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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 high brittleness, easy cracking, poor mechanical properties such as tensile strength and toughness, and achieve the effects of improving impact resistance, reducing the possibility of cracking, and enhancing toughness

Inactive Publication Date: 2017-10-31
蒋寿春
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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

[0042] Example 1: Contrastive experiment of improving the fireproof and anti-explosion performance of concrete

[0043] 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:

[0044] Specimen 1: Ordinary concrete specimen

[0045] 1) Concrete grade C25.

[0046] 2) The concrete mix ratio refers to the "Ordinary Concrete Mix Ratio Design Regulations, JGJ55-2000", without other admixtures.

[0047] 3) The test was carried out after a curing period of 28 days.

[0048] 4) Mixing system: dry mix fine aggregate + cement + fiber + coarse aggregate for 1 minute, add water and then wet mix for 2 minutes.

[0049] Specimen 2: Porous fiber concrete specimen

[0050] 1) The mix ratio of concrete is the same as above;

[0051] 2) Add polypropylene porous fibers with a dosage of 2kg / m3 into the concrete.

[0052] 3) Stirring system: the...

Embodiment 2

[0055] Embodiment 2: Comparative experiment of anti-shrinkage performance

[0056]In order to verify the anti-cracking 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:

[0057] Specimen 1: Ordinary concrete specimen

[0058] 4) Concrete grade C25.

[0059] 5) Concrete mix ratio refers to "Common Concrete Mix Ratio Design Regulations, JGJ55-2000", without other admixtures.

[0060] 6) Mixing system: dry mix fine aggregate + cement + fiber + coarse aggregate for 1 minute, add water and then wet mix for 2 minutes.

[0061] Specimen 2: Porous fiber concrete specimen

[0062] 1) The mixing ratio and mixing process of concrete are the same as above.

[0063] 2) Add 2kg / m to the concrete 3 porous polypropylene fibers.

[0064] 3) Stirring system: appropriately prolong the stirring time to make the fibers disperse evenly.

[0065] The experimental process was c...

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Abstract

The present invention relates to a porous fiber-modified concrete for cement-based materials. The porous fiber material is added to concrete or mortar in a certain proportion, and a kind of concrete containing porous fiber is produced after fully stirring. The porous fiber concrete has good fire-proof and explosion-proof performance, crack-proof performance, anti-seepage performance, antifreeze performance, impact resistance performance and wear resistance performance, and is an ideal construction engineering material.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/00
CPCC04B28/00C04B20/0056C04B2111/28C04B2111/343
Inventor 蒋寿春
Owner 蒋寿春
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