18/146C04B22/0026
Inventor 王宁林燕杨涛胡继宗
Owner JIAHUA SPECIAL CEMENT
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