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Low-chloride ion high-performance concrete

A technology of high-performance concrete and chloride ions, applied in the field of concrete, can solve the problems that ordinary concrete is difficult to meet the requirements of chloride ion content, and achieve the effects of excellent workability and pumpability, high workability and high durability

Inactive Publication Date: 2014-04-09
亚泰集团沈阳建材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary concrete is difficult to meet the requirements of chloride ion content in coastal projects that require high concrete durability, subways and other wet and special structures.

Method used

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  • Low-chloride ion high-performance concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A low-chloride ion high-performance concrete, various raw materials are calculated according to the mass parts as follows: 280 parts of cement; 30 parts of silica fume; 115 parts of fly ash; 120 parts of mineral powder; 155 parts of water; 660 parts of sand; part; 7.5 parts of water reducer, and the water-binder ratio of the concrete is 0.27.

[0023] The water reducer is a polycarboxylate water reducer with a water reducing rate of 32% and a chloride ion content of 0.03%.

[0024] Described water is groundwater, and chloride ion content is 0.0028%.

[0025] The cement is P.I42.5 cement with a chloride ion content of 0.005%, and the 28-day compressive strength of the cement is 59MPa.

[0026] The mineral powder is S95 mineral powder, the specific surface area of ​​said mineral powder is 412㎡ / kg, the chloride ion content is 0.007%; the activity index in 28 days is 105%.

[0027] The fineness modulus of the sand is 2.6, and the chloride ion content is 0.007%.

[0028] ...

Embodiment 2

[0032] A low-chloride ion high-performance concrete, various raw materials are calculated according to the mass parts as follows: 315 parts of cement; 43 parts of silica fume; 83 parts of fly ash; 104 parts of mineral powder; 160 parts of water; 715 parts of sand; part; 8.6 parts of water reducer, and the water-binder ratio of the concrete is 0.3.

[0033] The water reducer is a polycarboxylate water reducer with a water reducing rate of 32% and a chloride ion content of 0.03%.

[0034] Described water is groundwater, and chloride ion content is 0.0028%.

[0035] The cement is P.I42.5 cement with a chloride ion content of 0.005%, and the 28-day compressive strength of the cement is 59MPa.

[0036] The mineral powder is S95 mineral powder, the specific surface area of ​​said mineral powder is 412㎡ / kg, the chloride ion content is 0.007%; the activity index in 28 days is 105%.

[0037] The fineness modulus of the sand is 2.6, and the chloride ion content is 0.007%.

[0038] Th...

Embodiment 3

[0042] A low-chloride ion high-performance concrete, various raw materials are calculated according to the mass parts as follows: 360 parts of cement; 50 parts of silica fume; 70 parts of fly ash; 70 parts of mineral powder; 165 parts of water; 775 parts of sand; part; 9.65 parts of water reducer, and the water-binder ratio of the concrete is 0.32.

[0043] The water reducer is a polycarboxylate water reducer with a water reducing rate of 32% and a chloride ion content of 0.03%.

[0044] Described water is groundwater, and chloride ion content is 0.0028%.

[0045] The cement is P.I42.5 cement with a chloride ion content of 0.005%, and the 28-day compressive strength of the cement is 59MPa.

[0046] The mineral powder is S95 mineral powder, the specific surface area of ​​said mineral powder is 412㎡ / kg, the chloride ion content is 0.007%; the activity index in 28 days is 105%.

[0047] The fineness modulus of the river sand is 2.6, and the chloride ion content is 0.007%.

[0...

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Abstract

The invention belongs to the technical field of the concrete and in particular relates to a low-chloride ion high-performance concrete. The low-chloride ion high-performance concrete is prepared from the following raw materials in parts by weight: 280-360 parts of cement containing 0.005% of chloride ions, 30-50 parts of silica fume containing 0.018% of chloride ions, 70-115 parts of coal ash containing 0.005% of chloride ions, 70-120 parts of mineral powder containing 0.007% of chloride ions, 155-165 parts of water, 660-775 parts of sand containing 0.007% of chloride ions, 976-1098 parts of broken stone containing 0.001% of chloride ions, and 7.50-9.65 parts of water reducing agent containing 0.03% of chloride ions. The total content of chloride ions in the concrete provided by the invention is controlled within the range from 0.015% to 0.018%; and the concrete has the advantages of high workability, high strength and high durability; besides, the strength of the concrete is in the range from C50 to C65.

Description

technical field [0001] The invention belongs to the technical field of concrete, in particular to a low-chloride high-performance concrete. Background technique [0002] Concrete durability has always been a common concern in construction at home and abroad. Inorganic salt corrosion, especially chloride salt corrosion, is one of the main factors affecting the damage of reinforced concrete structures. Ordinary concrete is difficult to meet the requirements of chloride ion content in projects such as coastal areas that require high concrete durability, and in projects with damp and special structures such as subways. Concrete durability mainly refers to the ability of concrete buildings to resist the erosion of environmental media during use and cause the concrete structure to lose its safe use function. Chloride ion erosion is one of the important factors that cause the damage of concrete structures. Chloride ions in concrete react with carbon atoms in steel to form a galvan...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/02C04B14/06C04B18/08
CPCY02W30/91
Inventor 王亮郭金波李文财杨光贾玉新何苗周莉人林志野刘传昆
Owner 亚泰集团沈阳建材有限公司
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