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Crack-free continuous reinforced concrete and method for making the same

A reinforced concrete, crack-free technology, applied in the field of road building materials, can solve the problems affecting the service performance and service life of the road surface, and achieve the effects of improving the bonding ability, high tensile strength and good toughness

Active Publication Date: 2022-07-22
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, under the combined action of temperature and humidity, dry shrinkage cracks and temperature shrinkage cracks are still unavoidable in the continuously reinforced concrete pavement, and it is easy to extend to the asphalt surface layer to form reflective cracks, which affect the performance and performance of the pavement. life

Method used

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  • Crack-free continuous reinforced concrete and method for making the same
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A continuous reinforced concrete without cracks, the continuous reinforced concrete without cracks 1 includes the following components in parts by mass: 10 parts of steel slag-fly ash Portland cement, 35 parts of steel slag fine aggregate, montmorillonite nano- 1 part of powder, 0.1 part of polypropylene fiber, 5.9 parts of water, 48 parts of steel slag coarse aggregate, and high-strength steel mesh 2 pre-buried in concrete.

[0051]Steel slag-fly ash composite Portland cement includes ordinary Portland cement with a strength grade of 42.5, steel slag powder and fly ash; the steel slag powder replaces 20% of the ordinary Portland cement, and the content of free calcium oxide in the steel slag powder 2%. Fly ash replaces 10% of ordinary Portland cement.

[0052] The steel slag coarse aggregate is provided with three particle size ranges, which are 2.36mm~4.75mm, 4.75mm~9.5mm and 9.5mm~16mm respectively.

[0053] The steel slag fine aggregate has a particle size range o...

Embodiment 2

[0077] A crack-free continuous reinforced concrete 1 includes the following components by mass: 11 parts of steel slag-fly ash Portland cement, 46 parts of steel slag coarse aggregate, and steel slag fine aggregate 36 parts, 1 part of montmorillonite nano powder, 0.2 part of polypropylene fiber and 5.8 parts of water; also includes high-strength steel bars embedded in concrete.

[0078] Steel slag-fly ash composite Portland cement includes ordinary Portland cement with strength grade 42.5, steel slag powder and fly ash; among them, steel slag powder replaces 20% of ordinary Portland cement, and free calcium oxide in steel slag powder Content 2%. Fly ash replaces 15% of ordinary Portland cement.

[0079] The steel slag coarse aggregate is provided with three particle size ranges, which are 2.36mm~4.75mm, 4.75mm~9.5mm and 9.5mm~16mm respectively.

[0080] The steel slag fine aggregate has a particle size range of 0 to 2.36 mm, a free calcium oxide content of 2%, and a water sw...

Embodiment 3

[0104] A continuous reinforced concrete without cracks, the continuous reinforced concrete without cracks 1 comprises the following components in parts by mass: 12 parts of steel slag powder composite Portland cement, 48 parts of steel slag coarse aggregate, 32 parts of steel slag fine aggregate, 2 parts of montmorillonite nano powder, 0.2 part of polypropylene fiber and 5.8 parts of water; also includes high-strength steel bars embedded in concrete.

[0105] The steel slag powder composite Portland cement includes ordinary Portland cement and steel slag powder with a strength grade of 42.5; the steel slag powder replaces 25% of the ordinary Portland cement, and the free calcium oxide content in the steel slag powder is 2%.

[0106] The steel slag coarse aggregate is provided with three particle size ranges, which are 2.36mm~4.75mm, 4.75mm~9.5mm and 9.5mm~16mm respectively.

[0107] The steel slag fine aggregate has a particle size range of 0 to 2.36 mm, a free calcium oxide c...

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Abstract

The invention discloses a crack-free continuous reinforced concrete and a preparation method thereof. The concrete comprises the following components: cement, steel slag coarse aggregate, steel slag fine aggregate, montmorillonite nano-powder, polypropylene fiber and water, and a Reinforcement mesh in concrete. The preparation method includes the following steps: Step 1: first dry-mix montmorillonite nano-powder, polypropylene fiber, steel slag coarse aggregate, and steel slag fine aggregate, then add cement for dry mixing, and add water to stir; step 2: fabric; step 3: Paving: Use manual paving or slip-form paver to pave; Step 4: Carry out film-covering health care and hair sweeping treatment; Step 5: Sprinkle water to rinse, and film-cover health care. It can effectively solve the cracking problem of the continuous reinforced concrete pavement, improve the strength and crack resistance of the continuous reinforced concrete slab, so as to achieve the purpose of improving the service performance of the pavement and prolonging the service life of the pavement.

Description

technical field [0001] The invention relates to the technical field of road building materials, in particular to a continuous reinforced concrete without cracks and a manufacturing method thereof. Background technique [0002] Continuously reinforced concrete pavement refers to the cement concrete pavement without transverse shrinkage joints except for expansion joints and construction joints at the junction with other pavements or adjacent structures. This kind of pavement limits the cracking of the panel due to longitudinal shrinkage, overcomes the defects of various pavement diseases (such as mud, staggered platform) caused by the horizontal expansion joints and shrinkage joints of the jointed cement concrete pavement, and also improves the road performance. [0003] In the prior art, under the combined action of temperature and humidity, the continuous reinforced concrete pavement still inevitably produces shrinkage cracks and temperature shrinkage cracks, and it is eas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B18/142C04B14/104C04B16/0633
Inventor 陈小兵罗干生许晓宇王家丰赵静张小瑞宁云峰
Owner SOUTHEAST UNIV