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Porous fiber modified concrete

A porous fiber and concrete technology, applied in the field of concrete or mortar, can solve the problems of poor tensile and toughness and other mechanical properties, high brittleness and easy cracking, etc., to reduce the possibility of cracking, improve impact resistance, and enhance the effect of toughness.

Inactive Publication Date: 2007-01-03
SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: when a fire occurs in a concrete building such as a tunnel, it can prevent or weaken the explosion or collapse of the concrete, and at the same time eliminate the mechanical properties of traditional concrete materials such as brittleness, easy cracking, impact resistance, tensile strength and toughness. poor disadvantage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Contrastive experiment of improving the fireproof and anti-explosion performance of concrete

[0035] In order to verify the fire and explosion protection effect of porous fiber concrete, comparative experiments were carried out on ordinary concrete and porous fiber concrete, the situation is as follows:

[0036] Specimen 1: Ordinary concrete specimen

[0037] 1) Concrete grade C25.

[0038] 2) The concrete mix ratio refers to the "Ordinary Concrete Mix Ratio Design Regulations, JGJ55-2000", without other admixtures.

[0039] 3) The test was carried out after a curing period of 28 days.

[0040] 4) Mixing system: dry mix fine aggregate + cement + fiber + coarse aggregate for 1 minute, add water and then wet mix for 2 minutes.

[0041] Specimen 2: Porous fiber concrete specimen

[0042] 1) The mix ratio of concrete is the same as above;

[0043] 2) Add polypropylene porous fibers with a dosage of 2kg / m3 into the concrete.

[0044] 3) Stirring system: the...

Embodiment 2

[0047] Embodiment 2: Comparative experiment of anti-shrinkage performance

[0048] In order to verify the anti-crack and anti-seepage effect of porous fiber concrete, comparative experiments were carried out on ordinary concrete and porous fiber concrete, the situation is as follows:

[0049] Specimen 1: Ordinary concrete specimen

[0050] 4) Concrete grade C25.

[0051] 5) Concrete mix ratio refers to "Common Concrete Mix Ratio Design Regulations, JGJ55-2000", without other admixtures.

[0052] 6) Mixing system: dry mix fine aggregate + cement + fiber + coarse aggregate for 1 minute, add water and then wet mix for 2 minutes.

[0053] Specimen 2: Porous fiber concrete specimen

[0054] 1) The mixing ratio and mixing process of concrete are the same as above.

[0055] 2) Add 2kg / m to the concrete 3porous polypropylene fibers.

[0056] 3) Stirring system: appropriately prolong the stirring time to make the fibers disperse evenly.

[0057] The experimental process was carr...

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PUM

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Abstract

The present invention relates to one kind of porous fiber modified cement-base concrete. Porous fiber material in certain amount is added into concrete or mortar via intensive mixing to form the concrete containing porous fiber. The concrete containing porous fiber as ideal building material has excellent fireproof and antiexplosion performance, anticracking performance, antiseepage performance, antifreezing performance, impact resistance and antiwear performance.

Description

technical field [0001] The invention relates to a concrete material, especially a concrete or mortar of a porous fiber modified cement base material. Background technique [0002] In today's society, fire accidents often occur. For those fire accidents that occur in concrete buildings (such as tunnels, houses, basements, etc.), most casualties are caused by concrete explosion or collapse. The main cause of concrete explosion or collapse is often: when a fire occurs, the temperature of the concrete reaches about 1200°C in a short period of time, and the moisture in the concrete instantly expands into a large amount of water vapor. When the expansion pressure generated by the water vapor exceeds the internal pressure of the concrete When the bond strength is exceeded, the concrete will explode or collapse. To this end, measures should be taken to ensure that the concrete does not explode or collapse when a fire occurs. [0003] One of the commonly used measures at present i...

Claims

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Application Information

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IPC IPC(8): C04B18/08C04B14/04C04B14/48C04B16/08C04B16/06
CPCC04B28/02C04B20/0056Y02W30/91C04B14/48C04B18/08C04B18/146C04B14/386C04B16/0625C04B16/0633C04B16/0641C04B16/0658C04B16/0683C04B16/0691
Inventor 刘凤茹张海文何唯平
Owner SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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